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Wang J, Pi H, Zhao P, Zhou N. Efficient removal of methyl orange and ciprofloxacin by reusable Eu-TiO 2/PVDF membranes with adsorption and photocatalysis methods. RSC Adv 2024; 14:18432-18443. [PMID: 38860257 PMCID: PMC11163413 DOI: 10.1039/d4ra02962c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2024] [Accepted: 06/03/2024] [Indexed: 06/12/2024] Open
Abstract
The presence of methyl orange (MO) and ciprofloxacin (CIP) in wastewater poses a serious threat to the environment and human health. Titanium dioxide nanoparticles (TiO2 NPs) are widely studied as photocatalysts for wastewater treatment. However, TiO2 NPs have the drawbacks of high energy required for activation, fast electron-hole pair recombination and difficulty in recovering from water. To overcome these problems, europium decorated titanium dioxide/poly(vinylidene fluoride) (Eu-TiO2/PVDF) membranes were successful prepared in this work by combining the modified sol-gel method and the immersion phase inversion method. The Eu-TiO2/PVDF membranes obtained with the increase of Eu-TiO2 NPs content during the preparation process were named M1, M2 and M3, respectively. The pure PVDF membrane without the addition of Eu-TiO2 NPs was named M0, which was prepared by the immersion phase inversion method and served as a reference. The prepared Eu-TiO2/PVDF membranes could not only adsorb MO, but also degrade CIP under visible-light irradiation. Moreover, the Eu-TiO2/PVDF membranes exhibited adsorption-photocatalytic activity towards a mixture of MO and CIP under visible-light irradiation. Last but not the least, the Eu-TiO2/PVDF membranes exhibited excellent recyclability and reusability, opening the avenue for a possible use of these membranes in sewage-treatment plants.
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Affiliation(s)
- Jiao Wang
- Northwest Institute for Non-ferrous Metal Research Xi'an 710016 Shaanxi P. R. China
| | - Hemu Pi
- Northwest Institute for Non-ferrous Metal Research Xi'an 710016 Shaanxi P. R. China
| | - Panchao Zhao
- Northwest Institute for Non-ferrous Metal Research Xi'an 710016 Shaanxi P. R. China
| | - Na Zhou
- Northwest Institute for Non-ferrous Metal Research Xi'an 710016 Shaanxi P. R. China
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2
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Rani M, Yadav J, Shanker U, Wang C. Recent updates on remediation approaches of environmentally occurring pollutants using visible light-active nano-photocatalysts. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:22258-22283. [PMID: 38418782 DOI: 10.1007/s11356-024-32455-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Accepted: 02/08/2024] [Indexed: 03/02/2024]
Abstract
Photocatalysis emerges as a potential remedy for the issue of an unreliable light source. Recognized as the most dependable and potent energy source sustaining life on Earth, sunlight offers a promising solution. Sunlight is abundant and free, operational costs associated with running photocatalytic system using nanoparticles are often lower compared to system relying on artificial light source. The escalating problem of water pollution, particularly in highly industrialized nations, necessitates effective wastewater treatment methods. These methods aim to combat elevated pollution levels, encompassing pharmaceuticals, dyes, flame retardants, and pesticide components. Advanced oxidation processes within photocatalytic wastewater treatment exhibit substantial promise for removing complex organic pollutants. Doped nanomaterials, with their enhanced properties, enable efficient utilization of light. Coupled nanomaterials present significant potential in addressing both water and energy challenges by proficiently eliminating persistent pollutants from environment. Photocatalysis when exposed to sunlight can absorb photons and generate e- h + pairs. This discussion briefly outlines the wastewater treatment facilitated by interconnected nanomaterials, emphasizing their role in water-energy nexus. In exploring the capabilities of components within a functional photocatalyst, a comprehensive analysis of both simple photocatalysts and integrated photocatalytic systems is undertaken. Review aims to provide detailed explanation of the impact of light source on photon generation and significance of solar light on reaction kinetics, considering various parameters such as catalyst dosage, pH, temperature, and types of oxidants. By shedding light on these aspects, this review seeks to enhance our understanding of intricate processes involved in photocatalysis and its potential applications in addressing contemporary environmental challenges.
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Affiliation(s)
- Manviri Rani
- Department of Chemistry, Malaviya National Institute of Technology Jaipur, Jaipur, Rajasthan, 302017, India
| | - Jyoti Yadav
- Department of Chemistry, Malaviya National Institute of Technology Jaipur, Jaipur, Rajasthan, 302017, India
| | - Uma Shanker
- Department of Chemistry, Dr B R Ambedkar National Institute of Technology, Jalandhar, Punjab, India, 144027.
| | - Chongqing Wang
- School of Chemical Engineering, Zhengzhou University, Zhengzhou, 450001, China
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Bahadorirad E, Maghsoudi S, Jalali E. Preparation of nanostructured photocatalyst ZnSnO 3@S-doped g-C 3N 4 and its use in DB1 dye degradation through photocatalytic ozonation process. Heliyon 2024; 10:e25451. [PMID: 38352774 PMCID: PMC10861992 DOI: 10.1016/j.heliyon.2024.e25451] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Revised: 01/21/2024] [Accepted: 01/26/2024] [Indexed: 02/16/2024] Open
Abstract
This study aimed to investigate the potential of the photocatalytic ozonation process (PCO) for decolorizing DB1(direct blue) dye, a commonly used dye in the textile industry known for its resistance to removal from wastewater. To address this challenge, a ZnSnO3@S-doped g-C3N4 nano photocatalyst was synthesized using a simple hydrothermal method. In a novel approach, a light/O3/ZnSnO3@S-doped g-C3N4 system was employed for the first time to degrade the DB1 dye. BET analysis indicated that the synthesized catalyst exhibited the fifth type of isotherm, typically associated with materials containing mesopores. Under optimized conditions, the PCO process achieved complete decolorization of 70 ppm DB1 dye within just 15 min at a temperature of 25 °C, a gas flow rate of 2.83 ml/s, and a catalyst dosage of 0.003 g, encompassing both removal and photocatalytic contributions. Importantly, the catalyst demonstrated excellent stability and could be reused up to five times. These findings highlight the promising potential of the light/O3/ZnSnO3@S-doped g-C3N4 system in effectively decolorizing DB1 dye, overcoming its resistance, and addressing an important challenge faced by the textile industry in wastewater treatment. The formative nature of this study provides valuable insights into the development of advanced oxidation processes for efficient dye removal.
