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Shee NK, Park BH, Kim HJ. Hybrid Composite of Sn(IV)-Porphyrin and Mesoporous Structure for Enhanced Visible Light Photocatalytic Degradation of Organic Dyes. Molecules 2023; 28:molecules28041886. [PMID: 36838873 PMCID: PMC9966349 DOI: 10.3390/molecules28041886] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Revised: 02/14/2023] [Accepted: 02/15/2023] [Indexed: 02/18/2023] Open
Abstract
Two hybrid composites (SnP@MCM-41 and SnP@SiO2) were fabricated by chemical adsorption of (trans-dihydroxo)(5,10,15,20-tetraphenylporphyrinato)tin(IV) (SnP) on mesoporous structured Mobil Composition of Matter No. 41 (MCM-41) and SiO2 nanoparticles. These materials were characterized by Fourier-transform infrared spectroscopy, ultraviolet-visible spectroscopy, fluorescence spectroscopy, transmission electron microscopy, and field-emission scanning electron microscopy techniques. The incorporation of SnP into MCM-41 and SiO2 supports efficient photocatalytic degradation of the anionic erioglaucine, cationic rhodamine B, and neutral m-cresol purple dyes under visible light irradiation in an aqueous solution. The performances of degradation of these dyes by these photocatalysts under visible light irradiation varied from 87 to 95%. The pseudo-first-order degradation rate constant of organic dyes for SnP@MCM-41 was higher than those of SnP@SiO2 and SnP. These visible light photocatalysts showed remarkable stability and reliable reusability.
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Janbandhu S, Patra U, Sukhadeve G, Kumar R, Gedam R. Photocatalytic performance of glasses embedded with Ag-TiO2 quantum dots on photodegradation of indigo carmine and eosin Y dyes in sunlight. INORG CHEM COMMUN 2023. [DOI: 10.1016/j.inoche.2022.110317] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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3
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Composite CdS/TiO2 Powders for the Selective Reduction of 4-Nitrobenzaldehyde by Visible Light: Relation between Preparation, Morphology and Photocatalytic Activity. Catalysts 2022. [DOI: 10.3390/catal13010074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
A series of composite CdS/TiO2 powders was obtained by nucleation of TiO2 on CdS nanoseeds. This combination presents the appropriate band edge position for photocatalytic redox reactions: visible light irradiation of CdS allows the injection of electrons into dark TiO2, increasing the lifetimes of separated charges. The electrons have been used for the quantitative photoreduction of 4-nitrobenzaldehyde to 4-aminobenzaldehyde, whose formation was pointed out by 1H NMR and ESI-MS positive ion mode. Concomitant sacrificial oxidation of 2-propanol, which was also the proton source, occurred. The use of characterization techniques (XRD, N2 adsorption-desorption) evidenced the principal factors driving the photocatalytic reaction: the nanometric size of anatase crystalline domains, the presence of dispersed CdS to form an extended active junction CdS/anatase, and the presence of mesopores as nanoreactors. The result is an efficient photocatalytic system that uses visible light. In addition, the presence of TiO2 in combination with CdS improves the stability of the photoactive material, enabling its recyclability.
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Dharman RK, Palanisamy G, Oh TH. Sonocatalytic degradation of ciprofloxacin and organic pollutant by 1T/2H phase MoS 2 in Polyvinylidene fluoride nanocomposite membrane. CHEMOSPHERE 2022; 308:136571. [PMID: 36155013 DOI: 10.1016/j.chemosphere.2022.136571] [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: 08/05/2022] [Revised: 09/13/2022] [Accepted: 09/18/2022] [Indexed: 06/16/2023]
Abstract
The development of recyclable catalysts with effective properties and stable reusability is great importance for the removal of different types of pollutants in wastewater. Herein, we have synthesized Polyvinylidene fluoride (PVDF) polymer and mixed-phase 1T/2H MoS2 for immobilizing the sonocatalyst material. Techniques such as FESEM, XRD, FTIR, XPS, and UV-vis spectra have been used for analyzing the structural, and morphological properties. The formation of a 1T/2H mixed phase in MoS2 has been revealed by XRD and XPS analysis. Consequently, the sonocatalytic performance of the nanocomposite membrane was investigated through ciprofloxacin (CIP) and organic pollutants (Rhodamine B (RhB)). As a result, MoS2/PVDF (PM4) nanocomposite membrane exhibited a superior sonocatalytic activity with 94.37% and 84.37% of RhB and CIP degradation efficiency with pseudo-first-order kinetic constant (k) of 0.0187 min-1, and 0.0044 min-1. The sonocatalytic property of the nanocomposite membrane is related to 1T/2H mixed-phase and PVDF. Additionally, the metallic based 1T phase MoS2 helps to promote electrons and holes and reduce the recombination rate. Moreover, it promotes the generation of more hydroxy radicals (.OH), and superoxide radicals (∙O2-) play a significant role in sonocatalytic degradation of RhB pollutants. Thus, the improved sonocatalytic degradation of 1T/2H MoS2/PVDF composite membrane exhibited its application in real-time wastewater treatment.
