Nano Research
·
2017
·Vol. 10
·期 8
·2699-2711
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IF 7.354
Wang Ting,Chai Yuanyuan,Ma Dekun,Chen Wei,Zheng Weiwei,Huang Shaoming
Nanomaterial shapes can have profound effects on material properties, and therefore offer an efficient way to improve the performances of designed materials and devices. The rational fabrication of multidimensional architectures such as one dimensional (1D)–two dimensional (2D) hybrid nanomaterials can integrate the merits of individual components and provide enhanced functionality. However, it is still very challenging to fabricate 1D/2D architectures because of the different growth mechanisms of the nanostructures. Here, we present a new solvent-mediated, surface reaction-driven growth route for synthesis of CdS nanowire (NW)/CdIn 2 S 4 nanosheet (NS) 1D/2D architectures. The as-obtained CdS NW/CdIn 2 S 4 NS structures exhibit much higher visible-light-responsive photocatalytic activities for water splitting than the individual components. The CdS NW/CdIn 2 S 4 NS heterostructure was further fabricated into photoelectrodes, which achieved a considerable photocurrent density of 2.85 mA·cm −2 at 0 V vs. the reversible hydrogen electrode (RHE) without use of any co-catalysts. This represents one of the best results from a CdS-based photoelectrochemical (PEC) cell. Both the multidimensional nature and type II band alignment of the 1D/2D CdS/CdIn 2 S 4 heterostructure contribute to the enhanced photocatalytic and photoelectrochemical activity. The present work not only provides a new strategy for designing multidimensional 1D/2D heterostructures, but also documents the development of highly efficient energy conversion catalysts.
研究领域:
材料科学
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能源科学
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纳米技术
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产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2022
·
IF 3.656
Yiyang Bi,Guangqi Wang,Jiabo Wang,Qun Liu,Yu Zhang
Intrinsic charge carrier recombination, narrow visible light absorption and poor durability restrain the photoactivity for solar-to-H 2 production. Here, noble-metal-free binary co-catalyst Ni 2 P–Ni 2 P 4 O 12 was synthesized by a simple one-step thermal phosphorylation method for enhancing CdS nanowires in visible-light-driven hydrogen generation, where the CdS nanowires are uniformly dispersed on the surface of Ni 2 P–Ni 2 P 4 O 12 through in-situ solvothermal strategy. The photocatalytic hydrogen production rate of 5 wt% Ni 2 P–Ni 2 P 4 O 12 /CdS nanowires can reach 5093 μmol g −1 h −1 using Na 2 S–Na 2 SO 3 as sacrificial agent under the irradiation of visible light (λ > 420 nm), which is about 16 times for CdS nanowires (316 μmol g −1 h −1 ). In the cycling experiments, the composite catalyst shows good stability and the hydrogen production rate remains about 83% of the initial value. The interface structure construction between CdS nanowires and Ni 2 P–Ni 2 P 4 O 12 result in the excellent photocatalytic activity , broaded visible light absorption and stability. Specifically, Ni 2 P–Ni 2 P 4 O 12 can effectively promote the separation of electron hole pairs in space, in which Ni 2 P 4 O 12 can accept H + ions and Ni 2 P can reduce the over potential of H + reduction, resulting in the synergically promotion in the photocatalytic activity. The cost-effective ternary photocatalyst exhibits great potential for sustainable and high-efficiency photocatalytic water splitting, and Ni 2 P–Ni 2 P 4 O 12 may be suitable to modify a wider variety of semiconductor photocatalysts.
