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Yan C, Tang Z, Wang L, Piao Z, Wang H, Zhang Y. Covalently Linking Reduced Graphene Oxide Facilitated Electrodeposition of MoS 2 on Silicon Pyramidal Photocathode To Enhance Hydrogen Evolution. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:12427-12436. [PMID: 38804701 DOI: 10.1021/acs.langmuir.4c00679] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2024]
Abstract
In recent years, increasing attention has been paid to photoelectrochemical (PEC) hydrogen production owing to the utilization of sustainable solar energy and its promising performance. Silicon-based composites are generally considered ideal materials for PEC hydrogen production. However, slow reaction kinetics and poor stability are still key factors hindering the development of silicon-based photoelectrocatalysts. Herein, we present an n+-p Si pyramidal photocathode assembly method to load reduced graphene oxide (rGO) onto the surface of the n+-p Si pyramid by covalently linking (Si/rGO). rGO is utilized as a conductive layer to reduce the interfacial charge-transfer resistance. Then, MoS2 can be successfully electrodeposited on the surface of Si/rGO to form the Si/rGO/MoS2 composite, which possesses excellent PEC hydrogen evolution performance with a high and stable photocurrent of -41.6 mA cm-2 and a hydrogen evolution rate of about 18.1 μmol min-1 cm-2 under 0 V (vs RHE). The covalently linking rGO layer effectively enhances the transfer of photogenerated carriers between the Si substrate and MoS2. MoS2 provides abundant hydrogen evolution active sites, which accelerate the surface reaction kinetics, as well as a protective layer for the Si pyramidal array structure. This work provides a low-cost, convenient, and efficient way of preparing silicon-based photocathodes.
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Affiliation(s)
- Chenyu Yan
- School of Environmental Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225127, China
| | - Zheng Tang
- School of Environmental Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225127, China
| | - Linjie Wang
- School of Environmental Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225127, China
| | - Zhe Piao
- School of Environmental Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225127, China
| | - Honggui Wang
- School of Environmental Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225127, China
| | - Ya Zhang
- School of Environmental Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225127, China
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2
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Huang J, Cui K, Li L, Li X, Wang F, Wang Y, Zhang Y, Ge S, Yu J. Paper-Supported Photoelectrochemical Biosensor for Dual-Mode miRNA-106a Assay: Integration of Luminescence-Confined Upconversion-Actuated Fluorescent Resonance Energy Transfer and CRISPR/Cas13a-Powered Cascade DNA Circuits. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:16048-16059. [PMID: 37918973 DOI: 10.1021/acs.langmuir.3c02187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2023]
Abstract
Near-infrared (NIR)-responsive bioassays based on upconversion nanoparticle (UCNP) incorporating high-performance semiconductors have been developed by researchers, but most lack satisfactory ultrasensitivity for exceedingly trace amounts of target. Herein, for the first time, the CRISPR/Cas13a system is combined with cascade DNA circuits, fluorescent resonance energy transfer (FRET) effect, and luminescence-confined UCNPs-bonded CuInS2/ZnO p-n heterostructures-functionalized paper-working electrode to construct dual-signal-on paper-supported NIR-irradiated photoelectrochemical (PEC) (NIR-PEC) and upconversion luminescence (UCL) bioassay for high-sensitive quantification of miRNA-106a (miR-106a). By constructing an ideal FAM-labeled aminating molecular beacon (FAM-H2) model, a relatively good FRET ratio between the UCNP and FAM (≈85.3%) can be achieved. In the existence of miR-106a, the hairpin-structure FAM-H2 was unwound, bringing about the distance increase of UCNP and FAM and the restraint of FRET. Accordingly, both the NIR-PEC signal and the UCL intensity gradually recovered distinctly. Unlike conventional single-mode PEC sensors, with NIR excitation, the designed dual-mode sensing system could implement minimized misdiagnose assay and quantitative miR-106a determination with low detection limits, that is, 76.54 and 51.36 aM for NIR-PEC and UCL detection, respectively. This work not only broadens the horizon of application of the CRISPR/Cas13a strategy toward biosensing but also constructs a new structure of the UCNP-semiconductor in the exploration of efficient NIR-responsive tools and inspires the construction of a no-misdiagnosed and novel biosensor for dual-mode liquid biopsy.
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Affiliation(s)
- Jiali Huang
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, P.R. China
| | - Kang Cui
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, P.R. China
| | - Lin Li
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, P.R. China
| | - Xu Li
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, P.R. China
| | - Fengyi Wang
- Institute for Advanced Interdisciplinary Research, University of Jinan, Jinan 250022, P.R. China
| | - Yangyang Wang
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, P.R. China
| | - Yan Zhang
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, P.R. China
| | - Shenguang Ge
- Institute for Advanced Interdisciplinary Research, University of Jinan, Jinan 250022, P.R. China
| | - Jinghua Yu
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, P.R. China
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Zhou Y, Chai Y, Sun H, Li X, Liu X, Liang Y, Gong X, Wu Z, Liu C, Qin P. Design strategies and mechanisms of g-C 3N 4-based photoanodes for photoelectrocatalytic degradation of organic pollutants in water. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 344:118545. [PMID: 37418928 DOI: 10.1016/j.jenvman.2023.118545] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Revised: 06/17/2023] [Accepted: 06/27/2023] [Indexed: 07/09/2023]
Abstract
Emerging photoelectrocatalytic (PEC) systems integrate the advantages of photocatalysis and electrocatalysis and are considered as a promising technology for solving the global organic pollution problem in water environments. Among the photoelectrocatalytic materials applied for organic pollutant degradation, graphitic carbon nitride (CN) has the combined advantages of environmental compatibility, stability, low cost, and visible light response. However, pristine CN has disadvantages such as low specific surface area, low electrical conductivity, and high charge complexation rate, and how to improve the degradation efficiency of PEC reaction and the mineralization rate of organic matter is the main problem faced in this field. Therefore, this paper reviews the progress of various functionalized CN used for PEC reaction in recent years, and the degradation efficiency of these CN-based materials is critically evaluated. First, the basic principles of PEC degradation of organic pollutants are outlined. Then, engineering strategies to enhance the PEC activity of CN (including morphology control, elemental doping, and heterojunction construction) are focused on, and the structure-activity relationships between these engineering strategies and PEC activity are discussed. In addition, the important role of influencing factors on the PEC system is summarized in terms of mechanism, to provide guidance for the subsequent research. Finally, suggestions and perspectives are provided for the preparation of efficient and stable CN-based photoelectrocatalysts for practical wastewater treatment applications.
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Affiliation(s)
- Yunfei Zhou
- College of Resources and Environment, Xiangtan University, Xiangtan, 411105, PR China; College of Environment and Ecology, Hunan Agricultural University, Changsha, 410128, PR China
| | - Youzheng Chai
- College of Environment and Ecology, Hunan Agricultural University, Changsha, 410128, PR China; Key Laboratory for Rural Ecosystem Health in the Dongting Lake Area of Hunan Province, Changsha, 410128, PR China
| | - Haibo Sun
- College of Environment and Ecology, Hunan Agricultural University, Changsha, 410128, PR China; Key Laboratory for Rural Ecosystem Health in the Dongting Lake Area of Hunan Province, Changsha, 410128, PR China
| | - Xueying Li
- College of Environment and Ecology, Hunan Agricultural University, Changsha, 410128, PR China; Key Laboratory for Rural Ecosystem Health in the Dongting Lake Area of Hunan Province, Changsha, 410128, PR China
| | - Xingwang Liu
- College of Resources and Environment, Xiangtan University, Xiangtan, 411105, PR China.
| | - Yunshan Liang
- College of Environment and Ecology, Hunan Agricultural University, Changsha, 410128, PR China; Key Laboratory for Rural Ecosystem Health in the Dongting Lake Area of Hunan Province, Changsha, 410128, PR China
| | - Xiaomin Gong
- College of Environment and Ecology, Hunan Agricultural University, Changsha, 410128, PR China; Key Laboratory for Rural Ecosystem Health in the Dongting Lake Area of Hunan Province, Changsha, 410128, PR China
| | - Zhibin Wu
- College of Environment and Ecology, Hunan Agricultural University, Changsha, 410128, PR China; Key Laboratory for Rural Ecosystem Health in the Dongting Lake Area of Hunan Province, Changsha, 410128, PR China.
| | - Chao Liu
- College of Environment and Ecology, Hunan Agricultural University, Changsha, 410128, PR China; Key Laboratory for Rural Ecosystem Health in the Dongting Lake Area of Hunan Province, Changsha, 410128, PR China
| | - Pufeng Qin
- College of Environment and Ecology, Hunan Agricultural University, Changsha, 410128, PR China; Key Laboratory for Rural Ecosystem Health in the Dongting Lake Area of Hunan Province, Changsha, 410128, PR China.
