ELECTROCHIMICA ACTA
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2018
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IF 5.116
Yuli Xiong,Lin Yang,Huichao He,Jing Wan,Peng Xiao,Wenlong Guo
The successive ionic layer absorption and reaction (SILAR) method has been successfully used for the thin film preparation of metal oxides. In this work, we firstly fabricate the hybrid Bi 2 MoO 6 @Bi 2 Mo 2 O 9 photoanode by a one-step SILAR method. The optimized Bi 2 MoO 6 @Bi 2 Mo 2 O 9 demonstrates a photocurrent about 0.160 mA cm −2 at 1.23 V vs. RHE, which is 3.6 and 8.0 times enhancement compared with pristine Bi 2 MoO 6 and Bi 2 Mo 2 O 9 for water oxidation . The enhanced efficiencies of charge separation and oxidation kinetics by Bi 2 MoO 6 @Bi 2 Mo 2 O 9 are 20.5% and 54.6% at 1.23 V vs. RHE, which is higher than Bi 2 Mo 2 O 9 (9.2% and 15.4%) and Bi 2 MoO 6 (10.7% and 29.2%). Moreover, the electron transport time of Bi 2 MoO 6 @Bi 2 Mo 2 O 9 is 0.038 ms at 300 W m −2 through the controlled intensity modulated photocurrent spectrometer analysis, which is lower than Bi 2 Mo 2 O 9 (0.087 ms) and Bi 2 MoO 6 (0.052 ms). The enhanced photoelectrochemical activities of Bi 2 MoO 6 @Bi 2 Mo 2 O 9 can be attributed to the matched energy band between Bi 2 Mo 2 O 9 and Bi 2 MoO 6 , which could not only improve the charge separation, but also accelerate the charge migration. Therefore, our research indicates an effective technique for fabricating Bi 2 MoO 6 @Bi 2 Mo 2 O 9 by one step process, and thus may provide a new idea for the preparation of other hybrid ternary metal oxides.
研究领域:
材料科学
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光化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
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2017
·Vol. 53
·期 5
·3682-3691
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IF 2.599
Chang Meng-Jie,Wang Hua,Li Hui-Lu,Liu Jun,Du Hui-Ling
A novel magnetic Fe 2 O 3 /BiOI hybrid nanostructure was fabricated by combining electrospinning and successive ionic layer adsorption and reaction (SILAR) method. Hollow Fe 2 O 3 nanofibers with internal diameter around 50 nm were produced by using electrospinning and calcinations of the as-spun fibers at 450 °C for 2 h. BiOI was deposited on the Fe 2 O 3 nanofiber surface by SILAR method, and the BiOI quantity could be controlled by the growth cycles of SILAR. Similar synthetic procedure could also be used to prepare Fe 2 O 3 /BiOBr and Fe 2 O 3 /BiOCl hybrid nanostructures. The BiOI on the magnetic nanofiber surface is highly crystalline with lamellae morphology of around 16 nm in thickness from the X-ray diffraction and scanning electron microscopy detections. The obtained Fe 2 O 3 /BiOI hybrid nanostructures exhibit superior visible light catalytic performance toward decomposition of RhB. This new method, which can also be used to prepare other magnetic photocatalyst simply at low cost, is suitable for practical applications.
