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Wang CY, Chang HE, Wang CY, Kurioka T, Chen CY, Mark Chang TF, Sone M, Hsu YJ. Manipulation of interfacial charge dynamics for metal-organic frameworks toward advanced photocatalytic applications. NANOSCALE ADVANCES 2024; 6:1039-1058. [PMID: 38356624 PMCID: PMC10866133 DOI: 10.1039/d3na00837a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Accepted: 11/15/2023] [Indexed: 02/16/2024]
Abstract
Compared to other known materials, metal-organic frameworks (MOFs) have the highest surface area and the lowest densities; as a result, MOFs are advantageous in numerous technological applications, especially in the area of photocatalysis. Photocatalysis shows tantalizing potential to fulfill global energy demands, reduce greenhouse effects, and resolve environmental contamination problems. To exploit highly active photocatalysts, it is important to determine the fate of photoexcited charge carriers and identify the most decisive charge transfer pathway. Methods to modulate charge dynamics and manipulate carrier behaviors may pave a new avenue for the intelligent design of MOF-based photocatalysts for widespread applications. By summarizing the recent developments in the modulation of interfacial charge dynamics for MOF-based photocatalysts, this minireview can deliver inspiring insights to help researchers harness the merits of MOFs and create versatile photocatalytic systems.
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Affiliation(s)
- Chien-Yi Wang
- Department of Materials Science and Engineering, National Yang Ming Chiao Tung University Hsinchu 300093 Taiwan
| | - Huai-En Chang
- Department of Materials Science and Engineering, National Yang Ming Chiao Tung University Hsinchu 300093 Taiwan
| | - Cheng-Yu Wang
- Department of Materials Science and Engineering, National Yang Ming Chiao Tung University Hsinchu 300093 Taiwan
| | - Tomoyuki Kurioka
- Institute of Innovative Research, Tokyo Institute of Technology Kanagawa 226-8503 Japan
| | - Chun-Yi Chen
- Institute of Innovative Research, Tokyo Institute of Technology Kanagawa 226-8503 Japan
| | - Tso-Fu Mark Chang
- Institute of Innovative Research, Tokyo Institute of Technology Kanagawa 226-8503 Japan
| | - Masato Sone
- Institute of Innovative Research, Tokyo Institute of Technology Kanagawa 226-8503 Japan
| | - Yung-Jung Hsu
- Department of Materials Science and Engineering, National Yang Ming Chiao Tung University Hsinchu 300093 Taiwan
- Center for Emergent Functional Matter Science, National Yang Ming Chiao Tung University Hsinchu 300093 Taiwan
- International Research Frontiers Initiative, Institute of Innovative Research, Tokyo Institute of Technology Kanagawa 226-8503 Japan
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2
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Shahrezaei M, Hejazi SMH, Kmentova H, Sedajova V, Zboril R, Naldoni A, Kment S. Ultrasound-Driven Defect Engineering in TiO 2-x Nanotubes─Toward Highly Efficient Platinum Single Atom-Enhanced Photocatalytic Water Splitting. ACS APPLIED MATERIALS & INTERFACES 2023; 15:37976-37985. [PMID: 37490013 PMCID: PMC10416212 DOI: 10.1021/acsami.3c04811] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Accepted: 07/05/2023] [Indexed: 07/26/2023]
Abstract
Single-atom catalysts (SACs) have demonstrated superior catalytic activity and selectivity compared to nanoparticle catalysts due to their high reactivity and atom efficiency. However, stabilizing SACs within hosting substrates and their controllable loading preventing single atom clustering remain the key challenges in this field. Moreover, the direct comparison of (co-) catalytic effect of single atoms vs nanoparticles is still highly challenging. Here, we present a novel ultrasound-driven strategy for stabilizing Pt single-atomic sites over highly ordered TiO2 nanotubes. This controllable low-temperature defect engineering enables entrapment of platinum single atoms and controlling their content through the reaction time of consequent chemical impregnation. The novel methodology enables achieving nearly 50 times higher normalized hydrogen evolution compared to pristine titania nanotubes. Moreover, the developed procedure allows the decoration of titania also with ultrasmall nanoparticles through a longer impregnation time of the substrate in a very dilute hexachloroplatinic acid solution. The comparison shows a 10 times higher normalized hydrogen production of platinum single atoms compared to nanoparticles. The mechanistic study shows that the novel approach creates homogeneously distributed defects, such as oxygen vacancies and Ti3+ species, which effectively trap and stabilize Pt2+ and Pt4+ single atoms. The optimized platinum single-atom photocatalyst shows excellent performance of photocatalytic water splitting and hydrogen evolution under one sun solar-simulated light, with TOF values being one order of magnitude higher compared to those of traditional thermal reduction-based methods. The single-atom engineering based on the creation of ultrasound-triggered chemical traps provides a pathway for controllable assembling stable and highly active single-atomic site catalysts on metal oxide support layers.
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Affiliation(s)
- Mahdi Shahrezaei
- Czech
Advanced Technology and Research Institute, Regional Centre of Advanced
Technologies and Materials, Palacký
University Olomouc, Slechtitelu 27, 77900 Olomouc, Czech Republic
- Department
of Physical Chemistry, Faculty of Science, Palacky University, 17. listopadu 1192/12, 77900 Olomouc, Czech Republic
| | - S. M. Hossein Hejazi
- Czech
Advanced Technology and Research Institute, Regional Centre of Advanced
Technologies and Materials, Palacký
University Olomouc, Slechtitelu 27, 77900 Olomouc, Czech Republic
- CEET,
Nanotechnology Centre, VŠB−Technical
University of Ostrava, 17. listopadu 2172/15, 70800 Ostrava-Poruba, Czech Republic
| | - Hana Kmentova
- Czech
Advanced Technology and Research Institute, Regional Centre of Advanced
Technologies and Materials, Palacký
University Olomouc, Slechtitelu 27, 77900 Olomouc, Czech Republic
| | - Veronika Sedajova
- Czech
Advanced Technology and Research Institute, Regional Centre of Advanced
Technologies and Materials, Palacký
University Olomouc, Slechtitelu 27, 77900 Olomouc, Czech Republic
| | - Radek Zboril
- Czech
Advanced Technology and Research Institute, Regional Centre of Advanced
Technologies and Materials, Palacký
University Olomouc, Slechtitelu 27, 77900 Olomouc, Czech Republic
- CEET,
Nanotechnology Centre, VŠB−Technical
University of Ostrava, 17. listopadu 2172/15, 70800 Ostrava-Poruba, Czech Republic
| | - Alberto Naldoni
- Department
of Chemistry and NIS Centre, University
of Turin, Turin 10125, Italy
| | - Stepan Kment
- Czech
Advanced Technology and Research Institute, Regional Centre of Advanced
Technologies and Materials, Palacký
University Olomouc, Slechtitelu 27, 77900 Olomouc, Czech Republic
- CEET,
Nanotechnology Centre, VŠB−Technical
University of Ostrava, 17. listopadu 2172/15, 70800 Ostrava-Poruba, Czech Republic
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3
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Alharthi FA, El Marghany A, Abduh NAY, Hasan I. Efficient light-driven hydrogen evolution and azo dye degradation over the GdVO 4@g-C 3N 4 heterostructure. RSC Adv 2023; 13:20417-20429. [PMID: 37426706 PMCID: PMC10326889 DOI: 10.1039/d3ra02949b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Accepted: 06/14/2023] [Indexed: 07/11/2023] Open
Abstract
A straightforward hydrothermal technique was used for the synthesis of a g-C3N4/GdVO4 (CN/GdV) heterostructure as an alternate material for energy and environmental applications. X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS) were used to characterize the synthesized g-C3N4 (CN), GdVO4 (GdV), and the CN/GdV heterostructure. The characterization results revealed the distribution of GdV over CN sheets. The as-fabricated materials were tested for their capacity to evolve hydrogen gas and degrade two azo dyes (Amaranth; AMR and Reactive Red2; RR2) in the presence of visible light. When compared to pure CN and GdV, the efficiency of CN/GdV toward hydrogen evolution was high, with H2 evolution of 8234, 10 838, and 16 234 μmol g-1 in 4 h, respectively. The CN/GdV heterostructure was able to degrade 96% and 93% of AMR (60 min) and RR2 (80 min), respectively. The enhanced activity with CN/GdV could be attributed to the type-II heterostructure and decreased recombination of charge carriers. The intermediate analysis of AMR and RR2 degradation was conducted using mass spectrometry (MS). The mechanism of photocatalysis was investigated and is discussed based on the optical and electrochemical characterizations. The efficient photocatalytic characteristics of CN/GdV could promote further research on metal vanadate nanocomposite materials.
