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Awang H, Hezam A, Peppel T, Strunk J. Enhancing the Photocatalytic Activity of Halide Perovskite Cesium Bismuth Bromide/Hydrogen Titanate Heterostructures for Benzyl Alcohol Oxidation. NANOMATERIALS (BASEL, SWITZERLAND) 2024; 14:752. [PMID: 38727346 PMCID: PMC11085227 DOI: 10.3390/nano14090752] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2024] [Revised: 04/11/2024] [Accepted: 04/16/2024] [Indexed: 05/12/2024]
Abstract
Halide perovskite Cs3Bi2Br9 (CBB) has excellent potential in photocatalysis due to its promising light-harvesting properties. However, its photocatalytic performance might be limited due to the unfavorable charge carrier migration and water-induced properties, which limit the stability and photocatalytic performance. Therefore, we address this constraint in this work by synthesizing a stable halide perovskite heterojunction by introducing hydrogen titanate nanosheets (H2Ti3O7-NS, HTiO-NS). Optimizing the weight % (wt%) of CBB enables synthesizing the optimal CBB/HTiO-NS, CBHTNS heterostructure. The detailed morphology and structure characterization proved that the cubic shape of CBB is anchored on the HTiO-NS surface. The 30 wt% CBB/HTiO-NS-30 (CBHTNS-30) heterojunction showed the highest BnOH photooxidation performance with 98% conversion and 75% benzoic acid (BzA) selectivity at 2 h under blue light irradiation. Detailed optical and photoelectrochemical characterization showed that the incorporating CBB and HTiO-NS widened the range of the visible-light response and improved the ability to separate the photo-induced charge carriers. The presence of HTiO-NS has increased the oxidative properties, possibly by charge separation in the heterojunction, which facilitated the generation of superoxide and hydroxyl radicals. A possible reaction pathway for the photocatalytic oxidation of BnOH to BzH and BzA was also suggested. Furthermore, through scavenger experiments, we found that the photogenerated h+, e- and •O2- play an essential role in the BnOH photooxidation, while the •OH have a minor effect on the reaction. This work may provide a strategy for using HTiO-NS-based photocatalyst to enhance the charge carrier migration and photocatalytic performance of CBB.
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Affiliation(s)
- Huzaikha Awang
- Leibniz Institute for Catalysis, Albert-Einstein-Str. 29a, 18059 Rostock, Germany;
- Preparatory Centre for Science and Technology, Universiti Malaysia Sabah, Jalan UMS, Kota Kinabalu 88400, Sabah, Malaysia
| | - Abdo Hezam
- School of Natural Sciences, Technical University of Munich (TUM), Lichtenbergstr. 4, 85748 Garching, Germany;
| | - Tim Peppel
- Leibniz Institute for Catalysis, Albert-Einstein-Str. 29a, 18059 Rostock, Germany;
| | - Jennifer Strunk
- Leibniz Institute for Catalysis, Albert-Einstein-Str. 29a, 18059 Rostock, Germany;
- School of Natural Sciences, Technical University of Munich (TUM), Lichtenbergstr. 4, 85748 Garching, Germany;
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2
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Li M, Du Q, Li G, Qian L, Zeng Y. Metal organic framework-derived transition metal-doped CoS x nanocage for enhanced visible light-assisted methanol electrocatalytic oxidation. Phys Chem Chem Phys 2023; 25:27331-27341. [PMID: 37791573 DOI: 10.1039/d3cp03002d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/05/2023]
Abstract
Designing noble metal-free anode catalysts for visible light-assisted direct methanol fuel cells still remains a significant challenge. In this study, combining the photocatalytic and electrocatalytic properties of CoSx, a visible light-assisted methanol electrocatalytic oxidation strategy was provided. Doping engineering was employed to adjust the electronic structure of CoSx and improve their photoassisted methanol electrocatalytic oxidation activity. Using ZIF-67 as precursor, transition metal-doped CoSx (M-CoSx, M = Zn, Cu, Ni, and Cd) nanocage was synthesized by cation exchange and L-cysteine-controlled etching. Cd doping not only widens the light adsorption to the visible region but also enhances the separation efficiency of photogenerated electron-hole pairs. The electrochemical and photochemical results indicated that the strong oxidative photogenerated hole, OH˙, and O2˙- are beneficial for methanol electrocatalytic oxidation. The synergistic electrocatalytic and photocatalytic effect will be a practical strategy for improving the methanol electrocatalytic oxidation activity of noble metal-free semiconductor catalysts.
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Affiliation(s)
- Meng Li
- College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu, Sichuan, 610059, China.
| | - Quan Du
- College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu, Sichuan, 610059, China.
| | - Guanfeng Li
- College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu, Sichuan, 610059, China.
| | - Lei Qian
- College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu, Sichuan, 610059, China.
| | - Ying Zeng
- College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu, Sichuan, 610059, China.
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3
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Zhang M, Zhang X, Lv M, Yue X, Zheng Z, Xia H. Ethanol Oxidation via 12-Electron Pathway on Spiky Au@AuPd Nanoparticles Assisted by Near-Infrared Light. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2205781. [PMID: 36775916 DOI: 10.1002/smll.202205781] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Revised: 11/13/2022] [Indexed: 05/04/2023]
Abstract
In this work, ethanol oxidation reaction (EOR) via 12-electron (C1-12e) pathway on spiky Au@AuPd nanoparticles (NPs) with ultrathin AuPd alloy shells is achieved in alkaline media with the assistance of the near-infrared (NIR) light. It is found that OH radicals can be produced from the OHads species adsorbed on the surfaces of Pd atoms led by surface plasmon resonance (SPR) effect of spiky Au@AuPd NPs under the irradiation of NIR light. Moreover, OH radicals play the key role for the achievement of EOR proceeded by the desirable C1-12e pathway because OH radicals can directly break the C-C bonds of ethanol. Accordingly, the electrocatalytic performance of spiky Au@AuPd NPs toward EOR under NIR light is greatly improved. For instance, their mass activity can be up to 33.2 A mgpd -1 in the 0.5 m KOH solution containing 0.5 m ethanol, which is about 158 times higher than that of commercial Pd/C catalysts (0.21 A mgpd -1 ) and is better than those of the state-of-the-art Pd-based catalysts reported in literature thus far, to the best of our knowledge. Moreover, their highest mass activity can be further improved to 118.3 A mgpd -1 in the 1.5 m KOH solution containing 1.25 m ethanol.