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Reddy CV, Nagar A, Shetti NP, Reddy IN, Basu S, Shim J, Kakarla RR. Novel g-C 3N 4/BiVO 4 heterostructured nanohybrids for high efficiency photocatalytic degradation of toxic chemical pollutants. CHEMOSPHERE 2023; 322:138146. [PMID: 36806805 DOI: 10.1016/j.chemosphere.2023.138146] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2022] [Revised: 01/07/2023] [Accepted: 02/12/2023] [Indexed: 06/18/2023]
Abstract
Novel heterostructured hybrid catalysts are essential for the efficient photocatalytic removal of organic pollutants from wastewater generated by the pharmaceutical and textile industries. In this study, novel g-C3N4/BiVO4 nanohybrid catalysts were prepared using a solvothermal technique, and examined their structural and optical properties using different characterizations. The X-ray diffraction analysis confirmed the monoclinic crystal phase of BiVO4. Field emission scanning electron microscopy (FESEM) images revealed that g-C3N4 sheets anchored on the surface of BiVO4 nanospheres. X-ray photoelectron spectroscopy (XPS) analysis confirmed the oxidation states of g-C3N4/BiVO4 composite sample. UV-Vis DRS spectroscopy analysis revealed that the composite (2.08 eV) sample had a reduced bandgap compared to other samples. The photocatalytic properties of the prepared samples were tested in the presence of organic methylene blue (MB) and antibiotic tetracycline (TC) pollutants under visible light illumination. The hybrid composite catalyst exhibited enhanced photocatalytic degradation efficiency of MB (88%) and TC (89%) pollutants at elevated rate constants of 0.0128 and 0.01174 min-1, respectively. The improved catalytic performance of the composite catalyst is due to the heterojunctions between g-C3N4 and BiVO4 that successfully reduced the rate of charge carrier recombination in the catalyst system. Scavenger experiments revealed that O2●- and h+ radicals played a main role in the degradation of the chemical pollutants. The developed g-C3N4/BiVO4 heterostructured catalyst is a suitable candidate for removing contaminants from industrial wastewater because of its facile fabrication and exceptional photocatalytic activity under visible light irradiation.
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Affiliation(s)
- Ch Venkata Reddy
- School of Mechanical Engineering, Yeungnam University, Gyeongsan, 712-749, South Korea
| | - Aashna Nagar
- School of Chemistry and Biochemistry, Thapar Institute of Engineering & Technology, Patiala, 147004, India
| | - Nagaraj P Shetti
- Department of Chemistry, School of Advanced Sciences, KLE Technological University, Vidyanagar, Hubballi, 580 031, Karnataka, India
| | - I Neelakanta Reddy
- School of Mechanical Engineering, Yeungnam University, Gyeongsan, 712-749, South Korea
| | - Soumen Basu
- School of Chemistry and Biochemistry, Thapar Institute of Engineering & Technology, Patiala, 147004, India; Affiliate Faculty-TIET-Virginia Tech Center of Excellence in Emerging Materials, Thapar Institute of Engineering and Technology, Patiala, 147004, India
| | - Jaesool Shim
- School of Mechanical Engineering, Yeungnam University, Gyeongsan, 712-749, South Korea.
| | - Raghava Reddy Kakarla
- School of Chemical and Biomolecular Engineering, The University of Sydney, Sydney, NSW 2006, Australia.
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Pulignani C, Mesa CA, Hillman SAJ, Uekert T, Giménez S, Durrant JR, Reisner E. Rational Design of Carbon Nitride Photoelectrodes with High Activity Toward Organic Oxidations. Angew Chem Int Ed Engl 2022; 61:e202211587. [PMID: 36224107 PMCID: PMC10099510 DOI: 10.1002/anie.202211587] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2022] [Indexed: 11/16/2022]
Abstract
Carbon nitride (CNx ) is a light-absorber with excellent performance in photocatalytic suspension systems, but the activity of CNx photoelectrodes has remained low. Here, cyanamide-functionalized CNx (NCN CNx ) was co-deposited with ITO nanoparticles on a 1.8 Å thick alumina-coated FTO electrode. Transient absorption spectroscopy and impedance measurements support that ITO acts as a conductive binder and improves electron extraction from the NCN CNx , whilst the alumina underlayer reduces recombination losses between the ITO and the FTO glass. The Al2 O3 |ITO : NCN CNx film displays a benchmark performance for CNx -based photoanodes with an onset of -0.4 V vs a reversible hydrogen electrode (RHE), and 1.4±0.2 mA cm-2 at 1.23 V vs RHE during AM1.5G irradiation for the selective oxidation of 4-methylbenzyl alcohol. This assembly strategy will improve the exploration of CNx in fundamental and applied photoelectrochemical (PEC) studies.
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Affiliation(s)
- Carolina Pulignani
- Yusuf Hamied Department of Chemistry University of Cambridge Cambridge CB2 1EW UK
| | - Camilo A. Mesa
- Institute of Advanced Materials (INAM) Universitat Jaume I (UJI) 12006 Castelló de la Plana, Castellón Spain
| | - Sam A. J. Hillman
- Department of Chemistry and Centre for Processable Electronics Imperial College London London W12 0BZ UK
| | - Taylor Uekert
- Yusuf Hamied Department of Chemistry University of Cambridge Cambridge CB2 1EW UK
| | - Sixto Giménez
- Institute of Advanced Materials (INAM) Universitat Jaume I (UJI) 12006 Castelló de la Plana, Castellón Spain
| | - James R. Durrant
- Department of Chemistry and Centre for Processable Electronics Imperial College London London W12 0BZ UK
| | - Erwin Reisner
- Yusuf Hamied Department of Chemistry University of Cambridge Cambridge CB2 1EW UK
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Tian J, Chen Z, Ma L, Hou J, Feng C, Jing J, Chen D. Intrinsic Mechanism Analyses of Significantly Enhanced Photoelectrochemical Performance of the Bi 2MoO 6/BiVO 4 System. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:8906-8917. [PMID: 35816725 DOI: 10.1021/acs.langmuir.2c01031] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
In this paper, the electrodeposition and hydrothermal methods were used to prepare the Bi2MoO6/BiVO4 photoelectrode, and the intrinsic mechanism of significantly enhanced photoelectrochemical performance of the prepared Bi2MoO6/BiVO4 heterojunction system was studied. Work functions of Bi2MoO6 and BiVO4 were analyzed using a scanning Kelvin probe, and the direction of the heterojunction electric field and the transfer direction of photogenerated carriers were finally determined by the relative positions of the energy bands and the Fermi levels of Bi2MoO6 and BiVO4. A type II Bi2MoO6/BiVO4 heterojunction system was finally confirmed to be formed. Formation of the type II Bi2MoO6/BiVO4 heterojunction system reduces the recombination efficiency of photogenerated electrons and holes and thus improves the photoelectrochemical performance. The photogenerated current density of the Bi2MoO6/BiVO4 photoelectrode reaches 1.47 mA·cm-2, which is 4.9 times that of pure BiVO4 and thousands of times that of Bi2MoO6. The successful application of a scanning Kelvin probe in the verification of the heterojunction type provides theoretical and technical bases for the design and construction of efficient heterojunctions.
