Synthesis and Characterization of Cerium Metal Organic Frameworks (Ce-UiO-66) and Its Inorganic Hybrids

Dingetegna Godana Boynito; Abi Taddesse Mengesha; Neelaiah Babu G.

doi:doi:10.11648/j.am.20251401.11

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Synthesis and Characterization of Cerium Metal Organic Frameworks (Ce-UiO-66) and Its Inorganic Hybrids

Dingetegna Godana Boynito, Abi Taddesse Mengesha^*

, Neelaiah Babu G.

Published in Advances in Materials (Volume 14, Issue 1)

Received: 10 October 2024 Accepted: 20 November 2024 Published: 17 January 2025

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Abstract

Applications of metal-organic frameworks. Metal organic frameworks (MOFs) as exciting type of organic/inorganic hybrid materials have attracted great focus of scientists in the last two decades. The objective of this study was to synthesize Ce-UiO-66 and its inorganic hybrids (CdS/Ce-UiO-66/Ag₃PO₄) and characterize the synthesize cerium metal organic frameworks (Ce-UiO-66) and its inorganic hybrids. All the materials in this work were prepared via hydrothermal synthesis and characterized by X-ray powder diffraction (XRD) and scanning electron microscope (SEM) hyphenated with energy dispersive x-ray (EDX). From XRD data, peaks at 28.2, 29, 46.7 and 48.7 suggests the occurrence of CeO₂. The three typical diffraction peaks observe at 2θ values of 26.67, 44.00 and 52.05 corresponding to miller indices of (100), (202) and (311) could be ascribed to the hawleyite structure of CdS. For the (1:1) ratio of CdS to Ce-Uio-66/Ag₃PO₄ the XRD result reveal that the MOF structure disappeared making it more amorphous when compare to the other ratios. As the result, no diffraction peak attributable to Ag₃PO₄ was observed. The scanning electron microscope (SEM) hyphenated with energy dispersive x-ray (EDX) analysis for all the inorganic hybrids raveal that all the distinct morphologies shown in their single phase vanished upon composite formation evidencing the well mix of each components. The EDX spectra in all cases show the presence of each component in the ternary system. Generally, in this research we focus on the synthesis of Ce-MOF and its inorganic hybrids and characterizations were studied. All the as-synthesized materials fall in the nanoscale.

Published in	Advances in Materials (Volume 14, Issue 1)
DOI	10.11648/j.am.20251401.11
Page(s)	1-7
Creative Commons	This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.
Copyright	Copyright © The Author(s), 2025. Published by Science Publishing Group

Keywords

Metal Organic Frameworks (MOFs), Inorganic Hybrids, Ce-UiO-66

1. Introduction

Metal organic frameworks (MOFs) represent a class of porous material which is formed by strong bonds between metal ions and organic linkers

[1]

. Metal-organic frameworks (MOFs) are highly versatile materials that find applications in several fields.

In recent decades, metal-organic frameworks (MOFs) have attracted widespread attention as an emerging class of porous crystal materials, which are coordinated by metal ions/clusters and multifunctional organic ligands

[2]

Nanoparticle/metal–organic frameworks (MOF) based composites have recently attracted significant attention as a new class of catalysts. Such composites possess the unique features of MOFs (including clearly defined crystal structure, high surface area, single site catalyst, special confined nanopore, tunable, and uniform pore structure), but avoid some intrinsic weaknesses (like limited electrical conductivity and lack in the “conventional” catalytically active sites)

[3]

. To date many types of MOF composites have been developed to make use of the main aspects of MOF chemistry and to realize the full potential for their future utility. The increased number of materials that can be bound to each other (MOFs, hybrid materials, and nanocomposites) offers a chance to develop novel material properties

[4-6]

Here we report on by synthesis of cerium metal-organic framework Ce-UiO-66 and its inorganic hybrids, CdS/Ce-UiO-66, Ce-UiO-66/Ag₃PO₄, and three different molar ratios of CdS to Ce-UiO-66/Ag₃PO₄ of CdS/Ce-UiO-66/Ag₃PO₄ (1:1, 0.75:1 and 0.5:1) MOF composites.

2. Materials and Methods

2.1. Experimental Work Site

All the synthesis and catalytic studies were conducted at the Chemistry Department Research Laboratory in Haramaya University. The characterizations, XRD and SEM-EDX were conducted in Madrid Spain.