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2018
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IF 3.779
Qingqing Qiu,Yifan Chen,Qiannan Wu,Ping Wang,Dejun Wang,Yanhong Lin,Tengfeng Xie
The inverted type-I CdS-CdSe core-shell structure quantum dots (QDs) (denoted as CdS-CdSe QDs) applied in QDs sensitized solar cells (QDSCs) has attracted wide attention and researches due to its special photoelectric properties. But this post synthesis ligand-assisted (PSLA) technique need to assemble the previously prepared QDs onto the photoanode, leads to the low loadings of QDs and poor photoelectric performances of solar cells. Hence, we elaborately combine the PSLA technique and successive ionic layer absorption and reaction (SILAR) method to assemble the QDs onto the photoanode to improve the loadings of QDs and photoelectric properties of solar cells. The anatase TiO 2 nanowires (NWs) electrode deposited with CdS-CdSe core-shell QDs and CdSe QDs (denoted as CdS-CdSe/CdSe QDs) was successfully prepared by combining the post synthesis ligand-assisted technique and SILAR method. The surface photovoltage (SPV), the transient photovoltage (TPV) and transient photocurrent (TPC) techniques were applied to systematically study the dynamics of charge separation and transfer. These measurements demonstrate that CdS-CdSe/CdSe QDs sensitized TiO 2 NWs photoelectrodes exhibits favorable separation efficiency due to the increase of sunlight utilization. With the polysulfide electrolyte, the maximum photoelectric conversion efficiency (PCE) with the enhanced short circuit current (J sc ) of 17.76 mA/cm −2 for the CdS-CdSe/CdSe QDs and the J sc of 11.4 mA/cm −2 for pure CdS-CdSe QDs were obtained under illumination at 100 mW/cm 2 . To enhance the PCE, the TiO 2 NWs was optimized by N-doped and the optimized PCE of 3.13% with 18.22 mA/cm 2 of J sc was achieved for the QDSCs deposited with CdS-CdSe/CdSe QDs.
研究领域:
材料科学
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能源技术
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光电化学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
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2016
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IF 2.758
Zhang Lan,Wanxia Wu,Sheng Zhang,Lanfang Que,Jihuai Wu
Highly ordered TiO 2 nanotube arrays are synthesized and utilized in preparing front-side illuminated photoelectrodes of CdS quantum-dot-sensitized solar cells (QDSSCs). The CdS quantum dots (QDs) are adsorbed on the ordered TiO 2 nanotube arrays by successive ionic layer adsorption and reaction method (SILAR). Taking the advantages of high surface area and large size of ordered pores of the TiO 2 nanotube arrays, the reaction solutions for SILAR processes can easily penetrate into the photoelectrodes; and the formed CdS QDs can be homogeneously dispersed on the TiO 2 nanotube walls with high coverage. In order to improve photovoltaic performance of QDSSCs, the other important components including counterelectrode, polysulfide (S 2− / S x 2 - ) electrolyte, and cycles of SILAR processes for preparing CdS QDs sensitized photoelectrodes are optimized. With thermally treated CuS counterelectrode, pure deionized water based polysulfide (S 2 − / S x 2 - ) electrolyte, and 15 cycles of SILAR processes prepared CdS QDs sensitized photoelectrode, the QDSSC can achieve the highest power conversion efficiency about 3.22% under full sunlight illumination (100 mW cm −2 , AM 1.5G), which is a comparative value among the pure CdS QDs sensitized solar cells.
研究领域:
材料科学
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纳米技术
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能源研究
✓ 已验证
产品关联
DOI
高影响因子
OPTICS COMMUNICATIONS
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2015
·
IF 1.449
Yibing Lin,Yu Lin,Yongming Meng,Yongguang Tu,Xiaolong Zhang
SnO 2 nanoparticles were synthesized by hydrothermal method and applied to photo-electrodes of quantum dots-sensitized solar cells (QDSSCs). After sensitizing SnO 2 films via CdS quantum dots , CdSe quantum dots was decorated on the surface of CdS/SnO 2 photo-electrodes to further improve the power conversion efficiency. CdS and CdSe quantum dots were deposited by successive ionic layer absorption and reaction method (SILAR) and chemical bath deposition method (CBD) respectively. Scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray diffraction (XRD) were used to identify the surface profile and crystal structure of SnO 2 photo-electrodes before and after deposited quantum dots. After CdSe co-sensitized process, an overall power conversion efficiency of 1.78% was obtained in CdSe/CdS/SnO 2 QDSSC, which showed 66.4% improvement than that of CdS/SnO 2 QDSSC.
