APPLIED SURFACE SCIENCE
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2021
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IF 6.707
Yue Xi,Hao-Qiang Feng,Yi-Ke Li,Qun-Zeng Huang
Modification with co-catalyst has been regarded as an effective strategy to improve the photocatalytic H 2 evolution activity of Mn x Cd 1−x S. Herein, cauliflower-like Mn x Cd 1−x S decorated with Ni 2 P nanoparticles has been prepared via solvothermal method. Experiment results confirmed that modification with Ni 2 P could promote charge transfer efficiency and boost surface reaction rate of Mn x Cd 1−x S. The superior activity of 14.20 mmol g −1 h −1 was obtained over the 3 wt% Ni 2 P/Mn 0.2 Cd 0.8 S composite, which was approximately an 8.3-fold enhancement over pure Mn 0.2 Cd 0.8 S. Furthermore, the activity over Mn 0.2 Cd 0.8 S modified with Ni 2 P was higher than other Ni-based co-catalysts (Ni, Ni 2 S, Ni(OH) 2 , NiB and NiSe 2 ) modification. This work offers a new perspective to design highly efficient photocatalytic system towards H 2 evolution.
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
CHINESE JOURNAL OF STRUCTURAL CHEMISTRY
·
2023
·
IF 2.2
Yuxin Sun,Ye Li,Jiajia He,Liuyun Chen,Hongbing Ji,Zuzeng Qin,Tongming Su
Ternary sulfide solid solutions have garnered great attention in photocatalytic water splitting due to their tunable electronic property, low cost, and sufficient light-absorption performance. Herein, a series of Mn x Cd 1 – x S samples with different Mn/Cd molar ratios were synthesized by solvothermal method and used for photocatalytic hydrogen production under visible light. The Mn 0.2 Cd 0.8 S and Mn 0.4 Cd 0.6 S are demonstrated to be the solid solutions, while Mn 0.6 Cd 0.4 S and Mn 0.8 Cd 0.2 S consist of Mn x Cd 1 – x S solid solution and MnS. In addition, the Mn 0.4 Cd 0.6 S exhibits the highest photocatalytic performance with the H 2 production rate of 185.95 μmol·h −1 , which is 4.7 times higher than that of CdS. Without cocatalyst, the quantum efficiency of Mn 0.4 Cd 0.6 S reaches 2.04% at 400 nm. In addition, the Mn 0.4 Cd 0.6 S solid solution also shows high stability during the photocatalytic H 2 production reaction. The effect of Mn/Cd molar ratio on the microstructure, band gap structure, and photocatalytic hydrogen production performance of Mn x Cd 1– x S was revealed systematically. The excellent photocatalytic H 2 production performance of Mn 0.4 Cd 0.6 S solid solution is mainly due to its enhanced reducing potential and high charge separation efficiency.
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
Journal of Materials Chemistry A
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2018
·Vol. 6
·期 46
·23683-23689
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IF 9.931
Ling Li,Guoning Liu,Shaopeng Qi,Xindi Liu,Liuyu Gu,Yongbing Lou,Jinxi Chen,Yixin Zhao
In this study, a series of MnxCd1−xS nanorods solid solutions featuring precisely controlled band gap and suitable conduction band position were fabricated for the first time with a hot-injection synthesis under N2 atmosphere. Correspondingly, the colloidal Mn0.5Cd0.5S solid solution exhibited the highest photocatalytic H2 generation rate of 26 000 μmol g−1 h−1 and the apparent quantum efficiency of 30.3% at 400 nm, which is approximately 216 times higher than that of pristine h-CdS and 565 times higher than that of γ-MnS alone. Moreover, the MnxCd1−xS solid solution showed good photocatalytic stability because of a proper conduction band position and high crystallinity. This work demonstrates that this hot-injection strategy for developing highly efficient MnxCd1−xS solid solution is promising for preparing other binary or multicomponent solid solutions for a variety of photocatalytic applications.
