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Jung J, Jeong JR, Dang Van C, Yoo HY, Lee MH. Morphology-Controlled ZnO@ZnWO 4 Hetero-Nanostructures for Efficient Photooxidation of Water in Near-Neutral pH. ACS APPLIED MATERIALS & INTERFACES 2024; 16:4700-4707. [PMID: 38241524 DOI: 10.1021/acsami.3c16104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/21/2024]
Abstract
One-dimensional ZnO nanorods (NRs) have been extensively studied as photoanodes because of their unique optical properties, high electron mobility, and suitable band positions for water oxidation. However, their practical efficiency is often compromised by chemical instability during water oxidation and high carrier recombination rates. To overcome this issue, precise morphological control of ZnO@ZnWO4 core-shell structured photoanodes, featuring a ZnO core and a ZnWO4 shell was used. This was accomplished by depositing WO3 onto hydrothermally grown ZnO NRs using the thermal chemical vapor deposition process. The photoelectrochemical performance of ZnO@ZnWO4 with an optimized morphology outperforms that of pristine ZnO NRs. Systematic optical and electrochemical analyses of ZnO@ZnWO4 demonstrated that the enhancement is attributed to the enhanced charge transfer efficiency facilitated by the optimized ZnWO4 shells.
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Affiliation(s)
- Jaemin Jung
- Department of Applied Chemistry, Kyung Hee University, Yongin, Gyeonggi 17104, Korea
| | - Jae Ryeol Jeong
- Department of Applied Chemistry, Kyung Hee University, Yongin, Gyeonggi 17104, Korea
| | - Cu Dang Van
- Department of Applied Chemistry, Kyung Hee University, Yongin, Gyeonggi 17104, Korea
| | - Hye Yeon Yoo
- Department of Applied Chemistry, Kyung Hee University, Yongin, Gyeonggi 17104, Korea
| | - Min Hyung Lee
- Department of Applied Chemistry, Kyung Hee University, Yongin, Gyeonggi 17104, Korea
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2
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Lin M, Chen H, Zhang Z, Wang X. Engineering interface structures for heterojunction photocatalysts. Phys Chem Chem Phys 2023; 25:4388-4407. [PMID: 36723139 DOI: 10.1039/d2cp05281d] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Solar photocatalysis is the most ideal solution to global energy concerns and environmental deterioration nowadays. The heterojunction combination has become one of the most successful and effective strategies to design and manufacture composite photocatalysts. Heterojunction structures are widely documented to markedly improve the photocatalytic behavior of materials by enhancing the separation and transfer of photogenerated charges, widening the light absorption range, and broadening redox potentials, which are attributed to the presence of both build-in electric fields at the interface of two different materials and the complementarity between different electron structures. So far, a large number of heterojunction photocatalytic materials have been reported and applied for water splitting, reduction of carbon dioxide and nitrogen, environmental cleaning, etc. This review outlines the recent accomplishments in the design and modification of interface structures in heterojunction photocatalysts, aiming to provide some useful perspectives for future research in this field.
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Affiliation(s)
- Min Lin
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, 350106, P. R. China. .,Qingyuan Innovation Laboratory, Quanzhou, 362801, P. R. China
| | - Hui Chen
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, 350106, P. R. China. .,Qingyuan Innovation Laboratory, Quanzhou, 362801, P. R. China
| | - Zizhong Zhang
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, 350106, P. R. China. .,Qingyuan Innovation Laboratory, Quanzhou, 362801, P. R. China
| | - Xuxu Wang
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, 350106, P. R. China. .,Qingyuan Innovation Laboratory, Quanzhou, 362801, P. R. China
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3
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Niu X, Du Y, Liu J, Li J, Sun J, Guo Y. Facile Synthesis of TiO 2/MoS 2 Composites with Co-Exposed High-Energy Facets for Enhanced Photocatalytic Performance. MICROMACHINES 2022; 13:mi13111812. [PMID: 36363833 PMCID: PMC9696059 DOI: 10.3390/mi13111812] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Revised: 10/14/2022] [Accepted: 10/21/2022] [Indexed: 06/05/2023]
Abstract
In this work, with the the H2TiO3 colloidal suspension and MoS2 as the precursors, TiO2/MoS2 composites composed of anatase TiO2 nanocrystals with co-exposed {101} and [111]-facets (nanorod and nanocuboid), {101} and {010} facets (nanospindle), and MoS2 microspheres constructed by layer-by-layer self-assembly of nanosheets were hydrothermally synthesized under different pH conditions. The characterization has been performed by combining X-ray powder diffraction (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), high resolution TEM (HRTEM), X-ray photoelectron spectroscopy (XPS), photoluminescence (PL) spectra, and UV-visible absorption spectrum analyses. The photocatalytic degradation of rhodamine B (RhB) in an aqueous suspension was employed to evaluate the photocatalytic activity of the as-prepared pHx-TiO2/MoS2 composites. The photocatalytic degradation efficiency of pH3.5-TiO2/MoS2 composite was the highest (99.70%), which was 11.24, 2.98, 1.48, 1.21, 1.09, 1.03, 1.10, and 1.14 times that of Blank, MoS2, CM-TiO2, pH1.5-TiO2/MoS2, pH5.5-TiO2/MoS2, pH7.5-TiO2/MoS2, pH9.5-TiO2/MoS2, pH11.5-TiO2/MoS2, respectively. The pH3.5-TiO2/MoS2 composite exhibited the highest photocatalytic degradation rate, which may be attributed to the synergistic effects of its large specific surface area, suitable heterojunction structure, and favorable photogenerated charge-separation efficiency. This work is expect to provide primary insights into the photocatalytic effect of TiO2/MoS2 composite with co-exposed high-energy facets, and make a contribution to designing more efficient and stable photocatalysts.
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Affiliation(s)
- Xianjun Niu
- Department of Chemistry and Chemical Engineering, Jinzhong University, Jinzhong 030619, China
| | - Yien Du
- Department of Chemistry and Chemical Engineering, Jinzhong University, Jinzhong 030619, China
| | - Jian Liu
- Department of Chemistry and Chemical Engineering, Jinzhong University, Jinzhong 030619, China
| | - Jinxiao Li
- Department of Chemistry and Chemical Engineering, Jinzhong University, Jinzhong 030619, China
| | - Jiayi Sun
- Department of Chemistry and Chemical Engineering, Jinzhong University, Jinzhong 030619, China
| | - Yuwei Guo
- College of Chemistry, Baotou Teachers’ College, Baotou 014030, China
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Approaches for Modifying Oxide-Semiconductor Materials to Increase the Efficiency of Photocatalytic Water Splitting. MATERIALS 2022; 15:ma15144915. [PMID: 35888381 PMCID: PMC9324759 DOI: 10.3390/ma15144915] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Revised: 07/08/2022] [Accepted: 07/12/2022] [Indexed: 12/18/2022]
Abstract
The constant increase in the amount of energy consumed and environmental problems associated with the use of fossil fuels determine the relevance of the search for alternative and renewable energy sources. One of these is hydrogen gas, which can be produced by sunlight-driven photocatalytic water splitting. The decisive role in the efficiency of the process is played by the properties of the photocatalyst. Oxide materials are widely used as photocatalysts due to their appropriate band structure, high-enough photochemical stability and corrosion resistance. However, the bandgap, crystallinity and the surface morphology of oxide materials are subject to improvement. Apart from the properties of the photocatalyst, the parameters of the process influence the hydrogen-production efficiency. This paper outlines the key ways to improve the characteristics of oxide-semiconductor photocatalysts with the optimum parameters of photocatalytic water splitting.
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Jaryal A, Venugopala Rao B, Kailasam K. A Light(er) Approach for the Selective Hydrogenation of 5-Hydroxymethylfurfural to 2,5-Bis(hydroxymethyl)furan without External H 2. CHEMSUSCHEM 2022; 15:e202200430. [PMID: 35451567 DOI: 10.1002/cssc.202200430] [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: 02/28/2022] [Revised: 04/04/2022] [Indexed: 06/14/2023]
Abstract
The selective conversion of 5-hydroxymethyfurfural (HMF), a biomass-derived platform molecule, to value added chemicals can ease the burden on petroleum-based fine chemical synthesis. The active contribution of renewable energy sources along with low cost, environmental friendliness, and a simple reaction system must be adopted for better sustainability. In this context, photocatalytic selective hydrogenation of HMF to 2,5-bis(hydroxymethyl)furan (BHMF) was achieved over P25 titania nanoparticles without chemical squander. Simultaneously the photo-oxidation of p-methoxybenzyl alcohol (MeOBA) to p-methoxybenzaldehyde (MeOBaL), similar to biomass-derived vanillin, was carried out, abolishing the need of additional redox reagents. This system put forward the competent employment of photogenerated excitons for the valorization of lignocellulosic biomass to fine chemicals, which is an urgent requirement for sustainable chemical synthesis.
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Affiliation(s)
- Arpna Jaryal
- Advanced Functional Nanomaterials, Institute of Nano Science and Technology, Mohali, Sector 81, Mohali, 140306, India
| | - Battula Venugopala Rao
- Advanced Functional Nanomaterials, Institute of Nano Science and Technology, Mohali, Sector 81, Mohali, 140306, India
| | - Kamalakannan Kailasam
- Advanced Functional Nanomaterials, Institute of Nano Science and Technology, Mohali, Sector 81, Mohali, 140306, India
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Bhawna, Kumar S, Sharma R, Gupta A, Tyagi A, Singh P, Kumar A, Kumar V. Recent insights into SnO 2-based engineered nanoparticles for sustainable H 2 generation and remediation of pesticides. NEW J CHEM 2022. [DOI: 10.1039/d1nj05808h] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Due to the ongoing industrial revolution and global health pandemics, solar-driven water splitting and pesticide degradation are highly sought to cope with catastrophes such as depleting fossil reservoirs, global warming, and environmental degradation.
