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Qin F, Zhang L, Luo Y, He L, Lu S, Xu L, Zhu X, Feng W. Effect of Ag Modification on the Structure and Photocatalytic Performance of TiO2/Muscovite Composites. Molecules 2023; 28:molecules28073187. [PMID: 37049946 PMCID: PMC10095781 DOI: 10.3390/molecules28073187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Revised: 03/27/2023] [Accepted: 03/29/2023] [Indexed: 04/07/2023] Open
Abstract
Ag/TiO2/muscovite (ATM) composites were prepared by the sol–gel method and the effects of Ag modification on the structure and photocatalytic performance were investigated. The photocatalysts were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Brunauer–Emmett–Teller surface area (BET), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectra (FTIR), photoluminescence spectra (PL) and ultraviolet–visible diffuse reflectance spectra (DRS). The photocatalytic activity of the obtained composites was evaluated by taking 100 mL (10 mg/L) of Rhodamine B (RhB) aqueous solution as the target pollutant. The muscovite (Mus) loading releases the agglomeration of TiO2 particles and the specific surface area increases from 17.6 m2/g (pure TiO2) to 39.5 m2/g (TiO2/Mus). The first-order reaction rate constant increases from 0.0009 min−1 (pure TiO2) to 0.0074 min−1 (150%TiO2/Mus). Ag element exists in elemental silver. The specific surface area of 1-ATM further increases to 66.5 m2/g. Ag modification promotes the separation of photogenerated electrons and holes and increases the visible light absorption. 1%Ag-TiO2/Mus (1-ATM) exhibits the highest photocatalytic activity. After 100 min, the rhodamine B (RhB) degradation degrees of PT, 150%TiO2/Mus and 1-ATM are 10.4%, 48.6% and 90.6%, respectively. The first-order reaction rate constant of 1-ATM reaches 0.0225 min−1, which is 25 times higher than that of pure TiO2.
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Affiliation(s)
- Fengqiu Qin
- School of Mechanical Engineering, Chengdu University, Chengdu 610106, China
| | - Ling Zhang
- School of Mechanical Engineering, Chengdu University, Chengdu 610106, China
| | - Yuhao Luo
- College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610051, China
| | - Lili He
- School of Mechanical Engineering, Chengdu University, Chengdu 610106, China
| | - Shiji Lu
- School of Mechanical Engineering, Chengdu University, Chengdu 610106, China
| | - Li Xu
- School of Mechanical Engineering, Chengdu University, Chengdu 610106, China
| | - Xiaodong Zhu
- School of Mechanical Engineering, Chengdu University, Chengdu 610106, China
- College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610051, China
| | - Wei Feng
- School of Mechanical Engineering, Chengdu University, Chengdu 610106, China
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Zhang B, Wang H, Luo J, Liu S, Tian Y. Anatase W-doped TiO2 Nanocrystals with improved Mg2+-excited electrochromic properties. J Electroanal Chem (Lausanne) 2023. [DOI: 10.1016/j.jelechem.2023.117159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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Din MI, Khalid R, Hussain Z, Arshad M, Khan SA. A critical review on application of organic, inorganic and hybrid nanophotocatalytic assemblies for photocatalysis of methyl orange dye in aqueous medium. REV CHEM ENG 2022. [DOI: 10.1515/revce-2022-0026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Abstract
Methyl orange (MO) is a highly carcinogenic and harmful contaminant, which has been extensively reported for its detrimental impact on human and aquatic life. The photodegradation of MO into less toxic products has gained much attention over the past few decades. Herein we have reviewed the recent advancement in designing of nanomaterials (NMs) stabilized on different fabricating assemblies and their application in photocatalysis of MO dye. These photocatalytic systems possess various advantages and disadvantages. Graphene-based supported materials on different NMs are highly reported photocatalysts for photocatalysis of MO dye. Recent advancement, parameters affecting photocatalytic studies, kinetics and photocatalytic mechanism of MO have been thoroughly explained in this review. Future outcomes are also provided for extending the development of scientific research in this field.
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Affiliation(s)
| | - Rida Khalid
- School of Chemistry , University of Punjab , Lahore , 54590 , Pakistan
| | - Zaib Hussain
- School of Chemistry , University of Punjab , Lahore , 54590 , Pakistan
| | - Muhammad Arshad
- Institute of Chemistry , The Islamia University of Bahawalpur, Baghdad-ul-Jadeed Campus , Bahawalpur , 63100 , Pakistan
| | - Safyan A. Khan
- Center of Research Excellence in Nanotechnology , King Fahd University of Petroleum & Minerals , Dhahran , 31261 , Saudi Arabia
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Ruíz-Baltazar ÁDJ, Reyes-López SY, Zamora Antuñano MA, Pérez R. Application of modified silicates with gold nanoparticles on environmental remediation: Study of non-linear kinetic adsorption models focused on heavy metals. INORG CHEM COMMUN 2022. [DOI: 10.1016/j.inoche.2022.109899] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Mineral-Supported Photocatalysts: A Review of Materials, Mechanisms and Environmental Applications. ENERGIES 2022. [DOI: 10.3390/en15155607] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Although they are of significant importance for environmental applications, the industrialization of photocatalytic techniques still faces many difficulties, and the most urgent concern is cost control. Natural minerals possess abundant chemical inertia and cost-efficiency, which is suitable for hybridizing with various effective photocatalysts. The use of natural minerals in photocatalytic systems can not only significantly decrease the pure photocatalyst dosage but can also produce a favorable synergistic effect between photocatalyst and mineral substrate. This review article discusses the current progress regarding the use of various mineral classes in photocatalytic applications. Owing to their unique structures, large surface area, and negatively charged surface, silicate minerals could enhance the adsorption capacity, reduce particle aggregation, and promote photogenerated electron-hole pair separation for hybrid photocatalysts. Moreover, controlling the morphology and structure properties of these materials could have a great influence on their light-harvesting ability and photocatalytic activity. Composed of silica and alumina or magnesia, some silicate minerals possess unique orderly organized porous or layered structures, which are proper templates to modify the photocatalyst framework. The non-silicate minerals (referred to carbonate and carbon-based minerals, sulfate, and sulfide minerals and other special minerals) can function not only as catalyst supports but also as photocatalysts after special modification due to their unique chemical formula and impurities. The dye-sensitized minerals, as another natural mineral application in photocatalysis, are proved to be superior photocatalysts for hydrogen evolution and wastewater treatment. This work aims to provide a complete research overview of the mineral-supported photocatalysts and summarizes the common synergistic effects between different mineral substrates and photocatalysts as well as to inspire more possibilities for natural mineral application in photocatalysis.
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