APPLIED CATALYSIS B-ENVIRONMENTAL
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2023
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IF 22.1
Chao Wu,Weixin Huang,Huanmin Liu,Kangle Lv,Qin Li
Facing the increasingly serious issues of energy crisis and environmental pollution, it is vital to develop efficient and durable photocatalysis systems for hydrogen (H 2 ) production from water splitting. However, for the famous CdS-based systems, the bottleneck of poor efficiency and low stability arisen from photocorrosion has not been broken through yet. In this study, a ternary composite of CdS , MoS 2 and Ti 3 C 2 MXene with intimately contact interfaces was successfully constructed via an in situ growth method, which exhibited reinforced photocatalytic H 2 -production activity and increased photocorrosion resistant capability. Both of experimental characterizations and density functional theory (DFT) calculations well proved that the photogenerated holes and electrons of CdS timely migrated to Ti 3 C 2 and MoS 2 , respectively. As a consequence, the optimal sample displayed a high H 2 production rate of 14.88 mmol·h −1 ·g −1 with a lifetime of up to 78 h, and the component and structure of the composite were kept intact during the photocatalysis reaction. This work highlights the synergistic effect of the Ti 3 C 2 MXene and MoS 2 as redox dual cocatalysts on the promoted photocatalytic performance and durability of CdS, which can be anticipated to significantly enhance the commercial availability of CdS and even boost its incorporation into industrial applications.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Guanqiong Li,Tong Xu,Ruifang He,Chunping Li,Jie Bai
Photocatalytic water splitting is a promising method to obtain clean hydrogen energy, and the corresponding catalyst has received extensive attention. Among them, cadmium sulfide (CdS) has a relatively narrow band gap (2.4 eV) and a high conduction band position. It can be considered to be a good visible light photocatalyst in response to visible light. However, its application is limited because the existence of rapid photo-electron-hole recombination and photo-corrosion. In this work, a series of hollow CdS tubes have been successfully prepared with the novel morphology via simple one-step solvo-thermal method. The as-prepared catalysts displayed great photocatalytic activity for photocatalytic split water product H 2 under light (λ ≥ 350 nm). Due to the presence of the solvent carbon layer, the photo-corrosion of CdS was prevented, so it had good cycle performance. Meanwhile, the appropriate mole of cadmium sulfur dosage was explored and found that 3 mmol was the most suitable. The CdS-3 sample performed the optimal hydrogen (H 2 ) evolution rate (312.6 μmol g −1 h −1 ) within 4 h. In addition, based on various characterization results of the photocatalyst, the novel structure and probable catalytic mechanism were further explored.
研究领域:
材料科学
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能源化学
✓ 已验证
DOI
高影响因子
Reactions
·
2025
·Vol. 6
·期 2
·24
·
IF 2.2
Kuo Zhang,Xiufei Zhao,Hang Qian,Lihong Chen,Biyu Wu,Xiao Yang,Haonan Zou,Yujiao Hu,Feng Chen,Borong Liao,Hu Zhou,Lei Zhang,Tianyi Ma,Yusheng Zhang
Cu2O, a narrow-bandgap semiconductor with visible light absorption capabilities, faces limitations in photocatalytic applications due to photocorrosion from hole self-oxidation and insufficient light absorption. In this work, a series of novel spherical Cu2O/FePO4Z-scheme heterojunctions were successfully synthesized via self-assembly to overcome these challenges. The photocurrent, electrical impedance spectroscopy (EIS), and photoluminescence (PL) tests showed that Cu2O/1.5FePO4(CF1.5) had excellent electron hole separation efficiency. Subsequently, photocatalytic degradation was utilized as a probing technique to further confirm the above conclusions, with the kinetic reaction constants of CF1.5 being 2.46 and 11.23 times higher than those of Cu2O and FePO4, respectively. After five cycles of experiments and XPS analysis, it was found that the content of Cu(I) in CF1.5 did not significantly decrease after the reaction, indicating that it has superior anti-photocorrosion performance compared to single Cu2O, which is also due to the establishment of a Z-scheme heterojunction. Systematic studies using radical scavenging experiments and ESR tests identified ·OH and ·O2−as the main active species involved in photocatalysis. The formation of a Z-scheme heterojunction not only enhances the photocatalytic activity of the CF1.5 composite but also effectively suppresses the photocorrosion of Cu2O, thereby offering a promising approach for enhancing anti-photocorrosion of Cu2O.