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Affiliation(s)
- Bhawna
- Department of Chemistry, Kirori Mal College, University of Delhi, Delhi, India
- Department of Chemistry, University of Delhi, Delhi, India
| | - Sanjeev Kumar
- Department of Chemistry, Kirori Mal College, University of Delhi, Delhi, India
- Department of Chemistry, University of Delhi, Delhi, India
| | - Ritika Sharma
- Department of Biochemistry, University of Delhi, India
| | - Akanksha Gupta
- Department of Chemistry, Sri Venkateswara College, University of Delhi, Delhi, India
| | - Adish Tyagi
- Chemistry Division, Bhabha Atomic Research Centre, Mumbai, India
| | - Prashant Singh
- Department of Chemistry, Atma Ram Sanatan Dharma College, Delhi University, New Delhi, India
| | - Anup Kumar
- School of Physics, Trinity College Dublin, Ireland
| | - Vinod Kumar
- Special Centre for Nano Sciences, Jawaharlal Nehru University, Delhi, India
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7
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Lu H, Tournet J, Dastafkan K, Liu Y, Ng YH, Karuturi SK, Zhao C, Yin Z. Noble-Metal-Free Multicomponent Nanointegration for Sustainable Energy Conversion. Chem Rev 2021; 121:10271-10366. [PMID: 34228446 DOI: 10.1021/acs.chemrev.0c01328] [Citation(s) in RCA: 55] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Global energy and environmental crises are among the most pressing challenges facing humankind. To overcome these challenges, recent years have seen an upsurge of interest in the development and production of renewable chemical fuels as alternatives to the nonrenewable and high-polluting fossil fuels. Photocatalysis, photoelectrocatalysis, and electrocatalysis provide promising avenues for sustainable energy conversion. Single- and dual-component catalytic systems based on nanomaterials have been intensively studied for decades, but their intrinsic weaknesses hamper their practical applications. Multicomponent nanomaterial-based systems, consisting of three or more components with at least one component in the nanoscale, have recently emerged. The multiple components are integrated together to create synergistic effects and hence overcome the limitation for outperformance. Such higher-efficiency systems based on nanomaterials will potentially bring an additional benefit in balance-of-system costs if they exclude the use of noble metals, considering the expense and sustainability. It is therefore timely to review the research in this field, providing guidance in the development of noble-metal-free multicomponent nanointegration for sustainable energy conversion. In this work, we first recall the fundamentals of catalysis by nanomaterials, multicomponent nanointegration, and reactor configuration for water splitting, CO2 reduction, and N2 reduction. We then systematically review and discuss recent advances in multicomponent-based photocatalytic, photoelectrochemical, and electrochemical systems based on nanomaterials. On the basis of these systems, we further laterally evaluate different multicomponent integration strategies and highlight their impacts on catalytic activity, performance stability, and product selectivity. Finally, we provide conclusions and future prospects for multicomponent nanointegration. This work offers comprehensive insights into the development of cost-competitive multicomponent nanomaterial-based systems for sustainable energy-conversion technologies and assists researchers working toward addressing the global challenges in energy and the environment.
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Affiliation(s)
- Haijiao Lu
- Research School of Chemistry, The Australian National University, Canberra, Australian Capital Territory 2601, Australia
| | - Julie Tournet
- Department of Electronic Materials Engineering, Research School of Physics, The Australian National University, Canberra, Australian Capital Territory 2601, Australia
| | - Kamran Dastafkan
- School of Chemistry, The University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Yun Liu
- Research School of Chemistry, The Australian National University, Canberra, Australian Capital Territory 2601, Australia
| | - Yun Hau Ng
- School of Energy and Environment, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong
| | - Siva Krishna Karuturi
- Department of Electronic Materials Engineering, Research School of Physics, The Australian National University, Canberra, Australian Capital Territory 2601, Australia.,Research School of Electrical, Energy and Materials Engineering, The Australian National University, Canberra, Australian Capital Territory 2601, Australia
| | - Chuan Zhao
- School of Chemistry, The University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Zongyou Yin
- Research School of Chemistry, The Australian National University, Canberra, Australian Capital Territory 2601, Australia
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8
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Lai F, Sun Z, Saji SE, He Y, Yu X, Zhao H, Guo H, Yin Z. Machine Learning-Aided Crystal Facet Rational Design with Ionic Liquid Controllable Synthesis. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2021; 17:e2100024. [PMID: 33656246 DOI: 10.1002/smll.202100024] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2021] [Revised: 02/02/2021] [Indexed: 06/12/2023]
Abstract
Crystallographic facets in a crystal carry interior properties and proffer rich functionalities in a wide range of application areas. However, rational prediction, on-demand customization, and accurate synthesis of facets and facet junctions of a crystal are enormously desirable but still challenging. Herein, a framework of machine learning (ML)-aided crystal facet design with ionic liquid controllable synthesis is developed and then demonstrated with the star-material anatase TiO2 . Aided by employing ML to acquire surface energies from facet junction datasource, the relationships between surface energy and growth conditions based on the Langmuir adsorption isotherm are unveiled, enabling to develop controllable facet synthetic strategies. These strategies are successfully verified after applied for synthesizing TiO2 crystals with custom crystal facets and facet junctions under tuning ionic liquid [bmim][BF4 ] experimental conditions. Therefore, this innovative framework integrates data-intensive rational design and experimental controllable synthesis to develop and customize crystallographic facets and facet junctions. This proves the feasibility of an intelligent chemistry future to accelerate the discovery of facet-governed functional material candidates.
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Affiliation(s)
- Fuming Lai
- Materials Interfaces Center, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 440305, China
- Jinhua Advanced Research Institute, Jinhua, 321019, China
| | - Zhehao Sun
- Research School of Chemistry, Australian National University, Canberra, ACT, 2601, Australia
- School of Energy and Power Engineering, Dalian University of Technology, Dalian, 116024, China
| | - Sandra Elizabeth Saji
- Research School of Chemistry, Australian National University, Canberra, ACT, 2601, Australia
| | - Yichuan He
- School of Energy and Power Engineering, Dalian University of Technology, Dalian, 116024, China
| | - Xuefeng Yu
- Materials Interfaces Center, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 440305, China
| | - Haitao Zhao
- Materials Interfaces Center, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 440305, China
| | - Haibo Guo
- School of Materials Science and Engineering, Shanghai University, Shanghai, 200444, China
| | - Zongyou Yin
- Research School of Chemistry, Australian National University, Canberra, ACT, 2601, Australia
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9
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Zhu Z, Wan S, Zhao Y, Qin Y, Ge X, Zhong Q, Bu Y. Recent progress in Bi
2
WO
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‐Based photocatalysts for clean energy and environmental remediation: Competitiveness, challenges, and future perspectives. NANO SELECT 2020. [DOI: 10.1002/nano.202000127] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Affiliation(s)
- Zheng Zhu
- Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology (CICAEET) Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control (AEMPC) UNIST‐NUIST Research Center of Environment and Energy (UNNU) School of Environmental Science and Technology Nanjing University of Information Science and Technology (NUIST) Nanjing P.R. China
| | - Shipeng Wan
- School of Chemical and Engineering Nanjing University of Science and Technology Nanjing P.R. China
| | - Yunxia Zhao
- Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology (CICAEET) Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control (AEMPC) UNIST‐NUIST Research Center of Environment and Energy (UNNU) School of Environmental Science and Technology Nanjing University of Information Science and Technology (NUIST) Nanjing P.R. China
| | - Yong Qin
- Jiangsu Key Laboratory of Advanced Materials and Technology School of Petrochemical Engineering Changzhou University Changzhou Jiangsu P.R. China
| | - Xinlei Ge
- Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology (CICAEET) Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control (AEMPC) UNIST‐NUIST Research Center of Environment and Energy (UNNU) School of Environmental Science and Technology Nanjing University of Information Science and Technology (NUIST) Nanjing P.R. China
| | - Qin Zhong
- School of Chemical and Engineering Nanjing University of Science and Technology Nanjing P.R. China
| | - Yunfei Bu
- Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology (CICAEET) Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control (AEMPC) UNIST‐NUIST Research Center of Environment and Energy (UNNU) School of Environmental Science and Technology Nanjing University of Information Science and Technology (NUIST) Nanjing P.R. China
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10
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Naseem F, Lu P, Zeng J, Lu Z, Ng YH, Zhao H, Du Y, Yin Z. Solid Nanoporosity Governs Catalytic CO 2 and N 2 Reduction. ACS NANO 2020; 14:7734-7759. [PMID: 32539341 DOI: 10.1021/acsnano.0c02731] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Global demand for green and clean energy is increasing day by day owing to ongoing developments by the human race that are changing the face of the earth at a rate faster than ever. Exploring alternative sources of energy to replace fossil fuel consumption has become even more vital to control the growing concentration of CO2, and reduction of CO2 into CO or other useful hydrocarbons (e.g., C1 and C≥2 products), as well as reduction of N2 into ammonia, can greatly help in this regard. Various materials have been developed for the reduction of CO2 and N2. The introduction of pores in these materials by porosity engineering has been demonstrated to be highly effective in increasing the efficiency of the involved redox reactions, over 40% increment for CO2 reduction to date, by providing an increased number of exposed facets, kinks, edges, and catalytically active sites of catalysts. By shaping the surface porous structure, the selectivity of the redox reaction can also be enhanced. In order to better understand this area benefiting rational design for future solutions, this review systematically summarizes and constructively discusses the porosity engineering in catalytic materials, including various synthesis methods, characterization of porous materials, and the effects of porosity on performance of CO2 reduction and N2 reduction.