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Affiliation(s)
- Elaheh Bahadorirad
- Department of Chemistry, Shahid Bahonar University of Kerman, Kerman, Iran, P.O. Box 76169-133, Kerman, Iran
- Young Researchers Society, Shahid Bahonar University of Kerman, Kerman, Iran, P.O. Box 76175-133, Kerman, Iran
| | - Shahab Maghsoudi
- Department of Chemistry, Shahid Bahonar University of Kerman, Kerman, Iran, P.O. Box 76169-133, Kerman, Iran
| | - Elham Jalali
- Department of Chemistry, Shahid Bahonar University of Kerman, Kerman, Iran, P.O. Box 76169-133, Kerman, Iran
- Young Researchers Society, Shahid Bahonar University of Kerman, Kerman, Iran, P.O. Box 76175-133, Kerman, Iran
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Tshangana CS, Muleja AA, Kuvarega AT, Mamba BB. The synergistic effect of peracetic acid activated by graphene oxide quantum dots in the inactivation of E. coli and organic dye removal with LED reactor light. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART A, TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING 2022; 57:268-281. [PMID: 35354352 DOI: 10.1080/10934529.2022.2056385] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Revised: 03/08/2022] [Accepted: 03/08/2022] [Indexed: 06/14/2023]
Abstract
This study presents a low-impact process that uses the synergy of peracetic acid (PAA) and graphene oxide quantum GQDs to degrade poorly biodegradable organic compounds and potentially substitute chlorination in wastewater treatment. The role of GQDs in GQDs/PAA activity and the effect of GQDs loading were examined. The results showed that increasing GQDs loading in the GQDs/PAA system greatly improved the photodegradation efficiency. Conversely, increasing the PAA concentration slightly enhanced efficiency due to few active sites being available. GQDs acted as catalysts and radical scavenging experiments confirmed that the degradation occurred via generation of hydroxyl (•OH) and peroxy (CH3C(=O)OO•)) radicals. A probable degradation mechanism of the organic dye was presented based on the reaction by-products detected after HPLC-MS studies. The E. coli inactivation mechanism was elucidated by monitoring the morphological changes of E. coli using scanning microscopy. The proposed antimicrobial mechanism includes the initial diffusion of PAA through the cell membrane which caused damage and induced cellular matter leakage, resulting in cell death. Bacterial regrowth studies confirmed GQDs/PAA were able to bypass the natural mechanisms of microorganisms that enables them to repair any damages in their DNA.
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Affiliation(s)
- Charmaine Sesethu Tshangana
- Institute for Nanotechnology and Water Sustainability, College of Science, Engineering and Technology, University of South Africa, Florida Park, Roodepoort, South Africa
| | - Adolph Anga Muleja
- Institute for Nanotechnology and Water Sustainability, College of Science, Engineering and Technology, University of South Africa, Florida Park, Roodepoort, South Africa
| | - Alex Tawanda Kuvarega
- Institute for Nanotechnology and Water Sustainability, College of Science, Engineering and Technology, University of South Africa, Florida Park, Roodepoort, South Africa
| | - Bhekie Brilliance Mamba
- Institute for Nanotechnology and Water Sustainability, College of Science, Engineering and Technology, University of South Africa, Florida Park, Roodepoort, South Africa
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Elumalai N, Prabhu S, Selvaraj M, Silambarasan A, Navaneethan M, Harish S, Ramu P, Ramesh R. Enhanced photocatalytic activity of ZnO hexagonal tube/r-GO composite on degradation of organic aqueous pollutant and study of charge transport properties. CHEMOSPHERE 2022; 291:132782. [PMID: 34748798 DOI: 10.1016/j.chemosphere.2021.132782] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2021] [Revised: 10/11/2021] [Accepted: 11/02/2021] [Indexed: 06/13/2023]
Abstract
ZnO hexagonal tube and ZnO/r-GO nanocomposites were synthesized by hydrothermal method and the nanostructures were characterized by XRD, UV-DRS, PL, FTIR, FESEM, and TEM techniques. The main violet emission peak of the synthesized nanostructures is due to the transition between interstitial zinc and hole (valence band) of ZnO. The potential of ZnO/r-GO nanocomposite was evaluated using methyl orange (MO) and rhodamine-B (RhB), and the results were compared with the activity of synthesized ZnO nanostructures. More than 95% of MO and RhB were by ZnO/r-GO nanocomposite and it was found to be higher than that of ZnO hexagonal tube. The degradation MO and RhB were found to follow first-order kinetics and it has a rate constant of 7.68 × 10-2and 7.83 × 10-2 min-1, respectively. These results are mainly due to the enhanced charge transport property. Trapping experiments show that superoxide radical anion and hydroxide radicals are chief species responsible for the degradation of MO and RhB. The chemical stability of the nanocomposite was evaluated by cycle test experiments and it reveals that the catalyst can be reused up to few cycles without considerable loss of photocatalytic activity. This work affords a simple stratagem to integrate ZnO hexagonal tubes and r-GO nanosheets to construct effective catalysts for the degradation of organic compounds.
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Affiliation(s)
- N Elumalai
- Department of Physics, Government Arts College (Autonomous), Salem, 7, Tamil Nadu, India; Department of Physics, Periyar University, Salem, 11, Tamil Nadu, India
| | - S Prabhu
- Department of Physics, Periyar University, Salem, 11, Tamil Nadu, India
| | - M Selvaraj
- Department of Chemistry, Faculty of Science, King Khalid University, Abha, 61413, Saudi Arabia.
| | - A Silambarasan
- Department of Chemistry, Vivekanandha College of Arts and Sciences for Women (Autonomous), Elayampalayam, Namakkal, 637 205, Tamil Nadu, India.
| | - M Navaneethan
- Nanotechnology Research Centre, SRM Institute of Science and Technology, Kanchepuram, Tamil Nadu, India; Department of Physics and Nanotechnology, SRM Institute of Science and Technology, Kanchepuram, Tamil Nadu, India.
| | - S Harish
- Department of Physics and Nanotechnology, SRM Institute of Science and Technology, Kanchepuram, Tamil Nadu, India
| | - P Ramu
- Department of Physics, Government Arts College (Autonomous), Salem, 7, Tamil Nadu, India.
| | - R Ramesh
- Department of Physics, Periyar University, Salem, 11, Tamil Nadu, India.
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6
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Nanocomposite of CeVO4/BiVO4 Loaded on Reduced Graphene Oxide for the Photocatalytic Degradation of Methyl Orange. J CLUST SCI 2021. [DOI: 10.1007/s10876-021-02189-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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7
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Li L, Zhai L, Liu H, Li B, Li M, Wang B. A novel H2O2photoelectrochemical sensor based on ternary RGO/Ag-TiO2 nanotube arrays nanocomposite. Electrochim Acta 2021. [DOI: 10.1016/j.electacta.2021.137851] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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8
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González Rodríguez LM, Pinedo Escobar JA, Piedra López JG, De Haro Del Rio DA, Suarez Vázquez SI, Carrillo Martínez CJ, Solis CG, Chulim AC. Synthesis, characterization and photocatalytic activity evaluation of WO3, TiO2 and WO3/TiO2 supported on zeolite faujasite. INTERNATIONAL JOURNAL OF CHEMICAL REACTOR ENGINEERING 2020. [DOI: 10.1515/ijcre-2020-0095] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractThe present investigation is focused on the preparation, characterization, and photocatalytic activity evaluation of TiO2/zeolite, WO3/zeolite, WO3/TiO2/zeolite, and WO3/TiO2 composites. Zeolite fujasite (FAU) was synthesized by the hydrothermal method, while the semiconductor/zeolite composites by a straightforward physical mixture and calcination treatment. The photocatalytic activity of the materials was evaluated through the methyl orange (MO) degradation under near-UV irradiation (365 nm). The photocatalysts were characterized by X-ray diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscope (SEM), Energy-dispersive X-ray Spectroscopy (EDX), UV–vis diffuse reflectance spectroscopy and nitrogen physisorption. Results indicated that TiO2, WO3, and Zeolite Y kept their crystalline phases after the preparation method. TiO2 and WO3 particles were distributed on zeolite surface. Also, no significant changes in the band gap energies of the photocatalysts were found. The surface area of zeolite FAU decreased with the addition of TiO2 and WO3. The best MO degradation under near-UV irradiation was obtained with WO3/TiO2 heterojunction and TiO2 P25, no synergistic effect was found between semiconductors and zeolite FAU. Additionally, the kinetic data of the photocatalytic elimination of MO with all photocatalysts under near-UV radiation was investigated with several models: Zero-order, First-Order, Second Order, Modified Freundlich and Parabolic Diffusion, they were consistent with Modified Freundlich model. The effect of initial pH and photocatalyst weight was explored for TiO2/Zeolite composite and it was found that the best MO degradation was obtained at natural pH of 10.3 and 0.2 g of composite was the optimal amount of photocatalyst. Finally, the positive hole formation in all photocatalysts was detected by UV–vis spectroscopy and it was discovered that the highest density of positive holes was obtained with TiO2/zeolite composite.