研究领域:
材料科学
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环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Xiutong Yan,Biyun Lin,Chuangyu Ning,Xin Wang,Zhihong Chen
CdS is a promising candidate for visible-light-driven photocatalytic H 2 -evolution, but its practical application is still limited by self-photo-corrosion and noble co-catalysts needing. Herein, CdS/NiCo-MOFs (CM) heterojunction was synthesized by an in-situ hydrothermal method , where NiCo-MOFs (BMOFs) acted as platform to inhibit the aggregation of CdS nanoparticles . Furthermore, BMOFs provided dual-reaction sites to improve the photocatalytic H 2 -evolution speed and suppress the photo-corrosion of CdS by taking its Ni-linker as catalytic active sites for water splitting and Co-linker as hole trapping sites to suppress the self-oxidation between S 2− and holes. Therefore, the optimal CM-20% exhibited a remarkable photocatalytic H 2 -evolution rate of 1.810 mmol g −1 h −1 under sunlight irradiation, which is 4.55 times higher than that of CdS. Moreover, CM-20% maintained this high photocatalytic H 2 -evolution rate for 100 h reaction, which for CdS is just 50 h. This research provides insight into designing high-efficiency and photo-stable sulfide-based photocatalyst systems for H 2 -evolution.
研究领域:
材料科学
·
能源化学
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2017
·
IF 9.446
Wenlong Zhen,Xiaofeng Ning,Baojun Yang,Yuqi Wu,Zhen Li,Gongxuan Lu
CdS photocorrosion seriously impeded its application in photocatalysis , especially for water splitting. Here we report new strategies to improve CdS photocorrosion resistance properties significantly by coating Ni 2 P shell and assembling an artificial gill to remove newly formed O 2 from water. Ni 2 P@CdS catalyst can achieve the over-all water splitting under visible light irradiation without addition of any sacrifice reagent and noble metal loading. Compared with CdS itself, the 10Ni 2 P@CdS photocatalyst exhibits excellent photocatalytic activity for hydrogen evolution (251.4 μmol of H 2 in 180 min) with a high AQE (3.89% at 430 nm). This catalyst also presents high photocurrent, low overpotential (−0.32 V vs SCE), and long fluorescence lifetime (16.27 ns) of excited charges. Cd 2+ ions concentration measured by ICP and long term stability results verified the anti-photocorrosion role of Ni 2 P shell on CdS during water splitting reaction. The activity and stability of 10Ni 2 P@CdS is even superior to typical 1Pt@CdS catalyst. Our results confirm CdS can be an active catalyst for photocatalytic hydrogen generation from water under visible irradiation if its stability is enhanced by protection of anti-photocorrosion over-coating shell and removing the nascent formed oxygen from water.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Wan-Ying Li,Jing Liu,Zhi-Rong Li,Ting-Ting Shen,Jun Chen,Zhi-Yi Hu,Wen-Bei Yu,Yu Li,Bao-Lian Su
ZnIn 2 S 4 (noted as ZIS) has great potential in tetracycline degradation due to its suitable band gap structure and great light absorption capability. However, its serious photo-corrosion results in the deactivation of photocatalytic activity. In this work, we try our best to probe the deactivation and regeneration of ZnIn 2 S 4 in photocatalytic degradation of tetracycline. EPR, XPS, and PL results reveal that the deactivation mechanism of ZIS is due to the breakage of Zn-S bonds which results in excessive sulfur vacancies. After choosing Na 2 S as regenerant, the degradation rate in second cycle increased from 57.4 % to 88.1 % and improved from 30.3 % to 76.8 % in third cycle. Ab initio molecular dynamics simulations (AIMD) and density functional theory (DFT) calculations are further conducted for the regeneration mechanism. These results confirm that the negatively charged ions (HS − and OH − ions) produced by hydrolysis of the Na 2 S are attracted to the positively charged sulfur vacancies, promoting the re-bonding of Zn-S bonds and thereby relieve excessive sulfur vacancies. This work not only provides a detailed discussion of performance deactivation caused by photo-corrosion of ZnIn 2 S 4 but also offers new insights into the regeneration mechanism of ZnIn 2 S 4 .