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Affiliation(s)
| | - Gowthami Palanisamy
- School of Chemical Engineering, Yeungnam University, Gyeongsan, 38541, South Korea.
| | - Tae Hwan Oh
- School of Chemical Engineering, Yeungnam University, Gyeongsan, 38541, South Korea.
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Crystal Design and Photoactivity of TiO 2 Nanorod Template Decorated with Nanostructured Bi 2S 3 Visible Light Sensitizer. Int J Mol Sci 2022; 23:ijms231912024. [PMID: 36233326 PMCID: PMC9569727 DOI: 10.3390/ijms231912024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Revised: 10/06/2022] [Accepted: 10/06/2022] [Indexed: 11/23/2022] Open
Abstract
In this study, TiO2-Bi2S3 composites with various morphologies were synthesized through hydrothermal vulcanization with sputtering deposited Bi2O3 sacrificial layer method on the TiO2 nanorod templates. The morphologies of decorated Bi2S3 nanostructures on the TiO2 nanorod templates are controlled by the duration of hydrothermal vulcanization treatment. The Bi2S3 crystals in lumpy filament, nanowire, and nanorod feature were decorated on the TiO2 nanorod template after 1, 3, and 5 h hydrothermal vulcanization, respectively. Comparatively, TiO2-Bi2S3 composites with Bi2S3 nanowires exhibit the best photocurrent density, the lowest interfacial resistance value and the highest photodegradation efficiency towards Rhodamine B solution. The possible Z-scheme photoinduced charge separation mechanism and suitable morphology of Bi2S3 nanowires might account for the high photoactivity of TiO2 nanorod-Bi2S3 nanowire composites.
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Fawzi T, Rani S, Roy SC, Lee H. Photocatalytic Carbon Dioxide Conversion by Structurally and Materially Modified Titanium Dioxide Nanostructures. Int J Mol Sci 2022; 23:ijms23158143. [PMID: 35897719 PMCID: PMC9330242 DOI: 10.3390/ijms23158143] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2022] [Revised: 07/21/2022] [Accepted: 07/22/2022] [Indexed: 12/18/2022] Open
Abstract
TiO2 has aroused considerable attentions as a promising photocatalytic material for decades due to its superior material properties in several fields such as energy and environment. However, the main dilemmas are its wide bandgap (3–3.2 eV), that restricts the light absorption in limited light wavelength region, and the comparatively high charge carrier recombination rate of TiO2, is a hurdle for efficient photocatalytic CO2 conversion. To tackle these problems, lots of researches have been implemented relating to structural and material modification to improve their material, optical, and electrical properties for more efficient photocatalytic CO2 conversion. Recent studies illustrate that crystal facet engineering could broaden the performance of the photocatalysts. As same as for nanostructures which have advantages such as improved light absorption, high surface area, directional charge transport, and efficient charge separation. Moreover, strategies such as doping, junction formation, and hydrogenation have resulted in a promoted photocatalytic performance. Such strategies can markedly change the electronic structure that lies behind the enhancement of the solar spectrum harnessing. In this review, we summarize the works that have been carried out for the enhancement of photocatalytic CO2 conversion by material and structural modification of TiO2 and TiO2-based photocatalytic system. Moreover, we discuss several strategies for synthesis and design of TiO2 photocatalysts for efficient CO2 conversion by nanostructure, structure design of photocatalysts, and material modification.
