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Zheng Y, Ye Z, Peng X, Zhuang S, Li D, Jin Z. Cobalt vacancy-originated TiMnCoCN compounds with a self-adjusting ability for the high-efficiency acidic oxygen evolution reaction. J Colloid Interface Sci 2023; 652:164-173. [PMID: 37591078 DOI: 10.1016/j.jcis.2023.08.051] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2023] [Revised: 08/06/2023] [Accepted: 08/09/2023] [Indexed: 08/19/2023]
Abstract
Oxygen evolution reaction (OER) electrocatalysts in acidic media, except for precious IrO2, have difficulty realizing good electrocatalytic activity and high electrochemical stability simultaneously. However, the scarcity of IrO2 as an acidic OER electrocatalyst impedes its large-scale application in hydrogen generation, organic synthesis, nonferrous metal production and sewage disposal. Herein, we report the design and fabrication of a nanoporous TiMnCoCN compound based on the nanoscale Kirkendall effect, possessing an intriguing self-adjusting capability for the oxygen evolution reaction (OER) in a 0.5 M H2SO4 solution. The nanoporous TiMnCoCN compound electrode for the acidic OER displays a low overpotential of 143 mV for 10 mA cm-2 and exhibits no increase in potential over 50,000 s, which is ascribed to the self-adjusting ability, Carbon/nitrogen (C/N) incorporation and nanoporous architecture. The concentration of inert TiO2 on the reconstructed surface of the compound can self-adjust with the change in OER potential via a cobalt-dissolved vacancy approach according to the stabilization requirement. In this work, the self-reconstruction law of surface structure was discovered, providing a novel strategy for designing and fabricating nonnoble OER electrocatalysts with superior catalytic performance and robust stability in acidic media.
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Affiliation(s)
- Yuexi Zheng
- School of Materials Science and Engineering, Nanchang Hangkong University, 696#, FengHeNan Road, Nanchang 330063, China
| | - Zhiguo Ye
- School of Materials Science and Engineering, Nanchang Hangkong University, 696#, FengHeNan Road, Nanchang 330063, China.
| | - Xinyuan Peng
- School of Materials Science and Engineering, Nanchang Hangkong University, 696#, FengHeNan Road, Nanchang 330063, China
| | - Shaojie Zhuang
- School of Materials Science and Engineering, Nanchang Hangkong University, 696#, FengHeNan Road, Nanchang 330063, China
| | - Duosheng Li
- School of Materials Science and Engineering, Nanchang Hangkong University, 696#, FengHeNan Road, Nanchang 330063, China
| | - Zhong Jin
- MOE Key Laboratory of Mesoscopic Chemistry, MOE Key Laboratory of High Performance Polymer Materials and Technology, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China.
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Recent Developments in Heterogeneous Photocatalysts with Near-Infrared Response. Symmetry (Basel) 2022. [DOI: 10.3390/sym14102107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Photocatalytic technology has been considered as an efficient protocol to drive chemical reactions in a sustainable and green way. With the assistance of semiconductor-based materials, heterogeneous photocatalysis converts solar energy directly into chemical energy that can be readily stored. It has been employed in several fields including CO2 reduction, H2O splitting, and organic synthesis. Given that near-infrared (NIR) light occupies 47% of sunlight, photocatalytic systems with a NIR response are gaining more and more attention. To enhance the solar-to-chemical conversion efficiency, precise regulation of the symmetric/asymmetric nanostructures and band structures of NIR-response photocatalysts is indispensable. Under the irradiation of NIR light, the symmetric nano-morphologies (e.g., rod-like core-shell shape), asymmetric electronic structures (e.g., defect levels in band gap) and asymmetric heterojunctions (e.g., PN junctions, semiconductor-metal or semiconductor-dye composites) of designed photocatalytic systems play key roles in promoting the light absorption, the separation of electron/hole pairs, the transport of charge carriers to the surface, or the rate of surface photocatalytic reactions. This review will comprehensively analyze the four main synthesis protocols for the fabrication of NIR-response photocatalysts with improved reaction performance. The design methods involve bandgap engineering for the direct utilization of NIR photoenergy, the up-conversion of NIR light into ultraviolet/visible light, and the photothermal effect by converting NIR photons into local heat. Additionally, challenges and perspectives for the further development of heterogeneous photocatalysts with NIR response are also discussed based on their potential applications.