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Affiliation(s)
- Luis Mario González Rodríguez
- Unidad Profesional Interdisciplinaria de Ingeniería Campus Zacatecas, Instituto Politécnico Nacional, Blvd. El Bote s/n Cerro del Gato, Ejido La Escondida, Col. Cd Administrativa, Zacatecas, 98160, México
| | - José Alfonso Pinedo Escobar
- Unidad Académica de Ciencias Químicas, Universidad Autónoma de Zacatecas, Campus Siglo XXI Edificio 6, Carr. a Gdl km 6.0, Ejido La Escondida, Zacatecas, 98160, México
| | - Jessica Guadalupe Piedra López
- Unidad Profesional Interdisciplinaria de Ingeniería Campus Zacatecas, Instituto Politécnico Nacional, Blvd. El Bote s/n Cerro del Gato, Ejido La Escondida, Col. Cd Administrativa, Zacatecas, 98160, México
| | - David Alejandro De Haro Del Rio
- Universidad Autónoma de Nuevo León, Facultad de Ciencias Químicas, Ave. Universidad S/N, Cd. Universitaria, San Nicolás de los GarzaNL, C.P. 66455, México
| | - Santiago Ivan Suarez Vázquez
- Universidad Autónoma de Nuevo León, Facultad de Ingeniería Civil, Ave. Universidad S/N, Cd. Universitaria, San Nicolás de los GarzaNL, C.P. 66455, México
| | - Cristina Jared Carrillo Martínez
- Unidad Académica de Ciencias Químicas, Universidad Autónoma de Zacatecas, Campus Siglo XXI Edificio 6, Carr. a Gdl km 6.0, Ejido La Escondida, Zacatecas, 98160, México
| | - Christian Gomez Solis
- Universidad de Guanajuato, División de Ciencias e Ingeniería, León, Guanajuato, 37150, Mexico
| | - Alvaro Can Chulim
- Universidad Autónoma de Nayarit, Unidad Académica de Agricultura, Carr. Tepic-Compostela km 9.Xalisco, Tepic, Nayarit, 63155, México
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9
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Zhang M, Xiong J, Yang H, Wen Z, Chen R, Cheng G. Surface Potential/Wettability and Interface Charge Transfer Engineering of Copper-Oxide (Cu–MO x, M = W, Ti, and Ce) Hybrids for Efficient Wastewater Treatment through Adsorption–Photocatalysis Synergy. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.0c02663] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Mengmeng Zhang
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Donghu New & High Technology Development Zone, Wuhan 430205, P. R. China
| | - Jinyan Xiong
- College of Chemistry and Chemical Engineering, Hubei Key Laboratory of Biomass Fibers and Ecodyeing & Finishing, Wuhan Textile University, Wuhan 430200, P. R. China
| | - Hao Yang
- School of Environmental Ecology and Biological Engineering, Donghu New & High Technology Development Zone, Wuhan 430205, P. R. China
| | - Zhipan Wen
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Donghu New & High Technology Development Zone, Wuhan 430205, P. R. China
| | - Rong Chen
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Donghu New & High Technology Development Zone, Wuhan 430205, P. R. China
- Henan Institute of Advanced Technology, Zhengzhou University, Zhengzhou 450002, P. R. China
| | - Gang Cheng
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Donghu New & High Technology Development Zone, Wuhan 430205, P. R. China
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Altaf S, Haider A, Naz S, Ul-Hamid A, Haider J, Imran M, Shahzadi A, Naz M, Ajaz H, Ikram M. Comparative Study of Selenides and Tellurides of Transition Metals (Nb and Ta) with Respect to its Catalytic, Antimicrobial, and Molecular Docking Performance. NANOSCALE RESEARCH LETTERS 2020; 15:144. [PMID: 32643064 PMCID: PMC7343698 DOI: 10.1186/s11671-020-03375-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Accepted: 06/23/2020] [Indexed: 05/13/2023]
Abstract
The present research is a comparative study that reports an economical and accessible method to synthesize niobium (Nb) and Tantalum (Ta) selenides and tellurides with useful application in the removal of pollutants in textile, paper, and dyeing industries as well as in medical field. In this study, solid-state process was used to generate nanocomposites and various characterization techniques were employed to compare two groups of materials under investigation. Structure, morphology, elemental constitution, and functional groups of synthesized materials were analyzed with XRD, FESEM coupled with EDS, FTIR, and Raman spectroscopy, respectively. HR-TEM images displayed nanoscale particles with tetragonal and monoclinic crystal structures. The optical properties were evaluated in terms of cut-off wavelength and optical band gap using UV-visible spectroscopy. A comparative behavior of both groups of compounds was assessed with regards to their catalytic and microcidal properties. Extracted nanocomposites when used as catalysts, though isomorphs of each other, showed markedly different behavior in catalytic degradation of MB dye in the presence of NaBH4 that was employed as a reducing agent. This peculiar deviation might be attributed to slight structural differences between them. Escherichia coli and Staphylococcus aureus (G -ve and + ve bacteria, respectively) were designated as model strains for in vitro antibacterial tests of both clusters by employing disk diffusion method. Superior antibacterial efficacy was observed for telluride system (significant inhibition zones of 26-35 mm) compared with selenide system (diameter of inhibition zone ranged from 0.8 mm to 1.9 mm). In addition, molecular docking study was undertaken to ascertain the binding interaction pattern between NPs and active sites in targeted cell protein. The findings were in agreement with antimicrobial test results suggesting NbTe4 to be the best inhibitor against FabH and FabI enzymes.
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Affiliation(s)
- S Altaf
- Department of Chemistry, University of Engineering and Technology, Lahore, 54000, Pakistan
| | - A Haider
- Department of Clinical Medicine and Surgery, University of Veterinary and Animal Sciences, Lahore, Punjab, 54000, Pakistan
| | - S Naz
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308, China
| | - A Ul-Hamid
- Center for Engineering Research, Research Institute, King Fahd University of Petroleum & Minerals, Dhahran, 31261, Saudi Arabia
| | - J Haider
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308, China
| | - M Imran
- State key Laboratory of Chemical Resource Engineering, Beijing Advanced Innovation Centre for Soft Matter Science and Engineering, Beijing Engineering Center for Hierarchical Catalysts, Beijing University of Chemical Technology, Beijing, 100029, China
| | - A Shahzadi
- University College of Pharmacy, University of the Punjab, Lahore, 54000, Pakistan
| | - M Naz
- Biochemistry Lab, Department of Chemistry, Government College University, Lahore, Punjab, 54000, Pakistan
| | - H Ajaz
- Department of Chemistry, University of Engineering and Technology, Lahore, 54000, Pakistan
| | - M Ikram
- Solar Cell Applications Research Lab, Department of Physics, Government College University, Lahore, Punjab, 54000, Pakistan.