研究领域:
材料科学
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能源化学
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纳米技术
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DOI
高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
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2016
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IF 2.264
Jiasheng Lai,YiMing Qin,Lan Yu,Chunyan Zhang
A series of Mn x Cd 1−x S (MCS) solid solutions hollow spheres (x=0.0, 0.20, 0.33, 0.50 and 0.67) have been synthesized with the assistance of l -Glutathione (GSH) by a simple hydrothermal route for the first time. Different characterization techniques, including X-Ray diffraction (XRD), atomic absorption spectroscopy (AAS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Brunauer-Emmett-Teller surface area (BET), UV–vis and diffuse reflectance spectra (DRS) are performed to investigate the structural and optical properties of the as-prepared samples. The experiment of rhodamine B (RhB) decoloration indicates that all the MCS samples show higher photo-catalytic activities than commercial CdS under visible light irradiation. Among them, the Mn 0.33 Cd 0.67 S exhibits the highest photo-catalytic activity. The superior photo-catalytic activity of MCS samples may be attributed predominantly to the synergistic effect of the appropriate band-gap structure as well as the special hollow spherical morphology which makes MCS samples have the ability to harvest exciting visible-light due to multiple scattering within the interior space. Furthermore, the Mn 0.33 Cd 0.67 S shows well stability, the photo-catalytic activities do not decrease significantly after six recycles. The work may open a novel strategy to fabricate multi-component chalcogenide solid solutions hollow spheres.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2023
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IF 9.9
Yuqi Liu,Fuyan Kang,Chunyu Bi,Junming Shi,Guoyang Gao,Yulong An,Zhanhua Huang
The simultaneous reforming of biomass into high value-added chemicals and H 2 production by water splitting in a green and environmentally clean way is a very challenging task. Herein, we demonstrate the design of bifunctional Mn x Cd 1-x S photocatalyst with a controllable band gap by bandgap engineering. Bandgap engineering effectively regulates the oxidation and reduction capacity of materials. The design of photocatalysts with suitable conduction bands and valence bands makes the targeted conversion of xylose possible. Innovative conversion of xylose to glyceric acid, lactic acid, and propanoic acid. The optimized Mn 0.7 Cd 0.3 S catalyst showed excellent performance in the production of H 2 (14.06 mmol·g cat -1 ·h −1 , 29.9 times more than CdS and 351.5 times more than MnS), xylose conversion (90%), and C3 organic acid yield (59.2%) without cocatalyst and any scavengers under visible light irradiation. This work shows that a rational photocatalyst design can achieve efficient simultaneous production of high value-added chemicals and clean energy.
研究领域:
材料科学
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环境科学
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化学工程
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DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2018
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IF 5.091
Hui Li,Ziqun Wang,Yunhui He,Sugang Meng,Yun Xu,Shifu Chen,Xianliang Fu
Rational synthesis of photocatalytic materials is an effective way to improve their performance. In this work, to optimize the S precursors, a series of Mn x Cd 1−x S (MCS) were first hydrothermally synthesized with the prevalent thiourea (TA), thioacetamide (TAA) and L-cysteine (L-Cys) as the S sources. The optimum feed ratio of Mn/Cd was then determined based on the optimized S precursor. The effects of S precursors and the feed ratio of Mn/Cd on the phase structure, absorption, morphology, band structure, and the photocatalytic hydrogen evolution reaction (HER) performance of MCS were investigated systematically. The hexagonal phase structures of MnS, CdS, and MCS are favored by TA and L-Cys as the S sources, while their cubic phases are benefited by TAA. TAA is the preferred S source for the preparation of highly active MCS and the solid solution is formed through the consolidation of cubic α-MnS into cubic CdS. The activity of MCS can be improved with the increase of Mn content from x = 0–0.6. The sample with x = 0.6 shows the highest HER activity (2253 μmol·h −1 ·g −1 ) and the performance is almost 6 times higher than CdS (416 μmol·h −1 ·g −1 ). The enhanced activity can be attributed to the improved separation efficiency of photo-induced charge carriers and the negative-shifts of E cb , which are induced by the introduction of Mn. A segregation of inert α−MnS from MCS is occurred when Mn content is >0.6, resulting in a decay of the HER activity. A change of the semiconductivity from n-type to bipolar type is occurred in MCS due to the uneven sulfidation of Mn in MCS.