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Affiliation(s)
- Mengmeng Zhang
- State Key Laboratory of Crystal Materials, Shandong University, Jinan, 250100, P. R. China
| | - Xiang Zhang
- State Key Laboratory of Crystal Materials, Shandong University, Jinan, 250100, P. R. China
| | - Min Lv
- State Key Laboratory of Crystal Materials, Shandong University, Jinan, 250100, P. R. China
| | - Xinru Yue
- State Key Laboratory of Crystal Materials, Shandong University, Jinan, 250100, P. R. China
| | - Zhaoke Zheng
- State Key Laboratory of Crystal Materials, Shandong University, Jinan, 250100, P. R. China
| | - Haibing Xia
- State Key Laboratory of Crystal Materials, Shandong University, Jinan, 250100, P. R. China
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4
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Liu X, Yang Z, Yang Y, Li H. Carbon quantum dots sensitized 2D/2D carbon nitride nanosheets/bismuth tungstate for visible light photocatalytic degradation norfloxacin. CHEMOSPHERE 2022; 287:132126. [PMID: 34492407 DOI: 10.1016/j.chemosphere.2021.132126] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Revised: 08/24/2021] [Accepted: 08/30/2021] [Indexed: 06/13/2023]
Abstract
A novel carbon quantum dots (CQDs) sensitized 2D/2D carbon nitride nanosheets and bismuth tungstate composite (CQD-CNs/BWO) was successfully prepared via the facile hydrothermal method and used for the photocatalytic degradation of norfloxacin (NOR). During 120 min irradiation test, CQD-CNs/BWO exhibited 9 and 1.76 times higher photocatalytic activity than CNs and BWO, respectively. CQDs and constructed 2D/2D structure could not only improve the light harvesting but also promote the generation and separation of electron-holes. The existing inorganic ions in solution (e.g. bicarbonate ions, chlorine ions, and sulfate ions) could inhibit NOR degradation. Based on the electron spin resonance and free radicals inhibition tests, the holes and superoxide radicals rather than hydroxyl radicals were the main reactive species. The intermediates and possible pathways were proposed, and the antibacterial activity of the treated solution after the reaction was evaluated via bacteriostatic tests. The prepared composite material with high photocatalytic activity and stability is potentially effective for the degradation of antibiotics in wastewater.
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Affiliation(s)
- Xinghao Liu
- Center for Environment and Water Resource, College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, PR China; Key Laboratory of Hunan Province for Water Environment and Agriculture Product Safety, Changsha, 410083, PR China
| | - Zhaoguang Yang
- Center for Environment and Water Resource, College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, PR China; Key Laboratory of Hunan Province for Water Environment and Agriculture Product Safety, Changsha, 410083, PR China
| | - Ying Yang
- Center for Environment and Water Resource, College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, PR China; Key Laboratory of Hunan Province for Water Environment and Agriculture Product Safety, Changsha, 410083, PR China.
| | - Haipu Li
- Center for Environment and Water Resource, College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, PR China; Key Laboratory of Hunan Province for Water Environment and Agriculture Product Safety, Changsha, 410083, PR China.
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5
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Jayswal S, Moirangthem RS. Fabrication of hierarchical hybrid ZnO/Au micro-/nanostructures for efficient dye degradation: role of gold nanostructures in photophysical process. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.127555] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Photo-responsive metal/semiconductor hybrid nanostructure: A promising electrocatalyst for solar light enhanced fuel cell reaction. CHINESE CHEM LETT 2021. [DOI: 10.1016/j.cclet.2020.09.049] [Citation(s) in RCA: 41] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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7
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Wadhwa R, Yadav KK, Goswami T, Guchhait SK, Nishanthi ST, Ghosh HN, Jha M. Mechanistic Insights for Photoelectrochemical Ethanol Oxidation on Black Gold Decorated Monoclinic Zirconia. ACS APPLIED MATERIALS & INTERFACES 2021; 13:9942-9954. [PMID: 33606504 DOI: 10.1021/acsami.0c21010] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Surface decoration of metal oxides by metals for enhancing their electrocatalytic properties for organic conversions has attracted a lot of researchers' interest due to their high abundancy, inexpensiveness, and high stability. In the present work, a process for the synthesis of black gold (BG) using a citrate assisted chemical route and m-ZrO2 by a hydrothermal method at 200 °C has been developed. Further, different concentrations of black gold are being used to decorate the surface of zirconia by exploitation of surface potential of zirconia and gold surfaces. The catalyst having 6 mol % concentration of black gold shows excellent electrocatalytic activity for ethanol oxidation with low oxidation peak potential (1.17 V) and high peak current density (8.54 mA cm-2). The current density ratio (jf/jb) is also high (2.54) for this catalyst indicating its high tolerance toward poisoning by intermediate species generated during the catalytic cycle. The enhanced electrocatalytic activity can be attributed to the high tolerance of gold toward CO poisoning and high stability of the ZrO2 support. The black gold decorated zirconia catalyst showed enhanced activity during photoelectrochemical studies when the entire spectrum of light falls on the catalyst. Ultrafast transient studies demonstrated plasmonic excitation of metallic free electrons and subsequent charge separation in the black gold-ZrO2 heterointerface as the key factor for enhanced photoelectrocatalytic activity.