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11
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Altaf S, Ajaz H, Imran M, Ul-Hamid A, Naz M, Aqeel M, Shahzadi A, Shahbaz A, Ikram M. Synthesis and characterization of binary selenides of transition metals to investigate its photocatalytic, antimicrobial and anticancer efficacy. APPLIED NANOSCIENCE 2020. [DOI: 10.1007/s13204-020-01350-w] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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12
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Enhanced removal of various dyes from aqueous solutions by UV and simulated solar photocatalysis over TiO2/ZnO/rGO composites. Sep Purif Technol 2020. [DOI: 10.1016/j.seppur.2019.115962] [Citation(s) in RCA: 120] [Impact Index Per Article: 30.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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13
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Romero FJ, Rivadeneyra A, Becherer M, Morales DP, Rodríguez N. Fabrication and Characterization of Humidity Sensors Based on Graphene Oxide-PEDOT:PSS Composites on a Flexible Substrate. MICROMACHINES 2020; 11:E148. [PMID: 32013153 PMCID: PMC7074611 DOI: 10.3390/mi11020148] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/26/2019] [Revised: 01/20/2020] [Accepted: 01/27/2020] [Indexed: 12/14/2022]
Abstract
In this paper, we present a simple, fast, and cost-effective method for the large-scale fabrication of high-sensitivity humidity sensors on flexible substrates. These sensors consist of a micro screen-printed capacitive structure upon which a sensitive layer is deposited. We studied two different structures and three different sensing materials by modifying the concentration of poly(3,4-ethylenedioxythiophene)/polystyrene sulfonate (PEDOT:PSS) in a graphene oxide (GO) solution. The results show that the aggregation of the PEDOT:PSS to the GO can modify its electrical properties, boosting the performance of the capacitive sensors in terms of both resistive losses and sensitivity to relative humidity (RH) changes. Thus, in an area less than 30 mm2, the GO/PEDOT:PSS-based sensors can achieve a sensitivity much higher (1.22 nF/%RH at 1 kHz) than other similar sensors presented in the literature which, together with their good thermal stability, time response, and performance over bending, demonstrates that the manufacturing approach described in this work paves the way for the mass production of flexible humidity sensors in an inexpensive way.
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Affiliation(s)
- Francisco J. Romero
- Pervasive Electronics Advanced Research Laboratory, University of Granada, 18071 Granada, Spain;
- Department of Electronics and Computer Technology, University of Granada, 18071 Granada, Spain;
| | - Almudena Rivadeneyra
- Pervasive Electronics Advanced Research Laboratory, University of Granada, 18071 Granada, Spain;
- Department of Electronics and Computer Technology, University of Granada, 18071 Granada, Spain;
| | - Markus Becherer
- Chair of Nanoelectronics, Technical University of Munich, 80333 München, Germany;
| | - Diego P. Morales
- Department of Electronics and Computer Technology, University of Granada, 18071 Granada, Spain;
- Biochemistry and Electronics as Sensing Technologies Group, University of Granada, 18071 Granada, Spain
| | - Noel Rodríguez
- Pervasive Electronics Advanced Research Laboratory, University of Granada, 18071 Granada, Spain;
- Department of Electronics and Computer Technology, University of Granada, 18071 Granada, Spain;
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Boruah B, Gupta R, Modak JM, Madras G. Enhanced photocatalysis and bacterial inhibition in Nb 2O 5 via versatile doping with metals (Sr, Y, Zr, and Ag): a critical assessment. NANOSCALE ADVANCES 2019; 1:2748-2760. [PMID: 36132720 PMCID: PMC9418613 DOI: 10.1039/c9na00305c] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2019] [Accepted: 05/30/2019] [Indexed: 05/18/2023]
Abstract
Unique optical properties render semiconductor Nb2O5 nanoparticles suitable for light harvesting and photocatalytic applications. This study focuses on determining optical properties such as the band gap, conduction band edge, valence band edge and work function of as-prepared solution combustion synthesized Nb2O5 nanoparticles with the help of UV-vis Diffuse Reflectance spectroscopy (DRS) and ultraviolet photoelectron spectroscopy (UPS) techniques. Phase purity and the oxidation states of the elements present in the material were confirmed from X-ray diffraction (XRD) patterns and X-ray photoelectron spectra (XPS), respectively. Doping semiconductors with different metal ions impacts the activity of the material, and therefore efforts were made to understand the effect on the photocatalytic performance of Nb2O5 due to the incorporation of metal dopants viz. Sr, Y, Zr, and Ag. Lattice parameters were obtained from Rietveld refinement of the XRD patterns. Parameters which are closely related to the photoactivity of the catalysts such as the presence of surface defects, oxygen vacancies, surface area, and charge carrier dynamics were determined from photoluminescence (PL) analysis, Brunauer-Emmett-Teller (BET) surface area measurements and time-resolved fluorescence (TRF) analysis respectively. In addition, the dopant concentrations were optimised for enhanced photocatalytic activity. The doped Nb2O5 nanoparticles showed significant activity towards targeted degradation of organic pollutants like 2-chlorophenol (2-CP) and dye contaminants like methylene blue (MB), orange G (OG) and indigo carmine (IC). This strategy yielded a robust response towards inactivation of E. coli and S. aureus as well. Adsorption and photodegradation of MB followed Lagergren's pseudo 1st order reaction model and the Langmuir Hinshelwood model respectively. Bacterial inactivation and OG, IC and 2-CP photodegradation followed 1st order kinetics. The reusability of the catalyst for 5 cycles was demonstrated. Finally, a plausible mechanism is proposed based on radical trapping experiments and combined analysis of the characterization techniques.
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Affiliation(s)
- Bhanupriya Boruah
- Department of Chemical Engineering, Indian Institute of Science Bangalore 560012 India +91 80 23600683 +91 80 22932321
| | - Rimzhim Gupta
- Department of Chemical Engineering, Indian Institute of Science Bangalore 560012 India +91 80 23600683 +91 80 22932321
| | - Jayant M Modak
- Department of Chemical Engineering, Indian Institute of Science Bangalore 560012 India +91 80 23600683 +91 80 22932321
| | - Giridhar Madras
- Department of Chemical Engineering, Indian Institute of Science Bangalore 560012 India +91 80 23600683 +91 80 22932321
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15
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Abstract
In this work, we employed a step-by-step sol-gel process to controllably deposit ultra-thin layers of SiO2 on anatase nanoparticles in the range between 0 and 1 nm. The deposition was confirmed by TEM, EDX, and ATR-FTIR (e.g., Ti-O-Si band at 960 cm-1). Zeta potential measurements unravelled a continuous change in surface charge density with increasing silica shell thickness. The photocatalysts were evaluated towards adsorption and degradation of positively-charged and negatively-charged dyes (methylene blue, methyl orange) under UV illumination. The growth mechanism follows the Stranski–Krastanov model with three thickness regimes: (a) Flat islands (first step), (b) mono/bilayers (second/third step), and (c) regular thick films (fourth/fifth step). The results suggest different rate limiting processes for these regimes: (a) For the thinnest scenario, acidic triple-phase boundaries (TPBs) increase the activity for both dyes with their accessibility being the rate limiting step; (b) for continuous mono/bilayers, dye adsorption on the negatively-charged SiO2 shells becomes the rate liming step, which leads to a stark increase in activity for the positively-charged MB and a decrease for MO; (c) for thicker shells, the activity decreases for both dyes and is limited by the charge transport through the isolating shells.