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Affiliation(s)
- Fahad A Alharthi
- Department of Chemistry, College of Science, King Saud University Riyadh-11451 Saudi Arabia +966-507976713
| | - Adel El Marghany
- Department of Chemistry, College of Science, King Saud University Riyadh-11451 Saudi Arabia +966-507976713
| | - Naaser A Y Abduh
- Department of Chemistry, College of Science, King Saud University Riyadh-11451 Saudi Arabia +966-507976713
| | - Imran Hasan
- Department of Chemistry, College of Science, King Saud University Riyadh-11451 Saudi Arabia +966-507976713
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Shi H, Feng D, Li H, Yu D, Chen X. Hydrophilic hydrogen-bonded organic frameworks/g-C3N4 all-organic Z-scheme heterojunction for efficient visible-light photocatalytic hydrogen production and dye degradation. J Photochem Photobiol A Chem 2023. [DOI: 10.1016/j.jphotochem.2022.114292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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5
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TiO2 nanoarrays modification by a novel Cobalt-heteroatom doped graphene complex for photoelectrochemical water splitting: An experimental and theoretical study. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.118960] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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6
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Zhao C, Jing T, Dong M, Pan D, Guo J, Tian J, Wu M, Naik N, Huang M, Guo Z. A Visible Light Driven Photoelectrochemical Chloramphenicol Aptasensor Based on a Gold Nanoparticle-Functionalized 3D Flower-like MoS 2/TiO 2 Heterostructure. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:2276-2286. [PMID: 35138855 DOI: 10.1021/acs.langmuir.1c02956] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Developing a photoactive material by combining the characteristics of a wide light response range and effective separation of photogenerated electron-hole pairs remains a huge challenge for the construction of a photoelectrochemical (PEC) sensing platform. Herein, a gold nanoparticle (AuNP)/MoS2/TiO2 composite was prepared through the facile hydrothermal method coupled with an in situ photoreduction technology. Benefiting from both the compositional and structure merits, the composite not only extends the absorption range to visible light but also enhances the photoelectric conversion efficiency by transferring photogenerated electrons into the conduction band of semiconductors from the plasmonic AuNP. Meanwhile, the thiolated aptamers were attached to the surface of AuNP/MoS2/TiO2 composites through the Au-S bonding to construct a visible light driven PEC aptasensor for ultrasensitive detection chloramphenicol (CAP). In the presence of CAP, the aptamers anchored on the surface of the photoactive materials could specifically recognize CAP and interact with it to form a bioaffinity complex with a steric hindrance effect, resulting in the rapid decrease of photocurrent responses. Based on this photocurrent suppression strategy, the constructed PEC aptasensing platform exhibited a high sensitivity with a wide linear range from 5 pM to 100 nM and a low detection limit of 0.5 pM.
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Affiliation(s)
- Chunqi Zhao
- College of Chemistry and Chemical Engineering, Qiqihar University, No. 42 Wenhua Street, Jianhua District, Qiqihar 161006, China
| | - Tao Jing
- College of Chemistry and Chemical Engineering, Qiqihar University, No. 42 Wenhua Street, Jianhua District, Qiqihar 161006, China
| | - Mengyao Dong
- Key Laboratory of Material Processing and Mold Technology, School of Mechanical Engineering and Automation, Chongqing Industry Polytechnic College, Chongqing 401120, China
| | - Duo Pan
- Key Laboratory of Materials Processing and Mold (Zhengzhou University), Zhengzhou University, Zhengzhou 450001, China
| | - Jiang Guo
- Advanced Materials Division, Engineered Multifunctional Composites (EMC) Nanotech. LLC, Knoxville, Tennessee 37934, United States
- School of Materials Science and Engineering, Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials, Shaanxi University of Science & Technology, Xi'an 710021, China
| | - Jingzhi Tian
- College of Chemistry and Chemical Engineering, Qiqihar University, No. 42 Wenhua Street, Jianhua District, Qiqihar 161006, China
| | - Min Wu
- College of Chemistry and Chemical Engineering, Qiqihar University, No. 42 Wenhua Street, Jianhua District, Qiqihar 161006, China
| | - Nithesh Naik
- Department of Mechanical & Manufacturing Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal 576104, Karnataka, India
| | - Mina Huang
- Advanced Materials Division, Engineered Multifunctional Composites (EMC) Nanotech. LLC, Knoxville, Tennessee 37934, United States
- Integrated Composites Laboratory (ICL), Department of Chemical and Bimolecular Engineering, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Zhanhu Guo
- Integrated Composites Laboratory (ICL), Department of Chemical and Bimolecular Engineering, University of Tennessee, Knoxville, Tennessee 37996, United States
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7
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Juay J, Yang JCE, Bai H, Sun DD. Novel ultralong and photoactive Bi 2Ti 4O 11/TiO 2 heterojunction nanofibers toward efficient textile wastewater treatment. RSC Adv 2022; 12:25449-25456. [PMID: 36199309 PMCID: PMC9450850 DOI: 10.1039/d2ra02181a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Accepted: 08/23/2022] [Indexed: 02/05/2023] Open
Abstract
The elimination of dyes from textile wastewater with a lower carbon footprint is highly contingent on the design of green catalysts. Here, we innovatively developed ultralong one-dimensional Bi2Ti4O11/TiO2 heterojunction nanofibers via electrospinning so as to photocatalytically degrade dyes efficiently and sustainably through the utilisation of renewable solar irradiation. The heterostructured Bi2Ti4O11/TiO2 nanofibers exhibited desirable activity in the visible light region through the slight shift of the absorption edge to a longer wavelength. The Bi2Ti4O11/TiO2 nanofibers calcined at 550 °C had a lower optical band gap (3.08 eV) than that of the pure TiO2 (3.32 eV), as evidenced by their higher photocatalytic degradation kinetics of a model dye (Acid Orange 7) (2.5 times greater than those of pure TiO2). The enhanced visible light photocatalytic performance arose from the formation of both the Bi2Ti4O11/TiO2 heterojunction and the effective separation of photogenerated holes and electrons. The employment of ultralong Bi2Ti4O11/TiO2 heterojunction nanofibers for dye removal/decolourisation under visible light is an efficient, cost effective and sustainable solution, which will provide significant insights for practical textile wastewater treatment in view of practical engineering applications. The elimination of dyes from textile wastewater with a lower carbon footprint is highly contingent on the design of green catalysts.![]()
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Affiliation(s)
- Jermyn Juay
- School of Civil and Environmental Engineering, Nanyang Technological University, Singapore 639798, Singapore
| | - Jia-Cheng E. Yang
- CAS Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
| | - Hongwei Bai
- School of Civil and Environmental Engineering, Nanyang Technological University, Singapore 639798, Singapore
| | - Darren Delai Sun
- School of Civil and Environmental Engineering, Nanyang Technological University, Singapore 639798, Singapore
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8
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Li H, Huang Y, Liu J, Duan H. Hydrothermally synthesized titanate nanomaterials for the removal of heavy metals and radionuclides from water: A review. CHEMOSPHERE 2021; 282:131046. [PMID: 34102493 DOI: 10.1016/j.chemosphere.2021.131046] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Revised: 05/26/2021] [Accepted: 05/27/2021] [Indexed: 06/12/2023]
Abstract
Hazardous heavy metals and radionuclides in water and wastewater are of drastic concern owing to their detrimental impacts on the organisms as well as the circumambient ecosystem. To remove them as much as we can, both technique and materials were studied in the past years. The adsorption technique as superior water remediation method with the simplicity of design, environmental friendliness and high efficiency was well established. Consequently, it is practically important to explore advanced and economically feasible absorbents for removing these poisonous pollutants from aqueous solutions. So far, large numbers of experiments proved hydrothermally synthesized titanate nanomaterials (TNMs) could be a prospectively excellent adsorbent extracting heavy metals and radionuclides from water due to the high specific surface area, tunable pore size, abundant surface active sites, favorable hydrophilic properties. The objective of this work is to give an overview of hydrothermal synthesis, adsorption performance of TNMs for heavy metals and radionuclides, as well as the various influencing factors for water purification. It comprehensively reviews the structural changes and regenerability of TNMs after adsorption, and different modification methods adopted for improving removal capacity. Additionally, it uniquely highlights the efficient decontamination of the pollutants through a synergistic effect of adsorption and photocatalysis by TNMs. This review provides detailed information for the development, application, and research challenges faced by hydrothermally synthesized TNMs for the removal of heavy metals and radionuclides from aqueous solutions, which will serve as a reference guide for scientists in related fields.