2.2. Instruments and Apparatus

Different types of instruments and apparatus were used during the synthesis and characterizations of (Ce-MOF and its inorganic hybrids) Oven (Sanyo, OMT, U.K), centrifuge (HERMLE300, Germany), 1100 Hotplate and stirrer (Philip harris), magnetic stirrer, thermal balance, Furnace (Bibby Stuart, U.K), Sonicator (Kerry), X-ray diffractometer (XRD, Philips Analytical, PW-3040)), scanning electron microscopy (HITACHI Table top Microscope TM-1000), Kiesegel 60, 254, Merck, Germany),, Petri dish, filter papers (Whatman No.1), sample holders, capillary tubes, melting point measuring instrument (Bibby Starling LTD, ST150SA model, U.K) analytical balance, pH-meter (MP220),, mortar, crucible, test tubes, deionizer (HP143JH, U.K), distiller (Lasany, LPH-4, India), pipette, wash bottles, pyrex glass bottles and beakers.

2.3. Chemicals and Reagents

All chemicals and reagents were all of analytical grade. Cerium nitrate hexahydrate (Ce(NO₃)₃·6H₂O, 99%), Terephthalic acid (H₂BDC, 98%), concentrated HCl (BDH chemicals Ltd, England, 37%), Na₂S.9H₂O (Merck, Darmstadt, 99%), Cd(CH₃COO^-)₂ (BDH, England, 99%), AgNO₃ (UNiChem, AR, 99.8%), Na₂HPO₄(BDH, England, 98%), Na₂HPO₄.12H₂O (Guangdong, China, > 99.0%), sodium hydroxide (NaOH), ethanol (Fine chemical, Ethiopia, 97%), and Ethyl acetate (99.9% CARLO EBRA, France).

2.4. Experimental Procedure

2.4.1. Synthesis of Ce-UiO-66

The synthesis of Ce-UiO-66 was carried out according to

[7]

with little modifications. Briefly, 4.3445 g (11.62 mmol) of Cerium nitrate hexahydrate salt (Ce(NO₃)₃.8H₂O), 2.4803 g (14.92 mmol) of terephthalic acid (TPA) was dissolved separately in 50 mL of DIW. Then equimolar (1M) solution of ammonia with water was added into the linker solution drop by drop to deprotonate the organic acid completely though control of the pH. Next the metal salt solution was added to the linker solution with magnetic stirring for 1 h. The white precipitate formed was centrifuged at 2500 rpm for 20 min. The product was washed three times sequentially with DIW and ethanol then filtered. Finally the white colored solid was dried in an oven at 60°C for 24 h and the material was designated as S1.

2.4.2. Synthesis of CdS /Ce-UiO-66

CdS/Ce-UiO-66 composites were prepared using the same methodas used for the preparation of pure CdS with some modifications. 1.00 g each of UiO-66 and Cd(CH₃COO)₂·₂H₂O were dispersed in 50 mL of DIW. The suspension were transferred into an oven and heated at 100°C for 12 h. After that, the products were cooled to room temperature, and the precipitates were collected by centrifugation and then purified with DIW and ethanol several times. The final products will be dried at 60 ◦C under vacuum. The obtained samples were labeled as CdS/UiO-66

[8, 9]

and denoted as B1.

2.4.3. Synthesis of Ce-UiO-66/Ag₃PO₄

UiO-66 (Ce)/Ag₃PO₄ composites were prepared via an in situ ion-exchange precipitation method with direct substitution of Cerium into Zr-MOF

[10]

. Firstly, 1.01 g as-prepared Ce-UiO-66 was dispersed in 100.0 mL of distilled water and sonicated for 30.0 min. Then, 1.0 g AgNO₃ was added and sonicated for another 30.0 min. After that, 0.7 g Na₂HPO₄.12H₂O was dissolved in 10.0 mL of distilled water and added drop wise into the above solution under vigorous stirring. After stirring for 12 h, the final products were collected via filtration, washed with distilled water and ethanol three times and then dried under 60 °C in an oven for 2 h and denoted as B2.

2.4.4. Synthesis of Ternary CdS/UiO-66-Ce/Ag₃PO₄

The ternary nanocomposite CdS/UiO-66-Ce/Ag ₃PO₄ were prepared by taking 1.0 g of UiO-66-Ce/Ag₃PO₄ nanocomposite with three different molar ratios of CdS versus UiO-66-Ce/Ag₃PO₄; i.e., 1:1, 0.75:1 and 0.5. Accordingly, the required amount of the binary composite was dissolved in 50 mL of deionized water and sonicate for 2 h. Next calculated amount of Cd(CH₃COO)₂was added and sonicated for additional 30 min. After this, stoichiometric amount of Na₂S.9H₂O was dissolved in 50 mL deionized water and added to the above mixture then stirred vigorously for 12 h. Finally the blue black precipitate was collected and washed with deionized water and ethanol three times and lastly dried at 80°C in oven for 6 h.