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Affiliation(s)
- Jing Tian
- School of Materials Science and Hydrogen Energy, Foshan University, 18 Jiangwanyi Road, Foshan 528000, China
- Key Laboratory of Marine Environmental Corrosion and Bio-fouling, Institute of Oceanology, Chinese Academy of Sciences, 7 Nanhai Road, Qingdao 266071, China
- State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute (LSMRI), Wenhai Road, Qingdao 266237, China
- Guangdong Key Laboratory for Hydrogen Energy Technologies, 18 Jiangwanyi Road, Foshan 528000, China
| | - Zhuoyuan Chen
- School of Materials Science and Hydrogen Energy, Foshan University, 18 Jiangwanyi Road, Foshan 528000, China
- State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute (LSMRI), Wenhai Road, Qingdao 266237, China
- Guangdong Key Laboratory for Hydrogen Energy Technologies, 18 Jiangwanyi Road, Foshan 528000, China
| | - Li Ma
- State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute (LSMRI), Wenhai Road, Qingdao 266237, China
| | - Jian Hou
- State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute (LSMRI), Wenhai Road, Qingdao 266237, China
| | - Chang Feng
- School of Materials Science and Hydrogen Energy, Foshan University, 18 Jiangwanyi Road, Foshan 528000, China
- Guangdong Key Laboratory for Hydrogen Energy Technologies, 18 Jiangwanyi Road, Foshan 528000, China
| | - Jiangping Jing
- School of Materials Science and Hydrogen Energy, Foshan University, 18 Jiangwanyi Road, Foshan 528000, China
- State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute (LSMRI), Wenhai Road, Qingdao 266237, China
- Guangdong Key Laboratory for Hydrogen Energy Technologies, 18 Jiangwanyi Road, Foshan 528000, China
| | - Dongchu Chen
- School of Materials Science and Hydrogen Energy, Foshan University, 18 Jiangwanyi Road, Foshan 528000, China
- Guangdong Key Laboratory for Hydrogen Energy Technologies, 18 Jiangwanyi Road, Foshan 528000, China
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Recent Progress on Photoelectrochemical Water Splitting of Graphitic Carbon Nitride (g−CN) Electrodes. NANOMATERIALS 2022; 12:nano12142374. [PMID: 35889598 PMCID: PMC9321715 DOI: 10.3390/nano12142374] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Revised: 07/06/2022] [Accepted: 07/08/2022] [Indexed: 02/04/2023]
Abstract
Graphitic carbon nitride (g−CN), a promising visible-light-responsive semiconductor material, is regarded as a fascinating photocatalyst and heterogeneous catalyst for various reactions due to its non-toxicity, high thermal durability and chemical durability, and “earth-abundant” nature. However, practical applications of g−CN in photoelectrochemical (PEC) and photoelectronic devices are still in the early stages of development due to the difficulties in fabricating high-quality g−CN layers on substrates, wide band gaps, high charge-recombination rates, and low electronic conductivity. Various fabrication and modification strategies of g−CN-based films have been reported. This review summarizes the latest progress related to the growth and modification of high-quality g−CN-based films. Furthermore, (1) the classification of synthetic pathways for the preparation of g−CN films, (2) functionalization of g−CN films at an atomic level (elemental doping) and molecular level (copolymerization), (3) modification of g−CN films with a co-catalyst, and (4) composite films fabricating, will be discussed in detail. Last but not least, this review will conclude with a summary and some invigorating viewpoints on the key challenges and future developments.
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Environment Friendly g-C3N4-Based Catalysts and Their Recent Strategy in Organic Transformations. HIGH ENERGY CHEMISTRY 2022. [PMCID: PMC8960706 DOI: 10.1134/s0018143922020102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Organic molecules synthesized in an environmentally friendly manner have excellent therapeutic potential. The entire preparation technique was examined in the existence of a light source, implying that light has been replaced by heating and the usage of dangerous chemicals has decreased, resulting in less pollution of the environment. The advantages of these nanocarbon catalysts include high efficiency, environmentally friendly synthesis, eco-friendly, inexpensive, and non-corrodible. In organic transformations, solid metal base/metal-free catalysts produce better results. Here, the metal-free semiconductor g-C3N4 was used to demonstrate the catalytic behavior of organic conversions. g-C3N4 is a two-dimensional material and a p‑type semiconductor to enhance the photocatalytic activity. The excellent properties of g-C3N4 sheet lead to the support of metals to form metal-organic frameworks. Most of the reactions gained positive response under visible light irradiation. This review will inspire readers in widen the applications of g-C3N4 based catalyst in various organic transformation reactions.
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Photocatalytic water purification under visible light using carbon nitride materials and β-Bi2O3 immobilized on electrospun polyvinyl acetate fibers. SN APPLIED SCIENCES 2022. [DOI: 10.1007/s42452-022-04945-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
Abstract
AbstractWe report on the immobilization of carbon nitride (CN) materials and β-Bi2O3 on electrospun polyvinyl acetate (PVAc) fiber substrates using a dispersion based dip coating process. The spinning process was optimized by variation of several parameters to finally obtain continuous droplet-free fibers at 15 kV and a flow rate of 50 µL min−1 using a needle with 1.2 mm diameter. The polymer substrates were coated with the β-Bi2O3 and CN materials, which were characterized using SEM and applied in the photocatalytic degradation of organic pollutants such as Rhodamine B (RhB), ethinyl estradiol (EE2) and triclosan using visible light irradiation. The pollutants were degraded with up to 50% of the initial concentration within 8 h. Different amounts of CN material were deposited to evaluate the photocatalytic activity per mass. Immobilized CN materials were shown to be of higher activity (2.0 × 10−10 mol mg−1 min−1) than β-Bi2O3 (1.3 × 10−10 mol mg−1 min−1) and the mixture CN/β-Bi2O3 (1.6 × 10−10 mol mg−1 min−1). Reference samples with CN particles partially embedded in the polymer fleece showed minor degradaton rates (18% RhB degradation within 8 h) as compared to coated fiber substrates (47% RhB degradation within 8 h). Minor leaching of the carbon nitride material and no leaching of β-Bi2O3 occurs as shown by NPOC (non purgeable organic carbon) and ICP-MS measurements.
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Wang L, Li Y, Han P. Electrospinning preparation of g-C 3N 4/Nb 2O 5 nanofibers heterojunction for enhanced photocatalytic degradation of organic pollutants in water. Sci Rep 2021; 11:22950. [PMID: 34824312 PMCID: PMC8617280 DOI: 10.1038/s41598-021-02161-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Accepted: 11/10/2021] [Indexed: 11/17/2022] Open
Abstract
In this study, graphitic carbon nitride (g-C3N4) and niobium pentoxide nanofibers (Nb2O5 NFs) heterojunction was prepared by means of a direct electrospinning approach combined with calcination process. The characterizations confirmed a well-defined morphology of the g-C3N4/Nb2O5 heterojunction in which Nb2O5 NFs were tightly attached onto g-C3N4 nanosheets. Compared to pure g-C3N4 and Nb2O5 NFs, the as-prepared g-C3N4/Nb2O5 heterojunction exhibited remarkably enhanced photocatalytic activity for degradation of rhodamine B and phenol under visible light irradiation. The enhanced catalytic activity was attributed predominantly to the synergistic effect between g-C3N4 sheets and Nb2O5 NFs, which promoted the transferring of carriers and prohibited their recombination, confirmed by the measurement of transient photocurrent responses and photoluminescence spectra. In addition, the active species trapping experiments indicated that superoxide radical anion (·O2–) and hole (h+) were the major active species contributing to the photocatalytic process. With its high efficacy and ease of preparation, g-C3N4/Nb2O5 heterojunction has great potentials for applications in treatment of organic pollutants and conversion of solar energy.
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Affiliation(s)
- Lu Wang
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, 211816, China.,Nantong Vocational University, Nantong, 226007, China
| | - Ya Li
- Nantong College of Science and Technology, Nantong, 226007, China
| | - Pingfang Han
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, 211816, China.
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Zhang L, Wei C, Tang H, Wang H, Bian Z. Construction of heterojunction photoanode via facile synthesis of CoOx/CN nanocomposites for enhanced visible-light-driven photoelectrochemical degradation of clofibric acid. CHEMOSPHERE 2021; 281:130825. [PMID: 34000657 DOI: 10.1016/j.chemosphere.2021.130825] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Revised: 05/04/2021] [Accepted: 05/07/2021] [Indexed: 06/12/2023]
Abstract
Visible-light-driven photoelectrocatalytic (PEC) oxidation has been explored extensively to develop highly active materials. Herein, a visible-light-active p-Co3O4 and n-g-C3N4 heterojunction (CoOx/CN) photoanode, constructed by simple one-pot calcination, was shown to remove clofibric acid (CA) from water through a PEC process. Compared with pristine g-C3N4, the optimal photoanode (15%-CoOx/CN) exhibited stable and effective PEC performance and CA degradation performance, a 100-fold enhancement in photocurrent density, and around 1.5-fold decreased efficiency over 6 h. The p-n heterojunctions were shown to increased the charge density and conductivity of g-C3N4 for rapid charge transfer. Furthermore, interface contact broadened the visible light absorption and accelerated charge carrier transfer. Notably, the catalysts established p-n heterojunctions, which hindered the bulk recombination of photoinduced carriers and improved the charge separation efficiency. The CoOx/CN photoanodes showed a pair of redox peaks at a potential of 0.3 V vs. Ag/AgCl, indicating good Co3O4 redox behavior under alkaline conditions. The 15%-CoOx/CN photoanode displayed excellent PEC performance of up to 0.16 mA cm-2 in 0.1 M KOH solution at 1.23 V vs. RHE (reversible hydrogen electrode) and long-term stability for up to 12 h. The CoOx/CN photoanodes maintained excellent PEC activities for CA removal, even under acidic and alkaline conditions conditions (pH 3-10). Probable degradation pathway of CA was proposed according to the main degradation intermediates. This study shows that the synergistic effect of p-n heterojunctions in photoelectrodes provides a new approach to the rational application of new photoanode candidates and PEC performance optimization.