研究领域:
材料科学
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能源化学
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DOI
高影响因子
ENERGY & FUELS
·
2023
·
IF 5.3
Yanfei Zhao,Qi Wang,Congrong Lu,Kuankuan Ren,Shiyan Liu,Chunhe Li,Wei-Dong Dou
The development of photocatalysts with high charge separation efficiency and visible-light-harvesting capacity is still a great challenge. In this work, we report a simple hydrothermal treatment to decorate the CdS nanowires (NWs) with co-catalyst Cu2MoS4 nanosheets (NSs) for photocatalytic H2 evolution reaction (HER). Especially when the molar ratio of Cu2MoS4 to CdS is 3%, the Cu2MoS4/CdS shows excellent visible light-driven H2 evolution activity (1967.83 μmol g–1 h–1), which is 18.8 times higher than that of pure CdS. Structural characterizations demonstrate a well-designed structure of the Cu2MoS4/CdS, in which Cu2MoS4 NSs are tightly attached onto the CdS NWs to form a heterojunction. The optical property reveals that the 3%-Cu2MoS4/CdS nanocomposite displayed distinguished visible-light absorption capacity. Combined with the data analysis of the photoluminescence spectra, photocurrents, and electrochemical impedance spectra, it can be proved that there is effective separation of photogenerated electron–hole pairs in 3%-Cu2MoS4/CdS nanocomposite. All these factors synergistically boost the photocatalytic H2 evolution performance of the Cu2MoS4/CdS, providing a new concept for the rational design of highly efficient visible-light-driven sulfide photocatalysts.
研究领域:
材料科学
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能源化学
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DOI
高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2015
·Vol. 120
·期 4
·1291-1297
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IF 1.704
Wang Xinyu,Ying Yulong,Hu Pan,Lei Jiahuan,Peng Xinsheng
CdS nanowires (NWs) are obtained by the sulfurization of Cd(OH) 2 nanowires at room temperature using H 2 S. The CdS NWs with diameter of 2–5 nm exhibit high photocatalytic performance due to the ultrafine size. To further improve the performance, Au nanoparticles (NPs) with different sizes, i.e., 5, 20, 40 and 100 nm, that decorated the CdS NWs are synthesized through a simple self-assembly and solid sulfuration process. The synthesized Au NPs–CdS NWs hybrids show higher photocatalytic efficiency than that of pure CdS NWs. Furthermore, 20 nm Au NPs–CdS NWs hybrids with an optimal Au loading of 3.2 wt% exhibit the highest photocatalytic efficiency. Both the enhanced separation of photoinduced hole–electron pairs and the absorption of visible light by incorporating Au NPs significantly improve the photocatalytic performance.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Sujuan Li,Haoqi Wu,Yuhang Sang,Bingtao Wang
Graphene@CdS nanowires (GP@CdS NWs) was synthesized by electrostatic assembly and hydrothermal method, and then decorated with CuO nanoparticles via electrodeposition on substrate of glassy carbon electrode to conctruct a photoelectrochemical enzyme-free glucose sensor. Scanning electron microscopy, electrochemical impedance spectroscopy and cyclic voltammetry were used to characterize the morphology and electrochemical properties of the above ternary CuO/GP@CdS NWs nanocomposites. The integration of photosensitive material GP@CdS NWs with electrocatalytic materials of CuO makes the nanocomposites show prominent photoelectrocatalytic activity toward glucose oxidation in alkaline solution. A 2.45 times increase in sensitivity under visible light irradiation was observed compared to dark condition. As a photoelectrochemical platform for non- enzymatic glucose sensing, the CuO/GP@CdS NWs modified electrode exhibited advantages, such as high detection sensitivity, wide linear concentration range, low detection limit and acceptable antiinterference ability. Good recovery obtained for glucose analysis in human serum sample suggested the validity of the proposed method for real sample analysis.
研究领域:
生物传感
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材料科学
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分析化学
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Yuehu Wan,Shiwen Du,Congrong Lu,Kuankuan Ren,Biyun Shi,Shiyan Liu,Chunhe Li,Weidong Dou,Ping Fang,Na Ye
Visible-light-driven photocatalysis holds a broad prospect for alleviating the energy crises. Here we report novel CuS nanoparticles/CdS nanowires Schottky heterojunctions via a two-step hydrothermal synthesis and used for photocatalytic H 2 generation driven by visible-light (λ ≥ 420 nm). Compared with pure CdS NWs, the CuS/CdS nanocomposites show outstanding visible light H 2 evolution, with an optimal rate reaching 2076.5 μmol h −1 g −1 . The intrinsic properties of CuS/CdS nanocomposites, such as structure, optical properties , and combined configuration are systematically analyzed by experimental characterizations and theoretical calculations. The comprehensive results show that the Schottky junction between CuS NPs and CdS NWs accelerates photoinduced electron drift from semi-conductive CdS to metallic CuS, improving their activities of water splitting. This work offers a simple route to synthesize one-dimensional CdS-based nanocomposites for efficient visible-light driven energy conversion.