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Affiliation(s)
- Fizza Naseem
- Research School of Chemistry, Australian National University, Canberra, ACT 2601, Australia
- Department of Chemistry, Government College University, Lahore 54000, Pakistan
| | - Peilong Lu
- Research School of Chemistry, Australian National University, Canberra, ACT 2601, Australia
| | - Jianping Zeng
- Research School of Chemistry, Australian National University, Canberra, ACT 2601, Australia
- School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng 224051, P. R. China
| | - Ziyang Lu
- Research School of Chemistry, Australian National University, Canberra, ACT 2601, Australia
| | - Yun Hau Ng
- School of Energy and Environment, City University of Hong Kong, Kowloon 999077, Hong Kong SAR
| | - Haitao Zhao
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Yaping Du
- School of Materials Science and Engineering & National Institute for Advanced Materials, Nankai University, Tianjin 300071, P. R. China
| | - Zongyou Yin
- Research School of Chemistry, Australian National University, Canberra, ACT 2601, Australia
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Munir A, Haq TU, Saleem M, Qurashi A, Hussain SZ, Sher F, Ul-Hamid A, Jilani A, Hussain I. Controlled engineering of nickel carbide induced N-enriched carbon nanotubes for hydrogen and oxygen evolution reactions in wide pH range. Electrochim Acta 2020. [DOI: 10.1016/j.electacta.2020.136032] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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12
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Pang Y, Zang W, Kou Z, Zhang L, Xu G, Lv J, Gao X, Pan Z, Wang J, Wu Y. Assembling of Bi atoms on TiO 2 nanorods boosts photoelectrochemical water splitting of semiconductors. NANOSCALE 2020; 12:4302-4308. [PMID: 32025688 DOI: 10.1039/d0nr00004c] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Low photoconversion efficiency, high charge transfer resistance and fast recombination rate are the bottlenecks of semiconductor nanomaterials in photoelectrochemical (PEC) water splitting, where the introduction of an appropriate co-catalyst is an effective strategy to improve their performance. In the present study, we have purposely designed atomic-scale dispersed bismuth (Bi) assembled on titanium dioxide nanorods (TiO2), and demonstrated its effective role as a co-catalyst in enhancing the PEC water splitting performance of TiO2. As a result, functionalized Bi/TiO2 generates a high photocurrent intensity at 1.23 VRHE under simulated solar light irradiation, which is 4-fold higher than that of pristine TiO2, exhibiting a significantly improved PEC performance for water splitting. The strategy presented in this study opens a new window for the construction of non-precious metals dispersed at atomic scales as efficient co-catalysts for realizing sustainable solar energy-driven energy conversion and storage.
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Affiliation(s)
- Yajun Pang
- School of Materials Science and Engineering, and Key Laboratory of Advanced Functional Materials and Devices of Anhui Province, Hefei University of Technology, Hefei 230009, China. and Department of Materials Science and Engineering, National University of Singapore, Singapore 117574, Singapore.
| | - Wenjie Zang
- Department of Materials Science and Engineering, National University of Singapore, Singapore 117574, Singapore.
| | - Zongkui Kou
- Department of Materials Science and Engineering, National University of Singapore, Singapore 117574, Singapore.
| | - Lei Zhang
- Department of Materials Science and Engineering, National University of Singapore, Singapore 117574, Singapore.
| | - Guangqing Xu
- School of Materials Science and Engineering, and Key Laboratory of Advanced Functional Materials and Devices of Anhui Province, Hefei University of Technology, Hefei 230009, China. and China International S&T Cooperation Base for Advanced Energy and Environmental Materials, Hefei 230009, China
| | - Jun Lv
- School of Materials Science and Engineering, and Key Laboratory of Advanced Functional Materials and Devices of Anhui Province, Hefei University of Technology, Hefei 230009, China. and China International S&T Cooperation Base for Advanced Energy and Environmental Materials, Hefei 230009, China
| | - Xiaorui Gao
- Department of Materials Science and Engineering, National University of Singapore, Singapore 117574, Singapore.
| | - Zhenghui Pan
- Department of Materials Science and Engineering, National University of Singapore, Singapore 117574, Singapore.
| | - John Wang
- Department of Materials Science and Engineering, National University of Singapore, Singapore 117574, Singapore.
| | - Yucheng Wu
- School of Materials Science and Engineering, and Key Laboratory of Advanced Functional Materials and Devices of Anhui Province, Hefei University of Technology, Hefei 230009, China. and China International S&T Cooperation Base for Advanced Energy and Environmental Materials, Hefei 230009, China
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13
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Synthesis of Porous ZnO Nanosheets and Carbon Nanotube Hybrids as Efficient Photocatalysts via Pulsed Laser Ablation. Catalysts 2019. [DOI: 10.3390/catal9100787] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Zinc oxide (ZnO) has attractive photocatalytic properties. However, the high recombination rate of the photo-excited charge carriers on this material often restricts application. Here, we report that hybridization of one dimensional (1D) carbon nanotubes (CNT) on two dimensional (2D) porous ZnO nanosheets (NS) can be a promising strategy to overcome some of the challenges of ZnO. Specifically, a pulsed laser ablation technique was utilized to hybridize 1D CNT with 2D porous ZnO NS in environmentally friendly as well as super-economic (short time, less than 10 min) conditions. The synthesized ZnO NS-CNT hybrids show a significantly enhanced photocatalytic activity for water splitting relative to their counterpart ZnO NS.
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14
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Zhang D, Chen J, Xiang Q, Li Y, Liu M, Liao Y. Transition-Metal-Ion (Fe, Co, Cr, Mn, Etc.) Doping of TiO2 Nanotubes: A General Approach. Inorg Chem 2019; 58:12511-12515. [DOI: 10.1021/acs.inorgchem.9b01889] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Dainan Zhang
- State Key Laboratory of Electronic Thin Film and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Jiahui Chen
- State Key Laboratory of Electronic Thin Film and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China
- Electronic Technology Company, Ltd. of Dongguan Haoze, Dongguan 523000, China
| | - Quanjun Xiang
- State Key Laboratory of Electronic Thin Film and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Yuanxun Li
- State Key Laboratory of Electronic Thin Film and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Mingzhen Liu
- Center for Applied Chemistry, University of Electronic Science and Technology of China, Chengdu 611731, China
| | - Yulong Liao
- State Key Laboratory of Electronic Thin Film and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China
- Electronic Technology Company, Ltd. of Dongguan Haoze, Dongguan 523000, China
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15
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Jafari Foruzin L, Rezvani Z, Nejati K, Hou Z, Dai H, Asadpour-Zeynali K. High quantum efficiency of photocatalytic water oxidation over the TiO2/MMO nanocomposite under visible-light irradiation. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.111035] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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16
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Hassan MA, Johar MA, Waseem A, Bagal IV, Ha JS, Ryu SW. Type-II ZnO/ZnS core-shell nanowires: Earth-abundant photoanode for solar-driven photoelectrochemical water splitting. OPTICS EXPRESS 2019; 27:A184-A196. [PMID: 30876134 DOI: 10.1364/oe.27.00a184] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Accepted: 01/17/2019] [Indexed: 06/09/2023]
Abstract
A core-shell structure, formed in a nanostructured photoanode, is an effective strategy to achieve high solar-to-hydrogen conversion efficiency. In this study, we present a facile and simple synthesis of a unique vertically aligned ZnO/ZnS core-shell heterostructure nanowires (NWs) on a Si substrate. Well-aligned ZnO NWs were grown on Si (100) substrates on a low-temperature ZnO buffer layer by metal-organic chemical vapor deposition. The ZnO NWs were then coated with various thicknesses of ZnS shell layers using atomic layer deposition. The structural characterizations exhibit the well-developed ZnO/ZnS core-shell NWs heterostructure. The as-prepared ZnO/ZnS core-shell NWs was applied as photoanode for photoelectrochemical (PEC) water splitting. This unique ZnO/ZnS core-shell NWs photoanode shows photocurrent density of 1.21 mA cm-2, which is 8.5 times higher than bare ZnO NWs. The PEC performance and the applied-bias-photon-to-current conversion efficiency of ZnO/ZnS core-shell NWs photoanode are further improved with the optimized ZnS shell. The type-II band alignment of the heterostructure photoanode is the key factor for their excellent PEC performance. Importantly, this type of core-shell NWs heterostructure provides useful insights into novel electrode design and fabrication based on earth abundant materials for low-cost solar fuel generation.
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17
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Liu Z, Lu Z, Bosman M, Li N, Frankcombe TJ, Jia G, Tricoli A, Liu Y, Du Y, Yin Z. Photoactivity and Stability Co-Enhancement: When Localized Plasmons Meet Oxygen Vacancies in MgO. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2018; 14:e1803233. [PMID: 30334350 DOI: 10.1002/smll.201803233] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2018] [Revised: 09/22/2018] [Indexed: 06/08/2023]
Abstract
Durability is still one of the key obstacles for the further development of photocatalytic energy-conversion systems, especially low-dimensional ones. Encouragingly, recent studies show that nanoinsulators such as SiO2 and MgO exhibit substantially enhanced photocatalytic durability than the typical semiconductor p25 TiO2 . Extending this knowledge, MgO-Au plasmonic defect nanosystems are developed that combine the stable photoactivity from MgO surface defects with energy-focusing plasmonics from Au nanoparticles (NPs), where Au NPs are anchored onto monodispersed MgO nanotemplates. Theoretical calculations reveal that the midgap defect (MGD) states in MgO are generated by oxygen vacancies, which provide the main avenues for upward electron transitions under photoexcitation. These electrons drive stable proton photoreduction to H2 gas via water splitting. A synergistic interaction between Au's localized plasmons and MgO's oxygen vacancies is observed here, which enhances MgO's photoactivity and stability simultaneously. Such co-enhancement is attributed to the stable longitudinal-plasmon-free Au NPs, which provide robust hot electrons capable of overcoming the interband transition barrier (≈1.8 eV) to reach proton reduction potential for H2 generation. The demonstrated plasmonic defect nanosystems are expected to open a new avenue for developing highly endurable photoredox systems for the integration of multifunctionalities in energy conversion, environmental decontamination, and climate change mitigation.