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Affiliation(s)
- Hanyu Li
- College of Ecology and Environment, Chengdu University of Technology, Sichuan, 610059, China
| | - Yi Huang
- College of Ecology and Environment, Chengdu University of Technology, Sichuan, 610059, China; State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, College of Geosciences, Chengdu University of Technology, China.
| | - Jianing Liu
- College of Ecology and Environment, Chengdu University of Technology, Sichuan, 610059, China
| | - Haoran Duan
- College of Ecology and Environment, Chengdu University of Technology, Sichuan, 610059, China
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9
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Liu Y, Lee CC, Horn MW, Lee H. Toward efficient photocatalysts for light-driven CO2 reduction: TiO2 nanostructures decorated with perovskite quantum dots. NANO EXPRESS 2021. [DOI: 10.1088/2632-959x/abf3d2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Abstract
Nanostructured TiO2 is often used for photocatalytic CO2 conversion due to its favorable electronic properties and stability, being coupled with large surface area and unique electrical properties. However, pure TiO2, without any expensive cocatalysts, can not provide highly efficient CO2 conversion because its bandgap and resulted limited numbers of photogenerated electrons and holes limit efficient energy conversion. Here, we demonstrate TiO2 nanotube (TNT) photocatalysts equipped with two different perovskite quantum dots (PQDs) made of CH3NH3PbBr3 and CH3NH3PbI3. The fundamental properties of the PQDs and TNT/PQD photocatalysts are investigated and their potential for more efficient CO2 conversion are discussed, to our best knowledge, for the first time. TNT/CH3NH3PbI3 QD photocatalysts absorb a wider range of light energy and show superior charge transport characteristics due to less sensitivity against surface states at TNT/CH3NH3PbI3 QD interface than the TNT/CH3NH3PbBr3 photocatalysts.
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10
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Liu C, Zhang C, Yin G, Zhang T, Wang W, Ou G, Jin H, Chen Z. A Three-Dimensional Branched TiO 2 Photoanode with an Ultrathin Al 2O 3 Passivation Layer and a NiOOH Cocatalyst toward Photoelectrochemical Water Oxidation. ACS APPLIED MATERIALS & INTERFACES 2021; 13:13301-13310. [PMID: 33723983 DOI: 10.1021/acsami.1c00948] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Photoelectrochemical (PEC) water splitting provides an alternative strategy for clean and renewable hydrogen production; however, the practical application is severely limited by the low solar conversion. Herein, a novel and simple strategy has been developed to construct a 3D branched TiO2 photoanode with an ultrathin Al2O3 passivation layer and NiOOH cocatalyst. The structure and properties of the as-obtained photoanodes are explored by X-ray diffraction, Mott-Schottky, electrochemical impedance spectroscopy, and open circuit voltage measurements. The as-obtained B-TiO2/Al2O3/NiOOH ternary heterojunction with a high-quality contact interface exhibits improved light absorption ability, an enhanced photocurrent density of 1.42 mA/cm2 at 1.23 VRHE, high conversion efficiency (0.44% at 0.80 VRHE), and excellent stability compared to pristine TiO2 and alone-Al2O3 or NiOOH decorated TiO2 photoanodes. Therefore, this work could offer a new approach to designing and fabricating high-quality contact interfaces between photoelectrodes and various cocatalysts.
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Affiliation(s)
- Changhai Liu
- School of Materials Science and Engineering, Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Changzhou University, Changzhou, Jiangsu 213164, China
| | - Chao Zhang
- School of Materials Science and Engineering, Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Changzhou University, Changzhou, Jiangsu 213164, China
| | - Ge Yin
- School of Materials Science and Engineering, Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Changzhou University, Changzhou, Jiangsu 213164, China
| | - Tingting Zhang
- School of Materials Science and Engineering, Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Changzhou University, Changzhou, Jiangsu 213164, China
| | - Wenchang Wang
- School of Petrochemical Engineering, Changzhou University, Changzhou, Jiangsu 213164, China
| | - Guofu Ou
- Institute of Flow-Induced Corrosion and Intelligent Prevention, Changzhou University, Changzhou 213164, China
| | - Haozhe Jin
- The Flow Induced Corrosion Institution, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Zhidong Chen
- School of Petrochemical Engineering, Changzhou University, Changzhou, Jiangsu 213164, China
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11
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Chen YA, Wang YT, Moon HS, Yong K, Hsu YJ. Yolk-shell nanostructures: synthesis, photocatalysis and interfacial charge dynamics. RSC Adv 2021; 11:12288-12305. [PMID: 35423745 PMCID: PMC8696994 DOI: 10.1039/d1ra00803j] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2021] [Accepted: 03/16/2021] [Indexed: 12/18/2022] Open
Abstract
Solar energy has long been regarded as a promising alternative and sustainable energy source. In this regard, photocatalysts emerge as a versatile paradigm that can practically transform solar energy into chemical energy. At present, unsatisfactory conversion efficiency is a major obstacle to the widespread deployment of photocatalysis technology. Many structural engineering strategies have been proposed to address the issue of insufficient activity for semiconductor photocatalysts. Among them, creation of yolk-shell nanostructures which possess many beneficial features, such as large surface area, efficient light harvesting, homogeneous catalytic environment and enhanced molecular diffusion kinetics, has attracted particular attention. This review summarizes the developments that have been made for the preparation and photocatalytic applications of yolk-shell nanostructures. Additional focus is placed on the realization of interfacial charge dynamics and the possibility of achieving spatial separation of charge carriers for this unique nanoarchitecture as charge transfer is the most critical factor determining the overall photocatalytic efficiency. A future perspective that can facilitate the advancement of using yolk-shell nanostructures in sophisticated photocatalytic systems is also presented.
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Affiliation(s)
- Yi-An Chen
- Department of Materials Science and Engineering, National Chiao Tung University Hsinchu 30010 Taiwan
| | - Yu-Ting Wang
- Department of Materials Science and Engineering, National Chiao Tung University Hsinchu 30010 Taiwan
| | - Hyun Sik Moon
- Surface Chemistry Laboratory of Electronic Materials, Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH) Pohang 790-784 Korea
| | - Kijung Yong
- Surface Chemistry Laboratory of Electronic Materials, Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH) Pohang 790-784 Korea
| | - Yung-Jung Hsu
- Department of Materials Science and Engineering, National Chiao Tung University Hsinchu 30010 Taiwan
- Center for Emergent Functional Matter Science, National Chiao Tung University Hsinchu 30010 Taiwan
- Department of Materials Science and Engineering, National Yang Ming Chiao Tung University Hsinchu 30010 Taiwan
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12
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Li L, Yin D, Xiandi G. Construction of a novel 2D–2D heterojunction by coupling a covalent organic framework and In 2S 3 for photocatalytic removal of organic pollutants with high efficiency. NEW J CHEM 2021. [DOI: 10.1039/d1nj03133c] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
TpPa-1 COF was coupled with an inorganic narrow-band gap semiconductor In2S3 to form a novel 2D–2D heterojunction by a facile hydrothermal method.
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Affiliation(s)
- Luqiu Li
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, China
| | - Dongguang Yin
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, China
| | - Guo Xiandi
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, China
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13
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Jiang Q, Wang S, Li X, Han Z, Zhao C, Di T, Liu S, Cheng Z. Controllable growth of MoS 2 nanosheets on TiO 2 burst nanotubes and their photocatalytic activity. RSC Adv 2020; 10:40904-40915. [PMID: 35519211 PMCID: PMC9057720 DOI: 10.1039/d0ra08421b] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2020] [Accepted: 11/03/2020] [Indexed: 01/02/2023] Open
Abstract
MoS2 nanosheets were grown on TiO2 nanotubes by the simple hydrothermal method for the first time. The layer-by-layer growth of MoS2 nanosheets led to a significant increase in the specific surface area of TiO2/MoS2 burst tube composites compared with TiO2 burst tubes, a significantly enhanced ability to separate photo-induced carriers, and synergistic adsorption and visible light catalytic activity of dye molecules. The maximum adsorption (q max) of MB was 72.46 mg g-1. In addition, 94.1% of MB could be degraded after 30 minutes of visible light irradiation. The microsurface morphology, structure, chemical composition, element valence and band width of TiO2/MoS2 nanocomposites were analyzed by scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDS), X-ray photoelectron spectroscopy (XRD), X-ray photoelectron spectroscopy (XPS), diffuse reflectance spectroscopy (DRS) and photoluminescence spectroscopy (PL). The mechanism of photocatalytic reaction was studied via free radical capture experiments.