研究领域:
材料科学
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能源科学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2023
·
IF 15.1
Lixiang Zhang,Luping Feng,Xiao Zhuang,Peisong Tang,Guofu Chen,Hua Wang
A visible-light-responsive photoelectrochemical (PEC) sensor was proposed for the sensitive and selective analysis of chlorpyrifos (CPF) by synergistically using CoS 2 quantum dots (QDs) and CdS nanowires (NWs). The CdS NWs were first prepared by the solvothermal method and subsequently combined with CoS 2 QDs to produce CoS 2 /CdS product with 0D/1D heterostructure. It turned out that the so-obtained nanocomposites with 0D/1D heterostructure could greatly suppress the recombination of photoinduced electrons and holes, and the electrode modified with this composite could exhibit preferable PEC performance and photocurrent signal compared to the one with CdS or CoS 2 . After the addition of CPF, the photocurrent signal of the proposed PEC sensor was found to be selectively decreased because of the specific chelation between the cobalt sites of CoS 2 /CdS and the sulfur, nitrogen-atoms of CPF, which might block the electrons transferring process. The proposed PEC sensor could detect CPF in concentrations that linearly span from 0.030 to 100 ppb with an ideal detection limit of 0.010 ppb, which performances are much better than those of currently used analytical methods. Furthermore, this work may establish a framework for the development of various PEC sensing platforms with 0D/1D heterostructure for the quantitative assay of environmental pollutants like CPF.
研究领域:
环境科学
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分析化学
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产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2021
·Vol. 9
·期 24
·13996-14003
·
IF 12.732
Hongqiang Jin,Yu Yu,Qikai Shen,Peipei Li,Jia Yu,Weiming Chen,Xin Wang,Zhuo Kang,Lei Zhu,Runqing Zhao,Lirong Zheng,Weiguo Song,Changyan Cao
1T-phase molybdenum disulphide (MoS2) is considered to be one of the most promising candidates to substitute noble metals in the hydrogen evolution reaction (HER). Fabricating single layer 1T-phase MoS2 with abundant sulfur vacancies as well as good stability to further enhance catalytic performance remains a challenge. Herein, we develop an efficient in situ TMA cation ((CH3)4N+) intercalation method to produce 1T-phase MoS2. The obtained MoS2 nanosheets comprise about 81% 1T-phase and abundant sulfur vacancies (>12%), as verified by aberration-corrected high-angle annular dark field scanning transmission electron microscopy (AC-HAADF-STEM), X-ray photoelectron spectroscopy (XPS), X-ray absorption fine structure (XAFS), etc. In addition, the surface of as-prepared ST-MoS2 is negatively charged, making it very stable in aqueous solution. The as-prepared ST-MoS2 exhibits excellent electrochemical HER performance with a low over-potential and a small Tafel slope as well as superior cycling stability. Furthermore, it is an excellent co-catalyst when coupled with CdS nanowires to form a CdS/ST-MoS2 heterojunction photocatalyst for the HER under visible light irradiation. It achieves a maximum H2 production rate and apparent quantum efficiency (AQE) of approximately 1187 μmol mg−1 h−1 and 73.4%, respectively, which are significantly higher than those of reported CdS/MoS2 photocatalysts.