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Affiliation(s)
- Zhengqing Liu
- School of Materials Science and Engineering, National Institute for Advanced Materials, Center for Rare Earth and Inorganic Functional Materials, Nankai University, Tianjin, 300350, P. R. China
| | - Ziyang Lu
- Research School of Chemistry, The Australian National University, Canberra, ACT, 2601, Australia
| | - Michel Bosman
- Department of Materials Science and Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore, 117575, Singapore
| | - Na Li
- Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, 710049, P. R. China
| | - Terry J Frankcombe
- School of Physical, Environmental and Mathematical Sciences, University of New South Wales, Canberra, ACT, 2600, Australia
| | - Guohua Jia
- Nanochemistry Research Institute, Department of Chemistry, Curtin University, Perth, Western Australia, 6102, Australia
| | - Antonio Tricoli
- Research School of Engineering, The Australian National University, Canberra, ACT, 2601, Australia
| | - Yun Liu
- Research School of Chemistry, The Australian National University, Canberra, ACT, 2601, Australia
| | - Yaping Du
- School of Materials Science and Engineering, National Institute for Advanced Materials, Center for Rare Earth and Inorganic Functional Materials, Nankai University, Tianjin, 300350, P. R. China
| | - Zongyou Yin
- Research School of Chemistry, The Australian National University, Canberra, ACT, 2601, Australia
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18
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Fu S, Zhang B, Hu H, Zhang Y, Bi Y. ZnO nanowire arrays decorated with PtO nanowires for efficient solar water splitting. Catal Sci Technol 2018. [DOI: 10.1039/c8cy00656c] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Vertically-oriented PtO nanowires have been selectively grown on ZnO nanowire arrays for the first time by a light-controlled method and were utilized as highly efficient OER cocatalysts for remarkably enhancing the PEC performance of water splitting.
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Affiliation(s)
- Shurong Fu
- State Key Laboratory for Oxo Synthesis & Selective Oxidation
- National Engineering Research Center for Fine Petrochemical Intermediates
- Lanzhou Institute of Chemical Physics, CAS
- Lanzhou
- China
| | - Beibei Zhang
- State Key Laboratory for Oxo Synthesis & Selective Oxidation
- National Engineering Research Center for Fine Petrochemical Intermediates
- Lanzhou Institute of Chemical Physics, CAS
- Lanzhou
- China
| | - Hongyan Hu
- State Key Laboratory for Oxo Synthesis & Selective Oxidation
- National Engineering Research Center for Fine Petrochemical Intermediates
- Lanzhou Institute of Chemical Physics, CAS
- Lanzhou
- China
| | - Yajun Zhang
- State Key Laboratory for Oxo Synthesis & Selective Oxidation
- National Engineering Research Center for Fine Petrochemical Intermediates
- Lanzhou Institute of Chemical Physics, CAS
- Lanzhou
- China
| | - Yingpu Bi
- State Key Laboratory for Oxo Synthesis & Selective Oxidation
- National Engineering Research Center for Fine Petrochemical Intermediates
- Lanzhou Institute of Chemical Physics, CAS
- Lanzhou
- China
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19
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Jiang W, Jiang Y, Tong J, Zhang Q, Li S, Tong H, Xia L. Efficient photoelectrochemical water oxidation using a TiO2 nanosphere-decorated BiVO4 heterojunction photoanode. RSC Adv 2018; 8:41439-41444. [PMID: 35559331 PMCID: PMC9091981 DOI: 10.1039/c8ra09072f] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Accepted: 12/03/2018] [Indexed: 12/04/2022] Open
Abstract
Constructing heterojunctions by coupling dissimilar semiconductors is a promising approach to boost charge separation and charge transfer in photoelectrochemical (PEC) water splitting. In this work, we fabricated a highly efficient TiO2/BiVO4 heterojunction photoanode for PEC water oxidation via a simple hydrothermal method. The resulting heterojunction photoanodes show enhanced PEC performance compared to the bare BiVO4 due to the simultaneous improvements in charge separation and charge transfer. Under simulated sunlight illumination (AM 1.5G, 100 mW cm−2), a high photocurrent of 3.3 mA cm−2 was obtained at 1.23 V (vs. the reversible hydrogen electrode (RHE)) in a neutral solution, which exceeds those attained by the previously reported TiO2/BiVO4 heterojunctions. When a molecular Co–cubane catalyst was immobilized onto the electrode, the performance of the TiO2/BiVO4 heterojunction photoanode can be further improved, achieving a higher photocurrent density of 4.6 mA cm−2 at 1.23 V, an almost three-fold enhancement over that of the bare BiVO4. These results engender a promising route to designing an efficient photoelectrode for PEC water splitting. Constructing heterojunctions by coupling dissimilar semiconductors is a promising approach to boost charge separation and charge transfer in photoelectrochemical (PEC) water splitting.![]()
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Affiliation(s)
- Wenchao Jiang
- College of Chemistry
- Liaoning University
- Shenyang 110036
- China
| | - Yi Jiang
- College of Chemistry
- Liaoning University
- Shenyang 110036
- China
| | - Jing Tong
- College of Chemistry
- Liaoning University
- Shenyang 110036
- China
| | - Qian Zhang
- College of Chemistry
- Liaoning University
- Shenyang 110036
- China
| | - Siyuan Li
- College of Chemistry
- Liaoning University
- Shenyang 110036
- China
| | - Haili Tong
- College of Chemistry
- Liaoning University
- Shenyang 110036
- China
| | - Lixin Xia
- College of Chemistry
- Liaoning University
- Shenyang 110036
- China
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20
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Sun Y, Lin H, Wang C, Wu Q, Wang X, Yang M. Morphology-controlled synthesis of TiO2/MoS2 nanocomposites with enhanced visible-light photocatalytic activity. Inorg Chem Front 2018. [DOI: 10.1039/c7qi00491e] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Hollow and yolk–shell heterostructures of TiO2/MoS2 nanocomposites are synthesized via a polymer assisted targeted-etching method and show high photocatalytic activity under sunlight.
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Affiliation(s)
- Yuanqing Sun
- Institute of New Energy Technology
- Ningbo Institute of Industrial Technology
- Chinese Academy of Sciences
- Ningbo
- P. R. China
| | - Huihui Lin
- School of Chemical & Material Engineering
- Jiangnan University
- Wuxi 214122
- P. R. China
| | - Chuanxi Wang
- Institute of New Energy Technology
- Ningbo Institute of Industrial Technology
- Chinese Academy of Sciences
- Ningbo
- P. R. China
| | - Qian Wu
- School of Chemical & Material Engineering
- Jiangnan University
- Wuxi 214122
- P. R. China
| | - Xiaojie Wang
- School of Chemical & Material Engineering
- Jiangnan University
- Wuxi 214122
- P. R. China
| | - Minghui Yang
- Institute of New Energy Technology
- Ningbo Institute of Industrial Technology
- Chinese Academy of Sciences
- Ningbo
- P. R. China
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21
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Mohanta D, Barman K, Jasimuddin S, Ahmaruzzaman M. MnO doped SnO2 nanocatalysts: Activation of wide band gap semiconducting nanomaterials towards visible light induced photoelectrocatalytic water oxidation. J Colloid Interface Sci 2017; 505:756-762. [DOI: 10.1016/j.jcis.2017.06.064] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2017] [Revised: 06/18/2017] [Accepted: 06/19/2017] [Indexed: 10/19/2022]
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22
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Fabrication of layered (CdS-Mn/MoS2/CdTe)-promoted TiO2 nanotube arrays with superior photocatalytic properties. J Colloid Interface Sci 2017; 486:58-66. [DOI: 10.1016/j.jcis.2016.09.048] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2016] [Revised: 09/22/2016] [Accepted: 09/22/2016] [Indexed: 11/18/2022]
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23
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A novel β-MnO 2 micro/nanorod arrays directly grown on flexible carbon fiber fabric for high-performance enzymeless glucose sensing. Electrochim Acta 2017. [DOI: 10.1016/j.electacta.2016.12.130] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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24
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Han H, Kim KM, Lee CW, Lee CS, Pawar RC, Jones JL, Hong YR, Ryu JH, Song T, Kang SH, Choi H, Mhin S. Few-layered metallic 1T-MoS2/TiO2 with exposed (001) facets: two-dimensional nanocomposites for enhanced photocatalytic activities. Phys Chem Chem Phys 2017; 19:28207-28215. [DOI: 10.1039/c7cp05523d] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Titanium dioxide (TiO2) with exposed (001) facets (TiO2(001)) has attractive photocatalytic properties.
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25
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Wang XD, Xu YF, Chen BX, Zhou N, Chen HY, Kuang DB, Su CY. 3D Cathodes of Cupric Oxide Nanosheets Coated onto Macroporous Antimony-Doped Tin Oxide for Photoelectrochemical Water Splitting. CHEMSUSCHEM 2016; 9:3012-3018. [PMID: 27704701 DOI: 10.1002/cssc.201601140] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2016] [Indexed: 06/06/2023]
Abstract
Cupric oxide (CuO), a narrow-bandgap semiconductor, has a band alignment that makes it an ideal photocathode for the renewable production of solar fuels. However, the photoelectrochemical performance of CuO is limited by its poor conductivity and short electron diffusion lengths. Herein, a three-dimensional (3D) architecture consisting of CuO nanosheets supported onto transparent conducting macroporous antimony-doped tin oxide (mpATO@CuONSs) is designed as an excellent photocathode for promoting the hydrogen evolution reaction (HER). Owing to the 3D structure affording superior light-harvesting characteristics, large contact areas with the electrolyte, and highly conductive pathways for separation and transport of charge carriers, the mpATO@CuONSs photocathode produces an impressively high photocurrent density of -4.6 mA cm-2 at 0 V versus the reversible hydrogen electrode (RHE), which is much higher than that of the CuONSs array onto planar FTO glass (-1.9 mA cm-2 ).
