FUEL
·
2025
·
IF 7.5
Yunxia Luo,Yongping Luo,Chao Liu,Wenzhen Qin,Yuhua Dai,Yu Xie,Xiu Wang,Jiansheng Zhang
Plumbing and devising photocatalysts for high photocatalytic hydrogen production is still a major challenge. In this study, the NiAl-LDH/Mn 0.5 Cd 0.5 S heterostructure composites are prepared by hydrothermal method. When the loading weight of NiAl-LDH is 20 wt%, NiAl-LDH/Mn 0.5 Cd 0. 5S composites has the excellent ability to separate photogenerated charge carriers under visible light. Meantime, the NiAl-LDH/Mn 0.5 Cd 0.5 S composites possess prominent photocatalytic hydrogen production rates of 55.9 mmol·h −1 ·g −1 , which is 7.5 times of pure Mn 0.5 Cd 0.5 S and 25 times of NiAl-LDH. According to the data, the photocatalytic mechanism of electron-holes movement over NiAl-LDH/Mn 0.5 Cd 0.5 S composites is unlocked. This work offers a reference for designing novel heterojunction for photocatalytic production of H 2 .
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
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Jiashun Zhou,Haifeng Zhu,Renjie Ding,Huihua Luo,Lianqing Yu,Yaping Zhang
The core-shell structure photocatalysts have attracted extensive attention in photocatalysis due to large contact area, multiple reaction sites and high photocatalytic performance. Herein, a series of Mn 0.5 Cd 0.5 S@CuPc nano core-shell composites photocatalyst were successfully synthesized by facile solution method. The results showed that the as-prepared Mn 0.5 Cd 0.5 S photocatalyst hydrogen evolution was only 0.40 mmol/g·h, while Mn 0.5 Cd 0.5 S@CuPc composites show strong light absorption from 600 nm to 800 nm and high catalytic performance compared with pure Mn 0.5 Cd 0.5 S. Notably, the hydrogen evolution of Mn 0.5 Cd 0.5 S @CuPc-5% reached up to 2.14 mmol/(g·h), representing a remarkable 5.35 times improvement compared to the pure Mn 0.5 Cd 0.5 S when the optimal loading capacity of CuPc was set at 5%. The Mn 0.5 Cd 0.5 S@CuPc-5% exhibits excellent photocatalytic performance can be attributed to the CuPc forms a uniform molecular film on the surface of Mn 0.5 Cd 0.5 S, and the close contact between Mn 0.5 Cd 0.5 S and CuPc which can effectively promote the transfer and separation of photo-generated carriers. Moreover, the 5% Mn 0.5 Cd 0.5 S@CuPc nano core-shell composites have excellent stability, photocatalyst hydrogen activity reduce was approximately 20.1% after four runs for 12 h. This nano core-shell structure photocatalyst research offers a new strategy for constructing organic-inorganic nanocomposite 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
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Chenxuan Wang,Xinyi Ma,Zhongyuan Fu,Xiaoyun Hu,Jun Fan,Enzhou Liu
A twinned Mn 0.5 Cd 0.5 S ( T -MCS) homojunction, consisting of wurtzite and zinc-blende Mn 0.5 Cd 0.5 S with different energy band structures, was fabricated using a facile hydrothermal method, resulting in the formation of a type-II bulk phase twinned homojunction. Furthermore, NiCo 2 S 4 nanoparticles were deposited on the surface of T -MCS to form a surface heterojunction. The activities of T -MCS and NiCo 2 S 4 / T -MCS were tested in the photocatalytic H 2 evolution reaction. T -MCS exhibits a superior H 2 evolution rate of 61.4 mmol∙g −1 ∙h −1 under visible light (λ > 420 nm) irradiation owing to faster bulk phase charge separation, which is 8.2 and 1.9 times higher than those of wurtzite and zinc-blende Mn 0.5 Cd 0.5 S, respectively. Moreover, NiCo 2 S 4 can facilitate interfacial electron transfer and can lower the H 2 evolution overpotential; the H 2 evolution rate is boosted to 127.3 mmol∙ g −1 ∙h −1 with an apparent quantum yield (AQY) of 23.4% with irradiation of 2 wt%-NiCo 2 S 4 / T -MCS under 400 ± 7.5 nm light. This work demonstrates that bulk phase twinned homojunctions and a surface heterojunction can combine to promote bulk and interfacial charge transfer and separation, simultaneously improving the kinetics of photocatalytic H 2 evolution.