3. Results

3.1. Synthesis of Nanomaterial’s

In this work, CdS, Ag₃PO_4,Ce-MOF and its inorganic hybrids (CdS/UiO-66-Ce, UiO-66-Ce/Ag₃PO₄and CdS/UiO-66-Ce/Ag₃PO₄, with different molar ratio (1:1; 0.75:1 and 0.5:1) of CdS to UiO-66/Ag₃PO₄), were synthesized by precipitation and hydrothermal methods.

3.2. Characterization Nanomaterial’s CdS/UiO-66-Ce/Ag₃PO₄

The as-synthesized materials were then characterized by a variety of different techniques

XRD Analysis

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Figure 1. XRD Spectra of Ce-UiO-66, CdS, Ag₃PO₄, CdS/ Ce-UiO-66 and Ce-UiO-66/Ag₃PO_4.

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Figure 2. The XRD spectra of thee different molar ratios ofCd:Ce in CdS/Ce-UiO-66/Ag₃PO₄(1:1(T1), 0.75:1(T2) and 0.5:1(T)).

The average crystallite size of the as-synthesized UiO-66(Ce-MOF) can be calculated using the Debye Scherrer formula;

Ds = \frac{0.9 λ}{βCosθ}

(1)

Where Ds = is the average crystallite size; = is the wavelength of the X-rays equals to 0.15406 nm corresponds to the Cu target Kα radiation; β = is the full width of half-maximum (FWHW) of an XRD, and  = is the Bragg diffraction angle in radians.

Table 1. Average crystallite sizes of the as-synthesized nanomaterials.

Sample	2θ (degree)	β (radians)	Ds (nm)
Ce-UiO-66	9.3	0.0035	39.6
CdS	26.48	0.0140	10.3
Ag₃PO₄	33.31	0.0035	40.8
CdS/Ce-UiO-66	9.03	0.0023	60.3
Ce-UiO-66/Ag₃PO₄	13.11	0.0035	39.6
CdS/Ce-UiO-66/Ag₃PO₄(1:1) (T1)	26.62	0.0257	5.5
CdS/Ce-UiO-66/Ag₃PO₄ (0.75:1) (T2)	26.22	0.0245	5.8
CdS/Ce-UiO-66/Ag₃PO₄(0.5:1) (T3)	9.86	0.0023	60.3

All the as-synthesized materials fall in the nanoscale.

4. Discussions

The XRD pattern of CdSis shown in figure 1a. The three typical diffraction peaks observe at 2θ values of 26.67, 44.00 and 52.05 corresponding to miller indices of (100), (202) and (311) could be ascribed to the hawleyite structure of CdS [96-101-1261]. The result is in agreement to the literature reported

[9]

. The XRD pattern of Ag₃PO₄is shown in figure 1e. The apparent diffraction peak at around 2θ = 20.9°, 29.7°, 32.3°, 33.3°, 36.6°, 38.1°, 42.5° are the confirmations for the existence of cubic structure of Ag₃PO₄[JCPD No.] impurity peaks were found indicating the formation of pure Ag₃PO_4.The sharp and narrow peaks indicate that Ag₃PO₄ microcrystals are high purity and good crystallization

[11-13]

As shown in Figure 1c, the most probable diffraction peaks for MOFs were found below scattering angle (2θ) of 10 and this is the characteristics of porous materials, which possess abundant pores or cavities. This means that; as the 2θ becomes less and less the material assumes a more porous character and the more it has MOF’s character. Thus, diffraction peaks, which are only found at 2θ closer to 10 and below were, selected

[14]

. The major peaks in the XRD patterns of UiO-66(Ce-MOF) is comparable with those reported on different literature

[15, 16]

. From XRD data, peaks at 28.2, 29, 46.7 and 48.7 suggests the occurrence of CeO₂

[17, 18]

As presented in Figure 1b, the XRD patterns of the CdS/Ce-UiO-66 showed the peaks attributable to both. However, the major peak at 2θ value of 26.67 responsible for CdS appeared to be weak perhaps due to well dispersion of these crystals in the MOF pores. Otherwise all the major peaks are attributable to the Ce-MOF. In the case of Ce-UiO-66/Ag₃PO₄nanocomposite displayed in Figure 1d peaks attributable to both are also exhibited. In apparent contrast to the CdS/Ce-UiO-66 MOFs, major shift in peak position is noted in the case of Ce-UiO-66/Ag₃PO₄.