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Affiliation(s)
- Tarek Fawzi
- Department of Photonics, National Sun Yat-sen University, No. 70, Lien-Hai Rd, Kaohsiung 80424, Taiwan; or
| | - Sanju Rani
- Department of Physics, SRM Institute of Science and Technology, Ramapuram Campus, Chennai 600089, Tamil Nadu, India;
| | - Somnath C. Roy
- Semiconducting Oxide Materials, Nanostructures and Tailored Heterojunction (SOMNaTH) Lab, Functional Oxides Research Group (FORG) and 2D Materials and Innovation Centre, Department of Physics, IIT Madras, Chennai 600036, Tamil Nadu, India;
| | - Hyeonseok Lee
- Department of Photonics, National Sun Yat-sen University, No. 70, Lien-Hai Rd, Kaohsiung 80424, Taiwan; or
- Correspondence: ; Tel.: +886-7-525-2000 (ext. 4473)
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Ingenious design of ternary hollow nanosphere with shell hierarchical tandem heterojunctions toward optimized Visible-light photocatalytic reduction of U(VI). Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2021.120418] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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8
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The role of Cerium, Europium and Erbium doped TiO2 photocatalysts in water treatment: a mini-review. CHEMICAL ENGINEERING JOURNAL ADVANCES 2022. [DOI: 10.1016/j.ceja.2022.100268] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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9
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Wan J, Al-Baldawy AS, Qu S, Lan J, Ye X, Fei Y, Zhao J, Wang Z, Hong R, Guo S, Huang S, Li S, Kang J. Band alignment of ZnO-based nanorod arrays for enhanced visible light photocatalytic performance. RSC Adv 2022; 12:27189-27198. [PMID: 36276038 PMCID: PMC9511231 DOI: 10.1039/d2ra03940k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Accepted: 09/14/2022] [Indexed: 11/21/2022] Open
Abstract
A ternary semiconductor ZnO/MoS2/Ag2S nanorod array in an intimate core–shell structure was synthesized on glass substrates. The physicochemical properties and photocatalytical performance of the specimen were characterized and compared with single ZnO and binary ZnO/Ag2S and ZnO/MoS2 nanorod arrays. It is found that the coating layers depressed the band edge emission of the ZnO core, improved light absorption in the visible range, reduced charge transfer resistance, and increased photocatalytic activity. The ternary heterojunction nanorod array possessed full solar absorption with an efficiency of 52.88% for the degradation of methylene blue under visible light in 30 min. The efficiency was higher than other arrays and was 7.6 times that of the ZnO array. Theory analysis revealed that the coating layer brought different band alignment in the heterojunctions for efficient charge separation and conduction, which was beneficial for the photocatalytic performance. The ternary ZnO/MoS2/Ag2S nanorod array in a core–shell structure brings different band alignments at the interfacial heterojunctions to achieve full solar absorption with efficient charge separation and conduction and photocatalytic performance.![]()
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Affiliation(s)
- Jing Wan
- Engineering Research Center of Micro-nano Optoelectronic Materials and Devices, Ministry of Education, Fujian Key Laboratory of Semiconductor Materials and Applications, CI Center for OSED, Department of Physics, Jiujiang Research Institute, Xiamen University, Xiamen 361005, China
| | - Aseel Shaker Al-Baldawy
- Department of Food Science, Faculty of Agriculture, University of Kufa, Kufa, Najaf 054003, Iraq
| | - Shanzhi Qu
- Engineering Research Center of Micro-nano Optoelectronic Materials and Devices, Ministry of Education, Fujian Key Laboratory of Semiconductor Materials and Applications, CI Center for OSED, Department of Physics, Jiujiang Research Institute, Xiamen University, Xiamen 361005, China
| | - Jinshen Lan
- Engineering Research Center of Micro-nano Optoelectronic Materials and Devices, Ministry of Education, Fujian Key Laboratory of Semiconductor Materials and Applications, CI Center for OSED, Department of Physics, Jiujiang Research Institute, Xiamen University, Xiamen 361005, China
| | - Xiaofang Ye
- Engineering Research Center of Micro-nano Optoelectronic Materials and Devices, Ministry of Education, Fujian Key Laboratory of Semiconductor Materials and Applications, CI Center for OSED, Department of Physics, Jiujiang Research Institute, Xiamen University, Xiamen 361005, China
| | - Yuchen Fei