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16
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Synthesis, characterization and photocatalytic activity evaluation of TiO2 – ZnO nanocomposites: Elucidating effect of varying Ti:Zn molar ratio. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2018.12.053] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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17
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Stucchi M, Elfiad A, Rigamonti M, Khan H, Boffito DC. Water treatment: Mn-TiO 2 synthesized by ultrasound with increased aromatics adsorption. ULTRASONICS SONOCHEMISTRY 2018; 44:272-279. [PMID: 29680612 DOI: 10.1016/j.ultsonch.2018.01.023] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Revised: 01/16/2018] [Accepted: 01/26/2018] [Indexed: 05/20/2023]
Abstract
Pharma-products are mostly single or multiple cyclic compounds. They pollute surface water and are persistent in the aquatic ecosystem. When irradiated by UV light, TiO2 catalysts cleave or degrade organic contaminants in water. Removal of organics by photocatalysis results from a synergistic effect of adsorption and photocatalysis. Synthesis of catalysts by ultrasound (US) produces high surface area and porous solids. Here, we synthesized Mn-doped TiO2 with a US-assisted sol-gel method. Compared to the classical synthesis, US increased the BET surface area from 83 m2 g-1 to 90 m2 g-1 in the Mn-TiO2 sample and from 9.0 m2 g-1 to 53 m2 g-1 in the control TiO2. Accordingly, acetaminophen and amoxicillin adsorption increased from 44% to 52%, and from 34% to 94% for the Mn-TiO2 obtained in absence and presence of US, respectively. When in a mixture, the two drugs strongly compete for adsorption on TiO2.
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Affiliation(s)
- M Stucchi
- Polytechnique Montréal, Department of Chemical Engineering, 2900 boul. Édouard-Montpetit, 2500 chemin de Polytechnique, Montréal, Québec H3T 1J4, Canada
| | - A Elfiad
- Polytechnique Montréal, Department of Chemical Engineering, 2900 boul. Édouard-Montpetit, 2500 chemin de Polytechnique, Montréal, Québec H3T 1J4, Canada; Université des Sciences et de la Technologie Houari Boumediene, Department of Applied Organic Chemistry, BP 32 El Alia, 16111 Bab Ezzouar, Alger, Algeria
| | - M Rigamonti
- Polytechnique Montréal, Department of Chemical Engineering, 2900 boul. Édouard-Montpetit, 2500 chemin de Polytechnique, Montréal, Québec H3T 1J4, Canada
| | - H Khan
- Polytechnique Montréal, Department of Chemical Engineering, 2900 boul. Édouard-Montpetit, 2500 chemin de Polytechnique, Montréal, Québec H3T 1J4, Canada
| | - D C Boffito
- Polytechnique Montréal, Department of Chemical Engineering, 2900 boul. Édouard-Montpetit, 2500 chemin de Polytechnique, Montréal, Québec H3T 1J4, Canada.
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18
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Nzaba SKM, Ntsendwana B, Mamba BB, Kuvarega AT. PAMAM templated N,Pt co-doped TiO 2 for visible light photodegradation of brilliant black. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:15146-15158. [PMID: 29560589 DOI: 10.1007/s11356-018-1717-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2017] [Accepted: 03/09/2018] [Indexed: 06/08/2023]
Abstract
This study examined the photocatalytic degradation of an azo dye brilliant black (BB) using non-metal/metal co-doped TiO2. N,Pt co-doped TiO2 photocatalysts were prepared by a modified sol-gel method using amine-terminated polyamidoamine dendrimer generation 0 (PG0) as a template and source of nitrogen. Structural, morphological, and textural properties were evaluated using scanning electron microscopy coupled to energy-dispersive X-ray spectroscopy (SEM/EDX), high-resolution transmission electron microscopy (HRTEM), X-ray diffraction spectroscopy (XRD), X-ray photoelectron spectroscopy (XPS), thermal gravimetric analysis (TGA), Fourier transform infrared (FTIR), Raman spectroscopy (RS), photoluminescence (PL) and ultra-violet/visible spectroscopy (UV-Vis). The synthesized photocatalysts exhibited lower band gap energies as compared to the Degussa P-25, revealing a red shift in band gap towards the visible light absorption region. Photocatalytic activity of N,Pt co-doped TiO2 was measured by the reaction of photocatalytic degradation of BB dye. Enhanced photodegradation efficiency of BB was achieved after 180-min reaction time with an initial concentration of 50 ppm. This was attributed to the rod-like shape of the materials, larger surface area, and enhanced absorption of visible light induced by N,Pt co-doping. The N,Pt co-doped TiO2 also exhibited pseudo-first-order kinetic behavior with half-life and rate constant of 0.37 and 0.01984 min-1, respectively. The mechanism of the photodegradation of BB under the visible light irradiation was proposed. The obtained results prove that co-doping of TiO2 with N and Pt contributed to the enhanced photocatalytic performances of TiO2 for visible light-induced photodegradation of organic contaminants for environmental remediation. Therefore, this work provides a new approach to the synthesis of PAMAM templated N,Pt co-doped TiO2 for visible light photodegradation of brilliant black.
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Affiliation(s)
- Sarre Kadia Myra Nzaba
- Nanotechnology and Water Sustainability (NanoWS) Research Unit, College of Science, Engineering and Technology (CSET), University of South Africa (UNISA), Science Campus, Florida, South Africa
| | - Bulelwa Ntsendwana
- Nanotechnology and Water Sustainability (NanoWS) Research Unit, College of Science, Engineering and Technology (CSET), University of South Africa (UNISA), Science Campus, Florida, South Africa.
| | - Bhekie Brilliance Mamba
- Nanotechnology and Water Sustainability (NanoWS) Research Unit, College of Science, Engineering and Technology (CSET), University of South Africa (UNISA), Science Campus, Florida, South Africa
| | - Alex Tawanda Kuvarega
- Nanotechnology and Water Sustainability (NanoWS) Research Unit, College of Science, Engineering and Technology (CSET), University of South Africa (UNISA), Science Campus, Florida, South Africa.
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Salimi R, Sabbagh Alvani AA, Naseri N, Du SF, Poelman D. Visible-enhanced photocatalytic performance of CuWO4/WO3 hetero-structures: incorporation of plasmonic Ag nanostructures. NEW J CHEM 2018. [DOI: 10.1039/c8nj01656a] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new plasmonic Ag hybridized CuWO4/WO3 heterostructured nanocomposite was successfully synthesized via a ligand-assisted sol gel method and the photocatalytic activity was evaluated by photo-degradation of methylene blue (MB) under visible light irradiation.