研究领域:
材料科学
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纳米技术
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电化学
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催化
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能量转换
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DOI
高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
·
2020
·Vol. 22
·期 4
·1-14
·
IF 2.132
Cao Xinjiang,Guo Weiyun,Li Anhua,Du Juan,Du Lei,Zhang Guangjie,Liu Hui
Developing a high-efficient, low-cost visible-light-responsive photocatalyst is still a challenge in environmental remediation. Here, a three-dimensional (3D) porous architecture named reduced graphene oxide/CdS nanowire (RGO/CdS) aerogel was constructed by a facile two-step approach through coupling graphene with one-dimensional CdS nanowires (CdS NWs). A variety of characterization methods displayed that the resultant RGO/CdS aerogels were embedded with large amounts of CdS NWs with an average length and width of ∼ 2.9 μm and ∼ 60 nm, respectively, which would maximize the specific surface area that in turn markedly facilitate the transportation of photogenerated charge carriers and strong adsorption of organic pollutants. Moreover, the visible-light photocatalytic experiments demonstrated that the RGO/CdS aerogel exhibited a higher degradation rate (96.6%) for methylene blue (MB) degradation compared with that of bare CdS NWs or pure RGO xerogel. In this proposed study, a photocatalytic mechanism indicates that the enhanced photocatalytic activity of the 3D framework might contribute potentially to generate synergetic effect of CdS NWs into the space of graphene sheets.
研究领域:
材料科学
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环境科学
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纳米技术
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Luping Feng,Lixiang Zhang,Xi Chen,Chunxian Zhang,Guojiang Mao,Hua Wang
An ultrasensitive and selective photoelectrochemical (PEC) platform has been developed for determining Hg 2+ with “turn-on” signal output by synergistically using CdS nanowires (NWs) and ZnS quantum dots (QDs). CdS NWs was first prepared and then deposited with ZnS QDs to yield ZnS/CdS nanocomposite with type-II heterostructure. It was found that the as-constructed ZnS/CdS heterostructure can exhibit excellent photoelectrochemical characteristics by separately employing CdS NWs and ZnS QDs as the photosensitizer and Hg 2+ -recognition probe. What's more, the constructed analysis platform could display specifically enhanced photocurrent responses to Hg 2+ under the visible light via the selective ion-exchange reaction. The in-situ formation of ternary HgS/ZnS/CdS could be thus expected with double type-II heterostructures so as to further enhance the transferring and separation of charges. A linear response can be achieved for Hg 2+ in the concentration range from 0.0010 to 5.0 nM, with a detection limit of 0.40 pM. Moreover, the application feasibility of the developed sensor with ZnS/CdS heterostructure could be testified by detecting Hg 2+ ions in environmental waters. Such a route of in-situ formation of double type-II heterostructure might promise the wide applications for designing different visible light-driven PEC sensors for probing heavy metals like Hg 2+ with the “turn-on” signal output.
研究领域:
分析化学
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环境科学
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材料科学
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产品关联
DOI
高影响因子
ChemCatChem
·
2020
·Vol. 13
·期 5
·1355-1361
·
IF 4.853
Fulai Liu,Zhuan Wang,Yuxiang Weng,Rui Shi,Wangjing Ma,Yong Chen
Graphical Photocatalysis : A 0D-1D BPQDs/CdS composite with high-quality interface was prepared by a facile electrostatic self-assembly approach. The optimized H 2 evolution rate of 3 wt % BPQDs/CdS can reach up to 9.9 mmol g −1 h −1 . The enhanced activity is attributed to the rapid transfer of photogenerated electrons from CdS to BPQDs, which is thoroughly demonstrated by time-resolved TAS spectra. Constructing a high-quality interface with strong coupling interaction is highly desirable in composite photocatalysts for the efficient interfacial charge transfer. Herein, we prepared black phosphorus quantum dots/CdS (BPQDs/CdS) binary composites with tight interfacial contact via a facile electrostatic self-assembly approach for efficient photocatalytic H 2 evolution. The optimized H 2 evolution rate of 3 wt % BPQDs/CdS can reach up to 9.9 mmol g −1 h −1 in lactic acid aqueous solution, 99 and 5.5 times greater than that of pristine BPQDs and CdS, respectively. Benefiting from the strong interface interaction between CdS and BPQDs in well-contacted BPQDs/CdS composites, efficient charge separation can be achieved, leading to enhanced photocatalytic H 2 evolution activity. Notably, the rapid transfer of photogenerated electrons from CdS to BPQDs was unambiguously confirmed by time-resolved transient absorption spectroscopy.
研究领域:
材料科学
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纳米技术
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光催化
·
可再生能源
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）