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Khalaji-Verjani M, Masteri-Farahani M. Designing a hybrid nanomaterial based on Cr-containing polyoxometalate and graphene oxide as an electrocatalyst for the hydrogen evolution reaction. Dalton Trans 2024; 53:6920-6931. [PMID: 38563196 DOI: 10.1039/d4dt00320a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
A new polyoxometalate (POM)-based hybrid nanomaterial (denoted as PMo11-Cr-mGO) was designed via covalent interaction between the Cr(acac)3 complex and [PMo11O39]7- followed by immobilization on the surface of modified graphene oxide (mGO). The prepared nanomaterial was characterized using a series of physicochemical techniques. X-ray diffraction (XRD), Raman analysis, transmission electron microscopy (TEM), and FE-SEM-EDS revealed the preservation of layered GO during the formation of the desired hybrid nanomaterial. Fourier transform infrared (FT-IR), X-ray photoelectron spectroscopy (XPS), and elemental analysis confirmed the immobilization of POM (PMo11-Cr) on the surface of mGO and the formation of PMo11-Cr-mGO. In order to evaluate the performance of PMo11-Cr-mGO in the hydrogen evolution reaction (HER), electrochemical measurements were also performed. The resulting PMo11-Cr-mGO exhibited excellent HER activities with a low overpotential of 153 mV at 10 mA cm-2 and good durability in acidic media, thus emerging as one of the most efficient POM-based electrocatalysts.
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Zhang Y, Li K, Zang M, Cheng Y, Qi H. Graphene-based photocatalysts for degradation of organic pollution. CHEMOSPHERE 2023; 341:140038. [PMID: 37660797 DOI: 10.1016/j.chemosphere.2023.140038] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2023] [Revised: 08/30/2023] [Accepted: 08/31/2023] [Indexed: 09/05/2023]
Abstract
Compared with the traditional wastewater treatment technology, semiconductor photocatalysis is a rapidly emerging environment-friendly and efficient Advanced Oxidation Process for degradation of refractory organic contaminants. Single-component semiconductor photocatalysts exhibit poor photocatalytic performance and cannot meet the requirements of wastewater treatment. The combination of semiconductor photocatalysts and Graphene can effectively improve the photocatalytic activity and stability of semiconductor photocatalysts. This review focuses on the synergistic effect of several types of semiconductors with Graphene for photocatalytic degradation of organic pollutants. After a brief introduction of the photodegradation mechanism of semiconductor materials and the basic description of Graphene, the synthesis, characterization and degradation performance of various Graphene-based semiconductor photocatalysts are emphatically introduced.
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Affiliation(s)
- Yuxi Zhang
- School of Science, China University of Geosciences (Beijing), Beijing, 100083, PR China
| | - Kuangjun Li
- School of Science, China University of Geosciences (Beijing), Beijing, 100083, PR China
| | - Meng Zang
- School of Science, China University of Geosciences (Beijing), Beijing, 100083, PR China
| | - Yuanyuan Cheng
- School of Science, China University of Geosciences (Beijing), Beijing, 100083, PR China.
| | - Hongbin Qi
- School of Science, China University of Geosciences (Beijing), Beijing, 100083, PR China.
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Song R, Zhang X, Wang H, Liu C. Polyoxometalate/Cellulose Nanofibrils Aerogels for Highly Efficient Oxidative Desulfurization. Molecules 2022; 27:2782. [PMID: 35566131 PMCID: PMC9101072 DOI: 10.3390/molecules27092782] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2022] [Revised: 04/11/2022] [Accepted: 04/15/2022] [Indexed: 11/26/2022] Open
Abstract
Polyoxometalate (POM) presents great potential in oxidative desulfurization (ODS) reaction. However, the high dissolubility of POM in common solvents makes it difficult to recycle. Besides, the small specific surface area of POM also limits the interaction between them and the substrate. Depositing polyoxometalates onto three-dimensional (3D) network structured materials could largely expand the application of POM. Here, the surfaces of cellulose nanofibrils (CNFs) were modified with very few (3-Aminopropyl) trimethoxysilane (APTS) to endow positive charges on the surfaces of CNFs, and then phosphotungstic acid (PTA) was loaded to obtain the aerogel A-CNF/PTA as the ODS catalyst. FT-IR indicated the successful deposition of PTA onto aminosilane modified CNF surfaces. UV-VIS further suggested the stability of PTA in the aerogels. BET and SEM results suggested the increased specific surface area and the relatively uniform 3D network structure of the prepared aerogels. TGA analysis indicated that the thermal stability of the aerogel A-CNF/PTA50% was a little higher than that of the pure CNF aerogel. Most importantly, the aerogel A-CNF/PTA50% showed good catalytic performance for ODS. Catalysis results showed that the substrate conversion rate of the aerogel A-CNF/PTA50% reached 100% within 120 min at room temperature. Even after five cycles, the substrate conversion rate of the aerogel A-CNF/PTA50% still reached 91.2% during the dynamic catalytic process. This work provides a scalable and facile way to stably deposit POM onto 3D structured materials.