研究领域:
材料科学
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能源科学
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化学工程
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产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2019
·
IF 14.229
Xinwei Jiang,Haisheng Gong,Qiuwen Liu,Mingxia Song,Caijin Huang
Mn x Cd 1-x S solid solution is an emerging semiconductor for photocatalytic water splitting with a tunable bandgap. However, it still leaves much room to improve the photocatalytic activity. Herein, we modified Mn 0.5 Cd 0.5 S with noble metal-free NiSe by an in-situ hydrothermal synthesis. The as-obtained NiSe/Mn 0.5 Cd 0.5 S nanocomposites exhibited highly efficient photocatalytic H 2 production under visible light and the highest hydrogen generation rate reaches 28.08 mmol/h/g, which is higher than that of Mn 0.5 Cd 0.5 S (13.71 mmol/h/g) and 1 wt% Pt/Mn 0.5 Cd 0.5 S (24.22 mmol/h/g). Through the detailed analyses of UV–vis DRS, photoluminescence (PL) spectra, time-resolved photoluminescence (TRPL) and photoelectrochemical tests, we found the well-matched structure between NiSe and Mn 0.5 Cd 0.5 S, which facilitates the charge transfer and prolongs the lifetime of photo-induced electrons, and thus improves photocatalytic activity.
研究领域:
材料科学
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能源化学
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2022
·
IF 7.139
Haixia Qian,Lihong Cao,Shunde Liao,Shenghui Xie,Xinbo Xiong,Jizhao Zou
Designing cost-effective photocatalysts with remarkable performance is a foresighted strategy to foster the evolution of H 2 in water splitting. In this study, a p-n heterojunction FeWO 4 /Mn 0.5 Cd 0.5 S photocatalyst modified by low-cost and non-toxic FeWO 4 was synthesized using hydrothermal and calcination methods. The hydrogen evolution activity of Mn 0.5 Cd 0.5 S was strengthened by varying the amount of FeWO 4 loading. The hydrogen production rate of FeWO 4 /Mn 0.5 Cd 0.5 S photocatalyst loaded with 10% FeWO 4 can reach 9.63 mmol g −1 h −1 , which is equivalent to 2.16 times of pure Mn 0.5 Cd 0.5 S. The enhancement of the H 2 evolution activity was primarily contributed to a p-n heterojunction formed at the interface of FeWO 4 and Mn 0.5 Cd 0.5 S. It provides a fast pathway for the migration and separation of photogenerated charges and effectively inhibits the photo-corrosion of Mn 0.5 Cd 0.5 S.
研究领域:
材料科学
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能源化学
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Hua Lv,Chayuan Zhou,Qinhui Shen,Yuanfang Kong,Baoliang Wan,Zhiyun Suo,Gongke Wang,Guangtao Wang,Yumin Liu
Developing effective photocatalysts to achieve stable and efficient solar-induced hydrogen production remains a significant challenge due to rapid photocarrier recombination and sluggish hydrogen evolution kinetics. Here, a multi-interfacial engineering strategy involving the decoration of metallic Ni 3 C onto CaTiO 3 /Mn 0.5 Cd 0.5 S was proposed to create an S-scheme/Schottky hybrid heterostructure with multiple carrier transport paths for effective photocatalytic H 2 production. Exploiting the synergy between S-scheme heterojunction and Schottky barrier, the engineered ternary CaTiO 3 /Mn 0.5 Cd 0.5 S/Ni 3 C hybrid heterojunction exhibits outstanding photostability and significantly enhanced hydrogen evolution activity of 79.1 mmol g -1 h −1 , which was about 4.55, 3.22 and 2.59 times greater than Mn 0.5 Cd 0.5 S, Mn 0.5 Cd 0.5 S/Ni 3 C, and CaTiO 3 /Mn 0.5 Cd 0.5 S, respectively. By creating an S-scheme heterojunction between CaTiO 3 and Mn 0.5 Cd 0.5 S, accompanied by a robust internal electric field (IEF), spatial charge separation can be effectively accelerated while ensuring the simultaneous preservation of highly active electrons and holes. Meanwhile, Ni 3 C nanoparticles, acting as a Schottky-junction H 2 generation cocatalyst, can efficiently trap the photoinduced electrons to establish multiple charge transfer channels and supply ample active sites for photoreduction reaction, thereby further optimizing the hydrogen generation kinetics. The integration of a Schottky barrier and S-scheme heterojunction in this research is expected to offer new perspectives for designing other highly effective hybrid catalysts for solar-to-hydrogen fuel conversion.