- Engineering Research Center of Micro-nano Optoelectronic Materials and Devices, Ministry of Education, Fujian Key Laboratory of Semiconductor Materials and Applications, CI Center for OSED, Department of Physics, Jiujiang Research Institute, Xiamen University, Xiamen 361005, China
| | - Jingtian Zhao
- Engineering Research Center of Micro-nano Optoelectronic Materials and Devices, Ministry of Education, Fujian Key Laboratory of Semiconductor Materials and Applications, CI Center for OSED, Department of Physics, Jiujiang Research Institute, Xiamen University, Xiamen 361005, China
| | - Ziyun Wang
- Engineering Research Center of Micro-nano Optoelectronic Materials and Devices, Ministry of Education, Fujian Key Laboratory of Semiconductor Materials and Applications, CI Center for OSED, Department of Physics, Jiujiang Research Institute, Xiamen University, Xiamen 361005, China
| | - Rongdun Hong
- Engineering Research Center of Micro-nano Optoelectronic Materials and Devices, Ministry of Education, Fujian Key Laboratory of Semiconductor Materials and Applications, CI Center for OSED, Department of Physics, Jiujiang Research Institute, Xiamen University, Xiamen 361005, China
| | - Shengshi Guo
- Engineering Research Center of Micro-nano Optoelectronic Materials and Devices, Ministry of Education, Fujian Key Laboratory of Semiconductor Materials and Applications, CI Center for OSED, Department of Physics, Jiujiang Research Institute, Xiamen University, Xiamen 361005, China
| | - Shengli Huang
- Engineering Research Center of Micro-nano Optoelectronic Materials and Devices, Ministry of Education, Fujian Key Laboratory of Semiconductor Materials and Applications, CI Center for OSED, Department of Physics, Jiujiang Research Institute, Xiamen University, Xiamen 361005, China
| | - Shuping Li
- Engineering Research Center of Micro-nano Optoelectronic Materials and Devices, Ministry of Education, Fujian Key Laboratory of Semiconductor Materials and Applications, CI Center for OSED, Department of Physics, Jiujiang Research Institute, Xiamen University, Xiamen 361005, China
| | - Junyong Kang
- Engineering Research Center of Micro-nano Optoelectronic Materials and Devices, Ministry of Education, Fujian Key Laboratory of Semiconductor Materials and Applications, CI Center for OSED, Department of Physics, Jiujiang Research Institute, Xiamen University, Xiamen 361005, China
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Janbandhu SY, Ct S, Munishwar SR, Jayaramaiah JR, Gedam RS. Borosilicate glasses containing CdS/ZnS QDs: A heterostructured composite with enhanced degradation of IC dye under visible-light. CHEMOSPHERE 2022; 286:131672. [PMID: 34346328 DOI: 10.1016/j.chemosphere.2021.131672] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Revised: 07/16/2021] [Accepted: 07/23/2021] [Indexed: 06/13/2023]
Abstract
The glass system SiO2-B2O3-Na2O3-ZnO containing 2 wt% CdS and 1 wt% ZnS was synthesized by the conventional melt quench method. Glass transition temperature and crystallization temperature was determined from Differential thermal analysis (DTA) measurement to optimize heat-treatment. The amorphous structure of the glass was confirmed by the X-ray diffraction (XRD) measurement. Glasses were heat-treated by optimized heat-treatment schedule to grow CdS/ZnS QDs and crystalline phases of CdS and ZnS were confirmed by the XRD measurement. High-Resolution Transmission Electron Microscopy (HRTEM) was used to determine the size and shape of quantum dots (QDs) grown in the glass matrix. The optical band gap was calculated from the absorption spectra and found to decrease with increase in size of QDs. Electron-hole recombination rate was studied using a decay time and impedance analyzer. Prepared samples were tested as a photocatalyst under sunlight for the degradation of indigo carmine (IC) dye and photodegradation efficiency was found to be 73.6 % and 87.2 % for samples CZ1 and CZ4 respectively. No significant change is observed in degradation efficiency even for 4 cycles which confirms the stability of prepared glasses for dye degradation.
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Affiliation(s)
- S Y Janbandhu
- Department of Physics, Visvesvaraya National Institute of Technology, Nagpur, 440010, India
| | - Suhaila Ct
- Department of Physics, Visvesvaraya National Institute of Technology, Nagpur, 440010, India
| | - S R Munishwar
- Department of Physics, Visvesvaraya National Institute of Technology, Nagpur, 440010, India
| | - J R Jayaramaiah
- Department of Physics, Government First Grade College, Tiptur, 572 201, India
| | - R S Gedam
- Department of Physics, Visvesvaraya National Institute of Technology, Nagpur, 440010, India.