研究领域:
环境科学
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材料科学
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化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
·
2021
·
IF 9.127
Wenwen Li,Hongyan Wang,Zhe Sun,Quanping Wu,Song Xue
Cuprous oxide (Cu 2 O) is an attractive photo-electrocatalyst for sustainable hydrogen production . The main issues limiting the use of Cu 2 O as a photocathode are the severe electron-hole recombination and photo-corrosion in aqueous electrolyte . Herein, to address the above issues, amorphous SiO x overlayers have been deposited on the surface of Cu 2 O as a protective cover using a facile dip-coating method. The overall PEC performances have been greatly improved, as evidenced by the increased photocurrent density (3.1 times of bare Cu 2 O) and improved stability (3.8 times of bare Cu 2 O). The structure and PEC characterizations prove that Si has been gradient-doped into the Cu 2 O, leading to a downward band bending from the bulk to the surface region, which promotes the charge separation and transfer efficiently. In addition, the amorphous SiOx layers serve as protection layers and prevent the Cu 2 O from direct contact with the electrolyte, maintaining a high photocurrent density over the stability test. Decoration with Pt catalyst has further boosted the photocurrent density to be 2.8 mA cm −2 at 0 V vs. RHE with better stability, indicating the synergistic effect of SiOx layer and Pt catalyst This work provides a facile strategy to improve the PEC activity and stability of Cu 2 O, which may be extended to other systems with photo-corrosion problems, such as BiVO 4 or ZnO.
研究领域:
材料科学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Guang Yang,Hao Zhang,Mingyu Dou,Hua Yang,Xingliang Yin,Dacheng Li,Haitao Zhao,Jianmin Dou
To enhance the photocatalytic activity, loading proper semiconductor with high efficiency and low cost is one of the most valid approaches. Herein, various amounts of CoWO 4 as a novel metal-free material were loaded on Mn 0.47 Cd 0.53 S (MCS) nanorods for photocatalytic hydrogen production reaction. The CoWO 4 /Mn 0.47 Cd 0.53 S-25 (CW/MCS-25) exhibits the highest hydrogen production rate of 41.53 mmol·h −1 ·g −1 in the Na 2 S/Na 2 SO 3 system, which is about 2.68 times higher than that of pristine MCS. The Mapping and HRTEM reveals the deposited of CoWO 4 on the MCS. The detailed analyses of XPS, EIS, TRPL spectra and transient photocurrent responses indicate that CoWO 4 and MCS interacted closely and the photogenerated electrons of CoWO 4 can be transferred into MCS. In particular, the introduction of CoWO 4 can further transfer the photogenerated holes of MCS, thereby inhibiting the photocorrosion of MCS and improving photocatalytic activity. This work provides a reference for the exploration of noble metal-free composite material and shows great potential in the photocatalytic application.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2018
·
IF 11.698
Ning Shao,Zhiang Hou,Hanxu Zhu,Jinnan Wang,Corvini Philippe François-Xavier
To improve the visible-light photocatalytic activity and anti-photocorrosion of Ag 3 PO 4 , novel 3D core-shell CQDs/Ag 3 PO 4 @benzoxazine tetrapods with more exposure of {110} facets of Ag 3 PO 4 has been successfully synthesized for the first time by electrochemical oxidation, chemical precipitation and molecular self-assembly reaction. In CQDs/Ag 3 PO 4 @benzoxazine tetrapods, CQDs could not only induce more photocarrier generation from high-energy facets of Ag 3 PO 4 tetrapods but also accelerate the electrons transfer from conduction band of Ag 3 PO 4 tetrapods to the bottom of conduction band of CQDs. Furthermore, silver amine complex could act as a bridge for the photo-electrons flowing from core to shell, which is beneficial to the subsequent free radical chain reaction. In addition, the 3D core-shell structure decreased the solubility of Ag 3 PO 4 . UV–vis DRS, indicating that the band gap of CQDs(0.38%)/Ag 3 PO 4 @benzoxazine (1.65 eV) was far less than that of Ag 3 PO 4 tetrapods (2.0 eV) and traditional Ag 3 PO 4 (2.45 eV). Moreover, the photocurrent tests showed that CQDs(0.38%)/Ag 3 PO 4 @benzoxazine had perfect drift ability of generated photocarriers. Accordingly, the CQDs(0.38%)/Ag 3 PO 4 @benzoxazine tetrapods exhibited excellent visible-light photocatalytic activity and anti-photocorrosion