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Affiliation(s)
- Lu Zhang
- College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, PR China
| | - Ci Wei
- College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, PR China
| | - Hanyu Tang
- College of Water Sciences, Beijing Normal University, Beijing, 100875, PR China
| | - Hui Wang
- College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, PR China.
| | - Zhaoyong Bian
- College of Water Sciences, Beijing Normal University, Beijing, 100875, PR China.
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Raza W, Ahmad K. Visible Light-Driven Photocatalysts for Environmental Applications Based on Graphitic Carbon Nitride. HANDBOOK OF NANOMATERIALS AND NANOCOMPOSITES FOR ENERGY AND ENVIRONMENTAL APPLICATIONS 2021. [DOI: 10.1007/978-3-030-36268-3_200] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
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13
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Superior photoelectrocatalytic performance of ternary structural BiVO 4/GQD/g-C 3N 4 heterojunction. J Colloid Interface Sci 2020; 586:785-796. [PMID: 33198982 DOI: 10.1016/j.jcis.2020.11.003] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Revised: 10/28/2020] [Accepted: 11/01/2020] [Indexed: 11/23/2022]
Abstract
Herein, we performed an encyclopedic analysis on the photoelectrocatalytic hydrogen production of BiVO4/g-C3N4 decorated with reduced graphene oxide (RGO) or graphene quantum dots (GQDs). The differences between RGO and GQDs as an electron mediator was revealed for the first time in the perspective of theoretical DFT analysis and experimental validation. It was found that the incorporation of GQDs as an electron mediator promotes better photoelectrocatalytic hydrogen performance in comparison to the RGO. The addition of GQD can significantly improve the activity by 25.2 and 75.7% in comparison to the BiVO4/RGO/g-C3N4 and binary composite samples, respectively. Correspondingly, the BiVO4/GQD/g-C3N4 attained the highest photocurrent density of 19.2 mA/cm2 with an ABPE of 0.57% without the presence of any sacrificial reagents. This enhancement is stemming from the low photocharge carrier transfer resistance which was further verified via DFT study. The DFT analysis revealed that the BiVO4/GQD/g-C3N4 sample shared their electronic cloud density through orbital hybridization while the BiVO4/RGO/g-C3N4 sample show less mutual sharing. Additionally, the charge redistribution of the GQDs-composite at the heterostructure interface articulates a more stable and stronger heterojunction than the RGO-composite. Notably, this study provides new insights on the effect of different carbonaceous materials (RGO and GQDs) which are often used as an electron mediator to enhance photocatalytic activity.
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14
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Sariket D, Ray D, Baduri S, Ghosh S, Maity A, Bhattacharya C. Synthesis of g‐C
3
N
4
/InVO
4
Semiconductor for Improved Photocatalytic and Photoelectrochemical Applications. ELECTROANAL 2020. [DOI: 10.1002/elan.202060161] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Debasis Sariket
- Department of Chemistry Indian Institute of Engineering Science & Technology, (IIEST) Shibpur, Howrah 711103 West Bengal INDIA
| | - Debasish Ray
- Department of Chemistry Indian Institute of Engineering Science & Technology, (IIEST) Shibpur, Howrah 711103 West Bengal INDIA
| | - Swarnendu Baduri
- Department of Chemistry Indian Institute of Engineering Science & Technology, (IIEST) Shibpur, Howrah 711103 West Bengal INDIA
| | - Sangeeta Ghosh
- Department of Chemistry Indian Institute of Engineering Science & Technology, (IIEST) Shibpur, Howrah 711103 West Bengal INDIA
| | - Arjun Maity
- DST/CSIR National Centre for Nanostructured Materials Council for Scientific and Industrial Research, Pretoria-0001 South Africa
- Department of Applied Chemistry University of Johannesburg South Africa
| | - Chinmoy Bhattacharya
- Department of Chemistry Indian Institute of Engineering Science & Technology, (IIEST) Shibpur, Howrah 711103 West Bengal INDIA
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15
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Arzaee NA, Mohamad Noh MF, Mohd Ita NSH, Mohamed NA, Mohd Nasir SNF, Nawas Mumthas IN, Ismail AF, Mat Teridi MA. Nanostructure-assisted charge transfer in α-Fe 2O 3/g-C 3N 4 heterojunctions for efficient and highly stable photoelectrochemical water splitting. Dalton Trans 2020; 49:11317-11328. [PMID: 32760991 DOI: 10.1039/d0dt00683a] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
The development of semiconductor heterojunctions is a promising and yet challenging strategy to boost the performance in photoelectrochemical (PEC) water splitting. This paper describes the fabrication of a heterojunction photoanode by coupling α-Fe2O3 and g-C3N4via aerosol-assisted chemical vapour deposition (AACVD) followed by spin coating and air annealing. Enhanced PEC performance and stability are observed for the α-Fe2O3/g-C3N4 heterojunction photoanode in comparison to pristine α-Fe2O3 and the reason is systematically discussed in this paper. Most importantly, the fabricated α-Fe2O3/g-C3N4 film shows impressive stability, retaining more than 90% of the initial current over 12 h operating time. The excellent stability of the heterojunction photoanode is achieved due to the unique nanoflake structure of α-Fe2O3 induced by AACVD. This nanostructure promotes good adhesion with the g-C3N4 particles, as the particles tend to be trapped within the α-Fe2O3 valleys and eventually create strong and large interfacial contacts. This leads to improved separation of charge carriers at the α-Fe2O3/g-C3N4 interface and suppression of charge recombination in the photoanode, which are confirmed by the transient decay time, charge transfer efficiency and electrochemical impedance analysis. Our findings demonstrate the importance of nanostructure engineering for developing heterojunction structures with efficient charge transfer dynamics.
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Affiliation(s)
- Nurul Affiqah Arzaee
- Solar Energy Research Institute, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia.
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16
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Synthesis of g-C3N4/BiVO4 and Its Photocatalytic Performance for Hydrogen Production. ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING 2020. [DOI: 10.1007/s13369-020-04399-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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17
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Semiconductor Electrode Materials Applied in Photoelectrocatalytic Wastewater Treatment—an Overview. Catalysts 2020. [DOI: 10.3390/catal10040439] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Industrial sources of environmental pollution generate huge amounts of industrial wastewater containing various recalcitrant organic and inorganic pollutants that are hazardous to the environment. On the other hand, industrial wastewater can be regarded as a prospective source of fresh water, energy, and valuable raw materials. Conventional sewage treatment systems are often not efficient enough for the complete degradation of pollutants and they are characterized by high energy consumption. Moreover, the chemical energy that is stored in the wastewater is wasted. A solution to these problems is an application of photoelectrocatalytic treatment methods, especially when they are coupled with energy generation. The paper presents a general overview of the semiconductor materials applied as photoelectrodes in the treatment of various pollutants. The fundamentals of photoelectrocatalytic reactions and the mechanism of pollutants treatment as well as parameters affecting the treatment process are presented. Examples of different semiconductor photoelectrodes that are applied in treatment processes are described in order to present the strengths and weaknesses of the photoelectrocatalytic treatment of industrial wastewater. This overview is an addition to the existing knowledge with a particular focus on the main experimental conditions employed in the photoelectrocatalytic degradation of various pollutants with the application of semiconductor photoelectrodes.
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18
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Rather RA, Lo IMC. Photoelectrochemical sewage treatment by a multifunctional g-C 3N 4/Ag/AgCl/BiVO 4 photoanode for the simultaneous degradation of emerging pollutants and hydrogen production, and the disinfection of E. coli. WATER RESEARCH 2020; 168:115166. [PMID: 31634707 DOI: 10.1016/j.watres.2019.115166] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2019] [Revised: 10/02/2019] [Accepted: 10/06/2019] [Indexed: 05/03/2023]
Abstract
This study describes the photoelectrochemical (PEC) treatment of authentic sewage from Hong Kong for H2 production and degradation of emerging pollutants (EP's) simultaneously, and disinfection of E. coli. The g-C3N4/Ag/AgCl/BiVO4 (CAB-1) coated thin film acted as the photoanode in a three-electrode configuration PEC cell and real sewage as the electrolyte. Electrochemical studies revealed the near reversible, diffusion-controlled and high electron transfer reaction at the electrode-electrolyte surface. For CAB-1, the achieved photocurrent density was 0.1-0.2 mA cm-2 at 1.23 V vs. RHE exhibiting the highest PEC degradation efficiency (11.15% h-1 cm-2) compared to other base materials like g-C3N4/BiVO4 (6.88% h-1 cm-2) or Ag/AgCl/BiVO4 (4.06% h-1 cm-2). During the same reaction, the evolved 118 μmol of H2 gas corresponds to a Faradic efficiency of 69.38%. The composition of sewage was found to influence the overall PEC efficiency. The higher amount of total suspended solids, turbidity, and anionic species decreased the efficiency while as the other parameters like alkaline pH increased the PEC efficiency. Photo-electrochemically, the CAB-1 also effectively disinfected the E. coli present in the sewage with a final discharge of ≤1000 CFU/mL which is within the permissible discharge limits (≤1500 CFU/mL), in Hong Kong.