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A highly sensitive photoelectrochemical aptasensor based on BiVO 4 nanoparticles-TiO 2 nanotubes for detection of PCB72. Talanta 2021; 233:122551. [PMID: 34215054 DOI: 10.1016/j.talanta.2021.122551] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2021] [Revised: 05/19/2021] [Accepted: 05/21/2021] [Indexed: 12/27/2022]
Abstract
In this work, a simple and highly sensitive photoelectrochemical (PEC) aptasensor has been developed for detecting PCB72 based on TiO2 nanotubes (NTs) decorated with BiVO4 nanoparticles (NPs). The BiVO4 NPs-TiO2 NTs composites prepared through a simple hydrothermal method exhibit good visible-light adsorption ability, high PEC response and perfect photo-excited stability. The synthesized composites were explored as the photoactive sensing materials for development of a PEC sensing platform for the first time. Here, Au nanoparticles (NPs) were first deposited the composites, and the anti-PCB72 aptamer molecules were immobilized on the Au NPs-deposited BiVO4 NPs-TiO2 NTs. The developed PEC aptasensor exhibits high sensitivity and specificity for PCB72 with a wide linear range from 1 ng/L to 500 ng/L and a low detection limit of 0.23 ng/L. The application of the aptasensor was evaluated by determining PCB 72 in the environment water samples. Thus, a simple and efficient PEC sensing platform was established for detecting the content of PCBs in the environment.
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Li Y, Cao C, Zhang Q, Lu Y, Zhao Y, Li Q, Li X, Huang T. Nanorod bundle-like silver cyanamide nanocrystals for the high-efficiency photocatalytic degradation of tetracycline. RSC Adv 2021; 11:10235-10242. [PMID: 35423481 PMCID: PMC8695649 DOI: 10.1039/d1ra00770j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Accepted: 02/22/2021] [Indexed: 12/15/2022] Open
Abstract
Silver cyanamide (Ag2NCN) is a type of functional semiconductor material with a visible-light response. Ag2NCN nanocrystals with nanorod bundle-like (RB) or straw bundle-like (SB) assemblies were successfully prepared, and it was found that the as-prepared Ag2NCN nanorod bundle (RB) samples had a narrower bandgap of 2.16 eV, which was lower than those reported. As a result, RB samples demonstrated a higher photocatalytic activity towards tetracycline (TC) degradation. The analyses of active species confirmed that both the photo-generated holes and ˙O2 - radicals of the RB sample played significant roles during the process of photocatalytic degradation of TC, and the holes were the main active species. These results indicated that effective charge separation could be achieved by adjusting the morphologies of Ag2NCN nanocrystals. This study provides a new approach to prepare Ag2NCN nanocrystals with a narrower bandgap and strong visible-light response towards antibiotic degradation.