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Affiliation(s)
- Rui Song
- State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510006, China; (R.S.); (H.W.)
| | - Xueqin Zhang
- College of Light Industry and Food Science, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China;
| | - Huihui Wang
- State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510006, China; (R.S.); (H.W.)
| | - Chuanfu Liu
- State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510006, China; (R.S.); (H.W.)
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Guo R, Bai L, Dong G, Chai D, Lang K, Mou Z, Zhao M. Construction of ZnO/Keggin Polyoxometalate Nano-heterojunction Catalyst for Efficient Removal of Rhodamine B in Aqueous Solution. J Inorg Organomet Polym Mater 2022. [DOI: 10.1007/s10904-022-02251-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Exploration of the Cs Trapping Phenomenon by Combining Graphene Oxide with α-K 6P 2W 18O 62 as Nanocomposite. MATERIALS 2021; 14:ma14195577. [PMID: 34639973 PMCID: PMC8509777 DOI: 10.3390/ma14195577] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Revised: 09/19/2021] [Accepted: 09/21/2021] [Indexed: 11/20/2022]
Abstract
A graphene oxide-based α-K6P2W18O62 (Dawson-type polyoxometalate) nanocomposite was formed by using two types of graphene oxide (GO) samples with different C/O compositions. Herein, based on the interaction of GO, polyoxometalates (POMs), and their nanocomposites with the Cs cation, quantitative data have been provided to explicate the morphology and Cs adsorption character. The morphology of the GO-POM nanocomposites was characterized by using TEM and SEM imaging. These results show that the POM particle successfully interacted above the surface of GO. The imaging also captured many small black spots on the surface of the nanocomposite after Cs adsorption. Furthermore, ICP-AES, the PXRD pattern, IR spectra, and Raman spectra all emphasized that the Cs adsorption occurred. The adsorption occurred by an aggregation process. Furthermore, the difference in the C/O ratio in each GO sample indicated that the ratio has significantly influenced the character of the GO-POM nanocomposite for the Cs adsorption. It was shown that the oxidized zone (sp2/sp3 hybrid carbon) of each nanocomposite sample was enlarged by forming the nanocomposite compared to the corresponding original GO sample. The Cs adsorption performance was also influenced after forming a composite. The present study also exhibited the fact that the sharp and intense diffractions in the PXRD were significantly reduced after the Cs adsorption. The result highlights that the interlayer distance was changed after Cs adsorption in all nanocomposite samples. This has a good correlation with the Raman spectra in which the second-order peaks changed after Cs adsorption.
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Lan J, Wang Y, Huang B, Xiao Z, Wu P. Application of polyoxometalates in photocatalytic degradation of organic pollutants. NANOSCALE ADVANCES 2021; 3:4646-4658. [PMID: 36134316 PMCID: PMC9417141 DOI: 10.1039/d1na00408e] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Accepted: 06/24/2021] [Indexed: 05/30/2023]
Abstract
Organic pollutants are highly toxic, accumulative, and difficult to degrade or eliminate. As a low-cost, high-efficiency and energy-saving environmental purification technology, photocatalytic technology has shown great advantages in solving increasingly serious environmental pollution problems. The development of efficient and durable photocatalysts for the degradation of organic pollutants is the key to the extensive application of photocatalysis technology. Polyoxometalates (POMs) are a kind of discrete metal-oxide clusters with unique photo/electric properties which have shown promising applications in photocatalytic degradation. This review summarizes the recent advances in the design and synthesis of POM-based photocatalysts, as well as their application in the degradation of organic dyes, pesticides and other pollutants. In-depth perspective views are also proposed in this review.