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Affiliation(s)
- Ritika Wadhwa
- Institute of Nano Science & Technology, Knowledge City, Sector-81, Mohali, Punjab-140306, India
| | - Krishna K Yadav
- Institute of Nano Science & Technology, Knowledge City, Sector-81, Mohali, Punjab-140306, India
| | - Tanmay Goswami
- Institute of Nano Science & Technology, Knowledge City, Sector-81, Mohali, Punjab-140306, India
| | - Sujit Kumar Guchhait
- Institute of Nano Science & Technology, Knowledge City, Sector-81, Mohali, Punjab-140306, India
| | - S T Nishanthi
- Electrochemical Power Sources Division, CSIR-CECRI, Karaikudi 630006, Tamil Nadu, India
| | - Hirendra N Ghosh
- Institute of Nano Science & Technology, Knowledge City, Sector-81, Mohali, Punjab-140306, India
- Radiation and Photochemistry Division, Bhabha Atomic Research Centre, Mumbai-400085, India
| | - Menaka Jha
- Institute of Nano Science & Technology, Knowledge City, Sector-81, Mohali, Punjab-140306, India
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8
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Zhang B, Yang F, Ruan X, Yang W, Liu B, Li Y. Construction of a Graphene-Wrapped Pd/SiO 2@TiO 2 Core–Shell Sphere for Enhanced Photoassisted Electrocatalytic Methanol Oxidation Property. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.0c01494] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Bing Zhang
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
| | - Fan Yang
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
| | - Xuejia Ruan
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
| | - Wang Yang
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
| | - Bei Liu
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
| | - Yongfeng Li
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
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9
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He H, Chen R, Zhang L, Williams T, Fang X, Shen W. Fabrication of single-crystalline gold nanowires on cellulose nanofibers. J Colloid Interface Sci 2020; 562:333-341. [PMID: 31855796 DOI: 10.1016/j.jcis.2019.11.093] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2019] [Revised: 11/12/2019] [Accepted: 11/23/2019] [Indexed: 11/16/2022]
Abstract
Cellulose nanofibers (CNF) are promising nanomaterials for functional inks and printed sensors, although the potential applications are currently limited by the available functionalization methods. This work outlines a convenient method to grow a novel and highly conductive network of single-crystalline gold nanowires (AuNW) on CNF for use in conductive inks and printed sensors. The CNF are able to reduce Au (III) precursors to Au (0) monomers and generate nucleation sites for the subsequent monomer-by-monomer growth of Au nanocrystals; sodium citrate is used to control the reduction kinetics and the crystal growth. The growth of these AuNW/CNF materials is a three-step process of redox reaction, isotropic nucleation and anisotropic crystallization: the morphology and crystal structure of Au nanocrystals on CNF can be controlled by adjusting the reaction temperature and concentrations of citrate and CNF. The AuNW/CNF materials obtained have been formulated into highly conductive and atmospherically stable inks for use in either directly writing or screen printing. We have demonstrated AuNW/CNF-printed sensors with highly controllable electrical conductivity as well as excellent stability against rinsing and immersion by water and ethanol.
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Affiliation(s)
- Hui He
- Department of Chemical Engineering, Monash University, Clayton, VIC 3800, Australia.
| | - Ruoyang Chen
- Department of Chemical Engineering, Monash University, Clayton, VIC 3800, Australia.
| | - Liyuan Zhang
- Department of Chemical Engineering, Monash University, Clayton, VIC 3800, Australia; National Local Joint Engineering Laboratory for Advanced Textile Processing and Clean Production, Science & Technology Institute, Wuhan Textile University, Jiangxia, Hubei 430200, PR China.
| | - Timothy Williams
- Monash Centre for Electron Microscopy, Monash University, Clayton, VIC 3800, Australia
| | - Xiya Fang
- Monash Centre for Electron Microscopy, Monash University, Clayton, VIC 3800, Australia
| | - Wei Shen
- Department of Chemical Engineering, Monash University, Clayton, VIC 3800, Australia.
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10
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Chen Q, Wang H, Luan Q, Duan R, Cao X, Fang Y, Ma D, Guan R, Hu X. Synergetic effects of defects and acid sites of 2D-ZnO photocatalysts on the photocatalytic performance. JOURNAL OF HAZARDOUS MATERIALS 2020; 385:121527. [PMID: 31708287 DOI: 10.1016/j.jhazmat.2019.121527] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2019] [Revised: 10/21/2019] [Accepted: 10/22/2019] [Indexed: 06/10/2023]
Abstract
Regulation of defects and surface acidic sites of photocatalysts is an efficient approach to improve the photocatalytic activity. Ultrathin 2D-ZnO photocatalysts were prepared to uncover the synergetic effects of defects and surface acidic sites on the photocatalytic activity. The reaction constant for photocatalytic degradation of MB upon ZnO-S is 2.26, 2.82, 12.2 times higher than that of SH-500, SO-500, and ZnO-R, respectively. The results revealed that the surface defects, hydroxyl group and chemisorbed water played pivotal roles in the generation of reactive oxygen species (ROS). Although the limited improvement of visible absorption was achieved after introduction of oxygen vacancy (VO), the overall photocatalytic activity decreased due to the reduced ROS production capacity shown by density functional theory (DFT) calculations. Hydroxyl radical is the key ROS in degradation of organics, and electron contributes a little bigger than hole in the generation of hydroxyl radical. Importantly, the decrease in surface acidic sites resulted in the decreased photocatalytic activity, proven by the dynamics of photoinduced carriers. This study reveals that the improved photocatalytic activity of 2D-ZnO photocatalysts can be attributed to the synergetic effects of surface defects and acidic sites rather than the enhanced visible absorption resulted from the VO introduction.