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Affiliation(s)
- Rayees Ahmad Rather
- Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Hong Kong, China
| | - Irene M C Lo
- Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Hong Kong, China; Institute for Advanced Study (IAS), The Hong Kong University of Science and Technology, Hong Kong, China.
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19
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Li Y, Bu Y, Jiang F, Dai X, Ao JP. Fabrication of ultra-sensitive photoelectrochemical aptamer biosensor: Based on semiconductor/DNA interfacial multifunctional reconciliation via 2D-C 3N 4. Biosens Bioelectron 2019; 150:111903. [PMID: 31791875 DOI: 10.1016/j.bios.2019.111903] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Revised: 11/04/2019] [Accepted: 11/17/2019] [Indexed: 12/23/2022]
Abstract
In this work, we fabricate a novel bismuth vanadate/two dimensional-carbon nitride/deoxyribonucleic acid (BiVO4/2D-C3N4/DNA) aptamer photoelectrochemical (PEC) sensor, and this sensor provides a record detection sensitivity area (5 × 10-7 μg/L - 10 μg/L) for Microcystin-LR (MC-LR). Meanwhile, except for MC-LR detection, this sensor presents highly sensitivity for tumor marker, heavy metal ion, antibiotic also by changing the DNA aptamer. Photo charge dynamic and theory calculation results reveal that 2D-C3N4 is a key material for multifunctional interface reconciliation of this PEC aptamer sensor. Firstly, it can serve as photogenerated hole oriented-transfer medium from the BiVO4 photoanode to the detective target; In addition, 2D-C3N4 with large area of π electron cloud can fix the DNA aptamer parallelly by π-π bonding with the nucleic acid in the DNA aptamer to shorten the hole transfer distance from the semiconductor to target. So that, a record MC-LR detection sensitivity has been achieved by the 2D-C3N4 modified BiVO4/DNA aptamer sensor.
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Affiliation(s)
- Yang Li
- Key Laboratory of Wide Band-Gap Semiconductor Materials and Devices, School of Microelectronics, Xidian University, Xi'an, 710071, China
| | - Yuyu Bu
- Key Laboratory of Wide Band-Gap Semiconductor Materials and Devices, School of Microelectronics, Xidian University, Xi'an, 710071, China.
| | - Fengqiu Jiang
- Key Laboratory of Wide Band-Gap Semiconductor Materials and Devices, School of Microelectronics, Xidian University, Xi'an, 710071, China
| | - Xianying Dai
- Key Laboratory of Wide Band-Gap Semiconductor Materials and Devices, School of Microelectronics, Xidian University, Xi'an, 710071, China.
| | - Jin-Ping Ao
- Key Laboratory of Wide Band-Gap Semiconductor Materials and Devices, School of Microelectronics, Xidian University, Xi'an, 710071, China
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20
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Prakash J, Prasad U, Alexander R, Bahadur J, Dasgupta K, Kannan ANM. Photoelectrochemical Solar Water Splitting: The Role of the Carbon Nanomaterials in Bismuth Vanadate Composite Photoanodes toward Efficient Charge Separation and Transport. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:14492-14504. [PMID: 31618038 DOI: 10.1021/acs.langmuir.9b02782] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Photoelectrochemical performance of bismuth vanadate (BiVO4) photoanode is limited by poor charge separation and transport properties. The roles of carbon nanotube, reduced graphene oxide, or graphitic carbon nitride in BiVO4 composite photoanode were investigated toward enhancing light absorption and reducing overall impedance during photoelectrochemical water oxidation process. X-ray diffraction and Tauc analysis showed that BiVO4 retains its monoclinic phase, n-type semiconductor nature, and band gap in all carbon nanomaterials-incorporated composite photoanodes. It was observed that the carbon nanomaterials incorporation in BiVO4 film increases its surface porosity, ultimately leading to enhanced light absorption. The BiVO4 photoanode with reduced graphene oxide and graphitic carbon nitride showed same bulk charge separation efficiency, whereas the latter showed better charge transfer. It was found that the graphitic carbon nitride formed composite with BiVO4 to provide enhanced light absorption efficiency, i.e., 89% in 350-505 nm range. The BiVO4 with graphitic carbon nitride photoanode showed the best performance with a photocurrent of 2.2 mA cm-2, charge separation efficiency of 67%, and photocurrent of 4.0 mA cm-2 with cobalt-phosphate surface catalyst at 1.23 VRHE for water oxidation under 1 sun illumination. The Mott-Schottky and impedance measurements confirmed the shift of conduction band position toward hydrogen reduction potential and reduction in film resistance, respectively, with carbon nanomaterials addition, and the shift was most significant for graphitic carbon nitride. It is concluded that by concomitant formation of junction during photoanode fabrication between carbon nanomaterials, BiVO4, and fluorine-doped tin oxide glass substrate, better charge separation, transport, and light absorption can be achieved.
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Affiliation(s)
- Jyoti Prakash
- The Polytechnic School, Ira. A. Fulton Schools of Engineering , Arizona State University , Mesa , Arizona 85212 , United States
| | - Umesh Prasad
- The Polytechnic School, Ira. A. Fulton Schools of Engineering , Arizona State University , Mesa , Arizona 85212 , United States
| | | | | | | | - Arunachala Nadar Mada Kannan
- The Polytechnic School, Ira. A. Fulton Schools of Engineering , Arizona State University , Mesa , Arizona 85212 , United States
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21
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Babu P, Mohanty S, Naik B, Parida K. Serendipitous Assembly of Mixed Phase BiVO4 on B-Doped g-C3N4: An Appropriate p–n Heterojunction for Photocatalytic O2 evolution and Cr(VI) reduction. Inorg Chem 2019; 58:12480-12491. [DOI: 10.1021/acs.inorgchem.9b02309] [Citation(s) in RCA: 63] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Pradeepta Babu
- Centre for Nanoscience and Nanotechnology, Siksha ‘O’ Anusandhan, Bhubaneswar 751030, India
| | - Satyaranjan Mohanty
- Centre for Nanoscience and Nanotechnology, Siksha ‘O’ Anusandhan, Bhubaneswar 751030, India
| | - Brundabana Naik
- Centre for Nanoscience and Nanotechnology, Siksha ‘O’ Anusandhan, Bhubaneswar 751030, India
| | - Kulamani Parida
- Centre for Nanoscience and Nanotechnology, Siksha ‘O’ Anusandhan, Bhubaneswar 751030, India
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22
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Le S, Li W, Wang Y, Jiang X, Yang X, Wang X. Carbon dots sensitized 2D-2D heterojunction of BiVO 4/Bi 3TaO 7 for visible light photocatalytic removal towards the broad-spectrum antibiotics. JOURNAL OF HAZARDOUS MATERIALS 2019; 376:1-11. [PMID: 31096108 DOI: 10.1016/j.jhazmat.2019.04.088] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2019] [Revised: 04/28/2019] [Accepted: 04/30/2019] [Indexed: 06/09/2023]
Abstract
Focused on the removal of the complicated residual antibiotic in aqueous environment, in this work, a novel carbon dots (C-dots) sensitized 2D-2D heterojunction of BiVO4/Bi3TaO7 were assembled through a simple hydrothermal process. The characteristic by TEM, SEM, and XPS confirmed C-dots evenly anchored on the surface of BiVO4/Bi3TaO7 heterojunction. The as-prepared C-dots/BiVO4/Bi3TaO7 showed superior performance for the degradation of the various antibiotics under visible light illumination. When the concentration of C-dots in the composite is 3 wt.%, the photodegraded rates are obtained to be 91.7%, 89.3%, 87.1%, for tetracycline (TC), amoxicillin (AMX) and ciprofloxacin (CIP), respectively, without significant deactivation during consecutive ten recycle experiments. Furthermore, by assessing the antibiotics mixture solution of TC, AMX and CIP, it is proposed that the prepared samples are potentially effective for the wastewater effluents. A probable mechanism was reasonably proposed. The improved photocatalytic activities could be attributed to the unique construction of the C-dots mediated heterojunction, which could expedite electron migration, improve light harvesting capacity and enhance charge separation efficiency. The present investigation may provide a new perspective to design C-dots mediated heterojunction which could be a potential visible-light-driven photocatalysts for the better practical applications in remediation of broad-spectrum antibiotic residues.