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Affiliation(s)
- Xu-Dong Wang
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, Lehn Institute of Functional Materials, School of Chemistry, Sun Yat-sen University, Guangzhou, 510275, PR China
| | - Yang-Fan Xu
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, Lehn Institute of Functional Materials, School of Chemistry, Sun Yat-sen University, Guangzhou, 510275, PR China
| | - Bai-Xue Chen
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, Lehn Institute of Functional Materials, School of Chemistry, Sun Yat-sen University, Guangzhou, 510275, PR China
| | - Ning Zhou
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, Lehn Institute of Functional Materials, School of Chemistry, Sun Yat-sen University, Guangzhou, 510275, PR China
| | - Hong-Yan Chen
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, Lehn Institute of Functional Materials, School of Chemistry, Sun Yat-sen University, Guangzhou, 510275, PR China.
| | - Dai-Bin Kuang
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, Lehn Institute of Functional Materials, School of Chemistry, Sun Yat-sen University, Guangzhou, 510275, PR China.
| | - Cheng-Yong Su
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, Lehn Institute of Functional Materials, School of Chemistry, Sun Yat-sen University, Guangzhou, 510275, PR China
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26
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Vineesh TV, Mubarak S, Hahm MG, Prabu V, Alwarappan S, Narayanan TN. Controllably Alloyed, Low Density, Free-standing Ni-Co and Ni-Graphene Sponges for Electrocatalytic Water Splitting. Sci Rep 2016; 6:31202. [PMID: 27510857 PMCID: PMC4980622 DOI: 10.1038/srep31202] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2016] [Accepted: 07/13/2016] [Indexed: 12/13/2022] Open
Abstract
Synthesis of low cost, durable and efficient electrocatalysts that support oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) are the bottlenecks in water electrolysis. Here we propose a strategy for the development of controllably alloyed, porous, and low density nickel (Ni) and cobalt (Co) based alloys - whose electrocatalytic properties can be tuned to make them multifunctional. Ni and Co based alloy with the chemical structure of Ni1Co2 is identified as an efficient OER catalyst among other stoichiometric structures in terms of over potential @ 10 mAcm(-2) (1.629 V), stability, low tafel slope (87.3 mV/dec), and high Faradaic efficiency (92%), and its OER performance is also found to be on par with the benchmarked IrO2. Tunability in the porous metal synthesis strategy allowed the incorporation of graphene during the Ni sponge formation, and the Ni- incorporated nitrogen doped graphene sponge (Ni-NG) is found to have very high HER activity. A water electrolysis cell fabricated and demonstrated with these freestanding electrodes is found to have high stability (>10 hours) and large current density (10 mAcm(-2) @ 1.6 V), opening new avenues in the design and development of cost effective and light weight energy devices.
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Affiliation(s)
- Thazhe Veettil Vineesh
- CSIR- Central Electrochemical Research Institute (CSIR-CECRI), Karaikudi – 630006, India
- TIFR- Centre for Interdisciplinary Sciences (TCIS), Tata Institute of Fundamental Research, Hyderabad – 500075, India
- Academy of Scientific & Innovative Research, Chennai - 600113, India
| | - Suhail Mubarak
- TIFR- Centre for Interdisciplinary Sciences (TCIS), Tata Institute of Fundamental Research, Hyderabad – 500075, India
| | - Myung Gwan Hahm
- Department of Materials Science and Engineering Inha University, 100 Inharo, Incheon, Nam-gu, 22212, Korea
| | - V. Prabu
- CSIR- Central Electrochemical Research Institute (CSIR-CECRI), Karaikudi – 630006, India
| | - Subbiah Alwarappan
- CSIR- Central Electrochemical Research Institute (CSIR-CECRI), Karaikudi – 630006, India
- Academy of Scientific & Innovative Research, Chennai - 600113, India
| | - Tharangattu N. Narayanan
- TIFR- Centre for Interdisciplinary Sciences (TCIS), Tata Institute of Fundamental Research, Hyderabad – 500075, India
- Academy of Scientific & Innovative Research, Chennai - 600113, India
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27
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Bao Z, Xu X, Zhou G, Hu J. Constructing n-ZnO@Au heterogeneous nanorod arrays on p-Si substrate as efficient photocathode for water splitting. NANOTECHNOLOGY 2016; 27:305403. [PMID: 27306198 DOI: 10.1088/0957-4484/27/30/305403] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Developing ingenious heterostructure photoelectrodes in photoelectrochemical (PEC) cells to both harvest more solar photons and steer desired charge separation flow is a prerequisite challenge for PEC water splitting. Herein a hierarchical p-Si/n-ZnO@Au heterostructure was constructed via large-area growth of one-dimensional (1D) ZnO nanorod arrays (NRAs) on p-Si substrate followed by decorating with Au nanoparticles (NPs), which exhibited remarkably improved photocathode activity for PEC water splitting relative to the bare Si and Si/ZnO NRAs photocathodes. In addition to structural superiorities of 1D NRAs, a series of dynamic contributions from complementary band-gap structure, p-n heterojunctions and Au plasmon towards photon harvesting and charge separation were demonstrated to ensure a well-steered collection of photoelectrons at the exposed ZnO nanorods and Au NPs, enabling substantially improved photocathode performance.
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Affiliation(s)
- Zhijia Bao
- State Key Laboratory of Bioelectronics, Southeast University, Nanjing 210096, People's Republic of China
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28
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Liang Z, Zeng P, Liu P, Zhao C, Xie W, Mai W. Interface Engineering To Boost Photoresponse Performance of Self-Powered, Broad-Bandwidth PEDOT:PSS/Si Heterojunction Photodetector. ACS APPLIED MATERIALS & INTERFACES 2016; 8:19158-67. [PMID: 27391382 DOI: 10.1021/acsami.6b06301] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
UNLABELLED Organic-inorganic hybrid heterojunctions are poised to push toward novel optoelectronics applications, such as photodetectors, but significant challenges complicating practical use remain. Although all organic based photodetectors have been reported with great success, their potential in high-speed, broadband, self-powered photodetectors have not been fully explored. Herein, a self-powered, broad bandwidth of photodetector based on PEDOT PSS/Si heterojunction is built by a facial low temperature spin-coating method. By interface engineering of heterojunction with optimal band alignment and heteromicrostructures, enhanced photoresponse performances are obtained. The bandwidth of the hybrid photodetector could be broadened by 10 kHz after interfacial passivation by a methyl group. Further manipulating the geometrical structure of the hybrid heterojunction with silicon nanowire, a broad spectrum response from 300 to 1100 nm, with bandwidth as high as 40.6 kHz, fast response speed of 2.03 μs and high detection of 4.1 × 10(11) Jones under zero bias was achieved. Meanwhile, the close dependence between the photoresponse performance of heterojunctions and Si nanowire length is observed in the top-coverage configuration. Finally, a coverage effects model is proposed based on the competition of Si bulk and surface recombination, which is also confirmed by the designed bottom-coverage experiment. The mechanisms behind the enhanced photoresponse of the hybrid photodetector is attributed to the optimum band alignment, as well as the optimum balance of carrier dissociation and recombination of heterojunction. The scalable and low temperature method would be of great convenience for large-scale fabrication of the PEDOT PSS/Si hybrid photodetector.
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Affiliation(s)
- Zhimin Liang
- Siyuan Laboratory, Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy Materials, Department of Physics, Jinan University , Guangzhou 510632, People's Republic of China
| | - Pingyang Zeng
- Siyuan Laboratory, Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy Materials, Department of Physics, Jinan University , Guangzhou 510632, People's Republic of China
| | - Pengyi Liu
- Siyuan Laboratory, Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy Materials, Department of Physics, Jinan University , Guangzhou 510632, People's Republic of China
| | - Chuanxi Zhao
- Siyuan Laboratory, Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy Materials, Department of Physics, Jinan University , Guangzhou 510632, People's Republic of China
| | - Weiguang Xie
- Siyuan Laboratory, Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy Materials, Department of Physics, Jinan University , Guangzhou 510632, People's Republic of China
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Jinan University , Guangzhou 510632, People's Republic of China
| | - Wenjie Mai
- Siyuan Laboratory, Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy Materials, Department of Physics, Jinan University , Guangzhou 510632, People's Republic of China
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Jinan University , Guangzhou 510632, People's Republic of China
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29
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Sonication-polished anodic TiO2 nanotube array-based photoanode for efficient solar energy conversion. J Solid State Electrochem 2016. [DOI: 10.1007/s10008-016-3301-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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30
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Gao LF, Wen T, Xu JY, Zhai XP, Zhao M, Hu GW, Chen P, Wang Q, Zhang HL. Iron-Doped Carbon Nitride-Type Polymers as Homogeneous Organocatalysts for Visible Light-Driven Hydrogen Evolution. ACS APPLIED MATERIALS & INTERFACES 2016; 8:617-24. [PMID: 26650485 DOI: 10.1021/acsami.5b09684] [Citation(s) in RCA: 67] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Graphitic carbon nitrides have appeared as a new type of photocatalyst for water splitting, but their broader and more practical applications are oftentimes hindered by the insolubility or difficult dispersion of the material in solvents. We herein prepared novel two-dimensional (2D) carbon nitride-type polymers doped by iron under a mild one-pot method through preorganizing formamide and citric acid precursors into supramolecular structures, which eventually polycondensed into a homogeneous organocatalyst for highly efficient visible light-driven hydrogen evolution with a rate of ∼16.2 mmol g(-1) h(-1) and a quantum efficiency of 0.8%. Laser photolysis and electrochemical impedance spectroscopic measurements suggested that iron-doping enabled strong electron coupling between the metal and the carbon nitride and formed unique electronic structures favoring electron mobilization along the 2D nanomaterial plane, which might facilitate the electron transfer process in the photocatalytic system and lead to efficient H2 evolution. In combination with electrochemical measurements, the electron transfer dynamics during water reduction were depicted, and the earth-abundant Fe-based catalyst may open a sustainable strategy for conversion of sunlight into hydrogen energy and cope with current challenging energy issues worldwide.
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Affiliation(s)
- Lin-Feng Gao
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, Lanzhou University , Lanzhou, 730000, China
| | - Ting Wen
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, Lanzhou University , Lanzhou, 730000, China
| | - Jing-Yin Xu
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, Lanzhou University , Lanzhou, 730000, China
| | - Xin-Ping Zhai
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, Lanzhou University , Lanzhou, 730000, China
| | - Min Zhao
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, Lanzhou University , Lanzhou, 730000, China
| | - Guo-Wen Hu
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, Lanzhou University , Lanzhou, 730000, China
| | - Peng Chen
- School of Pharmacy, Lanzhou University , Lanzhou, 730020, China
| | - Qiang Wang
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, Lanzhou University , Lanzhou, 730000, China
| | - Hao-Li Zhang
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, Lanzhou University , Lanzhou, 730000, China
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31
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Guo Q, Zhang M, Li X, Li X, Li H, Lu Y, Song X, Wang L. A novel CuO/TiO2 hollow nanofiber film for non-enzymatic glucose sensing. RSC Adv 2016. [DOI: 10.1039/c6ra21628e] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
CuO nanoparticles loaded TiO2 hollow nanofibers with porous and hierarchically mesostructured nanostructure lead to excellent glucose biosensing.