研究领域:
材料科学
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光催化
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DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2025
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IF 8.3
Jintao Jiang,Qisong Shi,Shurui Yin,Xueting Lv,Xiang Li,Qi Wang,Chuantao Wang,Jun Wan,Chunming Yang
Photocatalytic water splitting for hydrogen production is an ideal green and energy-efficient strategy. However, due to severe recombination of photogenerated electron-hole pairs, and sluggish kinetics of the hydrogen evolution reaction (HER) on the catalyst surface, the current photocatalytic hydrogen production efficiency still fails to achieve satisfactory results. Therefore, in this study, a two-dimensional/two-dimensional (2D/2D) heterojunction BPM (BP/Mn x Cd 1-x S) was constructed via electrostatic self-assembly. The prepared 1 % BPM exhibited excellent photocatalytic hydrogen production performance (55.8 mmol g −1 h −1 ), demonstrating a two-fold improvement in hydrogen evolution performance compared to the MCS-7 solid solution. Comparative analysis of results from multiple characterization techniques revealed that the high-efficiency photocatalytic hydrogen production performance of BPM originates from the introduction of black phosphorus (BP) and the formation of the 2D/2D heterojunction: BP acts as a co-catalyst to inhibit the recombination of photogenerated electrons, while the heterojunction structure effectively separates charges, enabling efficient generation and utilization of photogenerated carriers. This study clarifies the role of BPM in photocatalytic water splitting, aiming to achieve efficient photocatalytic hydrogen production.
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DOI
高影响因子
ACS Catalysis
·
2025
·
IF 13.1
Yufeng Li,Songqing Zhang,Chunmei He,Hongxia Yao,Changfa Guo,Wentao Wang,Yong Hu
Transition-metal (TM)/carbon nanocomposites have emerged as a type of low-cost high-efficiency photocatalysis cocatalyst for their high photoactivity comparable to typical noble metals such as Pt. However, the underlying cocatalytic mechanism in this combined nanoscaled system has not been understood sufficiently. In this work, a core–shell nanoparticle (NP) cocatalyst has been designed and synthesized by using three kinds of large-work-function TMs (Co, Ni, and Cu) and nitrogen-doped carbon (NC) to construct a core–shell structure (TM@NC), and its photocatalytic hydrogen evolution performance has been studied with MnxCd1–xS nanorods (NRs). It has been found that the TMs endow the TM@NC NPs with large work functions, which act as efficient electron traps. Significantly, the Schottky barrier height at the interface of TM@NC and MnxCd1–xS can be modulated by the embedded TMs, and therefore the transfer efficiency of the photoelectrons can be adjusted. Thus, the relationships between photoactivity and the Schottky barrier height can be obtained. The NC layer in the TM@NC structure not only protects the embedded TMs from overoxidation but also provides abundant catalytic sites for hydrogen evolution reaction. Meanwhile, the electronic structure of the NC layer can be refined by the embedded TMs as well, favoring the release of hydrogen from its surface. As a result, all the TM@NC NP cocatalysts exhibit comparable cocatalytic activity to optimized Pt NPs, and the Ni@NC sample obviously outperforms Pt. This work highlights the effect of the Schottky barrier in adjusting the photocatalytic activity and provides deep insight into the photoactivity engineering of photocatalysts by incorporating TMs with semiconductor materials.
研究领域:
材料科学
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光催化
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）