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Affiliation(s)
- Qiushi Jiang
- College of Resources and Environment, Jilin Agricultural University Changchun 130118 People's Republic of China
| | - Shang Wang
- College of Resources and Environment, Jilin Agricultural University Changchun 130118 People's Republic of China
| | - Xue Li
- College of Information Technology, Jilin Agricultural University Changchun 130118 People's Republic of China
| | - Zhaolian Han
- College of Resources and Environment, Jilin Agricultural University Changchun 130118 People's Republic of China
| | - Chunli Zhao
- College of Horticulture, Jilin Agricultural University Changchun 130118 People's Republic of China
| | - Tingting Di
- Northeast Electric Power Design Institue Co.,LTD. of China Power Engineering Consulting Group Changchun 130021 People's Republic of China
| | - Siyuan Liu
- College of Resources and Environment, Jilin Agricultural University Changchun 130118 People's Republic of China
| | - Zhiqiang Cheng
- College of Resources and Environment, Jilin Agricultural University Changchun 130118 People's Republic of China
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14
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Strategic Surface Modification for the Enhanced Photocatalyic Activity: Synergistic Promotion for Energy Utilization in TiO2–Cu2O–Au. Catal Letters 2020. [DOI: 10.1007/s10562-020-03431-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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15
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Pt Deposites on TiO2 for Photocatalytic H2 Evolution: Pt Is Not Only the Cocatalyst, but Also the Defect Repair Agent. Catalysts 2020. [DOI: 10.3390/catal10091047] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Pt, as a common cocatalyst, has been widely used in photocatalytic H2 evolution. However, the specific role of Pt in photocatalytic H2 evolution has not been thoroughly studied. In this paper, by employing three Pt sources with different charges (positive, negative and neutral), we systematically studied the charge effect of Pt sources on photocatalytic H2 evolution via TiO2 catalyst. According to the results of Raman, X-ray photoelectron spectroscopy (XPS), recycle experiments and photocurrent characterizations, it was found that TiO2 would produce electropositive defects during photocatalytic H2 evolution, inevitably leading to the decline of H2 production activity. Thanks to the electrostatic interaction, the electronegative Pt source not only promoted charge separation, but preferential deposited on electropositive defects, which acted as the defect repair agent, and thus resulted in the increased photocatalytic stability. This work may provide a new perspective for enhancing photocatalytic stability of hydrogen production.
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16
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Dong Y, Meng F. Effect of triblock copolymers on crystal growth and the photocatalytic activity of anatase TiO 2 single crystals. RSC Adv 2020; 10:32400-32408. [PMID: 35547097 PMCID: PMC9088207 DOI: 10.1039/d0ra05965j] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Accepted: 08/20/2020] [Indexed: 11/21/2022] Open
Abstract
In order to evaluate the effect of a triblock copolymer on the growth of TiO2 crystals, anatase TiO2 crystals with different morphologies and structures were synthesized by controlling the content and type of triblock copolymer in the solvothermal route. The resulting samples were characterized by XRD, XPS, SEM, TEM and EDX. The characterization results show that hydrofluoric acid can promote the formation of highly active (001) facets by the formation of a Ti–F bond. The triblock copolymers (P123 and F127) refine the surface structure of polycrystalline spherical TiO2 and make the crystal surface homogeneous and smooth. Moreover, P123 causes the agglomeration effect and hinders the recrystallization process of anatase TiO2 single crystals, and this will lead to corrosion of the crystal facets. Meanwhile, F127 destroys crystal formation and hinders crystal growth due to its special micelle structure. In addition, research on the photocatalytic activity proposed that the integrity of the (001) and (101) facets was a critical factor in the photocatalytic reaction. The resultant anatase TiO2 single crystals could produce more hydroxyl radicals (˙OH) in the photocatalytic system, which exhibited remarkable photocatalytic performance for the degradation of three types of dye. The effects of triblock copolymers (P123 and F127) on the growth of TiO2 crystals were studied. Anatase TiO2 crystals with different morphologies and structures were synthesized by controlling the content and type of triblock copolymer in a solvothermal method.![]()
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Affiliation(s)
- Yeshuo Dong
- School of Environmental and Municipal Engineering, Qingdao University of Technology Qingdao 266033 China
| | - Fanjun Meng
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University Jinan 250014 China
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17
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Ma Y, Yang X, Gao G, Yan Z, Su H, Zhang B, Lei Y, Zhang Y. Photocatalytic partial oxidation of methanol to methyl formate under visible light irradiation on Bi-doped TiO 2 via tuning band structure and surface hydroxyls. RSC Adv 2020; 10:31442-31452. [PMID: 35520665 PMCID: PMC9056498 DOI: 10.1039/d0ra06309f] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Accepted: 08/20/2020] [Indexed: 12/21/2022] Open
Abstract
Preparing visible light responsive catalysts for partial oxidation of methanol to methyl formate is a challenging issue. This work addresses the synthesis, characterization and theoretical calculation of Bi doped TiO2 catalysts as well as their photocatalytic performance and reaction mechanism for MF synthesis from methanol. The catalysts were prepared by a simple wet chemical method. The results of the characterization and theoretical calculation evidenced that bismuth was intercalated in the lattice of anatase by the substitution of titanium. Impurity levels were formed in the valence band, conduction band and between the two bands. The Bi 6s and 5p orbitals contributed to the formation of the impurity levels. The photo-excited electrons transited from the valence band via impurity levels, formed by Bi 6s orbitals, to the conduction band. The doping of Bi enhanced surface hydroxyls, reduced the band gaps and raised the valence band edges (VBE) of the Bi doped catalyst. The Bi doped catalysts were visible light responsive due to the reduced band gap. The surface hydroxyls were beneficial to the methanol conversion, and the rise of the VBE enhanced the redox potential of the photogenerated holes. Only moderate redox potentials and sufficient surface hydroxyls could lead to high methanol conversion and MF selectivity. This study is of great significance to the development of the photocatalytic synthesis theory and provides a green route for MF synthesis from methanol. Bi-doped titania is well studied for photocatalytic partial oxidation of methanol to methyl formate under visible light irradiation.![]()
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Affiliation(s)
- Yue Ma
- School of Chemistry and Chemical Engineering, Inner Mongolia Key Lab of Rare Earth Materials Chemistry and Physics, Inner Mongolia University Hohhot Inner Mongolia 010021 P. R. China
| | - Xuzhuang Yang
- School of Chemistry and Chemical Engineering, Inner Mongolia Key Lab of Rare Earth Materials Chemistry and Physics, Inner Mongolia University Hohhot Inner Mongolia 010021 P. R. China
| | - Guanjun Gao
- School of Chemistry and Chemical Engineering, Inner Mongolia Key Lab of Rare Earth Materials Chemistry and Physics, Inner Mongolia University Hohhot Inner Mongolia 010021 P. R. China
| | - Zhe Yan
- School of Chemistry and Chemical Engineering, Inner Mongolia Key Lab of Rare Earth Materials Chemistry and Physics, Inner Mongolia University Hohhot Inner Mongolia 010021 P. R. China
| | - Haiquan Su
- School of Chemistry and Chemical Engineering, Inner Mongolia Key Lab of Rare Earth Materials Chemistry and Physics, Inner Mongolia University Hohhot Inner Mongolia 010021 P. R. China
| | - Bingbing Zhang
- School of Chemistry and Chemical Engineering, Inner Mongolia Key Lab of Rare Earth Materials Chemistry and Physics, Inner Mongolia University Hohhot Inner Mongolia 010021 P. R. China
| | - Yanqiu Lei
- School of Chemistry and Chemical Engineering, Inner Mongolia Key Lab of Rare Earth Materials Chemistry and Physics, Inner Mongolia University Hohhot Inner Mongolia 010021 P. R. China
| | - Yanbing Zhang
- School of Chemistry and Chemical Engineering, Inner Mongolia Key Lab of Rare Earth Materials Chemistry and Physics, Inner Mongolia University Hohhot Inner Mongolia 010021 P. R. China
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18
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Ombaka LM, Curti M, McGettrick JD, Davies ML, Bahnemann DW. Nitrogen/Carbon-Coated Zero-Valent Copper as Highly Efficient Co-catalysts for TiO 2 Applied in Photocatalytic and Photoelectrocatalytic Hydrogen Production. ACS APPLIED MATERIALS & INTERFACES 2020; 12:30365-30380. [PMID: 32525294 DOI: 10.1021/acsami.0c06880] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Zero-valent copper (Cu0) is a promising co-catalyst in semiconductor-based photocatalysis as it is inexpensive and exhibits electronic properties similar to those of Ag and Au. However, its practical application in photocatalytic hydrogen production is limited by its susceptibility to oxidation, forming less active Cu species. Herein, we have carried out in situ encapsulation of Cu0 nanoparticles with N-graphitic carbon layers (14.4% N) to stabilize Cu0 nanoparticles (N/C-coated Cu) and improve the electronic communication with a TiO2 photocatalyst. A facile solvothermal procedure is used to coat the Cu0 nanoparticles at 200 °C, while graphitization is achieved by calcination at 550 °C under an inert atmosphere. The resultant N/C-coated Cu/TiO2 composites outperform the uncoated Cu counterparts, exhibiting a 27-fold enhancement of the hydrogen evolution rate compared to TiO2 and achieving a rate of 19.03 mmol g-1 h-1 under UV-vis irradiation. Likewise, the N/C-coated Cu co-catalyst exhibits a less negative onset potential of -0.05 V toward hydrogen evolution compared to uncoated Cu (ca. -0.30 V). This superior activity is attributed to coating Cu0 with N/C, which enhances the stability, electronic communication with TiO2, conductivity, and interfacial charge transfer processes. The reported synthetic approach is simple and scalable, yielding an efficient and affordable Cu0 co-catalyst for TiO2.