研究领域:
材料科学
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能源化学
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催化化学
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产品关联
DOI
PubMed
高影响因子
Materials
·
2022
·Vol. 15
·期 17
·5861
·
IF 3.748
Haifeng Zhu,Renjie Ding,Xinle Dou,Jiashun Zhou,Huihua Luo,Lijie Duan,Yaping Zhang,Lianqing Yu
A novel co-catalyst system under visible-light irradiation was constructed using high-purity metal and alloy mesh and a Mn0.5Cd0.5S photocatalyst with a narrow band gap (1.91 eV) prepared by hydrothermal synthesis. The hydrogen production rate of Mn0.5Cd0.5S changed from 2.21 to 6.63 mmol·(g·h)−1with the amount of thioacetamide, which was used as the sulphur source. The introduction of Ag, Mo, Ni, Cu, and Cu–Ni alloy meshes efficiently improved the H2production rate of the co-catalyst system, especially for the Ni mesh. The improvement can reach an approximately six times greater production, with the highest H2production rate being 37.65 mmol·(g·h)−1. The results showed that some bulk non-noble metal meshes can act as good or better than some noble metal nanoparticles deposited on the main photocatalyst for H2evolution due to the promotion of photoinduced electron transfer, increase in redox reaction sites, and prevention of the recombination of carriers.Keywords:co-catalyst system;Mn0.5Cd0.5S;metal and alloy mesh;H2evolution;photoinduced electron transfer
研究领域:
材料科学
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催化化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2020
·
IF 4.939
Xinwei Jiang,Qiang Liu,Chuchu Cheng,FangShu Xing,Cheng Chen,Caijin Huang
Developing a suitable and low-cost co-catalyst is highly desired for promoting photocatalytic water splitting of H 2 production. Herein, we adopted a simple in situ photodeposition strategy by coupling Mn 0.5 Cd 0.5 S with non-noble co-catalyst Ni 2 P to construct Ni 2 P/Mn 0.5 Cd 0.5 S composites and achieved obviously improved H 2 amount (31.83 mmol/h/g) in visible-light region, which is nearly 2.8 times than that of pure Mn 0.5 Cd 0.5 S. Such photocatalytic performance is in a relatively superior position among Mn x Cd 1−x S-based photocatalysts . The apparent quantum efficiency of Ni 2 P/Mn 0.5 Cd 0.5 S-7 composites reaches 32% at 420 nm. Through optical and photoelectrochemical measurements, a possible mechanism was proposed, it was found that the interface between metalloid Ni 2 P and Mn 0.5 Cd 0.5 S contacts closely, which facilitates transfer and separation of charge carriers, thus promotes the reduction of H + to H 2 . This study provides a new design of cut-price, high-efficiency photocatalyst for H 2 evolution.
研究领域:
材料科学
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能源化学
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Meijuan Ding,Mei Li,Ziyu Li,Jingyi Nie,Xianglong Lyu,Zhiliang Jin
To investigate the hydrogen evolution performance of Mn 0.5 Cd 0.5 S (MCS) under visible light and its degradation effect on tetracycline, this study prepared MCS and CoFe 2 O 4 (CFO) photocatalysts via the hydrothermal method. Specifically, MCS was synthesized using manganese acetate as the Mn source, cadmium acetate as the Cd source, and thioacetamide as the S source, while CFO was prepared using cobalt nitrate and iron nitrate as precursors. The composite material CFO/MCS was fabricated via an ultrasound and calcination method for photocatalytic hydrogen evolution and tetracycline degradation. The results demonstrated that the CFO/MCS-24 % composite exhibited the best catalytic performance. Under a 10 W light source for 5 h, the maximum hydrogen evolution reached 401 μmol, with AQE of 0.15 % at a wavelength of 450 nm. Additionally, CFO/MCS-24 % degraded 88 % of tetracycline within 120 min. Based on XPS spectra analysis, DFT calculations, and the conduction and valence band positions of CFO and MCS, it is speculated that Z-scheme heterojunction is formed between them. The successful preparation of CFO/MCS not only significantly enhanced the catalytic activity of the photocatalyst but also enabled the recycling of the nanocatalyst, providing a valuable reference for the application of composite materials in photocatalysis.