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11
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Preparation of ordered mesoporous F–H2Ti3O7 nanosheets using orthorhombic HTiOF3 as a precursor and their highly efficient degradation of tetracycline hydrochloride under simulated sunlight. J SOLID STATE CHEM 2021. [DOI: 10.1016/j.jssc.2021.122288] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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12
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Wang S, Liu D, Yu J, Zhang X, Zhao P, Ren Z, Sun Y, Li M, Han S. Photocatalytic Penicillin Degradation Performance and the Mechanism of the Fragmented TiO 2 Modified by CdS Quantum Dots. ACS OMEGA 2021; 6:18178-18189. [PMID: 34308049 PMCID: PMC8296572 DOI: 10.1021/acsomega.1c02079] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Accepted: 06/24/2021] [Indexed: 06/02/2023]
Abstract
In this study, a novel method was adopted to construct a CdS-TiO2 heterostructure to degrade penicillin under sunlight. A potato extract was used during the synthesis process of CdS QDs as a stabilizer and a modifier. The CdS-TiO2 composite with a heterostructure delivers high photocatalytic degradation efficiency. In detail, 0.6 mg/mL of CdS-TiO2 can successfully decompose penicillin after 2 h, and 5‰ CdS-TiO2 shows the optimal degradation efficiency with the degradation rate reaching 88%. Furthermore, the underlying mechanisms of the penicillin decomposition reaction were investigated by the EPR test and trapping experiment. It was found that the high photocatalytic degradation efficiency was attributed to the heterojunction of CdS-TiO2, which successfully suppresses the recombination of the conduction band of CdS and the valence band of TiO2. Moreover, it was confirmed that the reaction is the O2-consuming process, and introducing O2 can greatly accelerate the generation of a superoxide radical during the photocatalytic degradation process, which eventually improves the degradation of penicillin and shortens the degradation time. Finally, this work provides the possible penicillin degradation pathways, which will inspire the researchers to explore and design novel photocatalysts in the field of wastewater treatment in the future.
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13
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Rafiee Z, Davar F, Hasani S, Majedi A, Shalan AE. Copper sulfide nanostructures: easy synthesis, photocatalytic and doxorubicin anticancer drug delivery applications. NEW J CHEM 2021. [DOI: 10.1039/d1nj04618g] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Copper sulfide nanostructures with different morphologies were used as a photocatalyst and antitumor drug delivery.
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Affiliation(s)
- Zahra Rafiee
- Department of Chemistry, Isfahan University of Technology, Isfahan, 84156-83111, Iran
| | - Fatemeh Davar
- Department of Chemistry, Isfahan University of Technology, Isfahan, 84156-83111, Iran
| | - Saeed Hasani
- Department of Mining and Metallurgical Engineering, Yazd University, P. O. Box 89195-741, Yazd, Iran
| | - Ali Majedi
- Department of Chemistry, Isfahan University of Technology, Isfahan, 84156-83111, Iran
- IQC Center of Haerasa, Entekhab Electronic Group, Isfahan, Iran
| | - Ahmed Esmail Shalan
- BCMaterials, Basque Center for Materials, Applications and Nanostructures, Martina Casiano, UPV/EHU Science Park, Barrio Sarriena s/n, Leioa 48940, Spain
- Central Metallurgical Research and Development Institute (CMRDI), P. O. Box 87, Helwan, Cairo 11421, Egypt
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14
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Tang X, Liu H, Yang C, Jin X, Zhong J, Li J. In-situ fabrication of Z-scheme CdS/BiOCl heterojunctions with largely improved photocatalytic performance. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2020.124880] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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15
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Parvari R, Ghorbani-Shahna F, Bahrami A, Azizian S, Assari MJ, Farhadian M. A novel core-shell structured α-Fe2O3/Cu/g-C3N4 nanocomposite for continuous photocatalytic removal of air ethylbenzene under visible light irradiation. J Photochem Photobiol A Chem 2020. [DOI: 10.1016/j.jphotochem.2020.112643] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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16
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Wu Z, Xue Y, He X, Li Y, Yang X, Wu Z, Cravotto G. Surfactants-assisted preparation of BiVO 4 with novel morphologies via microwave method and CdS decoration for enhanced photocatalytic properties. JOURNAL OF HAZARDOUS MATERIALS 2020; 387:122019. [PMID: 31927261 DOI: 10.1016/j.jhazmat.2020.122019] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2019] [Revised: 12/31/2019] [Accepted: 01/02/2020] [Indexed: 06/10/2023]
Abstract
The development of a highly efficient and rapid method for the accurate preparation of photocatalysts with novel morphologies is a hot research topic. The different morphologies of BiVO4 was prepared using surfactants-assisted microwave method, and demonstrated irregular (no surfactant), octahedral (sodium dodecyl benzene sulfonate), olive-like (polyvinylpyrrolidone) and hollow structures (ethylenediaminetetraacetic acid), respectively. The BiVO4-CdS were synthesized using the chemical-bath-deposition method with different morphologies of BiVO4 as the substrates. The hollow structure of BiVO4 displayed the highest photocatalytic performance. Moreover, the photodegradation rates of the hollow structure BiVO4-CdS on tetracycline hydrochloride and ciprofloxacin were about 1.8 and 1.5 times higher than the corresponding BiVO4, indicating that the Z-scheme heterojunction can improve the photogenerated electron pairs separation efficiency. Furthermore, the regulation mechanism of morphology and energy-band position, as produced using the surfactants, has also been thoroughly investigated in this work, which provides a novel insight into the efficient and rapid preparation of photocatalysts with special morphology and high performance.
