RSC Advances
·
2014
·Vol. 4
·期 69
·36665-36670
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IF 3.708
Juan Feng,Junxue Liu,Guijuan Wei,Jun Zhang,Shutao Wang,Zhaojie Wang,Changhua An
Hollow CdS nanostructures have been synthesized by a two-step ionic exchange route, which consists of a first synthesis of Ag2S intermediated hollow frames derived from the reaction of S2− ions with AgCl cube-tetrapods, and a subsequent ion-exchange conversion of the obtained Ag2S to CdS hollow nanoframes. The investigation of the corresponding transformation process with scanning electronic microscopy (SEM) revealed that the obtained CdS particles preserved the framework of the original template. The solar-driven hollow structured CdS modified with 5% (w/w) of promoter of Pt nanoparticles/nanoclusters manifested a high hydrogen evolution rate of 10.07 mmol h−1 g−1, corresponding to the apparent quantum yield of 9.6% measured at a single length of 435 nm, which is due to efficient charge separation, fast transport of the photogenerated carriers, and fast photochemical reaction at the CdS/Pt/electrolyte interfaces. The present work can benefit the development of other hollow structured nano-photocatalysts with high efficiency towards new energy applications.
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
Catalysis Science & Technology
·
2023
·Vol. 13
·期 4
·1128-1139
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IF 5
Peijing Guo,Shaoyu Yuan,Bingrong Guo,Siwei Li,Yongjun Gao
A CoO–CdS heterostructured photocatalyst CC-2-300 loaded with carbon derived from the biomass material chitosan was synthesized. Under visible-light irradiation, the photocatalytic hydrogen evolution rate can reach up to 10.60 mmol gcat−1 h−1, which is 7.21 times higher than that of pure CdS under the same conditions, with good cycle stability and high apparent quantum efficiency. The control experiments and characterization results prove that the chitosan-derived carbon supported CoO nanorods and CdS nanoparticles are cross-distributed to form a direct Z-scheme heterojunction, which improves the migration efficiency of photogenerated carriers and effectively slows down the recombination rate of photogenerated charges and holes on CdS that is susceptible to photocorrosion, thus improving the efficiency of photocatalytic hydrogen evolution.
研究领域:
材料科学
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能源科学
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环境科学
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DOI
高影响因子
Inorganics
·
2025
·Vol. 13
·期 2
·46
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IF 3
Mingzhang Zhu,Jiannan Song,Senhua Ke,Yanhong Gu,Lina Bing,Zhenjiang Shen,Wanping Chen
Coating disk-shaped materials on the bottoms of containers has become a highly effective method for tribocatalysis enhancement. Here, the effects of Ti coatings on the tribocatalytic degradation of organic dyes by CdS nanoparticles were systematically studied. For both 50 mg/L rhodamine B (RhB) and 20 mg/L methyl orange (MO) solutions, the tribocatalytic degradation by CdS nanoparticles was dramatically enhanced in Ti-coated beakers compared to as-received glass-bottomed beakers, with the degradation rate constant increased by 4.77 and 5.21 times, respectively. Moreover, for tribocatalytic degradation of MO using CdS, two quite different MO degradation modes were identified between Ti and Al2O3coatings. Electron paramagnetic resonance (EPR) spectroscopy analyses showed that more radicals were generated when CdS nanoparticles rubbed against the Ti coating than against the glass bottom, and boron nitride nanoparticles were employed to verify that the enhancement associated with the Ti coating resulted from the interactions between Ti and CdS. These findings underscore the importance of catalyst and coating material selection in tribocatalytic systems, offering valuable insights for the development of efficient environmental purification technologies.
研究领域:
环境科学
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材料科学
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化学工程
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DOI
高影响因子
Journal of Environmental Chemical Engineering
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2025
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IF 7.2
Haonan Guo,Bingzhu Wang,Pengcheng Hu,Haiwang Wang
The photocatalytic material CdS has the advantages of a narrow energy gap and a suitable conduction band potential, but the rapid compounding of photogenerated carriers limits its large-scale application. To overcome these drawbacks, MWCNTs-CdS composites were prepared in this work and the thermodynamic and kinetic behaviour during the hydrothermal growth of MWCNTs-CdS was investigated. On this basis, the microscopic morphology of MWCNTs-CdS was regulated by designing the ratio of oleic acid and oleylamine, which in turn improved the photocatalytic hydrogen production efficiency of MWCNTs-CdS. The results showed that MWCNTs effectively improved the photogenerated carrier utilisation efficiency of CdS, and with the prolongation of hydrothermal time and the increase of temperature, the crystallinity of CdS increased and the photogenerated electron-hole complexation rate decreased. In addition, the introduction of oleic acid and oleylamine led to a decrease in the particle size and an increase in the specific surface area of MWCNTs-CdS, which in turn enhanced the photocatalytic performance. Under the light condition, the hydrogen production rate of MWCNTs-CdS(OAc:OAm=0.5:1.5) reached 189.10 μmol/g/h, which was 13.30 times higher than that of pure CdS.