For the ternary systems, the general trend observed is the influence of CdS amount on the MOF structure. When the ratio of CdS to Ce-Uio-66/Ag₃PO₄ reached 1:1, the MOF structure disappeared making it more amorphous and more like CdS than MOF composite. As the result, no diffraction peak attributable to Ag₃PO₄ was observed. For the remaining compositions, the MOF structure is preserved. Besides, the peaks attributable to Ce-UiO-66, Ag₃PO₄ and CdS are all observed.

SEM-EDX Analysis

The morphologies and elemental composition of as-prepared Ce-UiO-66 and its inorganic hybrids (CdS/ Ce- UiO-66, Ce- UiO-66/Ag₃PO_4,and CdS/Ce-UiO-66/Ag₃PO₄ in various proportions were investigated by SEM-EDX (Figures 3a-h).

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Figure 3. SEM micrograph of a) S1; b) S2 C) S3 d) B1 e) B2 f) T1 g) T2 h) T3 at high magnification and corresponding EDX spectra.

The SEM images Ce-UiO-66 products revealed rice like crystals with an average width ∼ 100 nm (Figure 3a). Moreover, a lot of small microcrystals with an average edge length of ∼300 nm were observed with uniform size distribution. It is clear from Figure 3b that the simple Ag₃PO₄ are uniformly cubic-like in shape and uniformly distributed. The SEM micrograph of CdS revealed that there is the presence of well-structured and crystalline grains in the material (Figure 3c). When observed clearly at the micrograph obviously indicates the formation of hexagonal structure representing the greenockite like structure of the nanoparticles. The corresponding EDX spectrum for each single phase reveal the presence of only Ce for the Ce-UiO-66, Ag and P for Ag₃PO₄ and Cd and S for CdS nanoparticles confirming the formation of pure phase with no impurity in all cases. For example, the average elemental percentage ratio of Cd:S was found to be 81.4% to 18.6% confirming almost a complete consumption of Cd precursor utilized and this is in good agreement with the result reported earlier

[18]

For the binary system CdS/Ce-UiO-66, the SEM micrograph cleary exhibits the pore structure of the MOFs upon which crystals of CdS are deposited (Figure 3d). In contrast to this, the binary system comprising Ag₃PO₄/Ce-UiO-66 (Figure 3e) showed distinct rice like structure of the MOF intermingled with Ag₃PO₄ crystals. The corresponding EDX spectra for both cases show the presence of all the components evidencing the purity of this phase although quite heterogeneous in the later case (Figure 3e).

For the ternary systems (Figure 3 f-h), all the distinct morphologies shown in their single phase vanished upon composite formation evidencing the well mix of each components. The EDX spectra in all cases show the presence of each component in the ternary system.

5. Conclusions

In this work, Ce-UiO-66, CdS, Ag₃PO₄ and the inorganic hybrids of Ce-UiO-66i.e; the binary and ternary systems were synthesized successfully by co-precipitation and a simple hydrothermal method at room temperature. The present method is advantageous as it does not involve any organic solvents and works at 25 ºC which complies with the Green Chemistry norms. Moreover, as-synthesized Ce-UiO-66, CdS, Ag₃PO4 and the inorganic hybrids of CeUiO-66 were characterized using PXRD and SEM-EDX. The XRD results revealed that as synthesized materials were Ce-UiO-66, CdS, Ag₃PO₄ and the inorganic hybrids Ce-UiO-66 were all crystalline and the results matches with previously reported ones. The XRD result showed that CdS/Ce-UiO-66/ Ag₃PO₄ (1:1 and 0.75:1) and CdS have the smaller crystalline sizes compared to other as-synthesized material as shown in (Table 1). SEM micrograph showed cooked rice like particles for Ce- UiO-66 and cubic structures where observed for CdS.

Abbreviations

XRD	X-ray Powder Diffraction
SEM	Scanning Electron Microscope
EDX	Hyphenated with Energy Dispersive X-ray

Conflicts of Interest

The authors declare no conflicts of interest.