performance. More than 93% of Methylorange and rhodamine B could be photodegraded within 16 min and 10 min over CQDs(0.38%)/Ag 3 PO 4 @benzoxazine tetrapods, respectively. Even after 9 cycles, CQDs(0.38%)/Ag 3 PO 4 @benzoxazine could still remain 95% removal rate of sulfamethoxazole (SMX) with 10 min. Through recycling catalytic experiments and photodegradation pathway explore of SMX, the CQDs(0.38%)/Ag 3 PO 4 @benzoxazine composite suggest its great mineralization capability on sulfonamide antibiotics. The free radicals trapping experiments demonstrated that the holes photoinduced were the main active oxidizing species which played the dominant role in the photocatalytic process. Thus, CQDs(0.38%)/Ag 3 PO 4 @benzoxazine is a promising visible-light responses catalyst for photodegradation of organic pollutants in the environmental protection.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Jinhua Wang,Qiong Zhu,Yunwen Liao,Hongquan Fu,Jinming Chang,Yuling Zhang,Taotao Kan,Hejun Gao,Wenchao Huang
Nano-CuO have been grown on the surface of CdS nanorods by a simple solution-phase reaction, which greatly enhanced the hydrogen evolution ability of CdS. The physical chemistry properties of CuO/CdS nanocomposites were investigated by XRD, SEM, TEM, BET, XPS and electrochemical methods. The morphology and crystal structure of CdS were not influenced by the loading of Nano-CuO. And it was helpful to delay the time of electron recombination to the hole, and greatly improved the hydrogen evolution performance of CdS. When the loading of Nano-CuO was 1 wt%, the photocatalytic performance of CdS increases from 105 μmol g −1 h −1 to 3317.5 μmol g −1 h −1 . After several cycles, the structure of CuO/CdS nanocomposites was not changed, and Nano-CuO could effectively prevent the photo-corrosion defects of CdS. This work provides a new way to improve the hydrogen evolution performance of CdS by growing nano-oxide on CdS surface.
研究领域:
材料科学
·
能源化学
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Zhilong Zhang,Lushao Gong,Xingyu Zhan,Bo Hong,Xinqing Wang,Yingchun Xia,Yunxiong Zeng
Silver phosphate (Ag 3 PO 4 ) is a promising photocatalyst, but the photo-corrosion issue limits an effective and comprehensive photocatalysis degradation of tetracycline (TC). In this work, a unique graphitic carbon nitride-Ag 3 PO 4 (KCN-AP (40 %) ) core-shell structure was prepared via a simple chemical sedimentation method. The unique graphitic carbon nitride sheet encloses Ag 3 PO 4 to trap excited electrons from the conduction band position of Ag 3 PO 4 , suppressing the reduction of Ag + and Ag metal deposition on the surface of Ag 3 PO 4 . Under visible light irradiation, the optimized KCN-AP (40 %) can photodegrade nearby 100 % of TC within 20 min with a first-order kinetic constant of 0.127 min −1, which is 3.34 and 3.97-folds higher than those of Ag 3 PO 4 and graphitic carbon nitride, respectively. A series of factors that may affect photoactivity of KCN-AP (40 %) including pH, inorganic ions, and organic matter are investigated. In final, the photodegradation mechanisms and intermediates were proposed based on ex-situ HPLC-MS. This work explains the deep decomposition of TC and presents a facile approach for designing and manufacturing Ag 3 PO 4 based nanohybrids.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2016
·Vol. 4
·期 48
·11449-11456
·
IF 5.066
Xiaolong Lu,Rongguo Wang,Lifeng Hao,Fan Yang,Weicheng Jiao,Jian Zhang,Ping Peng,Wenbo Liu
After UV irradiation of orthorhombic molybdenum trioxide (α-MoO3) nanosheets dispersed in two different solvents including water/ethanol mixed solvents and individual N-methyl-2-pyrrolidinone (NMP), we observed remarkable but distinct morphology changes in combination with different photochromic phenomena. MoO3−x quantum dots (QDs) with both different sizes and oxygen vacancy concentrations could be acquired through this facile and efficient method. The consumption of photoexcited holes played an important role in the morphology changes. In water/ethanol, intercalation of H+ originating from the oxidation of water by photoholes contributes to the acquisition of QDs. While in NMP, we provided a new insight and proved that photocorrosion induced by accumulated holes was responsible for the morphology evolution and acquisition of QDs.
研究领域:
材料科学
·
纳米技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）