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Affiliation(s)
- Qifeng Chen
- School of Materials Science & Engineering, University of Jinan, Nanxinzhuang West Road 336, Jinan, Shandong, 250022, China.
| | - Hui Wang
- School of Materials Science & Engineering, University of Jinan, Nanxinzhuang West Road 336, Jinan, Shandong, 250022, China
| | - Qingrui Luan
- School of Materials Science & Engineering, University of Jinan, Nanxinzhuang West Road 336, Jinan, Shandong, 250022, China
| | - Ran Duan
- Ran Duan, Institute of Chemistry, Chinese Academy of Sciences, Zhongguancun North First Street 2, Beijing, 100190, China
| | - Xingzhong Cao
- Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China
| | - Yanfen Fang
- College of Biological and Pharmaceutical Sciences, China Three Gorges University, Yichang, 443002, China.
| | - Delong Ma
- School of Materials Science & Engineering, University of Jinan, Nanxinzhuang West Road 336, Jinan, Shandong, 250022, China
| | - Ruifang Guan
- School of Materials Science & Engineering, University of Jinan, Nanxinzhuang West Road 336, Jinan, Shandong, 250022, China
| | - Xun Hu
- School of Materials Science & Engineering, University of Jinan, Nanxinzhuang West Road 336, Jinan, Shandong, 250022, China.
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11
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Seng RX, Tan LL, Lee WPC, Ong WJ, Chai SP. Nitrogen-doped carbon quantum dots-decorated 2D graphitic carbon nitride as a promising photocatalyst for environmental remediation: A study on the importance of hybridization approach. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2020; 255:109936. [PMID: 32063312 DOI: 10.1016/j.jenvman.2019.109936] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2019] [Revised: 11/15/2019] [Accepted: 11/25/2019] [Indexed: 06/10/2023]
Abstract
Growing concerns of water pollution by dye pollutants from the textile industry has led to vast research interest to find green solutions to address this issue. In recent years, heterogeneous photocatalysis has harvested tremendous attention from researchers due to its powerful potential applications in tackling many important energy and environmental challenges at a global level. To fully utilise the broad spectrum of solar energy has been a common aim in the photocatalyst industry. This study focuses on the development of an efficient, highly thermal and chemical stable, environmentally friendly and metal-free graphitic carbon nitride (g-C3N4) to overcome the problem of fast charge recombination which hinders photocatalytic performances. Nitrogen-doped carbon quantum dots (NCQDs) known for its high electronic and optical functionality properties is believed to achieve photocatalytic enhancement by efficient charge separation through forming heterogeneous interfaces. Hence, the current work focuses on the hybridisation of NCQDs and g-C3N4 to produce a composite photocatalyst for methylene blue (MB) degradation under LED light irradiation. The optimal hybridisation method and the mass loading required for maximum attainable MB degradation were systematically investigated. The optimum photocatalyst, 1 wt% NCQD/g-C3N4 composite was shown to exhibit a 2.6-fold increase in photocatalytic activity over bare g-C3N4. Moreover, the optimum sample displayed excellent stability and durability after three consecutive degradation cycles, retaining 91.2% of its original efficiency. Scavenging tests were also performed where reactive species, photon-hole (h+) was identified as the primary active species initiating the pollutant degradation mechanism. The findings of this study successfully shed light on the hybridisation methods of NCQDs which improve existing g-C3N4 photocatalyst systems for environmental remediation by utilising solar energy.
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Affiliation(s)
- Ru Xuan Seng
- School of Engineering and Physical Sciences, Heriot-Watt University Malaysia, Jalan Venna P5/2, Precinct 5, 62200, Putrajaya, Malaysia
| | - Lling-Lling Tan
- Multidisciplinary Platform of Advanced Engineering, Chemical Engineering Discipline, School of Engineering, Monash University, Jalan Lagoon Selatan, 47500, Bandar Sunway, Selangor, Malaysia.
| | - W P Cathie Lee
- Multidisciplinary Platform of Advanced Engineering, Chemical Engineering Discipline, School of Engineering, Monash University, Jalan Lagoon Selatan, 47500, Bandar Sunway, Selangor, Malaysia; Entropic Interface Group, Engineering Product Development, Singapore University of Technology and Design, 487372, Singapore
| | - Wee-Jun Ong
- School of Energy and Chemical Engineering, Xiamen University Malaysia, Selangor Darul Ehsan, 43900, Malaysia
| | - Siang-Piao Chai
- Multidisciplinary Platform of Advanced Engineering, Chemical Engineering Discipline, School of Engineering, Monash University, Jalan Lagoon Selatan, 47500, Bandar Sunway, Selangor, Malaysia
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12
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Bera KK, Chakraborty M, Chowdhury SR, Ray A, Das S, Bhattacharya SK. Significantly improved and synergistic effect of Pt–ZnO–Bi2O3 ternary hetero-junctions toward anode-catalytic oxidation of methanol in alkali. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2019.134775] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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13
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Ultrathin bismuth tungstate nanosheets as an effective photo-assisted support for electrocatalytic methanol oxidation. J Colloid Interface Sci 2019; 552:179-185. [DOI: 10.1016/j.jcis.2019.05.048] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2019] [Revised: 05/15/2019] [Accepted: 05/16/2019] [Indexed: 12/16/2022]
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Liu Y, Chen F, Wang Q, Wang J, Wang J, Guo L, Gebremariam TT. Plasmonic-enhanced catalytic activity of methanol oxidation on Au-graphene-Cu nanosandwiches. NANOSCALE 2019; 11:8812-8824. [PMID: 31011725 DOI: 10.1039/c9nr00361d] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The plasmonic-enhanced catalytic activity of methanol oxidation on Au-based catalysts provides a promising strategy for direct methanol fuel cells (DMFCs) to avoid the CO poisoning of traditional Pt-based catalysts. However, the effect of surface plasmon resonance on the light-enhanced methanol oxidation activity of Au or Au-based catalysts has not been fully understood. The mechanism by which hot plasmonic carriers participate in the methanol oxidation reaction (MOR) has not been elucidated. Herein, Au nanoparticles (Au NPs) are loaded on a support of single-layer graphene-Cu contacts (SG/Cu) to construct a nanosandwich structure of a Au-graphene-Cu catalytic electrode (Au-n/SG/Cu). The Au-6T/SG/Cu catalytic electrode exhibits an MOR catalytic activity of approximately 288 μA μg-1 under simulated solar light irradiation, which is approximately 1.7 times higher than that without irradiation. The chemisorption capacity of OH- anions is enhanced on the Au-6T/SG/Cu catalytic electrode compared with the pure Au NP surface. The adsorbed OH- anions are oxidised into ˙OH radicals by the trapped positive holes on the Au NP surface. These OH radicals possessed a high oxidation capacity for the direct oxidation of HCOO- intermediates and promoted the complete methanol oxidation on Au NPs, which is beneficial for improving the fuel efficiency of DMFCs.