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Affiliation(s)
- R. Salimi
- Color & Polymer Research Center (CPRC)
- Amirkabir University of Technology
- Tehran 158754413
- Iran
- Department of Polymer Engineering and Color Technology
| | - A. A. Sabbagh Alvani
- Color & Polymer Research Center (CPRC)
- Amirkabir University of Technology
- Tehran 158754413
- Iran
- Department of Polymer Engineering and Color Technology
| | - N. Naseri
- Department of Physics
- Sharif University of Technology
- Tehran 11155-9161
- Iran
- Condensed Matter National Laboratory
| | - S. F. Du
- School of Chemical Engineering
- University of Birmingham
- Birmingham
- UK
| | - D. Poelman
- LumiLab
- Department of Solid State Sciences
- Ghent University
- Belgium
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20
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Wang X, Wang J, Zhang J, Louangsouphom B, Song J, Wang X, Zhao J. Synthesis of expanded graphite C/C composites (EGC) based Ni-N-TiO 2 floating photocatalysts for in situ adsorption synergistic photocatalytic degradation of diesel oil. J Photochem Photobiol A Chem 2017. [DOI: 10.1016/j.jphotochem.2017.07.015] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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21
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Immobilization of mixed cobalt/nickel metal-organic framework on a magnetic BiFeO 3 : A highly efficient separable photocatalyst for degradation of water pollutions. J Photochem Photobiol A Chem 2017. [DOI: 10.1016/j.jphotochem.2017.05.041] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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22
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Magnetically recyclable Fe3O4/Bi2S3 microspheres for effective removal of Congo red dye by simultaneous adsorption and photocatalytic regeneration. Sep Purif Technol 2017. [DOI: 10.1016/j.seppur.2016.12.051] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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23
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Design and development of a novel BiFeO 3 /CuWO 4 heterojunction with enhanced photocatalytic performance for the degradation of organic dyes. J Photochem Photobiol A Chem 2017. [DOI: 10.1016/j.jphotochem.2017.02.004] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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24
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Kumar S, Sharma R, Sharma V, Harith G, Sivakumar V, Krishnan V. Role of RGO support and irradiation source on the photocatalytic activity of CdS-ZnO semiconductor nanostructures. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2016; 7:1684-1697. [PMID: 28144518 PMCID: PMC5238663 DOI: 10.3762/bjnano.7.161] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2016] [Accepted: 10/24/2016] [Indexed: 05/30/2023]
Abstract
Photocatalytic activity of semiconductor nanostructures is gaining much importance in recent years in both energy and environmental applications. However, several parameters play a crucial role in enhancing or suppressing the photocatalytic activity through, for example, modifying the band gap energy positions, influencing the generation and transport of charge carriers and altering the recombination rate. In this regard, physical parameters such as the support material and the irradiation source can also have significant effect on the activity of the photocatalysts. In this work, we have investigated the role of reduced graphene oxide (RGO) support and the irradiation source on mixed metal chalcogenide semiconductor (CdS-ZnO) nanostructures. The photocatalyst material was synthesized using a facile hydrothermal method and thoroughly characterized using different spectroscopic and microscopic techniques. The photocatalytic activity was evaluated by studying the degradation of a model dye (methyl orange, MO) under visible light (only) irradiation and under natural sunlight. The results reveal that the RGO-supported CdS-ZnO photocatalyst performs considerably better than the unsupported CdS-ZnO nanostructures. In addition, both the catalysts perform significantly better under natural sunlight than under visible light (only) irradiation. In essence, this work paves way for tailoring the photocatalytic activity of semiconductor nanostructures.
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Affiliation(s)
- Suneel Kumar
- School of Basic Sciences and Advanced Materials Research Center, Indian Institute of Technology Mandi, Kamand, Mandi 175005, H.P., India
| | - Rahul Sharma
- School of Basic Sciences and Advanced Materials Research Center, Indian Institute of Technology Mandi, Kamand, Mandi 175005, H.P., India
- Department of Chemistry, National Institute of Technology, Rourkela, Odisha, India
| | - Vipul Sharma
- School of Basic Sciences and Advanced Materials Research Center, Indian Institute of Technology Mandi, Kamand, Mandi 175005, H.P., India
| | - Gurunarayanan Harith
- School of Basic Sciences and Advanced Materials Research Center, Indian Institute of Technology Mandi, Kamand, Mandi 175005, H.P., India
| | | | - Venkata Krishnan
- School of Basic Sciences and Advanced Materials Research Center, Indian Institute of Technology Mandi, Kamand, Mandi 175005, H.P., India
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25
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Yu H, Xiao P, Tian J, Wang F, Yu J. Phenylamine-Functionalized rGO/TiO 2 Photocatalysts: Spatially Separated Adsorption Sites and Tunable Photocatalytic Selectivity. ACS APPLIED MATERIALS & INTERFACES 2016; 8:29470-29477. [PMID: 27734674 DOI: 10.1021/acsami.6b09903] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The preferential adsorption of targeted contaminants on a photocatalyst surface is highly required to realize its photocatalytic selective decomposition in a complex system. To realize the tunable preferential adsorption, altering the surface charge or polarity property of photocatalysts has widely been reported. However, it is quite difficult for a modified photocatalyst to realize the simultaneously preferential adsorption for both cationic and anionic dyes. In this study, to realize the selective adsorption for both cationic and anionic dyes on a photocatalyst surface, the negative reduced graphene oxide (rGO) nanosheets and positive phenylamine (PhNH2) molecules are successfully loaded on the TiO2 surface (PhNH2/rGO-TiO2) with spatially separated adsorption sites, where the negative rGO and positive PhNH2 molecules work as the preferential adsorption sites for cationic and anionic dyes, respectively. It was interesting to find that although all the TiO2 samples (including the naked TiO2, PhNH2/TiO2, rGO-TiO2, and PhNH2/rGO-TiO2) clearly showed a better adsorption performance for cationic dyes than anionic dyes, only the PhNH2/rGO-TiO2 with spatially separated adsorption-active sites exhibited an opposite photocatalytic selectivity, namely, the naked TiO2, PhNH2/TiO2, and rGO-TiO2 showed a preferential decomposition for cationic dyes, while the resultant PhNH2/rGO-TiO2 exhibited an excellently selective decomposition for anionic dyes. In addition, the resultant PhNH2/rGO-TiO2 photocatalyst not only realizes the tunable photocatalytic selectivity but also can completely and sequentially decompose the opposite cationic and anionic dyes.
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Affiliation(s)
- Huogen Yu
- State Key Laboratory of Silicate Materials for Architectures, ‡School of Chemistry, Chemical Engineering and Life Sciences and §State Key Laboratory of Advanced Technology for Material Synthesis and Processing, Wuhan University of Technology , Wuhan 430070, P. R. China
| | - Pian Xiao
- State Key Laboratory of Silicate Materials for Architectures, ‡School of Chemistry, Chemical Engineering and Life Sciences and §State Key Laboratory of Advanced Technology for Material Synthesis and Processing, Wuhan University of Technology , Wuhan 430070, P. R. China
| | - Jing Tian
- State Key Laboratory of Silicate Materials for Architectures, ‡School of Chemistry, Chemical Engineering and Life Sciences and §State Key Laboratory of Advanced Technology for Material Synthesis and Processing, Wuhan University of Technology , Wuhan 430070, P. R. China
| | - Fazhou Wang
- State Key Laboratory of Silicate Materials for Architectures, ‡School of Chemistry, Chemical Engineering and Life Sciences and §State Key Laboratory of Advanced Technology for Material Synthesis and Processing, Wuhan University of Technology , Wuhan 430070, P. R. China
| | - Jiaguo Yu
- State Key Laboratory of Silicate Materials for Architectures, ‡School of Chemistry, Chemical Engineering and Life Sciences and §State Key Laboratory of Advanced Technology for Material Synthesis and Processing, Wuhan University of Technology , Wuhan 430070, P. R. China
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Zhang F, Chen X, Wu F, Ji Y. High adsorption capability and selectivity of ZnO nanoparticles for dye removal. Colloids Surf A Physicochem Eng Asp 2016. [DOI: 10.1016/j.colsurfa.2016.09.059] [Citation(s) in RCA: 76] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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27
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Arabzadeh A, Salimi A. One dimensional CdS nanowire@TiO2 nanoparticles core-shell as high performance photocatalyst for fast degradation of dye pollutants under visible and sunlight irradiation. J Colloid Interface Sci 2016; 479:43-54. [DOI: 10.1016/j.jcis.2016.06.036] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2016] [Revised: 06/11/2016] [Accepted: 06/13/2016] [Indexed: 11/16/2022]
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28
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Sun Y, Sun Y, Zhang T, Chen G, Zhang F, Liu D, Cai W, Li Y, Yang X, Li C. Complete Au@ZnO core-shell nanoparticles with enhanced plasmonic absorption enabling significantly improved photocatalysis. NANOSCALE 2016; 8:10774-10782. [PMID: 27160795 DOI: 10.1039/c6nr00933f] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Nanostructured ZnO exhibits high chemical stability and unique optical properties, representing a promising candidate among photocatalysts in the field of environmental remediation and solar energy conversion. However, ZnO only absorbs the UV light, which accounts for less than 5% of total solar irradiation, significantly limiting its applications. In this article, we report a facile and efficient approach to overcome the poor wettability between ZnO and Au by carefully modulating the surface charge density on Au nanoparticles (NPs), enabling rapid synthesis of Au@ZnO core-shell NPs at room temperature. The resulting Au@ZnO core-shell NPs exhibit a significantly enhanced plasmonic absorption in the visible range due to the Au NP cores. They also show a significantly improved photocatalytic performance in comparison with their single-component counterparts, i.e., the Au NPs and ZnO NPs. Moreover, the high catalytic activity of the as-synthesized Au@ZnO core-shell NPs can be maintained even after many cycles of photocatalytic reaction. Our results shed light on the fact that the Au@ZnO core-shell NPs represent a promising class of candidates for applications in plasmonics, surface-enhanced spectroscopy, light harvest devices, solar energy conversion, and degradation of organic pollutants.