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Affiliation(s)
- Lucy M Ombaka
- Institut für Technische Chemie, Gottfried Wilhelm Leibniz Universität Hannover, Callinstrasse 3, Hannover 30167, Germany
- School of Chemistry and Material Science, Technical University of Kenya, P.O. Box 52428-00200, Nairobi, Kenya
| | - Mariano Curti
- Institut für Technische Chemie, Gottfried Wilhelm Leibniz Universität Hannover, Callinstrasse 3, Hannover 30167, Germany
| | - James D McGettrick
- SPECIFIC IKC, Materials Research Centre, College of Engineering, Swansea University, Bay Campus, Fabian Way, Swansea SA1 8EN, U.K
| | - Matthew L Davies
- SPECIFIC IKC, Materials Research Centre, College of Engineering, Swansea University, Bay Campus, Fabian Way, Swansea SA1 8EN, U.K
- School of Chemistry and Physics, University of KwaZulu-Natal, Westville Campus, Private Bag X54001, Durban 4000, South Africa
| | - Detlef W Bahnemann
- Institut für Technische Chemie, Gottfried Wilhelm Leibniz Universität Hannover, Callinstrasse 3, Hannover 30167, Germany
- Laboratorium für Nano- und Quantenengineering, Gottfried Wilhelm Leibniz Universität Hannover, Schneiderberg 39, Hannover 30167, Germany
- Laboratory for Photoactive Nanocomposite Materials, Department of Photonics, Faculty of Physics, Saint-Petersburg State University, Ulianovskaia Str. 3, Peterhof, Saint-Petersburg 198504, Russia
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19
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Wang S, He T, Chen P, Du A, Ostrikov KK, Huang W, Wang L. In Situ Formation of Oxygen Vacancies Achieving Near-Complete Charge Separation in Planar BiVO 4 Photoanodes. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e2001385. [PMID: 32406092 DOI: 10.1002/adma.202001385] [Citation(s) in RCA: 106] [Impact Index Per Article: 26.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Revised: 04/08/2020] [Accepted: 04/15/2020] [Indexed: 06/11/2023]
Abstract
Despite a suitable bandgap of bismuth vanadate (BiVO4 ) for visible light absorption, most of the photogenerated holes in BiVO4 photoanodes are vanished before reaching the surfaces for oxygen evolution reaction due to the poor charge separation efficiency in the bulk. Herein, a new sulfur oxidation strategy is developed to prepare planar BiVO4 photoanodes with in situ formed oxygen vacancies, which increases the majority charge carrier density and photovoltage, leading to a record charge separation efficiency of 98.2% among the reported BiVO4 photoanodes. Upon loading NiFeOx as an oxygen evolution cocatalyst, a stable photocurrent density of 5.54 mA cm-2 is achieved at 1.23 V versus the reversible hydrogen electrode (RHE) under AM 1.5 G illumination. Remarkably, a dual-photoanode configuration further enhances the photocurrent density up to 6.24 mA cm-2 , achieving an excellent applied bias photon-to-current efficiency of 2.76%. This work demonstrates a simple thermal treatment approach to generate oxygen vacancies for the design of efficient planar photoanodes for solar hydrogen production.
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Affiliation(s)
- Songcan Wang
- Frontiers Science Center for Flexible Electronics (FSCFE), Shaanxi Institute of Flexible Electronics (SIFE) & Shaanxi Institute of Biomedical Materials and Engineering (SIBME), Northwestern Polytechnical University (NPU), 127 West Youyi Road, Xi'an, 710072, China
- Nanomaterials Centre, School of Chemical Engineering and Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD, 4072, Australia
| | - Tianwei He
- School of Chemistry and Physics and Centre for Materials Science, Queensland University of Technology, Brisbane, QLD, 4000, Australia
| | - Peng Chen
- Nanomaterials Centre, School of Chemical Engineering and Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD, 4072, Australia
| | - Aijun Du
- School of Chemistry and Physics and Centre for Materials Science, Queensland University of Technology, Brisbane, QLD, 4000, Australia
| | - Kostya Ken Ostrikov
- School of Chemistry and Physics and Centre for Materials Science, Queensland University of Technology, Brisbane, QLD, 4000, Australia
| | - Wei Huang
- Frontiers Science Center for Flexible Electronics (FSCFE), Shaanxi Institute of Flexible Electronics (SIFE) & Shaanxi Institute of Biomedical Materials and Engineering (SIBME), Northwestern Polytechnical University (NPU), 127 West Youyi Road, Xi'an, 710072, China
| | - Lianzhou Wang
- Nanomaterials Centre, School of Chemical Engineering and Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD, 4072, Australia
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20
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21
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Ashraf W, Bansal S, Singh V, Barman S, Khanuja M. BiOCl/WS 2 hybrid nanosheet (2D/2D) heterojunctions for visible-light-driven photocatalytic degradation of organic/inorganic water pollutants. RSC Adv 2020; 10:25073-25088. [PMID: 35517440 PMCID: PMC9055180 DOI: 10.1039/d0ra02916e] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Accepted: 06/15/2020] [Indexed: 01/25/2023] Open
Abstract
This report presents the superior visible-light-driven photocatalytic response of novel 2D/2D BiOCl/WS2 (BW X ) hybrid nanosheet heterojunctions prepared by a simple solution based sonochemical technique. These BW X hybrid nanosheets are composed of 2D transition metal dichalcogenide material WS2 and BiOCl nanosheets. The comparative study of photocatalytic activity of BiOCl and BiOCl/WS2 hybrid nanosheets is carried out via photodegradation of Malachite Green (MG) and photoreduction of heavy metal ion Cr(vi) under visible light irradiation. The quantum efficiency of the samples is estimated in terms of the incident photon to electron conversion efficiency (IPCE) measurements. Nearly 98.4% of the MG degradation was achieved over BiOCl/WS2 (2%) photocatalyst in 45 min of irradiation. BiOCl/WS2 (2%) hybrid nanosheet catalyst showed the highest external quantum efficiency (EQE) in both the UV and visible regimes. This accomplishment demonstrated the promise of commercial application of the 2D/2D BiOCl/WS2 (2%) hybrid nanosheet photocatalyst.