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Affiliation(s)
- Yaxing Liu
- State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China.
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15
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Chatterjee D, Shetty S, Müller-Caspary K, Grieb T, Krause FF, Schowalter M, Rosenauer A, Ravishankar N. Ultrathin Au-Alloy Nanowires at the Liquid-Liquid Interface. NANO LETTERS 2018; 18:1903-1907. [PMID: 29397751 DOI: 10.1021/acs.nanolett.7b05217] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Ultrathin bimetallic nanowires are of importance and interest for applications in electronic devices such as sensors and heterogeneous catalysts. In this work, we have designed a new, highly reproducible and generalized wet chemical method to synthesize uniform and monodispersed Au-based alloy (AuCu, AuPd, and AuPt) nanowires with tunable composition using microwave-assisted reduction at the liquid-liquid interface. These ultrathin alloy nanowires are below 4 nm in diameter and about 2 μm long. Detailed microstructural characterization shows that the wires have an face centred cubic (FCC) crystal structure, and they have low-energy twin-boundary and stacking-fault defects along the growth direction. The wires exhibit remarkable thermal and mechanical stability that is critical for important applications. The alloy wires exhibit excellent electrocatalytic activity for methanol oxidation in an alkaline medium.
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Affiliation(s)
- Dipanwita Chatterjee
- Materials Research Centre , Indian Institute of Science , Bangalore 560012 , India
| | - Shwetha Shetty
- Materials Research Centre , Indian Institute of Science , Bangalore 560012 , India
| | | | - Tim Grieb
- University of Bremen , Otto-Hahn-Allee 1 , D-28359 Bremen , Germany
| | - Florian F Krause
- University of Bremen , Otto-Hahn-Allee 1 , D-28359 Bremen , Germany
| | - Marco Schowalter
- University of Bremen , Otto-Hahn-Allee 1 , D-28359 Bremen , Germany
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16
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Plasmon enhanced electrocatalytic oxidation of ethanol and organic contaminants on gold/copper iodide composites under visible light irradiation. J Colloid Interface Sci 2018; 511:110-118. [DOI: 10.1016/j.jcis.2017.09.103] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2017] [Revised: 09/24/2017] [Accepted: 09/28/2017] [Indexed: 11/20/2022]
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17
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Cho KM, Kim KH, Park K, Kim C, Kim S, Al-Saggaf A, Gereige I, Jung HT. Amine-Functionalized Graphene/CdS Composite for Photocatalytic Reduction of CO2. ACS Catal 2017. [DOI: 10.1021/acscatal.7b01908] [Citation(s) in RCA: 147] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kyeong Min Cho
- Department of Chemical & Biomolecular Engineering (BK-21 plus) and KAIST Institute for Nanocentury, Korea Advanced Institute of Science & Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Kyoung Hwan Kim
- Department of Chemical & Biomolecular Engineering (BK-21 plus) and KAIST Institute for Nanocentury, Korea Advanced Institute of Science & Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Kangho Park
- Department of Chemical & Biomolecular Engineering (BK-21 plus) and KAIST Institute for Nanocentury, Korea Advanced Institute of Science & Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Chansol Kim
- Department of Chemical & Biomolecular Engineering (BK-21 plus) and KAIST Institute for Nanocentury, Korea Advanced Institute of Science & Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Sungtak Kim
- Carbon
Resources Conversion Catalytic Research Center, Korea Research Institute of Chemical Technology (KRICT), 141 Gajeongro,
Yuseong-gu, Daejeon 34114, Republic of Korea
| | - Ahmed Al-Saggaf
- Saudi Aramco, Research and Development Center, Dhahran 31311, Saudi Arabia
| | - Issam Gereige
- Saudi Aramco, Research and Development Center, Dhahran 31311, Saudi Arabia
| | - Hee-Tae Jung
- Department of Chemical & Biomolecular Engineering (BK-21 plus) and KAIST Institute for Nanocentury, Korea Advanced Institute of Science & Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
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18
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Sarkar S, Jana R, Vadlamani H, Ramani S, Mumbaraddi D, Peter SC. Facile Aqueous-Phase Synthesis of the PtAu/Bi 2O 3 Hybrid Catalyst for Efficient Electro-Oxidation of Ethanol. ACS APPLIED MATERIALS & INTERFACES 2017; 9:15373-15382. [PMID: 28425705 DOI: 10.1021/acsami.7b00083] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
In this work, we present a facile aqueous-phase synthesis of a hybrid catalyst consisting of PtAu alloy supported on Bi2O3 microspheres. Multistep reduction of HAuCl4 and K2PtCl4 salts on Bi2O3 and subsequent annealing lead to the formation of this hybrid catalyst. To the best of our knowledge, this is the first report of using Bi2O3 as a catalyst support in fuel cell applications. The material was characterized by powder X-ray diffraction and various microscopic techniques. This composite showed remarkable activity as well as stability toward the electro-oxidation of ethanol in comparison to commercially available Pt/C. The order of the reactivity was found to be commercial Pt/C (50.4 mA/m2mgPt-1) < Pt/Bi2O3(10) (108 mA/m2mgPt-1) < PtAu/Bi2O3(10) (459 mA/m2mgPt-1). The enhancement in the activity can be explained through cooperative effects, namely, ligand effects of gold and Bi2O3 support, which helps in removing carbon monoxide molecules to avoid the poisoning of the Pt active sites.