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Affiliation(s)
- Yiqiang Sun
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, Shandong, P. R. China.
| | - Yugang Sun
- Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122, USA.
| | - Tao Zhang
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, Shandong, P. R. China.
| | - Guozhu Chen
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, Shandong, P. R. China.
| | - Fengshou Zhang
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, Shandong, P. R. China.
| | - Dilong Liu
- Key Laboratory of Material Physics, Anhui Key Lab of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, Anhui, P. R. China.
| | - Weiping Cai
- Key Laboratory of Material Physics, Anhui Key Lab of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, Anhui, P. R. China.
| | - Yue Li
- Key Laboratory of Material Physics, Anhui Key Lab of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, Anhui, P. R. China.
| | - Xianfeng Yang
- Analytical and Testing Center, South China University of Technology, Guangzhou 510640, P. R. China
| | - Cuncheng Li
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, Shandong, P. R. China.
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29
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Zhang P, Mo Z, Wang Y, Han L, Zhang C, Zhao G, Li Z. One-step hydrothermal synthesis of magnetic responsive TiO2nanotubes/Fe3O4/graphene composites with desirable photocatalytic properties and reusability. RSC Adv 2016. [DOI: 10.1039/c6ra03389j] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
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30
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A cost-effective porous carbon derived from pomelo peel for the removal of methyl orange from aqueous solution. Colloids Surf A Physicochem Eng Asp 2016. [DOI: 10.1016/j.colsurfa.2015.10.041] [Citation(s) in RCA: 84] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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31
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Wu JG, Fang T, Cai R, Li SY, Wang Y, Zhao CE, Wei A. Fabrication of an Ag/Fe2O3/ZnO ternary composite with enhanced photocatalytic performance. RSC Adv 2016. [DOI: 10.1039/c5ra20403h] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
A novel Ag/Fe2O3/ZnO ternary composite was fabricated using the chemical deposition and photochemical deposition methods.
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Affiliation(s)
- Jia-gen Wu
- Key Laboratory for Organic Electronics and Information Displays & Institute of Advanced Materials (IAM)
- Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM)
- Nanjing University of Posts & Telecommunications
- Nanjing 210023
- China
| | - Ting Fang
- Key Laboratory for Organic Electronics and Information Displays & Institute of Advanced Materials (IAM)
- Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM)
- Nanjing University of Posts & Telecommunications
- Nanjing 210023
- China
| | - Ran Cai
- Key Laboratory for Organic Electronics and Information Displays & Institute of Advanced Materials (IAM)
- Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM)
- Nanjing University of Posts & Telecommunications
- Nanjing 210023
- China
| | - Shao-yang Li
- Key Laboratory for Organic Electronics and Information Displays & Institute of Advanced Materials (IAM)
- Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM)
- Nanjing University of Posts & Telecommunications
- Nanjing 210023
- China
| | - Yue Wang
- Key Laboratory for Organic Electronics and Information Displays & Institute of Advanced Materials (IAM)
- Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM)
- Nanjing University of Posts & Telecommunications
- Nanjing 210023
- China
| | - Cui-e Zhao
- Key Laboratory for Organic Electronics and Information Displays & Institute of Advanced Materials (IAM)
- Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM)
- Nanjing University of Posts & Telecommunications
- Nanjing 210023
- China
| | - Ang Wei
- Key Laboratory for Organic Electronics and Information Displays & Institute of Advanced Materials (IAM)
- Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM)
- Nanjing University of Posts & Telecommunications
- Nanjing 210023
- China
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32
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Saravanakumar K, Muthuraj V, Vadivel S. Constructing novel Ag nanoparticles anchored on MnO2 nanowires as an efficient visible light driven photocatalyst. RSC Adv 2016. [DOI: 10.1039/c6ra10444d] [Citation(s) in RCA: 80] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
We report the first construction of novel Ag nanoparticles anchored on MnO2 nanowires as an efficient visible light driven photocatalyst.
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Affiliation(s)
| | - V. Muthuraj
- Department of Chemistry
- VHNSN College
- Virudhunagar-626 001
- India
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33
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Peng Y, Wang KK, Yu PP, Liu T, Xu AW. Synthesis of one-dimensional Bi2O2CO3–Bi(OHC2O4)·2H2O heterojunctions with excellent adsorptive and photocatalytic performance. RSC Adv 2016. [DOI: 10.1039/c6ra04014d] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Novel one-dimensional Βi2O2CO3–Βi2(OHC2O4)·2H2O heterostructure photocatalyst exhibits outstanding photocatalytic activity for degrading high concentration RhB, MB and MO dyes, and excellent adsorptive capability to MO dye.
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Affiliation(s)
- Yin Peng
- The Key Laboratory of Functional Molecular Solids
- Ministry of Education
- College of Chemistry and Materials Science
- Anhui Normal University
- Wuhu 241000
| | - Ke Ke Wang
- The Key Laboratory of Functional Molecular Solids
- Ministry of Education
- College of Chemistry and Materials Science
- Anhui Normal University
- Wuhu 241000
| | - Pian-Pian Yu
- The Key Laboratory of Functional Molecular Solids
- Ministry of Education
- College of Chemistry and Materials Science
- Anhui Normal University
- Wuhu 241000
| | - Ting Liu
- The Key Laboratory of Functional Molecular Solids
- Ministry of Education
- College of Chemistry and Materials Science
- Anhui Normal University
- Wuhu 241000
| | - An Wu Xu
- Division of Nanomaterials and Chemistry
- Hefei National Laboratory for Physical Sciences at Microscale
- Department of Chemistry
- University of Science and Technology of China
- Hefei 230026
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34
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Wang S, Yuan X, Bi X, Wang X, Huang Q. Observation of the retarded transportation of a photogenerated hole on epitaxial graphene. Phys Chem Chem Phys 2015; 17:23711-5. [PMID: 26308861 DOI: 10.1039/c5cp03569d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Graphene is usually adopted as an assistant additive for catalysts in photocatalytic processes, because of its ability to accelerate the separation of photogenerated charge carriers. To elucidate the mechanism, hydrogen peroxide is adopted to convert the O2(-)˙ active species into OH˙ for degradation of an organic dye. If the pH value is less than 7, the concentration of the OH˙ species can be reduced more quickly with the addition of graphene than without, because negatively charged electrons can be transported quickly on graphene. If the pH value is larger than 7, the concentration of OH˙ can be promoted by the catalyst SiC with photogenerated h(+) release and reaction with OH(-), however the concentration is reduced if the SiC catalyst is covered by a graphene sheet, as it retards h(+) release from the SiC substrate. Our findings have provided a certification for the role of graphene in photo-catalytic processes.