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Boynito, D. G., Mengesha, A. T., G., N. B. (2025). Synthesis and Characterization of Cerium Metal Organic Frameworks (Ce-UiO-66) and Its Inorganic Hybrids. Advances in Materials, 14(1), 1-7. https://doi.org/10.11648/j.am.20251401.11

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Boynito, D. G.; Mengesha, A. T.; G., N. B. Synthesis and Characterization of Cerium Metal Organic Frameworks (Ce-UiO-66) and Its Inorganic Hybrids. Adv. Mater. 2025, 14(1), 1-7. doi: 10.11648/j.am.20251401.11

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Boynito DG, Mengesha AT, G. NB. Synthesis and Characterization of Cerium Metal Organic Frameworks (Ce-UiO-66) and Its Inorganic Hybrids. Adv Mater. 2025;14(1):1-7. doi: 10.11648/j.am.20251401.11

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@article{10.11648/j.am.20251401.11,
  author = {Dingetegna Godana Boynito and Abi Taddesse Mengesha and Neelaiah Babu G.},
  title = {Synthesis and Characterization of Cerium Metal Organic Frameworks (Ce-UiO-66) and Its Inorganic Hybrids},
  journal = {Advances in Materials},
  volume = {14},
  number = {1},
  pages = {1-7},
  doi = {10.11648/j.am.20251401.11},
  url = {https://doi.org/10.11648/j.am.20251401.11},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.am.20251401.11},
  abstract = {Applications of metal-organic frameworks. Metal organic frameworks (MOFs) as exciting type of organic/inorganic hybrid materials have attracted great focus of scientists in the last two decades. The objective of this study was to synthesize Ce-UiO-66 and its inorganic hybrids (CdS/Ce-UiO-66/Ag3PO4) and characterize the synthesize cerium metal organic frameworks (Ce-UiO-66) and its inorganic hybrids. All the materials in this work were prepared via hydrothermal synthesis and characterized by X-ray powder diffraction (XRD) and scanning electron microscope (SEM) hyphenated with energy dispersive x-ray (EDX). From XRD data, peaks at 28.2, 29, 46.7 and 48.7 suggests the occurrence of CeO2. The three typical diffraction peaks observe at 2θ values of 26.67, 44.00 and 52.05 corresponding to miller indices of (100), (202) and (311) could be ascribed to the hawleyite structure of CdS. For the (1:1) ratio of CdS to Ce-Uio-66/Ag3PO4 the XRD result reveal that the MOF structure disappeared making it more amorphous when compare to the other ratios. As the result, no diffraction peak attributable to Ag3PO4 was observed. The scanning electron microscope (SEM) hyphenated with energy dispersive x-ray (EDX) analysis for all the inorganic hybrids raveal that all the distinct morphologies shown in their single phase vanished upon composite formation evidencing the well mix of each components. The EDX spectra in all cases show the presence of each component in the ternary system. Generally, in this research we focus on the synthesis of Ce-MOF and its inorganic hybrids and characterizations were studied. All the as-synthesized materials fall in the nanoscale.},
 year = {2025}
}

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TY - JOUR
T1 - Synthesis and Characterization of Cerium Metal Organic Frameworks (Ce-UiO-66) and Its Inorganic Hybrids
AU - Dingetegna Godana Boynito
AU - Abi Taddesse Mengesha
AU - Neelaiah Babu G.
Y1 - 2025/01/17
PY - 2025
N1 - https://doi.org/10.11648/j.am.20251401.11
DO - 10.11648/j.am.20251401.11
T2 - Advances in Materials
JF - Advances in Materials
JO - Advances in Materials
SP - 1
EP - 7
PB - Science Publishing Group
SN - 2327-252X
UR - https://doi.org/10.11648/j.am.20251401.11
AB - Applications of metal-organic frameworks. Metal organic frameworks (MOFs) as exciting type of organic/inorganic hybrid materials have attracted great focus of scientists in the last two decades. The objective of this study was to synthesize Ce-UiO-66 and its inorganic hybrids (CdS/Ce-UiO-66/Ag3PO4) and characterize the synthesize cerium metal organic frameworks (Ce-UiO-66) and its inorganic hybrids. All the materials in this work were prepared via hydrothermal synthesis and characterized by X-ray powder diffraction (XRD) and scanning electron microscope (SEM) hyphenated with energy dispersive x-ray (EDX). From XRD data, peaks at 28.2, 29, 46.7 and 48.7 suggests the occurrence of CeO2. The three typical diffraction peaks observe at 2θ values of 26.67, 44.00 and 52.05 corresponding to miller indices of (100), (202) and (311) could be ascribed to the hawleyite structure of CdS. For the (1:1) ratio of CdS to Ce-Uio-66/Ag3PO4 the XRD result reveal that the MOF structure disappeared making it more amorphous when compare to the other ratios. As the result, no diffraction peak attributable to Ag3PO4 was observed. The scanning electron microscope (SEM) hyphenated with energy dispersive x-ray (EDX) analysis for all the inorganic hybrids raveal that all the distinct morphologies shown in their single phase vanished upon composite formation evidencing the well mix of each components. The EDX spectra in all cases show the presence of each component in the ternary system. Generally, in this research we focus on the synthesis of Ce-MOF and its inorganic hybrids and characterizations were studied. All the as-synthesized materials fall in the nanoscale.
VL - 14
IS - 1
ER -