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Affiliation(s)
- Waseem Ashraf
- Centre for Nanoscience and Nanotechnology, Jamia Millia Islamia New Delhi-110025 India
| | - Shikha Bansal
- Centre for Nanoscience and Nanotechnology, Jamia Millia Islamia New Delhi-110025 India
| | - Vikrant Singh
- Center for Advanced Materials and Devices, BML Munjal University Haryana-122413 India
| | - Sanmitra Barman
- Center for Advanced Materials and Devices, BML Munjal University Haryana-122413 India
| | - Manika Khanuja
- Centre for Nanoscience and Nanotechnology, Jamia Millia Islamia New Delhi-110025 India
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22
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Zhang W, Qian J, Lei Y, Zhang C, Ma J. Simple synthesis of hierarchically porous Sn/TiO 2/graphitic carbon microspheres for CO 2 reduction with H 2O under simulated solar irradiation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:22631-22638. [PMID: 32319059 DOI: 10.1007/s11356-020-08732-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Accepted: 04/02/2020] [Indexed: 06/11/2023]
Abstract
A simple colloidal crystal template method was used to prepare Sn/TiO2/graphite carbon microsphere composites (xSn/TiO2/GCM, x = 2.0, 1.0, 0.2, 0.5) with porous layers. Then, the composites were represented using X-ray diffraction, energy dispersive spectrometry, scanning electron microscopy, transmission electron microscopy, and nitrogen physical adsorption/desorption. Meanwhile, the photocatalytic activities in CO2 reduction were studied under simulation of visible light exposure. It was confirmed that the Sn/TiO2/GCM composites had layered porosity, graphitized carbon matrix, and high metal compound content, and their morphology was greatly affected by the acetone amount. The outputs of CO and CH4 coming into the photocatalytic CO2 reduction reaction of Sn/TiO2/GCM were 619.46 and 14.46 μmol g-1, respectively. Among the two products, the highest production rate observed in 0.5Sn/TiO2/GCM. Because of these factors, the layered porous Sn/TiO2/GCM composites have good photocatalytic performance under simulated visible light irradiation and have unique composition and structure characteristics, which give broad application prospects in electrode materials, catalysts, and adsorbents. Graphical abstract.
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Affiliation(s)
- Weiping Zhang
- College of Environment and Planning, Henan University, Kaifeng, 475001, China
| | - Jing Qian
- College of Environment and Planning, Henan University, Kaifeng, 475001, China
| | - Yuchen Lei
- College of Environment and Planning, Henan University, Kaifeng, 475001, China
| | - Chengli Zhang
- College of Environment and Planning, Henan University, Kaifeng, 475001, China.
- Key Laboratory of Geospatial Technology for the Middle and Lower Yellow River Regions, Ministry of Education, Henan University, Kaifeng, 475001, China.
- National Demonstration Center for Environmental and Planning, Henan University, Kaifeng, 475001, China.
- Henan Engineering Research Center for Control & Remediation of Soil Heavy Metal Pollution, Kaifeng, 475001, China.
| | - Jianhua Ma
- College of Environment and Planning, Henan University, Kaifeng, 475001, China
- Key Laboratory of Geospatial Technology for the Middle and Lower Yellow River Regions, Ministry of Education, Henan University, Kaifeng, 475001, China
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23
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Zhang T, Lin P, Wei N, Wang D. Enhanced Photoelectrochemical Water-Splitting Property on TiO 2 Nanotubes by Surface Chemical Modification and Wettability Control. ACS APPLIED MATERIALS & INTERFACES 2020; 12:20110-20118. [PMID: 32255600 DOI: 10.1021/acsami.0c03051] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
We report a simple method to control the photoelectrochemical (PEC) water-splitting performance of TiO2 nanotube arrays (NTs) by surface chemical modification. Four types of modifier molecules with different surface energy and functional groups, including amine (-NH2), n-alkane (-CnH2n+1), perfluoroalkyl (-F), and polymer molecule (-polymer), were self-assembled to the surface of TiO2 NTs, which could change the surface chemical composition and wettability from superhydrophilicity to hydrophobicity. Interestingly, different from expected results, photoelectrochemical measurement results show that the n-octadecyltrichlorosilane-modified TiO2 nanotube arrays with a contact angle of about 134° present the highest PEC property with doubled photocurrent density and more negative onset potential. And the total PEC performance order of the monolayers-modified TiO2 NTs is (-CnH2n+1) > (-F) > (-NH2) > (-OH, pristine TiO2) > (-polymer), which is due to the molecular monolayers modification being able to suppress the recombination of photogenerated electrons and holes and facilitate water oxidation by regulating the interface electric double layer, whereas a thick polymer layer on the photoelectrode surface would affect the light absorbance and decrease the PEC performance. Further investigation indicates that the surface energy and wettability of the TiO2 photoelectrode adjusted by surface modification also have an important influence on the interface reaction of water oxidation and the adsorption/desorption of newly formed oxygen, which also provides a new method for controlling the surface photocatalytic reactions.
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Affiliation(s)
- Tingting Zhang
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- School of Chemistry and Chemical Engineering, Anhui University of Technology, Maanshan 243032, China
| | - Peng Lin
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- School of Chemistry and Chemical Engineering, Anhui University of Technology, Maanshan 243032, China
| | - Ning Wei
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - Daoai Wang
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China
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24
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Shao Z, Zhang Y, Yang X, Zhong M. Au-Mediated Charge Transfer Process of Ternary Cu 2O/Au/TiO 2-NAs Nanoheterostructures for Improved Photoelectrochemical Performance. ACS OMEGA 2020; 5:7503-7518. [PMID: 32280894 PMCID: PMC7144151 DOI: 10.1021/acsomega.0c00299] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Accepted: 03/18/2020] [Indexed: 05/05/2023]
Abstract
Based on a facile three-step preparation method, Cu2O/Au/TiO2-NAs ternary heterojunction nanocomposites have been successfully synthesized by electrodepositing a Cu2O layer on the surface of Au nanoparticles (NPs) decorated highly ordered TiO2 nanotube arrays (NAs). The structure, surface morphology, chemical composition, and optical and intrinsic defects properties of the as-prepared samples are characterized by transmission and scanning electron microscopy (TEM and SEM), X-ray diffraction (XRD), UV-vis light absorbance spectra, Raman scattering, and X-ray photoelectron spectroscopy (XPS). Simultaneously, the Cu2O/Au/TiO2-NAs ternary nanohybrids exhibited progressively improved photoelectrocatalytic (PEC) performance compared with the dual Cu2O/TiO2-NAs type-II nanoheterojunctions, confirming by the photocurrent density versus testing time curve (amperometric I-t curve), open-circuit potential versus testing time curve (V oc-t curve), and electrochemical impedance spectroscopy (EIS) measurements, which were mainly ascribed to the synergistic effect of reduced interfacial charge transfer resistance and boosted energetic charge carriers generation associated with embedding Au NPs. Furthermore, the self-consistent charge transfer mechanism of Z-scheme and interband transitions mediated with Au NPs for Cu2O/Au/TiO2-NAs triple nanocomposites is proposed, which was evaluated by nanosecond time-resolved transient photoluminescence (NTRT-PL) spectra excited by 266 and 400 nm, respectively. Following this scheme, UV-vis light photocatalytic activities of Cu2O/Au/TiO2-NAs ternary nanohybrids were elaborated toward photodegradation of methyl orange (MO) in aqueous solution, and the photodegradation rate of optimum triple nanocomplex was found to be 90%.