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Affiliation(s)
- Yulin Li
- Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education, College of Chemistry and Materials Science, South-Central University for Nationalities Wuhan 430074 China
| | - Chencong Cao
- Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education, College of Chemistry and Materials Science, South-Central University for Nationalities Wuhan 430074 China
| | - Qing Zhang
- Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education, College of Chemistry and Materials Science, South-Central University for Nationalities Wuhan 430074 China
| | - Ying Lu
- Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education, College of Chemistry and Materials Science, South-Central University for Nationalities Wuhan 430074 China
| | - Yanxi Zhao
- Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education, College of Chemistry and Materials Science, South-Central University for Nationalities Wuhan 430074 China
| | - Qin Li
- Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education, College of Chemistry and Materials Science, South-Central University for Nationalities Wuhan 430074 China
| | - Xianghong Li
- Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education, College of Chemistry and Materials Science, South-Central University for Nationalities Wuhan 430074 China
| | - Tao Huang
- Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education, College of Chemistry and Materials Science, South-Central University for Nationalities Wuhan 430074 China
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Visible-light-promoted oxidative decarboxylation of arylacetic acids in air: Metal-free synthesis of aldehydes and ketones at room temperature. CHINESE CHEM LETT 2020. [DOI: 10.1016/j.cclet.2019.12.031] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Ou W, Zou R, Han M, Yu L, Su C. Tailorable carbazolyl cyanobenzene-based photocatalysts for visible light-induced reduction of aryl halides. CHINESE CHEM LETT 2020. [DOI: 10.1016/j.cclet.2019.12.017] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Wang XM, Wu SH, Ren HT, Zhu PY, Wang C, Liu Y, Sun SW, Zhang XC, Lin YY, Meng ZH, Jia SY, Han X. Formation of hydroperoxo (-OOH) species on the surface of self-doped Bi 2.15WO 6: reactivity towards As(iii) oxidation. Phys Chem Chem Phys 2020; 22:12456-12464. [PMID: 32458845 DOI: 10.1039/d0cp00569j] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Bi2+xWO6 is a cost-effective and environmentally friendly photocatalyst that shows high reactivity in the oxidation of various contaminants under visible light. However, under alkaline conditions, the reactive oxidative species in the Bi2+xWO6 system are still not clear yet. In this study, it is observed that the oxidation rates of As(iii) increase with increasing pH values in the Bi2.15WO6 system. Photoluminescence and the Mott-Schottky analyses confirm that OH- promotes the separation and transfer of photogenerated electron-hole pairs over Bi2.15WO6, thus facilitating the oxidation of As(iii). Electron spin resonance spectra analysis and quenching experiments rule out contributions of •OH, O2˙-, 1O2 and superoxo species to As(iii) oxidation and indicate that surface -OOH and/or H2O2 are indeed the predominant species under alkaline conditions. The improved production of H2O2 by H-donors such as glucose and phenol, as well as the UV-vis diffuse reflectance and Raman analyses, further confirms the formation of surface -OOH on Bi2.15WO6 under alkaline conditions. In the dark, the significant higher oxidation rate of As(iii) by H2O2-Bi2.15WO6 than that by H2O2 alone reveals that surface -OOH, instead of H2O2, plays an important role in As(iii) oxidation. This study enriches our understanding of the diversity of reactive oxygen species (ROS) in the Bi2.15WO6 system and gives new insight into the mechanism involved in the oxidation of As(iii) under alkaline conditions.
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Affiliation(s)
- Xiang-Ming Wang
- School of Chemical Engineering and Technology, Tianjin University, Tianjin, P. R. China
| | - Song-Hai Wu
- School of Chemical Engineering and Technology, Tianjin University, Tianjin, P. R. China
| | - Hai-Tao Ren
- School of Textile Science and Engineering, Tiangong University, Tianjin, P. R. China.
| | - Peng-Yue Zhu
- School of Environmental Science and Engineering, Tianjin University, Tianjin, P. R. China
| | - Cong Wang
- School of Chemical Engineering and Technology, Tianjin University, Tianjin, P. R. China
| | - Yong Liu
- School of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin, P. R. China
| | - Shi-Wei Sun
- School of Chemical Engineering and Technology, Tianjin University, Tianjin, P. R. China
| | - Xiao-Cong Zhang
- School of Chemical Engineering and Technology, Tianjin University, Tianjin, P. R. China
| | - Yi-Ying Lin
- School of Chemical Engineering and Technology, Tianjin University, Tianjin, P. R. China
| | - Zi-He Meng
- School of Chemical Engineering and Technology, Tianjin University, Tianjin, P. R. China
| | - Shao-Yi Jia
- School of Chemical Engineering and Technology, Tianjin University, Tianjin, P. R. China
| | - Xu Han
- School of Chemical Engineering and Technology, Tianjin University, Tianjin, P. R. China and Key Lab of Indoor Air Environment Quality Control, School of Environmental Science and Engineering, Tianjin University, Tianjin, P. R. China.