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Affiliation(s)
- Sumanta Sarkar
- New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research , Bengaluru 560064, India
| | - Rajkumar Jana
- New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research , Bengaluru 560064, India
| | - Hiranmayee Vadlamani
- New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research , Bengaluru 560064, India
| | - Swetha Ramani
- New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research , Bengaluru 560064, India
| | - Dundappa Mumbaraddi
- New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research , Bengaluru 560064, India
| | - Sebastian C Peter
- New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research , Bengaluru 560064, India
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19
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Chen Y, Wang Y, Peng J, Xu Q, Weng J, Xu J. Assembly of Ultrathin Gold Nanowires: From Polymer Analogue to Colloidal Block. ACS NANO 2017; 11:2756-2763. [PMID: 28263571 DOI: 10.1021/acsnano.6b07777] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Ultrathin nanowires (NWs) are considered to be ideal building blocks for the assembly of complex nanostructures toward future nanodevices. The polymer/particle duality of ultrathin NWs plays an important role in the study of solution phase self-assembly behavior of ultrathin NWs; yet it has not been fully exploited. Herein, we demonstrate the effects of the polymer/particle duality of ultrathin NWs on the morphologies of assembled complex nanostructures. The length of ultrathin AuNWs directly correlates with the flexibility of NWs and affects the polymer-like assembly of NWs, while the concentration of surfactants determines interfacial tension and ligand-solvent interactions and affects both polymer-like and colloidal assembly of NWs. By fine-tuning these two factors, ultrathin AuNWs can swing between "soft" and "hard" building blocks, and highly uniform nanorings, nanograins, nanobundles, and superlattice-like nanospheres are obtained. The different assembly behavior of long and short NWs can be considered as two components to construct anisotropic complex nanostructures, in analogy with the fabrication of polymer-inorganic nanoparticle hybrid nanostructures. We synthesized anisotropic structures of Au nanodiamond rings and nanonecklaces by the coassembly of polymer-like long NWs with particle-like short NWs or Au nanoparticles. This strategy could potentially be extended to the organization of anisotropic complex nanostructures with other ultrathin NW systems in the future.
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Affiliation(s)
- Yuan Chen
- Department of Biomaterials, College of Materials, Xiamen University , Xiamen 361005, China
| | - Yawen Wang
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University , Nanjing 211816, China
| | - Jian Peng
- Department of Biomaterials, College of Materials, Xiamen University , Xiamen 361005, China
| | - Qingchi Xu
- Department of Physics, Research Institute for Biomimetics and Soft Matter, Fujian Provincial Key Laboratory for Soft Functional Materials, Xiamen University , Xiamen, 361005, China
| | - Jian Weng
- Department of Biomaterials, College of Materials, Xiamen University , Xiamen 361005, China
| | - Jun Xu
- Department of Physics, Research Institute for Biomimetics and Soft Matter, Fujian Provincial Key Laboratory for Soft Functional Materials, Xiamen University , Xiamen, 361005, China
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20
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Zhang Z, Lin S, Li X, Li H, Cui W. Metal free and efficient photoelectrocatalytic removal of organic contaminants over g-C3N4 nanosheet films decorated with carbon quantum dots. RSC Adv 2017. [DOI: 10.1039/c7ra11205j] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
As a typical metal-free semiconductor photocatalyst, a composite photocatalyst comprised of g-C3N4 nanosheets decorated with carbon quantum dots (CQDs/g-C3N4) was synthesized via a simple ultrasonic dispersion self-assembly method.
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Affiliation(s)
- Zisheng Zhang
- School of Chemical Engineering and Technology
- Tianjin University
- Tianjin
- PR China
- Department of Chemical & Biological Engineering
| | - Shuanglong Lin
- School of Chemical Engineering and Technology
- Tianjin University
- Tianjin
- PR China
| | - Xingang Li
- School of Chemical Engineering and Technology
- Tianjin University
- Tianjin
- PR China
- National Engineering Research Center of Distillation Technology
| | - Hong Li
- School of Chemical Engineering and Technology
- Tianjin University
- Tianjin
- PR China
| | - Wenquan Cui
- College of Chemical Engineering
- North China University of Science and Technology
- Tangshan
- PR China
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21
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Zhang J, Su N, Hu X, Zhu F, Yu Y, Yang H. Facile synthesis of Pt nanoparticles supported on anatase TiO2 nanotubes with good photo-electrocatalysis performance for methanol. RSC Adv 2017. [DOI: 10.1039/c7ra11564d] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
A Pt/TNTs/C catalyst showed enhanced MOR performance under the light illumination.
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Affiliation(s)
- Jianbo Zhang
- College of Materials Science and Engineering
- Nanjing Tech University
- Nanjing
- China
- The Synergetic Innovation Center for Advanced Materials
| | - Nan Su
- College of Materials Science and Engineering
- Nanjing Tech University
- Nanjing
- China
- The Synergetic Innovation Center for Advanced Materials
| | - Xiulan Hu
- College of Materials Science and Engineering
- Nanjing Tech University
- Nanjing
- China
- The Synergetic Innovation Center for Advanced Materials
| | - Faquan Zhu
- College of Materials Science and Engineering
- Nanjing Tech University
- Nanjing
- China
- The Synergetic Innovation Center for Advanced Materials
| | - Yawei Yu
- College of Materials Science and Engineering
- Nanjing Tech University
- Nanjing
- China
- The Synergetic Innovation Center for Advanced Materials
| | - Hui Yang
- College of Materials Science and Engineering
- Nanjing Tech University
- Nanjing
- China
- The Synergetic Innovation Center for Advanced Materials
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22
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Cai Q, Hong W, Li J, Jian C, Liu W. A silicon photoanode for efficient ethanol oxidation under alkaline conditions. RSC Adv 2017. [DOI: 10.1039/c7ra02848b] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
A Pt/ZrO2/n-Si electrode has been employed as the anode for the EOR, exhibiting improved EOR activity and durability under solar illumination.