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Affiliation(s)
- Qiaohui Guo
- Department of Chemistry and Chemical Engineering
- Jiangxi Normal University
- Nanchang
- China
| | - Man Zhang
- Department of Chemistry and Chemical Engineering
- Jiangxi Normal University
- Nanchang
- China
| | - Xia Li
- Department of Chemistry and Chemical Engineering
- Jiangxi Normal University
- Nanchang
- China
| | - Xinrui Li
- Department of Chemistry and Chemical Engineering
- Jiangxi Normal University
- Nanchang
- China
| | - Haoran Li
- Department of Chemistry and Chemical Engineering
- Jiangxi Normal University
- Nanchang
- China
| | - Yuanjie Lu
- Department of Chemistry and Chemical Engineering
- Jiangxi Normal University
- Nanchang
- China
| | - Xiaoxi Song
- Department of Chemistry and Chemical Engineering
- Jiangxi Normal University
- Nanchang
- China
| | - Li Wang
- Department of Chemistry and Chemical Engineering
- Jiangxi Normal University
- Nanchang
- China
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32
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Mohanta D, Ahmaruzzaman M. Tin oxide nanostructured materials: an overview of recent developments in synthesis, modifications and potential applications. RSC Adv 2016. [DOI: 10.1039/c6ra21444d] [Citation(s) in RCA: 61] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Various structural modifications of tin oxide nanostructures leading to multidimensional applications.
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Affiliation(s)
- Dipyaman Mohanta
- Department of Chemistry
- National Institute of Technology
- Silchar
- India
| | - M. Ahmaruzzaman
- Department of Chemistry
- National Institute of Technology
- Silchar
- India
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33
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Zhou G, Xu X, Ding T, Feng B, Bao Z, Hu J. Well-Steered Charge-Carrier Transfer in 3D Branched CuxO/ZnO@Au Heterostructures for Efficient Photocatalytic Hydrogen Evolution. ACS APPLIED MATERIALS & INTERFACES 2015; 7:26819-26827. [PMID: 26563634 DOI: 10.1021/acsami.5b09027] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Multi-component hetero-nanostructures exhibit multifunctional properties or synergistic performance and are thus considered as attractive materials for energy conversion applications. There is a long-standing demand to construct more sophisticated heterostructures for steering charge-carrier flow in semiconductor systems. Herein we fabricate a large-scale quantity of three-dimensional (3D) branched CuxO/ZnO@Au heterostructure consisting of CuO nanowires (NWs) and grafted ZnO nanodisks (NDs) decorated with Au nanoparticles via sequential hierarchical assemblies. This treelike hetero-nanostructure ensures well-steered transfer of photogenerated electrons to the exposed ZnO NDs, while holes to the CuO backbone NWs with concerted efforts from multi-node p-n junctions, polar ZnO facets, and Au plasmon, resulting in the significantly enhanced photocatalytic hydrogen evolution performance.
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Affiliation(s)
- Gang Zhou
- School of physics Science and Technology, Yangzhou University , Yangzhou 225002, China
| | - Xiaoyong Xu
- School of physics Science and Technology, Yangzhou University , Yangzhou 225002, China
| | - Tao Ding
- School of Electrical and Electronic Engineering, Nanyang Technological University , Nanyang Avenue, 639798 Singapore
| | - Bing Feng
- School of physics Science and Technology, Yangzhou University , Yangzhou 225002, China
| | - Zhijia Bao
- School of physics Science and Technology, Yangzhou University , Yangzhou 225002, China
| | - Jingguo Hu
- School of physics Science and Technology, Yangzhou University , Yangzhou 225002, China
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34
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Li Z, Feng S, Liu S, Li X, Wang L, Lu W. A three-dimensional interconnected hierarchical FeOOH/TiO₂/ZnO nanostructural photoanode for enhancing the performance of photoelectrochemical water oxidation. NANOSCALE 2015; 7:19178-19183. [PMID: 26523803 DOI: 10.1039/c5nr06212h] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
A novel ZnO/TiO2/FeOOH hierarchical nanostructure has been synthesized by a low temperature chemical bath deposition method. The integrated three-dimensional (3D) nanostructure consists of one-dimensional (1D) ZnO/TiO2 core-shell nanowire arrays and two-dimensional (2D) interconnected FeOOH nanosheets. By applying such a hierarchical nanostructure as a photoanode for photoelectrochemical water reaction, higher photostability and photocurrent density are gained compared with the reported ZnO based nanostructures. It is concluded that the giant enhancement of the properties is because, in the process of photoelectrochemical reaction, electron-hole separation and transfer are enhanced efficiently through the ZnO/TiO2 heterojunction, and in the meanwhile, terminal interconnected FeOOH nanosheets play both the roles of a surface catalyst and a protective layer effectively to accelerate water splitting reaction and enhance photostability. Based on such an environmentally friendly hierarchical nanostructure, photoelectrochemical water splitting and other similar reactions could be performed effectively and economically.
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Affiliation(s)
- Zhenhu Li
- Chongqing Key Laboratory of Multi-Scale Manufacturing Technology, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, P. R. China.
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35
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Size Dependent Plasmonic Effect on BiVO4 Photoanodes for Solar Water Splitting. Sci Rep 2015; 5:16660. [PMID: 26581942 PMCID: PMC4652227 DOI: 10.1038/srep16660] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2015] [Accepted: 10/19/2015] [Indexed: 11/08/2022] Open
Abstract
Plasmonic nanostructures show great promise in enhancing the solar water splitting efficiency due to their ability to confine light to extremely small volumes inside semiconductors. While size plays a critical role in the plasmonic performance of Au nanoparticles (AuNPs), its influence on plasmon-assisted water splitting is still not fully understood. This holds especially true for low band gap semiconductors, for which interband excitations occur in wavelength regions that overlap with plasmonic resonances. Here, BiVO4 films are modified with AuNPs of diameters varying from 10 to 80 nm to study the size dependence of the plasmonic effect. Plasmon resonance energy transfer (PRET) is found to be the dominant effect in enhancing the water splitting efficiency of BiVO4. "Hot electron" injection effect is weak in the case of BiVO4/AuNP. This is attributed to the interband excitation of BiVO4, which is unfavourable for the hot electrons accumulation in BiVO4 conduction band. The resonant scattering effect also contributes to the enhanced water splitting efficiency for the larger diameter AuNPs. It is also for the first time found that higher PRET effect can be achieved at larger off-normal irradiation angle.
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36
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Complex self-assembly of pyrimido[4,5-d]pyrimidine nucleoside supramolecular structures. Nat Commun 2015; 5:3108. [PMID: 24457545 PMCID: PMC3916841 DOI: 10.1038/ncomms4108] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2013] [Accepted: 12/13/2013] [Indexed: 02/05/2023] Open
Abstract
Supramolecular self-assembly is not only one of the chemical roots of biological structure but is also drawing attention in different industrial fields. Here we study the mechanism of the formation of a complex flower-shaped supramolecular structure of pyrimido[4,5-d]pyrimidine nucleosides by dynamic light scattering, scanning electron microscopy, differential scanning calorimetry, nuclear magnetic resonance and X-ray analysis. Upon removing the hydroxyl group of sugars, different flower-shaped superstructures can be produced. These works demonstrate that complex self-assembly can indeed be attained through hierarchical non-covalent interactions of single molecules. Furthermore, chimerical structures built from molecular recognition by these monomers indicate their potential in other fields if combined with other chemical entities. Supramolecular self-assembly is a fundamentally important process in fields ranging from structural biology to materials chemistry. Here, the authors report the supramolecular assembly of complex nanostructures from simple nucleosides, and probe the formation process using various in situ techniques.
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37
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Choi Y, Baek M, Zhang Z, Dao VD, Choi HS, Yong K. A two-storey structured photoanode of a 3D Cu2ZnSnS4/CdS/ZnO@steel composite nanostructure for efficient photoelectrochemical hydrogen generation. NANOSCALE 2015; 7:15291-15299. [PMID: 26327311 DOI: 10.1039/c5nr04107d] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A two-storey structured photoanode of a 3D Cu2ZnSnS4(CZTS)/CdS/ZnO@steel composite nanostructure has been fabricated by using the solution method and demonstrated highly efficient photoelectrochemical hydrogen generation due to its contraption in the structure for sufficient light absorption as well as the three step-down band alignments for efficient charge separation and transport. This composite structure is composed of two storeys: the upper storey is the CZTS/CdS/ZnO hetero-nanorods (NRs) covered on the stainless steel mesh; the bottom storey is the CZTS/CdS/ZnO hetero-NRs grown on the FTO glass. The CZTS/CdS/ZnO hetero-NRs have cascade band gaps decreasing from 3.15 to 1.82 eV, which gives them efficient charge transfer and broad photoresponse in the UV to near-IR region, resulting in 47% IPCE in a wide light region from 400 to 500 nm; and the stainless steel mesh serves not only as a conductor for charge transport, but also as a skeleton of the grid structure for absorbing more light. The related mechanism has been investigated, which demonstrates that the two-storey CZTS/CdS/ZnO@steel composite nanostructure would have great potential as a promising photoelectrode with high efficiency and low cost for PEC hydrogen generation.
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Affiliation(s)
- Youngwoo Choi
- Surface Chemistry Laboratory of Electronic Materials, Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang 790-784, Korea.