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Hu D, Pan M, Yu Y, Sun A, Shi K, Qu Y, Qian Z. Application of nanotechnology for enhancing photodynamic therapy via ameliorating, neglecting, or exploiting tumor hypoxia. VIEW 2020. [DOI: 10.1002/viw2.6] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Affiliation(s)
- DanRong Hu
- State Key Laboratory of Biotherapy and Cancer CenterWest China HospitalSichuan University, Collaborative Innovation Center for Biotherapy Chengdu Sichuan P. R. China
| | - Meng Pan
- State Key Laboratory of Biotherapy and Cancer CenterWest China HospitalSichuan University, Collaborative Innovation Center for Biotherapy Chengdu Sichuan P. R. China
| | - Yan Yu
- State Key Laboratory of Biotherapy and Cancer CenterWest China HospitalSichuan University, Collaborative Innovation Center for Biotherapy Chengdu Sichuan P. R. China
| | - Ao Sun
- State Key Laboratory of Biotherapy and Cancer CenterWest China HospitalSichuan University, Collaborative Innovation Center for Biotherapy Chengdu Sichuan P. R. China
| | - Kun Shi
- State Key Laboratory of Biotherapy and Cancer CenterWest China HospitalSichuan University, Collaborative Innovation Center for Biotherapy Chengdu Sichuan P. R. China
| | - Ying Qu
- Department of Hematology and Research Laboratory of HematologyState Key Laboratory of BiotherapyWest China HospitalSichuan University, Collaborative Innovation Center for Biotherapy Chengdu Sichuan P. R. China
| | - ZhiYong Qian
- State Key Laboratory of Biotherapy and Cancer CenterWest China HospitalSichuan University, Collaborative Innovation Center for Biotherapy Chengdu Sichuan P. R. China
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Subbotina IR, Barsukov DV. Direct evidence of the key role of UV-formed peroxide species in photocatalytic gas-solid oxidation in air on anatase TiO 2 particles. Phys Chem Chem Phys 2020; 22:2200-2211. [PMID: 31912826 DOI: 10.1039/c9cp04728j] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
IR spectroscopy was applied for the in situ investigations of surface intermediates formed on the surface of TiO2 (anatase) and ZnO under UV light illumination in air and their reactivity in the elimination of simple pollutant molecules. UV-irradiation of TiO2 (anatase) in air leads to the generation of peroxo-species with the peaks at 852 and 912 cm-1, but the bands of O2˙-ads were not detected. This is, to our knowledge, the first direct in situ IR spectroscopic detection of O2 photosorption intermediates in moist air. The formation of peroxo-species in these conditions is specific for TiO2 (anatase), whereas on ZnO the predominant species under UV light illumination in air are O2˙-ads and H2O2, desorbing into gas phase. Adsorbed water and surface hydroxyl groups contribute to the formation and stabilization of peroxo-species on TiO2 anatase during UV illumination in an oxygen atmosphere. If UV-irradiation is carried out in the environment of moist argon instead of moist air, the peroxo-species on TiO2 anatase are formed from water in a negligible quantity. Peroxo-species formed after O2 photoadsorption on TiO2 anatase in moist air have band positions similar to peroxo-species formed after photodecomposition of H2O2 (with accompanying color change of this sample from yellow to white). Direct experimental IR-spectroscopic evidence of peroxo-species reactivity as oxidative intermediates on TiO2 (anatase) in CO and ethanol vapor photooxidative processes is firstly obtained. These results confirm our early conclusion that peroxo-species formed under UV-irradiation in O2 on the hydrated surface of TiO2 (anatase) can be responsible for the surprising extreme dependence of the CO photooxidation rate on the adsorbed water coverage with the maximum at ∼0.5 ML. The ZnO sample was not active in the photooxidation of these molecules in air. It is concluded that UV formed peroxo-species are important diamagnetic oxidative intermediates in heterogeneous photochemical gas-solid oxidation processes on TiO2 (anatase).