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Affiliation(s)
- Jin Lan
- Institute of POM-based Materials, Hubei Provincial Key Laboratory of Green Materials for Light Industry, Hubei University of Technology Wuhan 430068 China
| | - Yu Wang
- Institute of POM-based Materials, Hubei Provincial Key Laboratory of Green Materials for Light Industry, Hubei University of Technology Wuhan 430068 China
| | - Bo Huang
- Institute of POM-based Materials, Hubei Provincial Key Laboratory of Green Materials for Light Industry, Hubei University of Technology Wuhan 430068 China
| | - Zicheng Xiao
- Institute of POM-based Materials, Hubei Provincial Key Laboratory of Green Materials for Light Industry, Hubei University of Technology Wuhan 430068 China
| | - Pingfan Wu
- Institute of POM-based Materials, Hubei Provincial Key Laboratory of Green Materials for Light Industry, Hubei University of Technology Wuhan 430068 China
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Lin Z, Huang J. A hierarchical H3PW12O40/TiO2 nanocomposite with cellulose as scaffold for photocatalytic degradation of organic pollutants. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.118427] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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Liu Y, Wang F, Lv Y, Yu S, Wang R, Jiao W. Three-Dimensional Graphene Oxide Covalently Functionalized with Dawson-Type Polyoxotungstates for Oxidative Desulfurization of Model Fuels. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.0c04384] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Yefeng Liu
- School of Chemical Engineering and Technology, North University of China, Taiyuan, Shanxi 030051, China
| | - Fei Wang
- School of Chemical Engineering and Technology, North University of China, Taiyuan, Shanxi 030051, China
| | - Ying Lv
- School of Chemical Engineering and Technology, North University of China, Taiyuan, Shanxi 030051, China
| | - Saisai Yu
- School of Chemical Engineering and Technology, North University of China, Taiyuan, Shanxi 030051, China
| | - Ruixin Wang
- School of Chemical Engineering and Technology, North University of China, Taiyuan, Shanxi 030051, China
| | - Weizhou Jiao
- School of Chemical Engineering and Technology, North University of China, Taiyuan, Shanxi 030051, China
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Wang R, Liu Y, Zuo P, Zhang Z, Lei N, Liu Y. Phthalocyanine-sensitized evolution of hydrogen and degradation of organic pollutants using polyoxometalate photocatalysts. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:18831-18842. [PMID: 32207021 DOI: 10.1007/s11356-020-08425-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2020] [Accepted: 03/12/2020] [Indexed: 06/10/2023]
Abstract
In this study, 2 (3), 9 (10), 16 (17), 23 (24)-tetrakis-(8-quinoline-oxy) phthalocyanine zinc(II) (ZnQPc) was prepared and then quaternized to obtain water soluble zinc phthalocyanine (ZnQPc4+). Then, ZnQPc4+ was used as a photosensitizer for a series of POM catalysts, including Dawson type K6[α-P2W18O62]·14H2O (P2W18) and K10[α-P2W17O61]·20H2O (P2W17) and Keggine type H3PW12O40·xH2O (PW12). The Keggin type PW12 showed higher efficiency with 18.2 μmol of H2 evolution (turnover number (TON) = 14,550) for 6 h upon ZnQPc4+ sensitization in relation to two Dawson P2W17 and P2W18 in a visible light-driven water-soluble system with isopropanol and H2PtCl6·6H2O. In addition, the complexes of ZnQPc4+ with a series of POM catalysts (P2W17, P2W18, and PW12) were also used as photocatalysts for the degradation of methylene blue (MB) in water, and it was found that the complexes of ZnQPc4+ with P2W17 and PW12 showed improved photocatalytic activity, and the degradation rates of MB reached 100% at a small dosage under natural pH and visible light. The high efficacy of POM catalysts for H2 evolution and the degradation of MB were attributed to the sensitization of POMs by ZnQPc4+, which was enabled by the transfer of photogenerated electrons of ZnQPc4+ to the lowest unoccupied molecular orbital (LUMO) of POM.
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Affiliation(s)
- Ruixin Wang
- School of Chemical Engineering and Technology, North University of China, Taiyuan, 030051, Shanxi, China.
| | - Yefeng Liu
- School of Chemical Engineering and Technology, North University of China, Taiyuan, 030051, Shanxi, China
| | - Peng Zuo
- School of Chemical Engineering and Technology, North University of China, Taiyuan, 030051, Shanxi, China
| | - Zhendong Zhang
- School of Chemical Engineering and Technology, North University of China, Taiyuan, 030051, Shanxi, China
| | - Nana Lei
- School of Chemical Engineering and Technology, North University of China, Taiyuan, 030051, Shanxi, China
| | - Yaqing Liu
- Shanxi Province Key Laboratory of Functional Composites, North University of China, Taiyuan, 030051, Shanxi, China.
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