研究领域:
材料科学
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化学工程
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环境科学
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
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2022
·Vol. 57
·期 47
·21667-21679
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IF 4.682
Jiang Jingjing,Ye Kun,Zhang Wenya,Ren Huajuan,Chen Haoyu,Hu Yuting,Wang Feiyu,Hou Jianhua,Diao Guowang,Chen Ming
Semiconductor photolysis of aquatic hydrogen has become a research hotspot in recent years. Cadmium sulfide (CdS) photocatalyst has been drawn widespread interest due to good visible light absorption, proper energy band potential, and excellent electron-hole pair production rate and mobility. In this work, three morphologies of CdS were synthesized successfully using different cadmium salts and sulfur sources by solvothermal methods. Compared with CdS nanospheres and nanorods, CdS nanosheets photocatalyst could suppressed the photoogenic electron holes better, resulting its high photocatalytic hydrogen generation activity. CdS nanosheets with good photostability showed the fastest photocatalytic hydrogen production rate (12.37 mmol h −1 g −1 ) with the support of simulated solar-light irradiation. These results indicated that the excellent photocatalytic performance of CdS nanosheets may be related to its exposed high index (002) lattice plane, which was main photocatalytic active lattice plane. This work optimized the catalytic properties of materials by regulating the morphology and the exposure of different lattice planes, which were of great significance for solar energy capture and conversion. Graphical Abstract
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
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
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2024
·Vol. 39
·期 4
·869-876
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IF 1.3
Zhang Yanwei,Wang Yanze,Li Junguo,Xie Jingjing,Wang Wenxuan,Fu Zhengyi
We synthesized BiVO 4 mesocrystals with ordered assembly structure, and studied the structural order and the relationship between the photodegradation of Rhodamine B. Au nanoparticles (NPs) were successfully loaded onto Meso-BiVO 4 by light-assisted induction, and Cd nanoparticles were further selected to be deposited on Au nanoparticles to form Z-scheme photocatalyst Meso-BiVO 4 -Au-CdS heterostructures. We try and propose to analyze its ordered assembly structure by XRD for the first time. The results show that Meso-BiVO 4 is a mesocrystal with highly exposed (001) plane and directional assembly structure. The charge separation efficiency of all samples was studied by PL spectroscopy. The results show that the Z-scheme Meso-BiVO 4 -Au-CdS can promote the charge separation and obtain the best carrier separation efficiency. Thus, it has the best photocatalytic activity in the experiment of photocatalytic degradation of rhodamine B. The main active species in the degradation process were confirmed by free radical trapping experiment, and the degradation mechanism was put forward.
研究领域:
材料科学
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环境科学
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光催化
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DOI
高影响因子
CRYSTAL GROWTH & DESIGN
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2024
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IF 3.2
Liguo Gao,Ke Zeng,Ye Jia,Lingxue Kong,Anmin Liu,Tingli Ma,Junjiang Bao
The epitaxial growth of heterojunctions can reduce interface defects and enhance the stability of the crystal structures. However, a higher lattice mismatch can cause local lattice distortions at the interface, resulting in relaxed strains that eventually evolve into structural defects. Herein, a nearly zero-mismatch semicoherent interface was formed with a lattice mismatch (0.3%) by epitaxial growth CsPbBr3 on CdS quantum dots (QDs), leading to a strain-free semicoherent interface. Results demonstrated that CdS/CsPbBr3 heteronanocrystals (HNCs) had excellent stability and high photocatalytic performance compared with CsPbBr3. Theoretical calculations show that the Br–Cd bond forms strong electron coupling, which not only facilitates rapid electron transfer but also provides better structural stability. Compared to the individual CsPbBr3 nanocrystals (NCs), the CdS/CsPbBr3 HNCs exhibited higher stability and 2.1 times higher photocatalytic activity. It suggests that CdS/CsPbBr3 HNCs have potential application value in energy and environmental fields.
研究领域:
材料科学
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纳米技术
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能源与环境科学
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2016
·Vol. 27
·期 6
·6030-6034
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IF 1.798
Yuan Xiaoqin,Li Ming,Ruan Haoran,Yang Yangbowen,Liu Yongping,Zhang Lingzhi
CdS nanoparticles with high uniformity have been synthesized through a new liquid–liquid approach, using dimethyl sulfoxide and the mixture of oleyl amine and oleic acid as separate solvents, more convenient inorganic cadmium salt as cadmium source, and sulfur powder as sulfur source. The process can be conducted under mild conditions. It is found that the initial Cd/S molar ratio of precursor plays important role in controlling particle size. Higher concentration of sulfur precursor results in the larger particle size. The obtained colloidal CdS nanocrystals show obvious absorption and fluorescence in visible light region. When using methylene blue as degradation agent, the obtained CdS nanoparticles exhibit high photocatalytic ability.