研究领域:
材料科学
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能源技术
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2016
·
IF 3.15
Fengyu Tian,Dongfang Hou,Fuchao Hu,Kui Xie,Xiuqing Qiao,Dongsheng Li
1D porous CdS nanoparticles/TiO 2 nanofibers heterostructure has been fabricated via simple electrospinning and a successive ionic layer adsorption and reaction (SILAR) process. The morphology, composition, and optical properties of the resulting CdS/TiO 2 heterostructures can be rationally tailored through changing the SILAR cycles. The photocatalytic hydrogen evolution and decomposition of rhodamine B (RhB) of the as-synthesized heterostructured photocatalysts were investigated under visible light irradiation. Compared to TiO 2 nanofibers，the as-obtained CdS/TiO 2 heterostructures exhibit enhanced photocatalytic activity for hydrogen production and decomposition of RhB under visible-light irradiation. The heterojunction system performs best with H 2 generation rates of 678.61 μmol h −1 g −1 under visible light irradiation which benefits from the two effects: (a) the 1D porous nanofibrous morphology contributes to not only more active sites but also more efficient transfer of the photogenerated charges (b) the synergetic effect of heterojunction and photosensitization reducing the recombination of photogenerated electrons and holes.
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Analytical Methods
·
2021
·Vol. 13
·期 15
·1803-1809
·
IF 2.896
Mingqing Li,Li Li,Boya Li,Liying Zhai,Baohui Wang
The design and construction of a photoelectrochemical (PEC) sensor with excellent photoelectric properties and good photoelectrocatalysis activity is significant for the effective detection of analytes. In this paper, based on a two-step anodic oxidation method and successive ionic layer adsorption (SILAR) method, a TiO2 nanotube array (TNT) photoelectrochemical sensor modified with BiOBr nanosheets was constructed and applied for the detection of H2O2 for the first time. The photocurrent of the photoelectrochemical sensor increases with the increase of the H2O2 concentration under the irradiation of an 8 W UV lamp. Excellent linearity was obtained in the concentration range from 10 nM to 100 μM with a low detection limit of 5 nM (S/N = 3). This excellent photoelectrochemical performance is due to the formation of a p–n heterojunction between BiOBr and TiO2 nanotube arrays, which provides efficient separation of charge carriers and accelerates electron transport. Moreover, it is applied to detect H2O2 in milk samples and it showed a good recovery result ranging from 95.73% to 105.65%, which provides a promising new strategy for the detection of H2O2.
研究领域:
材料科学
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分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
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2015
·Vol. 17
·期 3
·1-15
·
IF 2.184
Liu Yingbo,Li Zhen,Yu Libo,Sun Shuqing
In this work, the influences of cationic precursors on the quality of photoelectrode, consequently on the performance of the quantum dot-sensitized solar cells (QDSCs) have been studied. CdS QDSCs have been prepared using successive ionic layer absorption and reaction (SILAR) method. Three cadmium precursors including nitrate (Cd(NO 3 ) 2 ), chloride (CdCl 2 ), and acetate (Cd(Ac) 2 ) were employed for the synthesis and absorption of CdS nanoparticles on nanostructure TiO 2 film. The loading amount and nanoparticle size of the CdS on mesoporous TiO 2 film showed a significant difference while using various cadmium precursors in the same SILAR cycles. Both the light-harvesting ability and the obtained incident photon-to-current conversion efficiency values show the trend of deposition rate caused by cadmium precursors. Further, it was proposed that an effective cationic precursor could provide a good connection between QD sensitizer and TiO 2 interface by electrochemical impedance spectroscopy analysis. Under AM 1.5 G full one sun illumination, the final power conversion efficiency of CdS QDSC based on Cd(Ac) 2 was 2.10 %, and PCE values of 1.57 and 1.20 % were obtained for solar cells sensitized by CdS QDs prepared by CdCl 2 and Cd(NO 3 ) 2 , respectively. The cationic precursor effect was further applied in PbS/CdS co-sensitized solar cells. The PbS/CdS QDSCs based on acetate cationic precursors provide a photocurrent of 19.24 mA/cm 2 and PCE of 3.23 % in comparison with 11.26 mA and 2.13 % obtained with nitrate acetate salts. Noticeably, the CdS and PbS/CdS QDSCs based on various cationic precursors prepared by SILAR exhibited good photocurrent stability under several light on–off cycles.
研究领域:
材料科学
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纳米技术
·
能源研究
✓ 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）