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38
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Cao Q, Yuan K, Liu Q, Liang C, Wang X, Cheng YF, Li Q, Wang M, Che R. Porous Au-Ag Alloy Particles Inlaid AgCl Membranes As Versatile Plasmonic Catalytic Interfaces with Simultaneous, in Situ SERS Monitoring. ACS APPLIED MATERIALS & INTERFACES 2015; 7:18491-18500. [PMID: 26263301 DOI: 10.1021/acsami.5b04769] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We present a novel porous Au-Ag alloy particles inlaid AgCl membrane as plasmonic catalytic interfaces with real-time, in situ surface-enhanced Raman spectroscopy (SERS) monitoring. The Au-Ag alloy particles inlaid AgCl membranes were obtained via a facile two-step, air-exposed, and room-temperature immersion reaction with appropriate annealing process. Owing to the designed integration of semiconductor component AgCl and noble metal Au-Ag particles, both the catalytic reduction and visible-light-driven photocatalytic activities toward organic contaminants were attained. Specifically, the efficiencies of about 94% of 4-nitrophenol (4-NP, 5 × 10(-5) M) reduction after 8 min of reaction, and degradation of rhodamine 6G (R6G, 10(-5) M) after 12 min of visible light irradiation were demonstrated. Moreover, efficiencies of above 85% of conversion of 4-NP to 4-aminophenol (4-AP) and 90% of R6G degradation were achieved as well after 6 cycles of reactions, by which robust recyclability was confirmed. Further, with distinct SERS signals generated simultaneously from the surfaces of Au-Ag particles under laser excitation, in situ SERS monitoring of the process of catalytic reactions with superior sensitivity and linearity has been realized. Overall, the capability of the Au-Ag particles inlaid AgCl membranes to provide SERS monitored catalytic and visible-light-driven photocatalytic conversion of organic pollutants, along with their mild and cost-effective fabrication method, would make sense for in-depth understanding of the mechanisms of (photo)catalytic reactions, and also future development of potable, multifunctional and integrated catalytic and sensing devices.
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Affiliation(s)
- Qi Cao
- Laboratory of Advanced Materials, Department of Materials Science, Collaborative Innovation Center of Chemistry for Energy Materials, Fudan University , Shanghai 200438, People's Republic of China
- School of Engineering, The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
- Institute of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf , Bautzner Landstraße 400, 01328 Dresden, Germany
| | - Kaiping Yuan
- Laboratory of Advanced Materials, Department of Materials Science, Collaborative Innovation Center of Chemistry for Energy Materials, Fudan University , Shanghai 200438, People's Republic of China
| | - Qinghe Liu
- Laboratory of Advanced Materials, Department of Materials Science, Collaborative Innovation Center of Chemistry for Energy Materials, Fudan University , Shanghai 200438, People's Republic of China
| | - Chongyun Liang
- Department of Chemistry, Fudan University , Shanghai 200433, People's Republic of China
| | - Xiang Wang
- School of Materials Science and Engineering, Tianjin University , Tianjin 300072, People's Republic of China
- School of Engineering, The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Yi-Feng Cheng
- Laboratory of Advanced Materials, Department of Materials Science, Collaborative Innovation Center of Chemistry for Energy Materials, Fudan University , Shanghai 200438, People's Republic of China
| | - Qingqing Li
- Laboratory of Advanced Materials, Department of Materials Science, Collaborative Innovation Center of Chemistry for Energy Materials, Fudan University , Shanghai 200438, People's Republic of China
| | - Min Wang
- Laboratory of Advanced Materials, Department of Materials Science, Collaborative Innovation Center of Chemistry for Energy Materials, Fudan University , Shanghai 200438, People's Republic of China
| | - Renchao Che
- Laboratory of Advanced Materials, Department of Materials Science, Collaborative Innovation Center of Chemistry for Energy Materials, Fudan University , Shanghai 200438, People's Republic of China
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39
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Zhu G, Yin H, Yang C, Cui H, Wang Z, Xu J, Lin T, Huang F. Black Titania for Superior Photocatalytic Hydrogen Production and Photoelectrochemical Water Splitting. ChemCatChem 2015. [DOI: 10.1002/cctc.201500488] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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40
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Wang X, Liow C, Bisht A, Liu X, Sum TC, Chen X, Li S. Engineering interfacial photo-induced charge transfer based on nanobamboo array architecture for efficient solar-to-chemical energy conversion. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2015; 27:2207-2214. [PMID: 25704499 DOI: 10.1002/adma.201405674] [Citation(s) in RCA: 78] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2014] [Revised: 01/20/2015] [Indexed: 06/04/2023]
Abstract
Engineering interfacial photo-induced charge transfer for highly synergistic photocatalysis is successfully realized based on nanobamboo array architecture. Programmable assemblies of various components and heterogeneous interfaces, and, in turn, engineering of the energy band structure along the charge transport pathways, play a critical role in generating excellent synergistic effects of multiple components for promoting photocatalytic efficiency.
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Affiliation(s)
- Xiaotian Wang
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
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41
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Li X, Wang Z, Zhang Z, Chen L, Cheng J, Ni W, Wang B, Xie E. Light illuminated α-Fe2O3/Pt nanoparticles as water activation agent for photoelectrochemical water splitting. Sci Rep 2015; 5:9130. [PMID: 25773684 PMCID: PMC5390902 DOI: 10.1038/srep09130] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2014] [Accepted: 02/19/2015] [Indexed: 12/03/2022] Open
Abstract
The photoelectrochemical (PEC) water splitting is hampered by strong bonds of H2O molecules and low ionic conductivity of pure water. The photocatalysts dispersed in pure water can serve as a water activation agent, which provides an alternative pathway to overcome such limitations. Here we report that the light illuminated α−Fe2O3/Pt nanoparticles may produce a reservoir of reactive intermediates including H2O2, ·OH, OH− and H+ capable of promoting the pure water reduction/oxidation half−reactions at cathode and highly photocatalytic−active TiO2/In2S3/AgInS2 photoanode, respectively. Remarkable photocurrent enhancement has been obtained with α−Fe2O3/Pt as water activation agent. The use of α−Fe2O3/Pt to promote the reactivity of pure water represents a new paradigm for reproducible hydrogen fuel provision by PEC water splitting, allowing efficient splitting of pure water without adding of corrosive chemicals or sacrificial agent.
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Affiliation(s)
- Xiaodong Li
- 1] Institute of Chemical Materials, China Academy of Engineering Physics, Mianyang 621900, Sichuan, P.R. China [2] Sichuan Research Center of New Materials, Mianyang 621900, Sichuan, P.R. China
| | - Zhi Wang
- Institute of Chemical Materials, China Academy of Engineering Physics, Mianyang 621900, Sichuan, P.R. China
| | - Zemin Zhang
- School of Physical Science and Technology, Lanzhou University, Lanzhou 730000, Gansu, P.R. China
| | - Lulu Chen
- School of Physical Science and Technology, Lanzhou University, Lanzhou 730000, Gansu, P.R. China
| | - Jianli Cheng
- 1] Institute of Chemical Materials, China Academy of Engineering Physics, Mianyang 621900, Sichuan, P.R. China [2] Sichuan Research Center of New Materials, Mianyang 621900, Sichuan, P.R. China
| | - Wei Ni
- 1] Institute of Chemical Materials, China Academy of Engineering Physics, Mianyang 621900, Sichuan, P.R. China [2] Sichuan Research Center of New Materials, Mianyang 621900, Sichuan, P.R. China
| | - Bin Wang
- 1] Institute of Chemical Materials, China Academy of Engineering Physics, Mianyang 621900, Sichuan, P.R. China [2] Sichuan Research Center of New Materials, Mianyang 621900, Sichuan, P.R. China
| | - Erqing Xie
- School of Physical Science and Technology, Lanzhou University, Lanzhou 730000, Gansu, P.R. China
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42
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Huang J, Zhu Y, Yang X, Chen W, Zhou Y, Li C. Flexible 3D porous CuO nanowire arrays for enzymeless glucose sensing: in situ engineered versus ex situ piled. NANOSCALE 2015; 7:559-69. [PMID: 25415769 DOI: 10.1039/c4nr05620e] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Convenient determination of glucose in a sensitive, reliable and cost-effective way has aroused sustained research passion, bringing along assiduous investigation of high-performance electroactive nanomaterials to build enzymeless sensors. In addition to the intrinsic electrocatalytic capability of the sensing materials, electrode architecture at the microscale is also crucial for fully enhancing the performance. In this work, free-standing porous CuO nanowire (NW) was taken as a model sensing material to illustrate this point, where an in situ formed 3D CuO nanowire array (NWA) and CuO nanowires pile (NWP) immobilized with polymer binder by conventional drop-casting technique were both studied for enzymeless glucose sensing. The NWA electrode exhibited greatly promoted electrochemistry characterized by decreased overpotential for electro-oxidation of glucose and over 5-fold higher sensitivity compared to the NWP counterpart, benefiting from the binder-free nanoarray structure. Besides, its sensing performance was also satisfying in terms of rapidness, selectivity and durability. Further, the CuO NWA was utilized to fabricate a flexible sensor which showed excellent performance stability against mechanical bending. Thanks to its favorable electrode architecture, the CuO NWA is believed to offer opportunities for building high-efficiency flexible electrochemical devices.
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Affiliation(s)
- Jianfei Huang
- Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China.
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43
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Guo E, Yin L. Nitrogen doped TiO2–CuxO core–shell mesoporous spherical hybrids for high-performance dye-sensitized solar cells. Phys Chem Chem Phys 2015; 17:563-74. [DOI: 10.1039/c4cp03132f] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report on high-performance dye-sensitized solar cells (DSSCs) based on nitrogen doped anatase TiO2–CuxO core–shell mesoporous hybrids synthesized through a facile and controlled combined sol–gel and hydrothermal process in the presence of hexadecylamine as the structure-directing agent.
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Affiliation(s)
- Enyan Guo
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials
- Ministry of Education
- School of Materials Science and Engineering
- Shandong University
- Jinan 250061
| | - Longwei Yin
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials
- Ministry of Education
- School of Materials Science and Engineering
- Shandong University
- Jinan 250061
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44
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Wang T, Jin B, Jiao Z, Lu G, Ye J, Bi Y. Electric field-directed growth and photoelectrochemical properties of cross-linked Au–ZnO hetero-nanowire arrays. Chem Commun (Camb) 2015; 51:2103-6. [DOI: 10.1039/c4cc09628b] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Herein, we demonstrate a simple and effective strategy for vertically growing Au nanowires over ZnO nanowire arrays to construct a cross-linked hierarchical architecture, which exhibit excellent photoelectrochemical performances under visible light irradiation.