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
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
·
2021
·Vol. 45
·期 10
·14985-14994
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IF 5.164
Siqi Qiu,Renbo Guo,Qingyu Wang,Feng Yang,Yibo Han,Xiaoniu Peng,Hui Yuan,Xina Wang
Summary P-type Ni(OH) 2 has been combined with n-type CdS nanorods and nanocrystals for enhanced photocatalytic property due to the p-n junction. Though CdS nanosheets exhibit fast charge transfer and large superficial area, the decoration of Ni(OH) 2 was rarely reported up to now. In this work, the photo-deposition of Ni(OH) 2 nanoparticles on CdS ultrathin nanoflakes was established for efficient photocatalytic H 2 generation. By changing the irradiation time of CdS, the reaction between Ni 2+ and OH − can be controlled for different loading density of Ni(OH) 2 . As the loading density-dependent morphology, light absorption, carrier separation and transfer were systematically studied for the composites, an obvious band gap narrowing from 2.28 to 2.08 eV was revealed, and the carrier separation and transfer between the CdS nanoflakes and Ni(OH) 2 nanoparticles have been enhanced for the composites with deposition time of 3 minutes. These together with the alignment of type “II” bands and the high specific surface area of the flakes and nanoparticles, lead to an optimum H 2 generation of 20.14 mmol/g/h, nearly three times of pure CdS (7.97 mmol/g/h). Such a study not only provides a deposition method of Ni(OH) 2 , but also sheds light on the enhancement strategy for photocatalytic property by controlling the microstructure and aligning the hetero-structured bands.
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
CHEMICAL PHYSICS LETTERS
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2022
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IF 2.719
Jie Xu,Feng Lin,Jingyu Wang,Yujie Wang
Photocatalytic cleavage of lignin C O bonds is a promising way to depolymerize lignin into aromatic value-added chemicals. However, the dispersibility of lignin in solvents and photocatalytic efficiency still face great challenges. Here, a micelle aqueous medium (CTAB-15) composed of hexadecyl trimethyl ammonium bromide and water was successfully prepared. 2-phenoxy-1-phenylethanol (lignin model compounds, PPol) and dioxanesolv poplar lignin have a good dispersion in CTAB-15. Compared to the previous reports, the highest photocatalytic efficiency can be obtained under optimal conditions by using the photocatalyst CdS. The main products formed by photocatalytic cleavage of lignin C O bonds are phenols and ketones. Mechanism studies show that CTAB-15 can provide sufficient hydrogen by photo-driven dissociation of water for photocatalytic cleavage of lignin C O bonds, which is critical to rapidly improving photocatalytic efficiency. The hydrogen, which is used to form acetophenone, comes from H 2 O and PPol. However, the hydrogen needed to form phenol comes only from PPol itself. In addition, the photocatalytic reaction follows a photogenerated electron-hole coupled redox process. This work develops a new direction for promoting the high-value utilization of lignin.
研究领域:
化学工程
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可再生资源利用
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2020
·Vol. 31
·期 22
·19797-19808
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IF 2.22
Wang Peng,Xu Shiyu,Wang Jiayu,Liu Xuezheng
Photocatalysis technology has received much attention on the treatment of antibiotics residues. In this paper, CdS quantum dots (QDs)-decorated TiO 2 (CDS-T for short) have been prepared successfully through a photodeposition method and utilized as photocatalysts for degradation of metronidazole (MTZ). Under visible light irradiation for 60 min, the degradation ratio of MTZ over CDS-T-3 that was prepared by 3 h of photodeposition reached up to 90.9%, which was 1.5 times than that reached over commercial CdS. The decoration of CdS QDs onto TiO 2 can enlarge light absorption range to visible region. Furthermore, greatly improved separation efficiency of photogenerated carriers is realized through forming heterojunction. Activity control experiments demonstrate that O 2 · − serve as the main active species, while ·OH and holes (h + ) play secondary roles on the MTZ degradation. Moreover, electron spin resonance (ESR) technique, terephthalic acid photoluminescence (TA-PL) technique and N,N-diethyl-p-phenylenediamine (DPD) method confirm that larger amounts of active species are generated from CDS-T-3 than that from commercial CdS under visible light. This study can not only offer an easy method to prepare CdS quantum dots-decorated TiO 2 but also enlarge its application in solving the problem of metronidazole contamination.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2019
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IF 3.45
Wei Wang,Jiaojiao Fang
Semiconductor-based heteronanostructures with wide light absorption and efficient electron-hole separation properties exhibit great potential for photocatalytic applications. Here we employ the mesoporous SiO 2 nanoparticles as the template to simultaneously exfoliate the nano-confined g-C 3 N 4 and deposit the CdS nanoparticles to form a series of core-shell SiCN@CdS heteronanostructures for photocatalytic H 2 production under the visible light irradiation. Based on the physicochemical characterizations, we have been able to discuss the compositions, structures, and properties of the core-shell photocatalysts . Benefiting from the optimized equilibrium state of a relative high specific surface area, light absorption, crystalline degree, and a homogeneous dispersion of the outer CdS nanoparticles, the SiCN@2CdS exhibits the highest photocatalytic activity and stability for H 2 production under the visible light irradiation. Results also suggest that the existence of the SiO 2 template is benefit to suppress the aggregation and improve the recyclability of the core-shell photocatalysts when they are applied in the aqueous phase. The present study suggests a new sight on the template-assisted designing and synthesizing high-reactive, low-cost, environmental-stable, and easy-recyclable photocatalysts by precisely controlling the microstructures.
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
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