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Affiliation(s)
- Zhufeng Shao
- College of New Energy, Bohai University, Jinzhou, Liaoning, 121000 China
| | - Yufeng Zhang
- College of New Energy, Bohai University, Jinzhou, Liaoning, 121000 China
| | - Xiujuan Yang
- College of New Energy, Bohai University, Jinzhou, Liaoning, 121000 China
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25
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Dong Y, Meng F. Effect of polyethylene glycol on crystal growth and photocatalytic activity of anatase TiO 2 single crystals. RSC Adv 2020; 10:12511-12518. [PMID: 35497631 PMCID: PMC9051215 DOI: 10.1039/d0ra01796e] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Accepted: 03/20/2020] [Indexed: 11/21/2022] Open
Abstract
In order to evaluate the effect of polyethylene glycol (PEG) on the growth of TiO2 crystals, anatase TiO2 crystals with different morphologies and structures were synthesized by controlling the content and type of PEG in a solvothermal system. Then, their morphology and structure were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Characterization results show that hydrofluoric acid can promote the formation of high activity (001) facets. Experiments on the effect of PEG on crystal growth show that the low molecular weight PEG (PEG400) can accelerate crystal differentiation and relieve the agglomeration of crystals in the presence of hydrofluoric acid. Besides, according to the experimental results, we found that PEG400 can reduce the agglomeration size and number of TiO2 polycrystalline particles. Research on the photocatalytic activity proposed that the independence of single crystal and the integrity of (001) facets are the critical factors in advanced oxidation reaction. The resultant anatase TiO2 single crystals could produce more hydroxyl radicals (˙OH) in the photocatalytic system, which exhibited remarkable photocatalytic performance for the degradation of Acid Red B. Anatase TiO2 crystals with different structures were synthesized. Experiments on the effect of polyethylene glycol show that the low molecular weight PEG (PEG400) can accelerate crystal differentiation and relieve the agglomeration of crystals.![]()
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Affiliation(s)
- Yeshuo Dong
- School of Environmental and Municipal Engineering, Qingdao University of Technology Qingdao 266033 China
| | - Fanjun Meng
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University Jinan 250014 China
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26
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Yamada T, Suzuki N, Nakata K, Terashima C, Matsushita N, Okada K, Fujishima A, Katsumata KI. Hydrogen Production System by Light-Induced α-FeOOH Coupled with Photoreduction. Chemistry 2020; 26:2380-2385. [PMID: 31702078 DOI: 10.1002/chem.201903642] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2019] [Revised: 10/24/2019] [Indexed: 11/10/2022]
Abstract
Solar-driven catalysts on semiconductors to produce hydrogen are considered as a means to solve environmental issues. In this study, H2 production coupling with oxygen consumption by noble metal-free α-FeOOH was demonstrated even though the conduction band edge was lower than the reduction potential of H+ to H2 . For activation of α-FeOOH, an electron donor, Hg-Xe irradiation, and low pH (ca. 5) were indispensable factors. The H2 production from H2 O was confirmed by GC-MS using isotope-labeled water (D2 O) and deuterated methanol. The α-FeOOH synthesized by coprecipitation method showed 25 times more active than TiO2 . The photocatalytic activity was stable for over 400 h. Our study suggests that α-FeOOH known as rust can produce H2 by light induction.
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Affiliation(s)
- Tetsuya Yamada
- Department of Materials Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo, 152-8550, Japan
| | - Norihiro Suzuki
- Photocatalysis International Research Center, Research Institute for Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba, 278-8510, Japan
| | - Kazuya Nakata
- Photocatalysis International Research Center, Research Institute for Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba, 278-8510, Japan.,Graduate School of Bio-Applications and Systems Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Nakacho, Koganei, Tokyo, 184-0012, Japan
| | - Chiaki Terashima
- Photocatalysis International Research Center, Research Institute for Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba, 278-8510, Japan
| | - Nobuhiro Matsushita
- Department of Materials Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo, 152-8550, Japan
| | - Kiyoshi Okada
- Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo, 152-8550, Japan
| | - Akira Fujishima
- Photocatalysis International Research Center, Research Institute for Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba, 278-8510, Japan
| | - Ken-Ichi Katsumata
- Photocatalysis International Research Center, Research Institute for Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba, 278-8510, Japan.,Department of Materials Science and Technology, Faculty of Industrial Science and Technology, Tokyo University of Science, 6-3-1 Niijuku, Katsushika-ku, Tokyo, 125-8585, Japan
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27
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Ameur N, Bachir R. Study of 1D Titanate‐Based Materials –New Modification of the Synthesis Procedure and Surface Properties‐Recent Applications. ChemistrySelect 2020. [DOI: 10.1002/slct.201904539] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Nawal Ameur
- Laboratory of Catalysis and Synthesis in Organic Chemistry (LCSCO)University of Tlemcen BP 119 Tlemcen Algeria
- High School of Electrical and Energetic Engineering of Oran (ESGEE), Bir El Djir Algeria
| | - Redouane Bachir
- Laboratory of Catalysis and Synthesis in Organic Chemistry (LCSCO)University of Tlemcen BP 119 Tlemcen Algeria
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Ma Z, Shi L, Qu W, Hu Q, Chen R, Wang Y, Chen Z. Microwave-assisted synthesis of an RGO/CdS/TiO2 step-scheme with exposed TiO2 {001} facets and enhanced visible photocatalytic activity. RSC Adv 2020; 10:43447-43458. [PMID: 35519675 PMCID: PMC9058394 DOI: 10.1039/d0ra08597a] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Accepted: 11/14/2020] [Indexed: 12/19/2022] Open
Abstract
Semiconductor-based heterojunction photocatalysts with a special active crystal surface act as an essential part in environmental remediation and renewable energy technologies. In this study, an RGO/CdS/TiO2 step-scheme with high energy {001} TiO2 facets was successfully fabricated via a microwave-assisted solvothermal method. The photocatalytic performance of as-prepared samples was assessed by degrading methylene blue under visible light irradiation. We found that the photocatalytic activity of the RGO/CdS/TiO2 step-scheme heterojunction was related to the proportion of TiO2. A ternary sample with a TiO2 content of 10 wt% exhibited superior photocatalytic performance, and approximately 99.7% of methylene blue was degraded during 50 min of visible illumination which was much higher than the percentages found for TiO2, CdS, RGO/TiO2, and RGO/CdS. The greatly improved photocatalytic performance is due to the exposure of the reactive {001} surface of TiO2 and the formation of a CdS/TiO2 heterojunction step-scheme, which effectively inhibits the recombination of charge carriers at the heterogeneous interfaces. Moreover, the incorporation of graphene further enhances the visible light harvesting and serves as an electron transport channel for rapidly separating photogenerated carriers. Based on the PL, XPS, photoelectrochemical properties and the free radical capturing experiment results, a possible photodegradation mechanism was proposed. The photocatalytic enhancement of RGO/CdS/TiO2 is due to the high-energy {001} surface of TiO2 and CdS forming a stepped heterojunction, which is dispersed on the surface of reduced graphene oxide.![]()
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Affiliation(s)
- Zilun Ma
- Faculty of Science
- Kunming University of Science and Technology
- Kunming 650500
- China
| | - Liyan Shi
- Faculty of Science
- Kunming University of Science and Technology
- Kunming 650500
- China
| | - Wenwen Qu
- Faculty of Science
- Kunming University of Science and Technology
- Kunming 650500
- China
- Key Laboratory of Unconventional Metallurgy Education Ministry
| | - Qiong Hu
- Faculty of Science
- Kunming University of Science and Technology
- Kunming 650500
- China
| | - Ruifang Chen
- Faculty of Science
- Kunming University of Science and Technology
- Kunming 650500
- China
| | - Yijun Wang
- Faculty of Science
- Kunming University of Science and Technology
- Kunming 650500
- China
| | - Zhen Chen
- Faculty of Science
- Kunming University of Science and Technology
- Kunming 650500
- China
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29
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Sun Y, Wang F, Fu Y, Chen C, Wang X, Xiao Z, Liu Y, Xu J, Li B, Wang L. Two new inorganic–organic hybrid zinc phosphites and their derived ZnO/ZnS heterostructure for efficient photocatalytic hydrogen production. RSC Adv 2020; 10:812-817. [PMID: 35494426 PMCID: PMC9047063 DOI: 10.1039/c9ra06919d] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2019] [Accepted: 12/02/2019] [Indexed: 12/31/2022] Open
Abstract
Two novel inorganic–organic hybrid zinc phosphites, namely, [Zn(1,2-bimb)0.5(HPO3)]n (1) and [Zn(1,4-bmimb)0.5(HPO3)]n (2), (1,2-bimb = 1,2-bis(imidazol-1ylmethyl)benzene; 1,4-bmimb = 1,4-bis((2-methyl-1H-imidazol-1yl)methyl)benzene) were synthesized for the first time by hydrothermal reaction. Compound 1 generates a three-dimensional (3D) pillared-layer structure with a 2-nodal 3,4-connected 3,4T15 topology. While compound 2 exhibits a 2D hybrid zinc phosphite sheet with a 3,4-connected 3,4L83 topology network. Utilizing compound 1 and compound 2 as templates and Na2S as an etching agent, a series of highly efficient ZnO/ZnS photocatalysts were obtained. The optimized 1-160 sample demonstrates the highest evolution rate of 22.6 mmol g−1 h−1, exceeding the rate of commercial ZnS samples by more than 14.5 times. The remarkable photocatalytic activity should be attributed to the unique heterojunction structure which shortens the free path of charge carriers and enhances the charge separation efficiency. This work provides a facile strategy for preparing photocatalysts with efficient photocatalytic hydrogen production derived from inorganic–organic hybrid material. Though a solvo-thermal synthesis process, two novel inorganic–organic hybrid zinc phosphite were constructed. Using these hybrid zinc phosphite as template, the ZnO/ZnS heterostructures were prepared by a sulfuration method for enhanced photocatalytic performance.![]()
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30
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Gao Z, Sun P, Fang Y, Li C, Yuan X, Zheng X, Gao J. Effect of heat treatment under vacuum on structure and visible-light photocatalytic activity of nano-TiO 2. RSC Adv 2019; 9:32691-32698. [PMID: 35529763 PMCID: PMC9073092 DOI: 10.1039/c9ra03556g] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2019] [Accepted: 09/25/2019] [Indexed: 11/21/2022] Open
Abstract
Nano-TiO2 is known as a photocatalyst with high catalytic activity. However, it should be emphasized that the bandgap of nano-TiO2 is wide, which limits its photocatalytic efficiency in response to visible light and thus hinders its potential application. Improving the photocatalytic activity of nano-TiO2 under visible light by the strategy of heat treatment under vacuum was investigated in this study. The structure and photocatalytic activity of nano-TiO2 before and after heat treatment under vacuum were compared and analyzed by XRD, TEM, HRTEM, XPS and UV-Vis-NIR, respectively. The results show that oxygen vacancies were introduced into the crystal structure of nano-TiO2 to change its inherent energy band structure. Particularly, the samples after heat treatment under vacuum exhibited high photocatalytic activity under visible light. In addition, the formation mechanism of non-stoichiometric compound TiO2-x and the mechanism of oxygen vacancy defects to expand the wavelength of light that nano-TiO2 absorbs to the visible portion of the spectrum have also been addressed in this paper.