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Affiliation(s)
- Qian Cai
- Key Laboratory of Design and Assembly of Functional Nanostructures
- Fujian Institute of Research on the Structure of Matter
- Chinese Academy of Sciences
- Fuzhou
- China
| | - Wenting Hong
- Key Laboratory of Design and Assembly of Functional Nanostructures
- Fujian Institute of Research on the Structure of Matter
- Chinese Academy of Sciences
- Fuzhou
- China
| | - Jing Li
- Key Laboratory of Design and Assembly of Functional Nanostructures
- Fujian Institute of Research on the Structure of Matter
- Chinese Academy of Sciences
- Fuzhou
- China
| | - Chuanyong Jian
- Key Laboratory of Design and Assembly of Functional Nanostructures
- Fujian Institute of Research on the Structure of Matter
- Chinese Academy of Sciences
- Fuzhou
- China
| | - Wei Liu
- Key Laboratory of Design and Assembly of Functional Nanostructures
- Fujian Institute of Research on the Structure of Matter
- Chinese Academy of Sciences
- Fuzhou
- China
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23
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24
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Leelavathi A, Ahmad R, Singh AK, Madras G, Ravishankar N. Graphene-oxide-supported ultrathin Au nanowires: efficient electrocatalysts for borohydride oxidation. Chem Commun (Camb) 2016; 51:16856-9. [PMID: 26439584 PMCID: PMC4757964 DOI: 10.1039/c5cc06705g] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
We report stable ultrathin Au nanowires supported on reduced graphene oxide with outstanding electrocatalytic activity for borohydride oxidation.
We report stable ultrathin Au nanowires supported on reduced graphene oxide with outstanding electrocatalytic activity for borohydride oxidation. Electrochemical impedance spectroscopy measurements showed abnormal inductive behavior, indicative of surface reactivation. DFT calculations indicate that the origin of the high activity stems from the position of the Au d-band center.
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Affiliation(s)
- Annamalai Leelavathi
- Centre for Nanoscience and Engineering, Indian Institute of Science, Bangalore-560012, India
| | - Rafia Ahmad
- Materials Research Centre, Indian Institute of Science, Bangalore-560012, India.
| | - Abhishek K Singh
- Materials Research Centre, Indian Institute of Science, Bangalore-560012, India.
| | - Giridhar Madras
- Department of Chemical Engineering, Indian Institute of Science, Bangalore-560012, India
| | - N Ravishankar
- Materials Research Centre, Indian Institute of Science, Bangalore-560012, India.
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25
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Zhai C, Zhu M, Pang F, Bin D, Lu C, Goh MC, Yang P, Du Y. High Efficiency Photoelectrocatalytic Methanol Oxidation on CdS Quantum Dots Sensitized Pt Electrode. ACS APPLIED MATERIALS & INTERFACES 2016; 8:5972-5980. [PMID: 26890804 DOI: 10.1021/acsami.5b10234] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
A cadmium sulfide quantum dots sensitized Pt (Pt-CdS) composite was synthesized using a solvothermal method and characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and UV-vis diffuse reflectance spectroscopy. The catalytic properties of the as-prepared electrode for methanol oxidation were evaluated by cyclic voltammetry (CV), chronoamperometry, electrochemical impedance spectrum (EIS) and photocurrent responses. The as-prepared Pt-CdS electrode displayed a significant enhancement in the electrocatalytic activity and stability for methanol oxidation in the presence of visible light irradiation. The synergistic effect of both the electro- and photocatalytic reaction contributes to this enhanced catalytic performance. Our result suggests a new paradigm to construct photoelectrocatalysts with high performance and good stability for direct methanol fuel cells with the assistance of visible-light illumination.
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Affiliation(s)
- Chunyang Zhai
- School of Materials Science and Chemical Engineering, Ningbo University , Ningbo 315211, China
| | - Mingshan Zhu
- School of Materials Science and Chemical Engineering, Ningbo University , Ningbo 315211, China
- Department of Chemistry, University of Toronto , Toronto M5S 3H6, Canada
| | - Fenzhi Pang
- College of Pharmacy, Chemistry Teaching & Research, Suzhou Health College , Suzhou 215009, China
| | - Duan Bin
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University , Suzhou 215123, China
| | - Cheng Lu
- Department of Chemistry, University of Toronto , Toronto M5S 3H6, Canada
| | - M Cynthia Goh
- Department of Chemistry, University of Toronto , Toronto M5S 3H6, Canada
| | - Ping Yang
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University , Suzhou 215123, China
| | - Yukou Du
- School of Materials Science and Chemical Engineering, Ningbo University , Ningbo 315211, China
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University , Suzhou 215123, China
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26
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Lin CT, Chang MN, Huang HJ, Chen CH, Sun RJ, Liao BH, Chau YFC, Hsiao CN, Shiao MH, Tseng FG. Rapid fabrication of three-dimensional gold dendritic nanoforests for visible light-enhanced methanol oxidation. Electrochim Acta 2016. [DOI: 10.1016/j.electacta.2016.01.043] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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27
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Cheng YF, Bi H, Wang C, Cao Q, Jiao W, Che R. Dual-ligand mediated one-pot self-assembly of Cu/ZnO core/shell structures for enhanced microwave absorption. RSC Adv 2016. [DOI: 10.1039/c6ra02184k] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
A facile one-pot method has developed to assemble Cu/ZnO core/shell nanocrystals with different aspect ratios for enhanced microwave absorption. Besides, the one-pot method has shown the appreciable yields and no cumbersome multistep operations.