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Author Information

Dingetegna Godana Boynito

Department of Chemistry, College of Natural and Computational Sciences, Jinka University, Jinka, Ethiopia

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Abi Taddesse Mengesha

Department of Chemistry, College of Natural and Computational Sciences, Haramaya University, Haramaya, Ethiopia

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http://orcid.org/0000-0002-0071-6207
Neelaiah Babu G.

Department of Chemistry, College of Natural and Computational Sciences, Haramaya University, Haramaya, Ethiopia

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http://orcid.org/0000-0003-4136-7602

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Table 1

Table 1. Average crystallite sizes of the as-synthesized nanomaterials.

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Boynito, D. G., Mengesha, A. T., G., N. B. (2025). Synthesis and Characterization of Cerium Metal Organic Frameworks (Ce-UiO-66) and Its Inorganic Hybrids. Advances in Materials, 14(1), 1-7. https://doi.org/10.11648/j.am.20251401.11

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ACS Style

Boynito, D. G.; Mengesha, A. T.; G., N. B. Synthesis and Characterization of Cerium Metal Organic Frameworks (Ce-UiO-66) and Its Inorganic Hybrids. Adv. Mater. 2025, 14(1), 1-7. doi: 10.11648/j.am.20251401.11

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AMA Style

Boynito DG, Mengesha AT, G. NB. Synthesis and Characterization of Cerium Metal Organic Frameworks (Ce-UiO-66) and Its Inorganic Hybrids. Adv Mater. 2025;14(1):1-7. doi: 10.11648/j.am.20251401.11

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@article{10.11648/j.am.20251401.11,
  author = {Dingetegna Godana Boynito and Abi Taddesse Mengesha and Neelaiah Babu G.},
  title = {Synthesis and Characterization of Cerium Metal Organic Frameworks (Ce-UiO-66) and Its Inorganic Hybrids},
  journal = {Advances in Materials},
  volume = {14},
  number = {1},
  pages = {1-7},
  doi = {10.11648/j.am.20251401.11},
  url = {https://doi.org/10.11648/j.am.20251401.11},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.am.20251401.11},
  abstract = {Applications of metal-organic frameworks. Metal organic frameworks (MOFs) as exciting type of organic/inorganic hybrid materials have attracted great focus of scientists in the last two decades. The objective of this study was to synthesize Ce-UiO-66 and its inorganic hybrids (CdS/Ce-UiO-66/Ag3PO4) and characterize the synthesize cerium metal organic frameworks (Ce-UiO-66) and its inorganic hybrids. All the materials in this work were prepared via hydrothermal synthesis and characterized by X-ray powder diffraction (XRD) and scanning electron microscope (SEM) hyphenated with energy dispersive x-ray (EDX). From XRD data, peaks at 28.2, 29, 46.7 and 48.7 suggests the occurrence of CeO2. The three typical diffraction peaks observe at 2θ values of 26.67, 44.00 and 52.05 corresponding to miller indices of (100), (202) and (311) could be ascribed to the hawleyite structure of CdS. For the (1:1) ratio of CdS to Ce-Uio-66/Ag3PO4 the XRD result reveal that the MOF structure disappeared making it more amorphous when compare to the other ratios. As the result, no diffraction peak attributable to Ag3PO4 was observed. The scanning electron microscope (SEM) hyphenated with energy dispersive x-ray (EDX) analysis for all the inorganic hybrids raveal that all the distinct morphologies shown in their single phase vanished upon composite formation evidencing the well mix of each components. The EDX spectra in all cases show the presence of each component in the ternary system. Generally, in this research we focus on the synthesis of Ce-MOF and its inorganic hybrids and characterizations were studied. All the as-synthesized materials fall in the nanoscale.},
 year = {2025}
}

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