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Affiliation(s)
- Zhengyuan Gao
- School of Mechatronics and Automotive Engineering, Chongqing Jiaotong University Chongqing China 400074
| | - Pengfei Sun
- School of Mechatronics and Automotive Engineering, Chongqing Jiaotong University Chongqing China 400074
| | - Yiliu Fang
- School of Mechatronics and Automotive Engineering, Chongqing Jiaotong University Chongqing China 400074
| | - Chuanqiang Li
- School of Materials Science and Engineering, Chongqing Jiaotong University Chongqing China 400074
| | - Xiaoya Yuan
- School of Materials Science and Engineering, Chongqing Jiaotong University Chongqing China 400074
| | - Xuxu Zheng
- School of Mechatronics and Automotive Engineering, Chongqing Jiaotong University Chongqing China 400074
- School of Materials Science and Engineering, Chongqing Jiaotong University Chongqing China 400074
| | - Jiacheng Gao
- School of Materials Science and Engineering, Chongqing University Chongqing China 400044
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31
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Chang YC, Wu SH. Bi-functional Al-doped ZnO@SnO2 heteronanowires as efficient substrates for improving photocatalytic and SERS performance. J IND ENG CHEM 2019. [DOI: 10.1016/j.jiec.2019.03.058] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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32
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Double-sided plasmonic silver nanoparticles decorated copper oxide/zinc oxide heterostructured nanomaces with improving photocatalytic performance. J Photochem Photobiol A Chem 2019. [DOI: 10.1016/j.jphotochem.2019.04.036] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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33
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Yang X, Wu X, Li J, Liu Y. TiO2–Au composite nanofibers for photocatalytic hydrogen evolution. RSC Adv 2019; 9:29097-29104. [PMID: 35528418 PMCID: PMC9071834 DOI: 10.1039/c9ra05113a] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Accepted: 09/09/2019] [Indexed: 01/10/2023] Open
Abstract
TiO2-based materials for photocatalytic hydrogen (H2) evolution have attracted much interest as a renewable approach for clean energy applications. TiO2–Au composite nanofibers (NFs) with an average fiber diameter of ∼160 nm have been fabricated by electrospinning combined with calcination treatment. In situ reduced gold nanoparticles (NPs) with uniform size (∼10 nm) are found to disperse homogenously in the TiO2 NF matrix. The TiO2–Au composite NFs catalyst can significantly enhance the photocatalytic H2 generation with an extremely high rate of 12 440 μmol g−1 h−1, corresponding to an adequate apparent quantum yield of 5.11% at 400 nm, which is 25 times and 10 times those of P25 (584 μmol g−1 h−1) and pure TiO2 NFs (1254 μmol g−1 h−1), respectively. Furthermore, detailed studies indicate that the H2 evolution efficiency of the TiO2–Au composite NF catalyst is highly dependent on the gold content. This work provides a strategy to develop highly efficient catalysts for H2 evolution. The H2 production rate of TiO2–Au nanofibers is dramatically improved to 12 440 μmol g−1 h−1, 10 times that of pure TiO2.![]()
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Affiliation(s)
- Xiaojiao Yang
- College of Materials Science and Engineering
- Sichuan University
- Chengdu 610065
- P. R. China
| | - Xuelian Wu
- International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of MOE
- Institute of Microscale Optoelectronics
- Shenzhen University
- Shenzhen 518060
- China
| | - Jun Li
- College of Materials Science and Engineering
- Sichuan University
- Chengdu 610065
- P. R. China
| | - Ying Liu
- College of Materials Science and Engineering
- Sichuan University
- Chengdu 610065
- P. R. China
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34
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Adepu AK, Goskula S, Chirra S, Siliveri S, Gujjula SR, Narayanan V. Synthesis of a high-surface area V2O5/TiO2–SiO2 catalyst and its application in the visible light photocatalytic degradation of methylene blue. RSC Adv 2019; 9:24368-24376. [PMID: 35527892 PMCID: PMC9069717 DOI: 10.1039/c9ra03866c] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2019] [Accepted: 07/21/2019] [Indexed: 11/21/2022] Open
Abstract
In the present study, we synthesized several high-surface area V2O5/TiO2–SiO2 catalysts (vanado titanium silicate, VTS). The synthesized materials are characterized by PXRD, FE-SEM/EDAX, TEM, BET-surface area, FT-IR, UV-Vis, XPS, fluorescence and photocatalytic studies.
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Affiliation(s)
- Ajay Kumar Adepu
- Department of Chemistry
- National Institute of Technology
- Warangal 506 004
- India
| | - Srinath Goskula
- Department of Chemistry
- National Institute of Technology
- Warangal 506 004
- India
| | - Suman Chirra
- Department of Chemistry
- National Institute of Technology
- Warangal 506 004
- India
| | - Suresh Siliveri
- Department of Chemistry
- National Institute of Technology
- Warangal 506 004
- India
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35
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Kaneza N, Shinde PS, Ma Y, Pan S. Photoelectrochemical study of carbon-modified p-type Cu2O nanoneedles and n-type TiO2−x nanorods for Z-scheme solar water splitting in a tandem cell configuration. RSC Adv 2019; 9:13576-13585. [PMID: 35519550 PMCID: PMC9063928 DOI: 10.1039/c8ra09403a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Revised: 05/17/2019] [Accepted: 04/24/2019] [Indexed: 11/21/2022] Open
Abstract
Nanostructured photoelectrodes with high surface-area and tunable optical-electrical properties can potentially benefit a Z-scheme photoelectrochemical water splitting systems to generate solar fuels at no external bias.
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Affiliation(s)
- Nelly Kaneza
- Department of Chemistry and Biochemistry
- The University of Alabama
- Tuscaloosa
- USA
| | - Pravin S. Shinde
- Department of Chemistry and Biochemistry
- The University of Alabama
- Tuscaloosa
- USA
| | - Yanxiao Ma
- Department of Chemistry and Biochemistry
- The University of Alabama
- Tuscaloosa
- USA
| | - Shanlin Pan
- Department of Chemistry and Biochemistry
- The University of Alabama
- Tuscaloosa
- USA
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