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Affiliation(s)
- Shujie Wang
- School of Chemical Engineering, Sichuan University, Chengdu 610065, China.
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35
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Kim YJ, Xing X, Choi DY, Hwang CH, Choi C, Kim G, Jin S, Hwang KJ, Park JY. Study of the photocatalytic properties of bio-mimicked hollow SnO2 microstructures synthesized with Ceiba pentandra (L.) Gaertn. (kapok) as a natural template. NEW J CHEM 2015. [DOI: 10.1039/c5nj01375e] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Hollow SnO2 microstructures have been simply fabricated via a template impregnation technique using Ceiba pentandra (L.) Gaertn. as a natural template.
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Affiliation(s)
- Young Jin Kim
- Materials Science and Engineering
- University of California at San Diego
- La Jolla
- USA
| | - Xing Xing
- Department of Nanoengineering
- University of California at San Diego
- La Jolla
- USA
| | | | - Cheol-Ho Hwang
- International Climate and Environment Center
- Gwangju 502-861
- South Korea
| | - Chulmin Choi
- Mechanical and Aerospace Engineering
- University of California at San Diego
- La Jolla
- USA
| | - Gunwoo Kim
- Materials Science and Engineering
- University of California at San Diego
- La Jolla
- USA
| | - Sungho Jin
- Materials Science and Engineering
- University of California at San Diego
- La Jolla
- USA
- Mechanical and Aerospace Engineering
| | - Kyung-Jun Hwang
- Mechanical and Aerospace Engineering
- University of California at San Diego
- La Jolla
- USA
- Advanced Materials and Strategic Planning Division
| | - Ju-Young Park
- Green Energy Institute
- Mokpo-Si 530-400
- Republic of Korea
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36
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Liu Y, Tian Y, Luo C, Cui G, Yan S. One-pot preparation of a MnO2–graphene–carbon nanotube hybrid material for the removal of methyl orange from aqueous solutions. NEW J CHEM 2015. [DOI: 10.1039/c5nj00697j] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The branched hybrid MnO2–graphene–CNT (MnO2–G–CNT) is synthesized and shows excellent adsorption capability for the removal of methyl orange from aqueous solutions.
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Affiliation(s)
- Yan Liu
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Yaxi Tian
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Chao Luo
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
- CNOOC Tianjin Chemical Research & Design Institute
| | - Guijia Cui
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Shiqiang Yan
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
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37
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Zhu Y, Wang Y, Yao W, Zong R, Zhu Y. New insights into the relationship between photocatalytic activity and TiO2–GR composites. RSC Adv 2015. [DOI: 10.1039/c5ra02458g] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Composited graphene cannot enhance the photocatalytic oxidation activity of TiO2, but can improve its photocatalytic reduction activity and photoelectrochemical properties.
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Affiliation(s)
- Yanyan Zhu
- Department of Chemistry
- Beijing Key Laboratory for Analytical Methods and Instrumentation
- Tsinghua University
- Beijing 100084
- P. R. China
| | - Yajun Wang
- State Key Laboratory of Heavy Oil Processing
- China University of Petroleum
- Beijing 102249
- P. R. China
| | - Wenqing Yao
- Department of Chemistry
- Beijing Key Laboratory for Analytical Methods and Instrumentation
- Tsinghua University
- Beijing 100084
- P. R. China
| | - Ruilong Zong
- Department of Chemistry
- Beijing Key Laboratory for Analytical Methods and Instrumentation
- Tsinghua University
- Beijing 100084
- P. R. China
| | - Yongfa Zhu
- Department of Chemistry
- Beijing Key Laboratory for Analytical Methods and Instrumentation
- Tsinghua University
- Beijing 100084
- P. R. China
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38
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Duan Z, Wang Z, Sun C, Zhao L, Wang Y. Facile synthesis of AC@TiO2-S with improved visible light photocatalytic activity and recyclability through a controllable sol–gel approach. RSC Adv 2015. [DOI: 10.1039/c5ra07020a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
AC@TiO2-S prepared by controlled sol–gel approach exhibits improved photocatalytic activity over AC@TiO2-G prepared by sol–gel approach for the degradation of methyl orange under visible light irradiation and has excellent recyclability.
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Affiliation(s)
- Zhiying Duan
- Chemical Engineering Institute
- Northwest University for Nationalities
- Lanzhou 730030
- P. R. China
| | - Zhichao Wang
- Chemical Engineering Institute
- Northwest University for Nationalities
- Lanzhou 730030
- P. R. China
| | - Chufeng Sun
- Chemical Engineering Institute
- Northwest University for Nationalities
- Lanzhou 730030
- P. R. China
| | - Lianbiao Zhao
- Chemical Engineering Institute
- Northwest University for Nationalities
- Lanzhou 730030
- P. R. China
| | - Yanbin Wang
- Chemical Engineering Institute
- Northwest University for Nationalities
- Lanzhou 730030
- P. R. China
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39
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Zhang L, Tian Y, Guo Y, Gao H, Li H, Yan S. Introduction of α-MnO2nanosheets to NH2graphene to remove Cr6+from aqueous solutions. RSC Adv 2015. [DOI: 10.1039/c5ra04545b] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
The planar structure of the designed α-MnO2–NH2–RGO hybrid was prepared and characterized and used to remove hexavalent chromium ions (Cr6+) from aqueous solutions.
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Affiliation(s)
- Li Zhang
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- PR China
| | - Yaxi Tian
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- PR China
| | - Yaopeng Guo
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- PR China
| | - Hui Gao
- College of Life Science
- Lanzhou University
- Lanzhou 730000
- PR China
| | - Haizhen Li
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- PR China
| | - Shiqiang Yan
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- PR China
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40
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Li H, Sun Z, Tian Y, Cui G, Yan S. Facile and cost-effective synthesis of CNT@MCo2O4 (M = Ni, Mn, Cu, Zn) core–shell hybrid nanostructures for organic dye removal. RSC Adv 2015. [DOI: 10.1039/c5ra14748d] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
This study presents four hybrid materials of CNT@MCo2O4 (M = Ni, Mn, Cu, Zn) which were prepared via a simple chemical bath deposition method at room temperature followed by a post-annealing treatment.
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Affiliation(s)
- Haizhen Li
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou
- P.R. China
| | - Zebin Sun
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou
- P.R. China
| | - Yaxi Tian
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou
- P.R. China
| | - Guijia Cui
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou
- P.R. China
| | - Shiqiang Yan
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou
- P.R. China
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41
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Tian Y, Liu Y, Sun Z, Li H, Cui G, Yan S. Fibrous porous silica microspheres decorated with Mn3O4 for effective removal of methyl orange from aqueous solution. RSC Adv 2015. [DOI: 10.1039/c5ra21783k] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
In this work, trimanganese tetraoxide (Mn3O4) functionalized fibrous porous silica microspheres (KCC-1) with well-dispersed and excellent adsorption capacities were successfully synthesized by a simple and mild method for the first time.
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Affiliation(s)
- Yaxi Tian
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Yan Liu
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Zebin Sun
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Haizhen Li
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Guijia Cui
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Shiqiang Yan
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
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