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Affiliation(s)
- Zhansheng Wu
- School of Environmental and Chemical Engineering, Xi'an Polytechnic University, Xi'an, 710048, PR China; School of Chemistry and Chemical Engineering, Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, Shihezi University, Shihezi, 832003, PR China.
| | - Yongtao Xue
- School of Chemistry and Chemical Engineering, Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, Shihezi University, Shihezi, 832003, PR China
| | - Xiufang He
- School of Chemistry and Chemical Engineering, Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, Shihezi University, Shihezi, 832003, PR China
| | - Yunfeng Li
- School of Environmental and Chemical Engineering, Xi'an Polytechnic University, Xi'an, 710048, PR China
| | - Xia Yang
- School of Environmental and Chemical Engineering, Xi'an Polytechnic University, Xi'an, 710048, PR China
| | - Zhilin Wu
- Department of Drug Science and Technology, University of Turin, Turin, 10125, Italy
| | - Giancarlo Cravotto
- Department of Drug Science and Technology, University of Turin, Turin, 10125, Italy; Institute of Translational Medicine and Biotechnology, Sechenov First Moscow State Medical University, Moscow, 109807, Russia
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Chen X, He X, Yang X, Wu Z, Li Y. Construction of novel 2D/1D g-C3N4/CaTiO3 heterojunction with face-to-face contact for boosting photodegradation of triphenylmethane dyes under simulated sunlight. J Taiwan Inst Chem Eng 2020. [DOI: 10.1016/j.jtice.2019.12.002] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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18
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Ag as Cocatalyst and Electron-Hole Medium in CeO 2 QDs/Ag/Ag 2Se Z-scheme Heterojunction Enhanced the Photo-Electrocatalytic Properties of the Photoelectrode. NANOMATERIALS 2020; 10:nano10020253. [PMID: 32023932 PMCID: PMC7075152 DOI: 10.3390/nano10020253] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Revised: 01/25/2020] [Accepted: 01/27/2020] [Indexed: 01/20/2023]
Abstract
A recyclable photoelectrode with high degradation capability for organic pollutants is crucial for environmental protection and, in this work, a novel CeO2 quantum dot (QDs)/Ag2Se Z-scheme photoelectrode boasting increased visible light absorption and fast separation and transfer of photo-induced carriers is prepared and demonstrated. A higher voltage increases the photocurrent and 95.8% of tetracycline (TC) is degraded by 10% CeO2 QDs/Ag2Se in 75 minutes. The degradation rate is superior to that achieved by photocatalysis (92.3% of TC in 90 min) or electrocatalysis (27.7% of TC in 90 min). Oxygen vacancies on the CeO2 QDs advance the separation and transfer of photogenerated carriers at the interfacial region. Free radical capture tests demonstrate that •O2−, •OH, and h+ are the principal active substances and, by also considering the bandgaps of CeO2 QDs and Ag2Se, the photocatalytic mechanism of CeO2 QDs/Ag2Se abides by the Z-scheme rather than the traditional heterojunction scheme. A small amount of metallic Ag formed in the photocatalysis process can form a high-speed charge transfer nano channel, which can greatly inhibit the photogenerated carrier recombination, improve the photocatalytic performance, and help form a steady Z-scheme photocatalysis system. This study would lay a foundation for the design of a Z-scheme solar photocatalytic system.