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Affiliation(s)
- Yi-Feng Cheng
- Laboratory of Advanced Materials
- Department of Materials Science
- Collaborative Innovation Center of Chemistry for Energy Materials
- Fudan University
- Shanghai
| | - Han Bi
- Laboratory of Advanced Materials
- Department of Materials Science
- Collaborative Innovation Center of Chemistry for Energy Materials
- Fudan University
- Shanghai
| | - Chao Wang
- Laboratory of Advanced Materials
- Department of Materials Science
- Collaborative Innovation Center of Chemistry for Energy Materials
- Fudan University
- Shanghai
| | - Qi Cao
- School of Engineering
- The University of Tokyo
- Tokyo 113-8656
- Japan
| | - Wenling Jiao
- Laboratory of Advanced Materials
- Department of Materials Science
- Collaborative Innovation Center of Chemistry for Energy Materials
- Fudan University
- Shanghai
| | - Renchao Che
- Laboratory of Advanced Materials
- Department of Materials Science
- Collaborative Innovation Center of Chemistry for Energy Materials
- Fudan University
- Shanghai
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28
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Di J, Xia J, Ji M, Wang B, Yin S, Zhang Q, Chen Z, Li H. Carbon Quantum Dots Modified BiOCl Ultrathin Nanosheets with Enhanced Molecular Oxygen Activation Ability for Broad Spectrum Photocatalytic Properties and Mechanism Insight. ACS APPLIED MATERIALS & INTERFACES 2015; 7:20111-23. [PMID: 26327205 DOI: 10.1021/acsami.5b05268] [Citation(s) in RCA: 135] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
In this paper, carbon quantum dots (CQDs) modified BiOCl ultrathin nanosheets photocatalyst was synthesized via a facile solvothermal method. The structures, morphologies, optical properties, and photocatalytic properties were investigated in detail. The photocatalytic activity of the obtained CQDs modified BiOCl ultrathin nanosheets photocatalyst was evaluated by the degradation of bisphenol A (BPA) and rhodamine B (RhB) under ultraviolet, visible, and near-infrared light irradiation. The CQDs/BiOCl materials exhibited significantly enhanced photocatalytic performance as compared with pure BiOCl and the 5 wt % CQDs/BiOCl materials displayed the best performance, which showed a broad spectrum of photocatalytic degradation activity. The main active species were determined to be hole and O2•- under visible light irradiation by electron spin resonance (ESR) analysis, XPS valence spectra, and free radicals trapping experiments. The crucial role of CQDs for the improved photocatalytic activity was mainly attributed to the superior electron transfer ability, enhanced light harvesting, and boosted catalytic active sites.
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Affiliation(s)
| | | | | | | | | | - Qi Zhang
- Hainan Provincial Key Lab of Fine Chemistry, Hainan University , Haikou 570228, China
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29
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Wang AL, He XJ, Lu XF, Xu H, Tong YX, Li GR. Palladium-Cobalt Nanotube Arrays Supported on Carbon Fiber Cloth as High-Performance Flexible Electrocatalysts for Ethanol Oxidation. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201410792] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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30
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Wang AL, He XJ, Lu XF, Xu H, Tong YX, Li GR. Palladium-Cobalt Nanotube Arrays Supported on Carbon Fiber Cloth as High-Performance Flexible Electrocatalysts for Ethanol Oxidation. Angew Chem Int Ed Engl 2015; 54:3669-73. [DOI: 10.1002/anie.201410792] [Citation(s) in RCA: 237] [Impact Index Per Article: 26.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2014] [Revised: 12/13/2014] [Indexed: 11/12/2022]
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31
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Fan XL, Zhang CX, Xue HR, Guo H, Song L, He JP. Fabrication of SiO2 incorporated ordered mesoporous TiO2 composite films as functional Pt supports for photo-electrocatalytic methanol oxidation. RSC Adv 2015. [DOI: 10.1039/c5ra12810b] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
SiO2 incorporated ordered mesoporous TiO2 composite films were fabricated as an active support for methanol oxidation and excellent photoelectrocatalytic activity was obtained, showing great potential application prospects.
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Affiliation(s)
- X. L. Fan
- College of Materials Science and Technology
- Jiangsu Key Laboratory of Materials and Technology for Energy Conversion
- Nanjing University of Aeronautics and Astronautics
- 210016 Nanjing
- PR China
| | - C. X. Zhang
- Jiangsu Key Laboratory of Advanced Structural Materials and Application Technology
- College of Materials Engineering
- Nanjing Institute of Technology
- 211167 Nanjing
- PR China
| | - H. R. Xue
- College of Materials Science and Technology
- Jiangsu Key Laboratory of Materials and Technology for Energy Conversion
- Nanjing University of Aeronautics and Astronautics
- 210016 Nanjing
- PR China
| | - H. Guo
- College of Materials Science and Technology
- Jiangsu Key Laboratory of Materials and Technology for Energy Conversion
- Nanjing University of Aeronautics and Astronautics
- 210016 Nanjing
- PR China
| | - L. Song
- College of Materials Science and Technology
- Jiangsu Key Laboratory of Materials and Technology for Energy Conversion
- Nanjing University of Aeronautics and Astronautics
- 210016 Nanjing
- PR China
| | - J. P. He
- College of Materials Science and Technology
- Jiangsu Key Laboratory of Materials and Technology for Energy Conversion
- Nanjing University of Aeronautics and Astronautics
- 210016 Nanjing
- PR China
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