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Affiliation(s)
- Shukun Le
- Inner Mongolia Key Laboratory of Chemistry and Physics of Rare Earth Materials, School of Chemistry and Chemical Engineering, Inner Mongolia University, Huhhot, Inner Mongolia, China
| | - Wenjing Li
- Inner Mongolia Key Laboratory of Chemistry and Physics of Rare Earth Materials, School of Chemistry and Chemical Engineering, Inner Mongolia University, Huhhot, Inner Mongolia, China
| | - Yuanjiang Wang
- Inner Mongolia Key Laboratory of Chemistry and Physics of Rare Earth Materials, School of Chemistry and Chemical Engineering, Inner Mongolia University, Huhhot, Inner Mongolia, China
| | - Xue Jiang
- Inner Mongolia Key Laboratory of Chemistry and Physics of Rare Earth Materials, School of Chemistry and Chemical Engineering, Inner Mongolia University, Huhhot, Inner Mongolia, China
| | - Xiaoxue Yang
- Inner Mongolia Key Laboratory of Chemistry and Physics of Rare Earth Materials, School of Chemistry and Chemical Engineering, Inner Mongolia University, Huhhot, Inner Mongolia, China
| | - Xiaojing Wang
- Inner Mongolia Key Laboratory of Chemistry and Physics of Rare Earth Materials, School of Chemistry and Chemical Engineering, Inner Mongolia University, Huhhot, Inner Mongolia, China.
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23
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Padhiari S, Hota G. A Ag nanoparticle functionalized Sg-C 3N 4/Bi 2O 3 2D nanohybrid: a promising visible light harnessing photocatalyst towards degradation of rhodamine B and tetracycline. NANOSCALE ADVANCES 2019; 1:3212-3224. [PMID: 36133610 PMCID: PMC9417822 DOI: 10.1039/c9na00172g] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2019] [Accepted: 07/02/2019] [Indexed: 06/11/2023]
Abstract
In the present work, S doped graphitic carbon nitride (Sg-C3N4) 2D nanosheets were synthesized by performing a thermal polymerization reaction of thiourea at 500 °C. After that the surface of Sg-C3N4 was functionalized with Bi2O3/Ag composite nanoparticles via a chemical precipitation method followed by heat treatment at 330 °C. The prepared Sg-C3N4/Bi2O3/Ag ternary nanocomposites were used as a visible light active photocatalyst for catalytic degradation of rhodamine B (RhB) dye and tetracycline hydrochloride, under natural solar light. The prepared ternary nanocomposites were characterized by using UV-Vis DRS, FT-IR, FESEM, EDX, TEM, XRD, photoluminescence (PL), electrochemical impedance spectroscopy and XPS analytical techniques. The XRD, UV-Vis DRS and FT-IR studies clearly revealed the formation of ternary phases in the composites. From the TEM and EDX studies it was clearly observed that spherical Ag nanoparticles (5-10 nm) and irregular Bi2O3 particles (60-120 nm) were decorated on the surface of 2D S doped g-C3N4 nanosheets. XPS studies also confirmed the formation of the ternary nanocomposite system. The results from the photocatalytic degradation of RhB dye revealed that 95% of the RhB dye was decolorized within 90 min of contact time by Sg-C3N4/Bi2O3/Ag ternary nanocomposites under natural solar light. Among the different prepared photocatalysts, Sg-C3N4/Bi2O3/Ag (15%) was found to be the most efficient photocatalyst towards the decolourization of RhB dye. This result is ascribed to the optimum loading of Ag, formation of a hetero-junction between the ternary phases, more light harvesting capacity and the lowest recombination rate of charge carriers. Apart from the coloured RhB dye, the photocatalytic degradation of the non-coloured tetracycline hydrochloride (TCH) compound was also studied to understand the photosensitization effect on the degradation process. Again scavenger studies were also performed in order to understand the mechanism of photodegradation. It was observed that along with the electron and hole pairs generated by light photons, hydroxide radicals play an important role in the degradation mechanism. The reusability study indicates that the photocatalysts prepared were highly stable at room temperature and can be recycled and reused for up to four successful cycles without a major loss in their performance.
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Affiliation(s)
- Sandip Padhiari
- Department of Chemistry, NIT Rourkela Odisha India 769008 +91-661-2462022 +91-661-2462655
| | - G Hota
- Department of Chemistry, NIT Rourkela Odisha India 769008 +91-661-2462022 +91-661-2462655
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24
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Murugan C, Abinav Nataraj R, Praveen Kumar M, Ravichandran S, Pandikumar A. Enhanced Charge Transfer Process of Bismuth Vanadate Interleaved Graphitic Carbon Nitride Nanohybrids in Mediator‐Free Direct Z Scheme Photoelectrocatalytic Water Splitting. ChemistrySelect 2019. [DOI: 10.1002/slct.201900732] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Chinnan Murugan
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad– 201002 India
- Functional Materials DivisionCSIR-Central Electrochemical Research Institute,Karaikudi– 630 003 Tamil Nadu India
| | | | - Murugesan Praveen Kumar
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad– 201002 India
- Electro-Inorganic Chemicals DivisionCSIR-Central Electrochemical Research Institute, Karaikudi– 630 003 Tamil Nadu India
| | - Subbiah Ravichandran
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad– 201002 India
- Electro-Inorganic Chemicals DivisionCSIR-Central Electrochemical Research Institute, Karaikudi– 630 003 Tamil Nadu India
| | - Alagarsamy Pandikumar
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad– 201002 India
- Functional Materials DivisionCSIR-Central Electrochemical Research Institute,Karaikudi– 630 003 Tamil Nadu India
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25
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Li J, Wang Y, Zhao S, Jan AK, Zhang X, Zhao X. Electrospun nanostructured Co3O4/BiVO4 composite films for photoelectrochemical applications. J Colloid Interface Sci 2019; 539:442-447. [DOI: 10.1016/j.jcis.2018.12.081] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Revised: 12/19/2018] [Accepted: 12/20/2018] [Indexed: 01/08/2023]
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26
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Volokh M, Peng G, Barrio J, Shalom M. Carbon Nitride Materials for Water Splitting Photoelectrochemical Cells. Angew Chem Int Ed Engl 2019; 58:6138-6151. [PMID: 30020555 DOI: 10.1002/anie.201806514] [Citation(s) in RCA: 95] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2018] [Indexed: 01/07/2023]
Abstract
Graphitic carbon nitride materials (CNs) have emerged as suitable photocatalysts and heterogeneous catalysts for various reactions thanks to their tunable band gap, suitable energy-band position, high stability under harsh chemical conditions, and low cost. However, the utilization of CN in photoelectrochemical (PEC) and photoelectronic devices is still at an early stage owing to the difficulties in depositing high-quality and homogenous CN layer on substrates, its wide band gap, poor charge-separation efficiency, and low electronic conductivity. In this Minireview, we discuss the synthetic pathways for the preparation of various structures of CN on substrates and their underlying photophysical properties and current photoelectrochemical performance. The main challenges for CN incorporation into PEC cell are described, together with possible routes to overcome the standing limitations toward the integration of CN materials in PEC and other photoelectronic devices.
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Affiliation(s)
- Michael Volokh
- Department of Chemistry and Ilse Katz Institute for Nanoscale Science and Technology, Ben-Gurion University of the Negev, Beer-Sheva, 8410501, Israel
| | - Guiming Peng
- Department of Chemistry and Ilse Katz Institute for Nanoscale Science and Technology, Ben-Gurion University of the Negev, Beer-Sheva, 8410501, Israel
| | - Jesús Barrio
- Department of Chemistry and Ilse Katz Institute for Nanoscale Science and Technology, Ben-Gurion University of the Negev, Beer-Sheva, 8410501, Israel
| | - Menny Shalom
- Department of Chemistry and Ilse Katz Institute for Nanoscale Science and Technology, Ben-Gurion University of the Negev, Beer-Sheva, 8410501, Israel
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27
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Volokh M, Peng G, Barrio J, Shalom M. Kohlenstoffnitridmaterialien für photochemische Zellen zur Wasserspaltung. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201806514] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Michael Volokh
- Department of Chemistry and Ilse Katz Institute for Nanoscale Science and TechnologyBen-Gurion University of the Negev Beer-Sheva 8410501 Israel
| | - Guiming Peng
- Department of Chemistry and Ilse Katz Institute for Nanoscale Science and TechnologyBen-Gurion University of the Negev Beer-Sheva 8410501 Israel
| | - Jesús Barrio
- Department of Chemistry and Ilse Katz Institute for Nanoscale Science and TechnologyBen-Gurion University of the Negev Beer-Sheva 8410501 Israel
| | - Menny Shalom
- Department of Chemistry and Ilse Katz Institute for Nanoscale Science and TechnologyBen-Gurion University of the Negev Beer-Sheva 8410501 Israel
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28
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Li C, Che H, Liu C, Che G, Charpentier PA, Xu WZ, Wang X, Liu L. Facile fabrication of g-C3N4 QDs/BiVO4 Z-scheme heterojunction towards enhancing photodegradation activity under visible light. J Taiwan Inst Chem Eng 2019. [DOI: 10.1016/j.jtice.2018.10.011] [Citation(s) in RCA: 66] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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29
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Sun Z, Yu Z, Liu Y, Shi C, Zhu M, Wang A. Construction of 2D/2D BiVO4/g-C3N4 nanosheet heterostructures with improved photocatalytic activity. J Colloid Interface Sci 2019; 533:251-258. [DOI: 10.1016/j.jcis.2018.08.071] [Citation(s) in RCA: 78] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2018] [Revised: 08/14/2018] [Accepted: 08/22/2018] [Indexed: 02/08/2023]
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30
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Lv Z, Cheng X, Liu B, Guo Z, Jin M, Zhang C. Enhanced photoredox water splitting of Sb–N donor–acceptor pairs in TiO2. Inorg Chem Front 2019. [DOI: 10.1039/c9qi00511k] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The development of noble-metal-free TiO2-based catalysts is of significant interest for photoredox H2 production.