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Affiliation(s)
- Irina Rudol'fovna Subbotina
- N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences Leninsky Prospect 47, Moscow 119991, Russia.
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Wang AL, Dong YT, Li M, Liang C, Li GR. In Situ Derived Ni xFe 1-xOOH/NiFe/Ni xFe 1-xOOH Nanotube Arrays from NiFe Alloys as Efficient Electrocatalysts for Oxygen Evolution. ACS APPLIED MATERIALS & INTERFACES 2017; 9:34954-34960. [PMID: 28926229 DOI: 10.1021/acsami.7b10609] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Herein, NixFe1-xOOH/NiFe/NixFe1-xOOH sandwich-structured nanotube arrays (SNTAs) supported on carbon fiber cloth (CFC) (NixFe1-xOOH/NiFe/NixFe1-xOOH SNTAs-CFC) have been developed as flexible high-performance oxygen evolution reaction (OER) catalysts by a facile in situ electrochemical oxidation of NiFe metallic alloy nanotube arrays during oxygen evolution process. Benefiting from the advantages of high conductivity, hollow nanotube array, and porous structure, NixFe1-xOOH/NiFe/NixFe1-xOOH SNTAs-CFC exhibited a low overpotential of ∼220 mV at the current density of 10 mA cm-2 and a small Tafel slope of 57 mV dec-1 in alkaline solution, both of which are smaller than those of most OER electrocatalysts. Furthermore, NixFe1-xOOH/NiFe/NixFe1-xOOH SNTAs-CFC exhibits excellent stability at 100 mA cm-2 for more than 30 h. It is believed that the present work can provide a valuable route for the design and synthesis of inexpensive and efficient OER electrocatalysts.
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Affiliation(s)
- An-Liang Wang
- MOE Laboratory of Bioinorganic and Synthetic Chemistry, The Key Lab of Low-Carbon Chemistry & Energy Conservation of Guangdong Province, School of Chemistry, and ‡Instrumental Analysis and Research Centre, Sun Yat-sen University , Guangzhou 510275, China
| | - Yu-Tao Dong
- MOE Laboratory of Bioinorganic and Synthetic Chemistry, The Key Lab of Low-Carbon Chemistry & Energy Conservation of Guangdong Province, School of Chemistry, and ‡Instrumental Analysis and Research Centre, Sun Yat-sen University , Guangzhou 510275, China
| | - Mei Li
- MOE Laboratory of Bioinorganic and Synthetic Chemistry, The Key Lab of Low-Carbon Chemistry & Energy Conservation of Guangdong Province, School of Chemistry, and ‡Instrumental Analysis and Research Centre, Sun Yat-sen University , Guangzhou 510275, China
| | - Chaolun Liang
- MOE Laboratory of Bioinorganic and Synthetic Chemistry, The Key Lab of Low-Carbon Chemistry & Energy Conservation of Guangdong Province, School of Chemistry, and ‡Instrumental Analysis and Research Centre, Sun Yat-sen University , Guangzhou 510275, China
| | - Gao-Ren Li
- MOE Laboratory of Bioinorganic and Synthetic Chemistry, The Key Lab of Low-Carbon Chemistry & Energy Conservation of Guangdong Province, School of Chemistry, and ‡Instrumental Analysis and Research Centre, Sun Yat-sen University , Guangzhou 510275, China
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