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Alizadeh S, Fallah N, Nikazar M. Synthesis and characterization of direct Z-scheme CdS/TiO2 nanocatalyst and evaluate its photodegradation efficiency in wastewater treatment systems. CHEMICAL PAPERS 2020. [DOI: 10.1007/s11696-019-00862-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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Mukhtar A, Cao XM, Mehmood T, Wang DS, Wu KM. Structural characterization of self-assembled chain like Fe-FeOx Core shell nanostructure. NANOSCALE RESEARCH LETTERS 2019; 14:308. [PMID: 31502100 PMCID: PMC6734011 DOI: 10.1186/s11671-019-3128-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/02/2019] [Accepted: 08/19/2019] [Indexed: 06/10/2023]
Abstract
One of the big challenge of studying the core-shell iron nanostructures is to know the nature of oxide shell, i.e., whether it is γ-Fe2O3 (Maghemite), Fe3O4 (Magnetite), α-Fe2O3 (Hematite), or FeO (Wustite). By knowing the nature of iron oxide shell with zero valent iron core, one can determine the chemical or physical behavior of core-shell nanostructures. Fe core-shell nanochains (NCs) were prepared through the reduction of Fe3+ ions by sodium boro-hydride in aqueous solution at room atmosphere, and Fe NCs were further aged in water up to 240 min. XRD was used to study the structure of Fe NCs. Further analysis of core-shell nature of Fe NCs was done by TEM, results showed increase in thickness of oxide shell (from 2.5, 4, 6 to 10 nm) as water aging time increases (from 0 min, 120 min, 240 min to 360 min). The Raman spectroscopy was employed to study the oxide nature of Fe NCs. To further confirm the magnetite phase in Fe NCs, the Mössbauer spectroscopy was done on Fe NCs-0 and Fe NCs-6. Result shows the presence of magnetite in the sample before aging in water, and the sample after prolonged aging contains pure Hematite phase. It shows that prolonged water oxidation transforms the structure of shell of Fe NCs from mixture of Hematite and Magnetite in to pure hematite shell. The Magnetic properties of the Fe NCs were measured by VSM at 320 K. Because of high saturation magnetization (Ms) values, Fe NCs could be used as r2 contrasts agents for magnetic resonance imaging (MRI) in near future.
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Affiliation(s)
- Aiman Mukhtar
- The State Key Laboratory of Refractories and Metallurgy, Hubei Province Key Laboratory of Systems Science in Metallurgical Process, International Research Institute for Steel Technology, Wuhan University of Science and Technology, Wuhan, People’s Republic of China
| | - Xiao-Ming Cao
- The State Key Laboratory of Refractories and Metallurgy, Hubei Province Key Laboratory of Systems Science in Metallurgical Process, International Research Institute for Steel Technology, Wuhan University of Science and Technology, Wuhan, People’s Republic of China
| | - Tahir Mehmood
- The State Key Laboratory of Refractories and Metallurgy, Hubei Province Key Laboratory of Systems Science in Metallurgical Process, International Research Institute for Steel Technology, Wuhan University of Science and Technology, Wuhan, People’s Republic of China
| | - Da-shuang Wang
- The State Key Laboratory of Refractories and Metallurgy, Hubei Province Key Laboratory of Systems Science in Metallurgical Process, International Research Institute for Steel Technology, Wuhan University of Science and Technology, Wuhan, People’s Republic of China
| | - Kai-ming Wu
- The State Key Laboratory of Refractories and Metallurgy, Hubei Province Key Laboratory of Systems Science in Metallurgical Process, International Research Institute for Steel Technology, Wuhan University of Science and Technology, Wuhan, People’s Republic of China
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Hierarchical fabrication Z-scheme photocatalyst of BiVO4 (0 4 0)-Ag@CdS for enhanced photocatalytic properties under simulated sunlight irradiation. J Colloid Interface Sci 2019; 548:293-302. [DOI: 10.1016/j.jcis.2019.04.043] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2019] [Revised: 04/12/2019] [Accepted: 04/14/2019] [Indexed: 10/27/2022]
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Razzaq A, In SI. TiO 2 Based Nanostructures for Photocatalytic CO 2 Conversion to Valuable Chemicals. MICROMACHINES 2019; 10:E326. [PMID: 31096666 PMCID: PMC6562687 DOI: 10.3390/mi10050326] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/20/2019] [Revised: 05/01/2019] [Accepted: 05/08/2019] [Indexed: 01/28/2023]
Abstract
Photocatalytic conversion of CO2 to useful products is an alluring approach for acquiring the two-fold benefits of normalizing excess atmospheric CO2 levels and the production of solar chemicals/fuels. Therefore, photocatalytic materials are continuously being developed with enhanced performance in accordance with their respective domains. In recent years, nanostructured photocatalysts such as one dimensional (1-D), two dimensional (2-D) and three dimensional (3-D)/hierarchical have been a subject of great importance because of their explicit advantages over 0-D photocatalysts, including high surface areas, effective charge separation, directional charge transport, and light trapping/scattering effects. Furthermore, the strategy of doping (metals and non-metals), as well as coupling with a secondary material (noble metals, another semiconductor material, graphene, etc.), of nanostructured photocatalysts has resulted in an amplified photocatalytic performance. In the present review article, various titanium dioxide (TiO2)-based nanostructured photocatalysts are briefly overviewed with respect to their application in photocatalytic CO2 conversion to value-added chemicals. This review primarily focuses on the latest developments in TiO2-based nanostructures, specifically 1-D (TiO2 nanotubes, nanorods, nanowires, nanobelts etc.) and 2-D (TiO2 nanosheets, nanolayers), and the reaction conditions and analysis of key parameters and their role in the up-grading and augmentation of photocatalytic performance. Moreover, TiO2-based 3-D and/or hierarchical nanostructures for CO2 conversions are also briefly scrutinized, as they exhibit excellent performance based on the special nanostructure framework, and can be an exemplary photocatalyst architecture demonstrating an admirable performance in the near future.