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Affiliation(s)
- Zhiguo Lv
- State Key Laboratory Base for Eco-chemical Engineering
- Key Laboratory of Multiphase Flow Reaction and Separation Engineering of Shandong Province
- College of Chemical Engineering
- Qingdao University of Science and Technology
- Qingdao 266042
| | - Xi Cheng
- State Key Laboratory Base for Eco-chemical Engineering
- Key Laboratory of Multiphase Flow Reaction and Separation Engineering of Shandong Province
- College of Chemical Engineering
- Qingdao University of Science and Technology
- Qingdao 266042
| | - Baoquan Liu
- State Key Laboratory Base for Eco-chemical Engineering
- Key Laboratory of Multiphase Flow Reaction and Separation Engineering of Shandong Province
- College of Chemical Engineering
- Qingdao University of Science and Technology
- Qingdao 266042
| | - Zhenmei Guo
- College of Marine Science and Biological Engineering
- Qingdao University of Science and Technology
- Qingdao 266042
- China
| | - Manman Jin
- State Key Laboratory Base for Eco-chemical Engineering
- Key Laboratory of Multiphase Flow Reaction and Separation Engineering of Shandong Province
- College of Chemical Engineering
- Qingdao University of Science and Technology
- Qingdao 266042
| | - Chao Zhang
- State Key Laboratory Base for Eco-chemical Engineering
- Key Laboratory of Multiphase Flow Reaction and Separation Engineering of Shandong Province
- College of Chemical Engineering
- Qingdao University of Science and Technology
- Qingdao 266042
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31
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Switching charge transfer process of carbon nitride and bismuth vanadate by anchoring silver nanoparticle toward cocatalyst free water reduction. J Colloid Interface Sci 2018; 529:375-384. [DOI: 10.1016/j.jcis.2018.06.029] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2018] [Revised: 06/13/2018] [Accepted: 06/14/2018] [Indexed: 11/23/2022]
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32
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Cui P, Hu Y, Zheng M, Wei C. Enhancement of visible-light photocatalytic activities of BiVO 4 coupled with g-C 3N 4 prepared using different precursors. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:32466-32477. [PMID: 30238256 DOI: 10.1007/s11356-018-3119-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2018] [Accepted: 08/31/2018] [Indexed: 06/08/2023]
Abstract
Graphitic-like carbon nitride (g-C3N4) photocatalyst was synthesized by a facile chemical pyrolysis method, which was built on the self-condensation of different precursors to generate g-C3N4, e.g., melamine, urea, and thiocarbamide. And the different precursors produced a great influence on the photocatalytic activities of g-C3N4. Heterojunctions of g-C3N4 and BiVO4 were synthesized using a facile solvent evaporation method. The formation of BiVO4/g-C3N4 composites were confirmed by XRD, FT-IR, SEM, XPS, and UV-Vis DRS. The photocatalytic activities for RhB degradation were evaluated under visible-light irradiation. The photocatalytic activity of g-C3N4 prepared by urea was higher than that of g-C3N4 prepared by melamine and thiocarbamide, which was attributed to its favorable dispersibility, larger specific surface area, and higher oxidation capacity. The heterojunction composites exhibited higher photocatalytic activity than pure g-C3N4 or BiVO4. The results showed obvious removal efficiency for RhB, and the optimal sample with a BiVO4 content of 10% exhibited higher efficiency than pure g-C3N4 and BiVO4, and 10 wt%BiVO4/CN-U showed the highest photocatalytic activity. The enhanced photocatalytic activity of BiVO4/g-C3N4 composite can be attributed to the intimate coupling between the two host substrates, resulting in an efficient charge separation.
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Affiliation(s)
- Peipei Cui
- Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, School of Environment and Energy, South China University of Technology, Guangzhou, 510006, People's Republic of China
| | - Yun Hu
- Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, School of Environment and Energy, South China University of Technology, Guangzhou, 510006, People's Republic of China.
- The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou, 510006, People's Republic of China.
| | - Mengmeng Zheng
- Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, School of Environment and Energy, South China University of Technology, Guangzhou, 510006, People's Republic of China
| | - Chaohai Wei
- Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, School of Environment and Energy, South China University of Technology, Guangzhou, 510006, People's Republic of China
- The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou, 510006, People's Republic of China
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33
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Samsudin MFR, Sufian S, Hameed B. Epigrammatic progress and perspective on the photocatalytic properties of BiVO4-based photocatalyst in photocatalytic water treatment technology: A review. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2018.07.051] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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34
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High charge transfer response of g-C3N4/Ag/AgCl/BiVO4 microstructure for the selective photocatalytic reduction of CO2 to CH4 under alkali activation. J Catal 2018. [DOI: 10.1016/j.jcat.2018.07.027] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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35
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Zhang Y, Wang M, Yang G, Qi Y, Chai T, Li S, Zhu T. Novel binary of g-C 3 N 4 coupling and Eu 3+ doping co-modifying bidirectional dendritic BiVO 4 heterojunctions with enhanced visible-light photocatalytic performance. Sep Purif Technol 2018. [DOI: 10.1016/j.seppur.2018.04.013] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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36
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Zhang C, Zhou Y, Bao J, Sheng X, Fang J, Zhao S, Zhang Y, Chen W. Hierarchical Honeycomb Br-, N-Codoped TiO 2 with Enhanced Visible-Light Photocatalytic H 2 Production. ACS APPLIED MATERIALS & INTERFACES 2018; 10:18796-18804. [PMID: 29745646 DOI: 10.1021/acsami.8b04947] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The halogen elements modification strategy of TiO2 encounters a bottleneck in visible-light H2 production. Herein, we have for the first time reported a hierarchical honeycomb Br-, N-codoped anatase TiO2 catalyst (HM-Br,N/TiO2) with enhanced visible-light photocatalytic H2 production. During the synthesizing process, large amounts of meso-macroporous channels and TiO2 nanosheets were fabricated in massive TiO2 automatically, constructing the hierarchical honeycomb structure with large specific surface area (464 m2 g-1). cetyl trimethylammonium bromide and melamine played a key role in constructing the meso-macroporous channels. Additionally, HM-Br,N/TiO2 showed a high visible-light H2 production rate of 2247 μmol h-1 g-1, which is far more higher than single Br- or N-doped TiO2 (0 or 63 μmol h-1 g-1, respectively), thereby demonstrating the excellent synergistic effects of Br and N elements in H2 evolution. In HM-Br,N/TiO2 catalytic system, the codoped Br-N atoms could reduce the band gap of TiO2 to 2.88 eV and the holes on acceptor levels (N acceptor) can passivate the electrons on donor levels (Br donor), thereby preventing charge carriers recombination significantly. Furthermore, the proposed HM-Br,N/TiO2 fabrication strategy had a wide range of choices for N source (e.g., melamine, urea, and dicyandiamide) and it can be applied to other TiO2 materials (e.g., P25) as well, thereby implying its great potential application in visible-light H2 production. Finally, on the basis of experimental results, a possible photocatalytic H2 production mechanism for HM-Br,N/TiO2 was proposed.