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Affiliation(s)
- Teng Wang
- State Key Laboratory for Oxo Synthesis & Selective Oxidation
- and National Engineering Research Center for Fine Petrochemical Intermediates
- Lanzhou Institute of Chemical Physics
- CAS
- Lanzhou 730000
| | - Bingjun Jin
- State Key Laboratory for Oxo Synthesis & Selective Oxidation
- and National Engineering Research Center for Fine Petrochemical Intermediates
- Lanzhou Institute of Chemical Physics
- CAS
- Lanzhou 730000
| | - Zhengbo Jiao
- State Key Laboratory for Oxo Synthesis & Selective Oxidation
- and National Engineering Research Center for Fine Petrochemical Intermediates
- Lanzhou Institute of Chemical Physics
- CAS
- Lanzhou 730000
| | - Gongxuan Lu
- State Key Laboratory for Oxo Synthesis & Selective Oxidation
- and National Engineering Research Center for Fine Petrochemical Intermediates
- Lanzhou Institute of Chemical Physics
- CAS
- Lanzhou 730000
| | - Jinhua Ye
- TU-NIMS Joint Research Center
- School of Materials Science and Engineering
- Tianjin University
- Tianjin 300072
- P. R. China
| | - Yingpu Bi
- State Key Laboratory for Oxo Synthesis & Selective Oxidation
- and National Engineering Research Center for Fine Petrochemical Intermediates
- Lanzhou Institute of Chemical Physics
- CAS
- Lanzhou 730000
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45
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Hu P, Ngaw CK, Tay YY, Cao S, Barber J, Tan TTY, Loo SCJ. A “uniform” heterogeneous photocatalyst: integrated p–n type CuInS2/NaInS2 nanosheets by partial ion exchange reaction for efficient H2 evolution. Chem Commun (Camb) 2015; 51:9381-4. [DOI: 10.1039/c5cc02237a] [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]
Abstract
Single-crystalline-like p–n type CuInS2/NaInS2 heterogeneous nanosheets were synthesized by partial cation exchange reaction.
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Affiliation(s)
- Peng Hu
- Solar Fuels Lab
- School of Materials Science and Engineering
- Nanyang Technological University
- 639798 Singapore
- State Key Laboratory of Multiphase Complex Systems
| | - Chee Keong Ngaw
- Solar Fuels Lab
- School of Materials Science and Engineering
- Nanyang Technological University
- 639798 Singapore
- Solar Fuels Lab
| | - Yee Yan Tay
- Solar Fuels Lab
- School of Materials Science and Engineering
- Nanyang Technological University
- 639798 Singapore
- Facility for Analysis
| | - Shaowen Cao
- Solar Fuels Lab
- School of Materials Science and Engineering
- Nanyang Technological University
- 639798 Singapore
| | - James Barber
- Solar Fuels Lab
- School of Materials Science and Engineering
- Nanyang Technological University
- 639798 Singapore
- Division of Molecular Bioscience
| | - Timothy Thatt Yang Tan
- Solar Fuels Lab
- School of Chemical and Biomedical Engineering
- Nanyang Technological University
- 637459 Singapore
| | - Say Chye Joachim Loo
- Solar Fuels Lab
- School of Materials Science and Engineering
- Nanyang Technological University
- 639798 Singapore
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46
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Wu H, Geng J, Wang Y, Wang Y, Peng Z, Zheng G. Bias-free, solar-charged electric double-layer capacitors. NANOSCALE 2014; 6:15316-15320. [PMID: 25384600 DOI: 10.1039/c4nr05628k] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The conversion of solar energy with simultaneous electric energy storage provides a promising means for optimizing energy utilization efficiency and reducing device volume. In this paper, a 3-dimensional mesoporous carbon coated branched TiO2 nanowire composite is rationally designed for direct conversion and storage of solar energy as electric double-layer capacitive energy. The 1-dimensional, crystalline TiO2 trunks serve as long light absorption and continuous charge transport pathways, and the high-density TiO2 branches can efficiently increase the contact area with the surface coated mesoporous carbon layers. In addition, the ordered and uniformed mesopores provide large pore sizes for electrolyte penetration, and a high surface area for charge absorption and storage. Under a 1-sun illumination and no external electric bias, this branched TiO2/mesoporous carbon composite exhibits specific capacitances of over 30 and 23.4 F g(-1), at current densities of 0.1 and 0.5 A g(-1), respectively. An excellent stability of >50 photocharging-electrical discharging cycles has also been demonstrated, suggesting the potential of further developing this hybrid material structure for simultaneous solar conversion and electric energy storage.
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Affiliation(s)
- Hao Wu
- Laboratory of Advanced Materials, Department of Chemistry, Fudan University, Shanghai, 200433, China.
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47
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Hierarchical assembly of BiOCl nanosheets onto bicrystalline TiO2 nanofiber: Enhanced photocatalytic activity based on photoinduced interfacial charge transfer. J Colloid Interface Sci 2014; 435:26-33. [DOI: 10.1016/j.jcis.2014.08.022] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2014] [Revised: 08/09/2014] [Accepted: 08/11/2014] [Indexed: 11/22/2022]
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48
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Correa Baena JP, Agrios AG. Transparent conducting aerogels of antimony-doped tin oxide. ACS APPLIED MATERIALS & INTERFACES 2014; 6:19127-19134. [PMID: 25296169 DOI: 10.1021/am505115x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Bulk antimony-doped tin oxide aerogels are prepared by epoxide-initiated sol-gel processing. Tin and antimony precursors are dissolved in ethanol and water, respectively, and propylene oxide is added to cause rapid gelation of the sol, which is then dried supercritically. The Sb:Sn precursor mole ratio is varied from 0 to 30% to optimize the material conductivity and absorbance. The materials are characterized by electron microscopy, transmission electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy (XPS), nitrogen physisorption analysis, a four-point probe resistivity measurement, and UV-vis diffuse reflectance spectroscopy. The samples possess morphology typical of aerogels without significant change with the amount of doping. Calcination at 450 °C produces a cassiterite crystal structure in all aerogel samples. Introduction of Sb at 15% in the precursor (7.6% Sb by XPS) yields a resistivity more than 3 orders of magnitude lower than an undoped SnO2 aerogel. Calcination at 800 °C reduces the resistivity by an additional 2 orders of magnitude to 30 Ω·cm, but results in a significant decrease in surface area and pore volume.
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Affiliation(s)
- Juan Pablo Correa Baena
- Civil and Environmental Engineering and ‡Center for Clean Energy Engineering, University of Connecticut , Storrs, Connecticut 06269, United States
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Wu WQ, Feng HL, Rao HS, Kuang DB, Su CY. Rational surface engineering of anatase titania core-shell nanowire arrays: full-solution processed synthesis and remarkable photovoltaic performance. ACS APPLIED MATERIALS & INTERFACES 2014; 6:19100-19108. [PMID: 25314612 DOI: 10.1021/am505044k] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The high-performance of a well-aligned 1D nanostructured electrode relies largely on a smart and rational modification with other active nanomaterials. Herein, we present a facile solution-based route to fabricate a well-aligned metal oxide-based core-shell hybrid arrays on TCO substrate. Demonstrated samples included nanowire@nanoparticle (TNW@NP) or nanowire@nanosheet (TNW@NS) with a unique porous core/shell nanowire arrays architecture in the absence or presence of DETA during the solvothermal treatment process. The "alcoholysis" and "ripening" growth mechanism is proposed to explain the formation of honeycomb-like nanosheets shell on nanowires core. Based on careful control of experimental condition, a novel double layered TiO2 photoanode (DL-TNW@NS-YSHTSs) consisting of 16 μm thick TNW@NS under layer and 6 μm thick yolk-shell hierarchical TiO2 microspheres (YSHTSs) top layer can be obtained, exhibiting an impressive PCE over 10% at 100 mW cm(-2), which can be attributed to the well-organized photoanode composed of hierarchical core-shell arrays architecture and yolk-shell hollow spheres architecture with synergistic effects of high dye loading and superior light scattering for prominent light harvesting efficiency.
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Affiliation(s)
- Wu-Qiang Wu
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, KLGHEI of Environment and Energy Chemistry, Lehn Institute of Functional Materials, State Key Laboratory of Optoelectronic Materials and Technologies, School of Chemistry and Chemical Engineering, Sun Yat-sen University , Guangzhou 510275, P. R. China
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50
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Zhang L, Lin CY, Valev VK, Reisner E, Steiner U, Baumberg JJ. Plasmonic enhancement in BiVO4 photonic crystals for efficient water splitting. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2014; 10:3970-8. [PMID: 24916174 PMCID: PMC4510818 DOI: 10.1002/smll.201400970] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2014] [Revised: 05/12/2014] [Indexed: 05/23/2023]
Abstract
Photo-electrochemical water splitting is a very promising and environmentally friendly route for the conversion of solar energy into hydrogen. However, the solar-to-H2 conversion efficiency is still very low due to rapid bulk recombination of charge carriers. Here, a photonic nano-architecture is developed to improve charge carrier generation and separation by manipulating and confining light absorption in a visible-light-active photoanode constructed from BiVO4 photonic crystal and plasmonic nanostructures. Synergistic effects of photonic crystal stop bands and plasmonic absorption are observed to operate in this photonic nanostructure. Within the scaffold of an inverse opal photonic crystal, the surface plasmon resonance is significantly enhanced by the photonic Bragg resonance. Nanophotonic photoanodes show AM 1.5 photocurrent densities of 3.1 ± 0.1 mA cm(-2) at 1.23 V versus RHE, which is among the highest for oxide-based photoanodes and over 4 times higher than the unstructured planar photoanode.
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Affiliation(s)
- Liwu Zhang
- Cavendish Laboratory, Department of Physics, University of CambridgeCambridge, CB3 0HE, UK E-mail: ;
| | - Chia-Yu Lin
- Department of Chemistry, University of CambridgeCambridge, CB2 1EW, UK E-mail:
| | - Ventsislav K Valev
- Cavendish Laboratory, Department of Physics, University of CambridgeCambridge, CB3 0HE, UK E-mail: ;
| | - Erwin Reisner
- Department of Chemistry, University of CambridgeCambridge, CB2 1EW, UK E-mail:
| | - Ullrich Steiner
- Cavendish Laboratory, Department of Physics, University of CambridgeCambridge, CB3 0HE, UK E-mail: ;
| | - Jeremy J Baumberg
- Cavendish Laboratory, Department of Physics, University of CambridgeCambridge, CB3 0HE, UK E-mail: ;
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