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Affiliation(s)
- Abdul Razzaq
- Department of Chemical Engineering, COMSATS University Islamabad, Lahore Campus, 1.5 KM Defence Road, Off Raiwind Road, Lahore 54000, Pakistan.
| | - Su-Il In
- Department of Energy Science & Engineering, DGIST, 333 Techno Jungang-daero, Hyeonpung-myeon, Dalseong-gun, Daegu 42988, Korea.
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Wu Z, Chen X, Liu X, Yang X, Yang Y. A Ternary Magnetic Recyclable ZnO/Fe 3O 4/g-C 3N 4 Composite Photocatalyst for Efficient Photodegradation of Monoazo Dye. NANOSCALE RESEARCH LETTERS 2019; 14:147. [PMID: 31037394 PMCID: PMC6488635 DOI: 10.1186/s11671-019-2974-2] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2018] [Accepted: 04/04/2019] [Indexed: 05/05/2023]
Abstract
To develop a highly efficient visible light-induced and conveniently recyclable photocatalyst, in this study, a ternary magnetic ZnO/Fe3O4/g-C3N4 composite photocatalyst was synthesized for the photodegradation of Monas dye. The structure and optical performance of the composite photocatalyst were characterized using X-ray diffraction (XRD), transmission electron microscopye (TEM), energy dispersive spectroscopy (EDS), photoluminescence (PL) spectra, ultraviolet-visible diffuse reflection, and photo-electrochemistry. The photocatalytic activities of the prepared ZnO/Fe3O4/g-C3N4 nanocomposites were notably improved, and they were significantly higher than those of pure g-C3N4 and ZnO. Given the presence of the heterojunction between the interfaces of g-C3N4 and ZnO, the higher response to visible light and separation efficiency of the photo-induced electrons and holes enhanced the photocatalytic activities of the ZnO/Fe3O4/g-C3N4 nanocomposites. The stability experiment revealed that ZnO/Fe3O4/g-C3N4-50% demonstrates a relatively higher photocatalytic activity after 5 recycles. The degradation efficiency of MO, AYR, and OG over ZnO/Fe3O4/g-C3N4-50% were 97.87%, 98.05%, and 83.35%, respectively, which was due to the number of dye molecules adsorbed on the photocatalyst and the structure of the azo dye molecule. Azo dyes could be effectively and rapidly photodegraded by the obtained photocatalyst. Therefore, the environment-friendly photocatalyst could be widely applied to the treatment of dye contaminated wastewater.
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Affiliation(s)
- Zhansheng Wu
- School of Environmental and Chemical Engineering, Xi’an Polytechnic University, Xi’an, 710048 People’s Republic of China
- School of Chemistry and Chemical Engineering, Shihezi University, Shihezi, 832003 People’s Republic of China
| | - Xiaoqing Chen
- School of Chemistry and Chemical Engineering, Shihezi University, Shihezi, 832003 People’s Republic of China
| | - Xiaochen Liu
- School of Environmental and Chemical Engineering, Xi’an Polytechnic University, Xi’an, 710048 People’s Republic of China
| | - Xia Yang
- School of Environmental and Chemical Engineering, Xi’an Polytechnic University, Xi’an, 710048 People’s Republic of China
| | - Yan Yang
- School of Environmental and Chemical Engineering, Xi’an Polytechnic University, Xi’an, 710048 People’s Republic of China
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