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Affiliation(s)
- Chao Zhang
- School of Chemistry and Chemical Engineering , Southeast University , Jiangsu Optoelectronic Functional Materials and Engineering Laboratory , Nanjing 211189 , China
| | - Yuming Zhou
- School of Chemistry and Chemical Engineering , Southeast University , Jiangsu Optoelectronic Functional Materials and Engineering Laboratory , Nanjing 211189 , China
| | - Jiehua Bao
- School of Chemistry and Chemical Engineering , Southeast University , Jiangsu Optoelectronic Functional Materials and Engineering Laboratory , Nanjing 211189 , China
| | - Xiaoli Sheng
- School of Chemistry and Chemical Engineering , Southeast University , Jiangsu Optoelectronic Functional Materials and Engineering Laboratory , Nanjing 211189 , China
| | - Jiasheng Fang
- School of Chemistry and Chemical Engineering , Southeast University , Jiangsu Optoelectronic Functional Materials and Engineering Laboratory , Nanjing 211189 , China
| | - Shuo Zhao
- School of Chemistry and Chemical Engineering , Southeast University , Jiangsu Optoelectronic Functional Materials and Engineering Laboratory , Nanjing 211189 , China
| | - Yiwei Zhang
- School of Chemistry and Chemical Engineering , Southeast University , Jiangsu Optoelectronic Functional Materials and Engineering Laboratory , Nanjing 211189 , China
| | - Wenxia Chen
- School of Chemistry and Chemical Engineering , Southeast University , Jiangsu Optoelectronic Functional Materials and Engineering Laboratory , Nanjing 211189 , China
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37
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Patnaik S, Swain G, Parida KM. Highly efficient charge transfer through a double Z-scheme mechanism by a Cu-promoted MoO 3/g-C 3N 4 hybrid nanocomposite with superior electrochemical and photocatalytic performance. NANOSCALE 2018; 10:5950-5964. [PMID: 29542755 DOI: 10.1039/c7nr09049h] [Citation(s) in RCA: 96] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Herein, a novel Cu-MoO3/g-C3N4 hybrid nanocomposite was successfully synthesized by a two-step strategy of one-pot pyrolysis followed by the impregnation method. The structure, phase, morphology and electronic environment of MoO3, g-C3N4 and Cu in the composite were determined by various characterization methods. The oxygen vacancies of MoO3 were ascertained by UV-DRS, Raman, and XPS analysis. The formation of the heterostructure was characterised by electrochemical measurements. The photocatalytic performance of the composite was investigated by the water reduction reaction and the reduction of an important inorganic pollutant, Cr(vi). In the presence of Cu NPs, the H2 evolution of the MoO3/g-C3N4 hybrid was found to be 652 μmol h-1 with an apparent energy conversion efficiency of 13.46%, and up to 95% of Cr(vi) was reduced using citric acid as a hole scavenger. The remarkably enhanced photocatalytic performance was attributed to the combined effect of the double Z-scheme mechanism and defective MoO3. The in situ formation process of the MoO3/g-C3N4 hybrid followed a direct Z-scheme charge transfer by generating a great number of defects at the solid-solid interface, similar to that of a conductor, and offered low electrical resistance, whereas loading of Cu NPs built up an indirect Z-scheme charge transfer to establish the double Z-scheme charge transfer mechanism. This hybrid material produces a photocurrent density of 12.1 mA cm-2, in good agreement with the photocatalytic activity. This study highlights the facilitation effect of MoO3 due to oxygen vacancies and charge transfer through the double Z-scheme mechanism to open up a new window in the field of 2D nanostructured photocatalytic materials.
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Affiliation(s)
- Sulagna Patnaik
- Centre for Nano Science and Nanotechnology, Siksha O Anusandhan University, Bhubanswar-751030, Odisha, India.
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38
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Qin Z, Fang W, Liu J, Wei Z, Jiang Z, Shangguan W. Zinc-doped g-C3N4/BiVO4 as a Z-scheme photocatalyst system for water splitting under visible light. CHINESE JOURNAL OF CATALYSIS 2018. [DOI: 10.1016/s1872-2067(17)62961-9] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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39
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Jia B, Zhao W, Fan L, Yin G, Cheng Y, Huang F. Silver cyanamide nanoparticles decorated ultrathin graphitic carbon nitride nanosheets for enhanced visible-light-driven photocatalysis. Catal Sci Technol 2018. [DOI: 10.1039/c7cy02325a] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Silver cyanamide nanoparticle decorated carbon nitride nanosheets are synthesized to build up a type-II semiconductor heterojunction for visible-light-driven photocatalysis.
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Affiliation(s)
- Bingquan Jia
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure
- Shanghai Institute of Ceramics
- Chinese Academy of Sciences
- Shanghai 200050
- P.R. China
| | - Wei Zhao
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure
- Shanghai Institute of Ceramics
- Chinese Academy of Sciences
- Shanghai 200050
- P.R. China
| | - Linggang Fan
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure
- Shanghai Institute of Ceramics
- Chinese Academy of Sciences
- Shanghai 200050
- P.R. China
| | - Guoheng Yin
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure
- Shanghai Institute of Ceramics
- Chinese Academy of Sciences
- Shanghai 200050
- P.R. China
| | - Yuan Cheng
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure
- Shanghai Institute of Ceramics
- Chinese Academy of Sciences
- Shanghai 200050
- P.R. China
| | - Fuqiang Huang
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure
- Shanghai Institute of Ceramics
- Chinese Academy of Sciences
- Shanghai 200050
- P.R. China
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40
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Kang S, Jang J, Pawar RC, Ahn SH, Lee CS. Low temperature fabrication of Fe2O3 nanorod film coated with ultra-thin g-C3N4 for a direct z-scheme exerting photocatalytic activities. RSC Adv 2018; 8:33600-33613. [PMID: 35548797 PMCID: PMC9086564 DOI: 10.1039/c8ra04499f] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2018] [Accepted: 09/18/2018] [Indexed: 01/04/2023] Open
Abstract
We engineered high aspect ratio Fe2O3 nanorods (with an aspect ratio of 17 : 1) coated with g-C3N4 using a sequential solvothermal method at very low temperature followed by a thermal evaporation method. Here, the high aspect ratio Fe2O3 nanorods were directly grown onto the FTO substrate under relatively low pressure conditions. The g-C3N4 was coated onto a uniform Fe2O3 nanorod film as the heterostructure, exhibiting rational band conduction and a valence band that engaged in surface photoredox reactions by a direct z-scheme mechanism. The heterostructures, particularly 0.75g-C3N4@Fe2O3 nanorods, exhibited outstanding photocatalytic activities compared to those of bare Fe2O3 nanorods. In terms of 4-nitrophenol degradation, 0.75g-C3N4@Fe2O3 nanorods degraded all of the organic pollutant within 6 h under visible irradiation at a kinetic constant of 12.71 × 10−3 min−1, about 15-fold more rapidly than bare Fe2O3. Further, the hydrogen evolution rate was 37.06 μmol h−1 g−1, 39-fold higher than that of bare Fe2O3. We suggest that electron and hole pairs are efficiently separated in g-C3N4@Fe2O3 nanorods, thus accelerating surface photoreaction via a direct z-scheme under visible illumination. The engineered high aspect ratio of Fe2O3 nanorods coated with g-C3N4 demonstrates z-scheme mechanism, showing the best performance in 4-nitrophenol photodegradation and H2 evolution.![]()
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Affiliation(s)
- Suhee Kang
- Department of Materials and Chemical Engineering
- Hanyang University
- Ansan
- South Korea
| | - Joonyoung Jang
- Department of Materials and Chemical Engineering
- Hanyang University
- Ansan
- South Korea
| | | | - Sung-Hoon Ahn
- Department of Mechanical and Aerospace Engineering
- Seoul National University
- Seoul
- South Korea
| | - Caroline Sunyong Lee
- Department of Materials and Chemical Engineering
- Hanyang University
- Ansan
- South Korea
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41
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Li Y, Zhou Y, Zeng W, Gao S, Wu Y, Yang J. Acid-Exfoliated g-C3
N4
Nanosheets Coated Silver Nanoparticles with Tunable Loading: An Efficient Catalyst for Visible Light Photocatalytic Reaction. ChemistrySelect 2017. [DOI: 10.1002/slct.201702103] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Yi Li
- School of Materials Science and Engineering; Jiangsu University; Zhenjiang, Jiangsu 212013, P.R. China
| | - Yazhou Zhou
- School of Materials Science and Engineering; Jiangsu University; Zhenjiang, Jiangsu 212013, P.R. China
| | - Weiwei Zeng
- School of Materials Science and Engineering; Jiangsu University; Zhenjiang, Jiangsu 212013, P.R. China
| | - Shuai Gao
- School of Materials Science and Engineering; Jiangsu University; Zhenjiang, Jiangsu 212013, P.R. China
| | - Yunyan Wu
- School of Materials Science and Engineering; Jiangsu University; Zhenjiang, Jiangsu 212013, P.R. China
| | - Juan Yang
- School of Materials Science and Engineering; Jiangsu University; Zhenjiang, Jiangsu 212013, P.R. China
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42
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Enhanced photo-electrochemical, photo-degradation and charge separation ability of graphitic carbon nitride (g-C3N4) by self-type metal free heterojunction formation for antibiotic degradation. J Photochem Photobiol A Chem 2017. [DOI: 10.1016/j.jphotochem.2017.08.032] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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