JOURNAL OF CATALYSIS
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2019
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IF 7.723
Yixuan Gao,Shihao Zhang,Yishi Wu,Yang Tian,Hongbing Fu,Sihui Zhan
Photoelectrochemical (PEC) water splitting via semiconductors is an effective and feasible method for synthesizing renewable hydrogen (H 2 ) fuels. In this study, β-In 2 S 3 nanosheets were first grown on conductive glass. Then, we prepared P-doped β-In 2 S 3 nanosheets with an amorphous InPO x overlayer via the incomplete phosphorization of pristine β-In 2 S 3 nanosheets. When we used this material as photoanode in a PEC cell for water splitting, the photocurrent density drastically increased to 2.2 mA cm −2 at 1.23 V versus a reversible hydrogen electrode (vs. RHE). It enhanced 15 times as the pristine β-In 2 S 3 nanosheets, which was only 0.15 mA cm −2 at 1.23 V vs. RHE (solar standard spectrum, 100 mW cm −2 ). The photoelectric conversion efficiency as high as 0.65% at a low potential of 0.81 V vs. RHE was achieved for the phosphorized β-In 2 S 3 nanosheets. A series of experiments proved that the P-doping accelerated semiconductor charge-transport and the InPO x overlayer played cocatalyst role. We penetratingly investigated the pathway of charge transfer via femtosecond transient absorption. The results showed one pathway of charge transfer in pristine β-In 2 S 3 photoanode. However, there were two pathways (core/shell coupling and shallow trap states) for charge transfer in the phosphorized β-In 2 S 3 photoanode, which improved the performance of its PEC water oxidation.
研究领域:
材料科学
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能源科学
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产品关联
DOI
高影响因子
ACS Applied Electronic Materials
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2024
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IF 4.3
Zhou Sheng,Gaoyu Chen,Xueyan Hu,Yue Chen,Dongdong Xu,Caojin Yuan,Xiangxing Xu
The circularly polarized state of light can carry encoding information through polarization modulation and structural information from the emitter or propagation medium. Therefore, the detection of the polarization state of light is a central function in various applications. One of the concise strategies is to transform left- and right-handed circularly polarized light (CPL) directly into distinguishable electronic signals using chiral structured materials. In this study, chiral films of β-In2S3 vertical nanosheet arrays are successfully grown using a facile solvothermal route. Chirality originates from the distortion of nanosheets with left or right-handedness controlled by the introduction of l-/d-cysteine as chiral inducers. Circularly polarized photodetectors based on chiral β-In2S3 films are fabricated. They exhibit good performances with a responsivity (R) of 8.0 A/W, photodetectivity (D*) of 5.0 × 1012 Jones, the photocurrent dissymmetry factor (gIph) of 0.34, and external quantum efficiency (EQE) of 2.2 × 103 (%) for a CPL of 450 nm.
研究领域:
材料科学
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光学工程
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纳米技术
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2019
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IF 5.107
Jingjing Xu,Chen Liu,Junfeng Niu,Mindong Chen
In this work, one kind of novel visible light responsive photocatalysts, In 2 S 3 decorated KNbO 3 nanocubes (KNOIS), were successfully synthesized through a facile in-situ growth method. The performance of the obtained nanocomposites was studied by photocatalytic degradation of tetracycline hydrochloride (TC) and Rhodamine B (RhB) under the irradiation of visible light. Results illustrated that the KNOIS nanocomposites had much higher performance than pure In 2 S 3 and KNbO 3 . The influence of In 2 S 3 amount on the performance of the composites was also studied. Results showed that KNOIS-10 nanocomposite exhibited the best photocatalytic efficiency for TC and RhB degradation. In the degradation of RhB, the apparent rate constant of KNOIS-10 was 0.044 min −1 , which was about 22 and 11 times as that of pure KNO (0.0020 min −1 ) and In 2 S 3 (0.0040 min −1 ), respectively. The trapping experiments suggested that hydroxyl radicals and holes were two main species for the photocatalytic degradation of RhB by KNOIS. Furthermore, the mechanism on the photocatalytic activity enhancement was proposed relied on the experiments and characterization results. The formed p-n heterojunction enhanced the separation efficiency of photo-induced charges. This work would provide a good example for the preparation of niobate based composite photocatalysts with high photocatalytic activity for environmental remediation.
研究领域:
材料科学
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环境科学
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光催化技术
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DOI
高影响因子
ADVANCED MATERIALS
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2025
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IF 26.8
Zailun Liu,Yunfei Ma,Junqing Li,Ying Tu,Hui Yang,Kelin He,Chao Chen,Yulin Wang,Xiang Lin,Hongli Sun,Chenliang Su,Qitao Zhang
Uncovering the excitation processes of photocatalysts and enhancing the dissociation of excitons into free photogenerated electrons and holes for photocatalytic CO 2 reduction is imperative yet quite challenging. Herein, an efficient strategy of reducing the binding energy of excitons to boost exciton dissociation is reported by anchoring the low valence single-atom Cu sites in In 2 S 3 nanosheets (Cu-In 2 S 3 ), which can enhance photocatalytic CO 2 reduction activity. The investigations of photo-irradiated Kelvin probe force microscopy (KPFM), in situ irradiates X-ray photoelectron spectroscopy (XPS), and temperature-dependent photoluminescence (TD-PL) indicate that the doping of low valence single-atom Cu can efficiently drive the charge transfer and separation. Moreover, the studies of the dynamic behaviors of charge carriers by femtosecond time-resolved spectroscopy (fs-TAS) reveal that the doping of low valence Cu single-atom sites allows the promotion of exciton dissociation by reducing the binding energy of the exciton, resulting in an enhanced photocatalytic CO 2 reduction of Cu-In 2 S 3 nanosheets. The aforementioned strategy for enhancing the dissociation efficiency of excitons in photocatalysts will offer a highly efficient and promising approach for the photocatalytic CO 2 reduction and other photocatalytic applications.
研究领域:
光催化
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材料科学
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纳米技术
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物理化学
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能量转换
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产品关联
DOI
PubMed
高影响因子
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