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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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Renjie Ding,Haifeng Zhu,Jiashun Zhou,Huihua Luo,Kehui Xue,Lianqing Yu,Yaping Zhang
Developing highly water-stable zeolitic imidazolate frameworks (ZIFs) for visible-light-driven photocatalytic hydrolysis is important and challenging. Herein, the Type II heterojunction catalyst Mn0.5Cd0.5S@ZIF-8 and its derivatives (including MCS@ZIF-8-Mn, MCS@ZIF-8-Br, and MCS@ZIF-8-MB) were successfully constructed using a facile strategy. Through dual postsynthetic ligand and cation exchange (PSE) treatments of Mn(Ac)2·4H2O and 4-bromo-1H-imidazole for ZIF-8, the hydrogen production efficiency of the MCS@ZIF-8-MB heterojunction catalyst can reach 5.450 mmol·g–1·h–1 and remain at 97.11% after 9 h of the stability test. Construction of heterojunctions can effectively improve the hydrogen production performance of Mn0.5Cd0.5S while maintaining excellent water stability. X-ray photoelectron spectroscopy results show that upon successful construction of the MCS@ZIF-8-MB heterojunction an interface forms between the surface of MCS and ZIF-8-MB, effectively weakening the photocorrosion of MCS. Density functional theory calculations also indicate that the induction of Mn can increase the electronic states of p and d orbitals near the Fermi level of ZIF-8, suggesting that Mn(II) attracts more electrons than Zn(II). This provides more powerful theoretical evidence for the electron cloud shift from the electron donor S2– to Mn2+.
研究领域:
材料科学
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化学工程
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能源科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Xinyi Chi,Mingyu Dou,Guang Yang,Ruixin Yang,Zunhao Wang,Hengyi Wang,Hua Yang,Wenning Yang,Erkang Liu,Jianmin Dou
The development of efficient and durable non-noble metal photocatalysts remains a major challenge, primarily owing to the fast recombination of photogenerated charge carriers and sluggish interfacial reaction kinetics. In this work, a ternary composite photocatalytic system, CdLa 2 S 4 /Mn 0.5 Cd 0.5 S-Co x P (CdLa 2 S 4 /MCS-Co x P), was rationally designed and constructed by coupling the S-scheme heterojunction with the metal-semiconductor Schottky interface, aiming to synergistically enhance multi-channel charge separation and migration. The construction of an S-scheme heterojunction comprising CdLa 2 S 4 and Mn 0.5 Cd 0.5 S (MCS) significantly facilitates the spatial separation of photogenerated electrons and holes driven by the built-in electric field, while simultaneously preserving their strong redox capability. Meanwhile, the Co x P acts as both an efficient electron acceptor and proton reduction site, its Schottky barrier at the interface further lowers the energy barrier for the hydrogen evolution reaction and accelerates surface reaction kinetics. Consequently, the CdLa 2 S 4 /MCS-Co x P composite exhibits a remarkable hydrogen evolution rate of 11.04 mmol g −1 h −1 , outperforming pristine MCS and CdLa 2 S 4 by factors of 10.32 and 38.07, respectively. This study offers a practical strategy for the rational design of multi-interface photocatalytic architectures with robust redox ability.
研究领域:
材料科学
·
催化
·
纳米技术
·
能量转换
·
半导体物理
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Jingting Sun,Shangshang Wang,Xingyu Liu,Huan Yu,Jiaming Li,Chao Liu,Qinfang Zhang,Zhigang Zou
Photocatalytic hydrogen production (PHE) technology has emerged as a sustainable approach to convert solar energy into hydrogen energy, exhibiting significant potential for clean energy applications. In this study, an ultrasonic-assisted method was adopted to fabricate S-scheme MoSe 2 /Mn 0.5 Cd 0.5 S (MoSe 2 /MCS) composites, where intimate heterostructures are formed through interfacial Mo–S bonds between MCS and MoSe 2 . The atomic-level Mo–S bonds establish charge transport pathways and enable directional control of charge transfer. The as-constructed S-scheme MoSe 2 /MCS photocatalysts exhibit two critical advantages: enhanced charge carrier separation rate and improved overall redox capacity. Under visible-light irradiation, the MoSe 2 /MCS composites significantly outperform pure MCS in PHE performance. The optimal 5-MoSe 2 /MCS composite demonstrates the superior PHE activity, achieving an apparent quantum yield value of 71.16 % at 400 nm and remarkable photocatalytic stability. Key characterization techniques, including (solution-based) time-resolved photoluminescence technique, theoretical calculation, photoelectrochemical measurements, were employed to elucidate the positive correlation between ion-carrier interaction and charge separation efficiency, thereby enhancing the PHE performance. Based on experimental analysis and theoretical calculation, a plausible PHE mechanism for the S-scheme MCS composites is revealed and discussed in detail. These findings provide valuable insights for designing high-efficiency S-scheme heterostructured composites with interfacial chemical bonds.
研究领域:
材料科学
·
物理化学
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纳米催化
·
能源材料
·
光催化
✓ 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）