JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2019
·
IF 6.361
Chenyang Zhang,Wanni Wang,Mengli Zhao,Jun Zhang,Zhengbao Zha,Sheng Cheng,Haiwu Zheng,Haisheng Qian
Rational design of photocatalysts with heterostructure is of scientific and technological interest for taking full advantage use of solar energy. Here we demonstrate a facile method to fabricate Zn 0.5 Cd 0.5 S/Bi 2 S 3 composite nanospheres , in which Bi 2 S 3 nanorods grown on the surface of Zn 0.5 Cd 0.5 S nanospheres. The as-prepared Zn 0.5 Cd 0.5 S@ZnS core-shell nanospheres play a vital role in formation of the Zn 0.5 Cd 0.5 S@Bi 2 S 3 composite nanospheres. The Zn 0.5 Cd 0.5 S/Bi 2 S 3 composites show both excellent photocatalysis and photothermal effect. Nanorods-like Bi 2 S 3 show wide optical absorption from visible to near infrared light and photocurrent response, which enable enhanced full spectrum absorption of the heterostructured photocatalyst and photocurrent for overall photocatalytic performance. Additionally, Bi 2 S 3 nanorods with photothermal effect would synergistically increase the temperature of the micro-environment around the catalysts of Zn x Cd 1−x S. Thus, the Zn 0.5 Cd 0.5 S/Bi 2 S 3 composites exhibit a little better photocatalytic activity than that of pure Zn 0.5 Cd 0.5 S. The present study provides a promising strategy for the rational design of efficient sulfide semiconductor heterojunction catalysts for making the utmost of solar fuels in dealing with organic pollutants from wastewater.
研究领域:
材料科学
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环境科学
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产品关联
DOI
PubMed
高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2021
·
IF 3.927
Xing-Liang Yin,Lei-Lei Li,Yao Lu,Shu-Rui Han,Jian-Min Dou,Da-Cheng Li
A novel pomegranate-like Zn x Cd 1-x S@MoS 2 core@shell nano-heterostructure was synthesized by using a facile one-pot solvothermal approach. In this architecture, the MoS 2 nanosheet and well-dispersed Zn x Cd 1-x S nanospheres serve as peel and seeds, respectively. While maintaining the advantages of nanoscale materials, such as high ratio of surface to volume and a relatively short charge transportation path, this unique structure also provides some additional positive features for H 2 generation application: (1) the intimate contact of MoS 2 and Zn x Cd 1-x S contributes to the well-defined heterostructure formation and thus enhances H 2 generation efficiency; (2) the MoS 2 nanosheets with amorphous-like structures providing numerous active sites for H 2 generation; (3) the multiple pore nano structure promotes mass transfer and allows the active site through exposure; (4) the coated MoS 2 with superior chemical stability protects Zn x Cd 1-x S from photocorrosion and disaggregation. With those advantages, the Zn x Cd 1-x S@MoS 2 heterostructure exhibits a high photocatalytic H 2 evolution rate of 28.22 mmol g −1 h −1 far exceeding that of pristine Zn x Cd 1-x S by a factor of more than 56 and maintains long term stability with no obvious active deterioration in 24 h performance evaluation. Moreover, the one-pot synthesis of this heterostructure significantly saves time and energy, rendering it cost-efficiency. The demonstrated strategy here could have great significance in the design and fabrication of the low-cost and high-efficient heterogeneous photocatalysts .
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 the Taiwan Institute of Chemical Engineers
·
2023
·
IF 5.7
Linjuan Wang,Mingpu Kou,Julie Tournet,Siva Karuturi,Ling Zan
Background Recognized for its high calorific value, clean and non-polluting properties, hydrogen is considered to be one of the most attractive solutions to the impending energy crisis. Photocatalytic water splitting has been widely investigated for its promise to produce hydrogen in a sustainable, environmentally friendly and low-cost approach. In pursuit of high photocatalytic efficiency, multiple strategies haven been explored such as doping, co-catalyst modification and heterojunction construction realizing promising improvements. Methods We synthesized CdS doped with Zn ions and modified with MoS 2 as co-catalyst to form Zn x Cd 1− x S solid solution and MoS 2 -Zn 0.25 Cd 0.75 S heterojunction using a simple one-step hydrothermal method. The synthesized catalyst was used water splitting under visible light irradiation. The structural and morphological characteristics of these materials, along with their photocatalytic mechanisms, were investigated using multiple techniques such as SEM, TEM, XPS, PL, etc. Findings The photocatalyst consisting of 0.9 wt.% MoS 2 -Zn 0.25 Cd 0.75 S achieved a production rate of 6276 μmol h −1 g −1 , which is 17.4 times higher than that of pure CdS and 1.6 times higher than that of Zn 0.25 Cd 0.75 S. The composite also demonstrated a high apparent quantum yield of 11.1 % at 420 nm. The mechanism of the water splitting process, revealed through various techniques, introduces novel pathways for crafting high-efficiency photocatalysts with an internal electron-hole separation heterostructure.
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
Frontiers of Chemical Science and Engineering
·
2021
·Vol. 15
·期 6
·1561-1571
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IF 4.204
Quan Huiying,Qian Kejiang,Xuan Ying,Lou Lan-Lan,Yu Kai,Liu Shuangxi
It is of broad interest to develop emerging photocatalysts with excellent light-harvesting capacity and high charge carrier separation efficiency for visible light photocatalytic hydrogen evolution reaction. However, achieving satisfying hydrogen evolution efficiency under noble metal-free conditions remains challenging. In this study, we demonstrate the fabrication of three-dimensionally ordered macroporous SrTiO3 decorated with Zn x Cd 1 − x S nanoparticles for hydrogen production under visible light irradiation (λ > 420 nm). Synergetic enhancement of photocatalytic activity is achieved by the slow photon effect and improved separation efficiency of photogenerated charge carriers. The obtained composites could afford very high hydrogen production efficiencies up to 19.67 mmol·g −1 ·h −1 , with an apparent quantum efficiency of 35.9% at 420 nm, which is 4.2 and 23.9 times higher than those of pure Zn0.5Cd0.5S (4.67 mmol·g −1 ·h −1 ) and CdS (0.82 mmol·g −1 ·h −1 ), respectively. In particular, under Pt-free conditions, an attractive hydrogen production rate (3.23 mmol·g −1 ·h −1 ) was achieved, providing a low-cost and high-efficiency strategy to produce hydrogen from water splitting. Moreover, the composites showed excellent stability, and no obvious loss in activity was observed after five cycling tests.
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
MATERIALS LETTERS
·
2013
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IF 2.224
Hao Wei,Xinglong Ren,Ziyi Han,Tongtong Li,Yanjie Su,Liangming Wei,Fengsong Cong,Yafei Zhang
z We reported that Zn x Cd 1− x S (ZnCdS) nanorods could be synthesized via a facile, nontoxic one-pot method. Structural and optical properties of ZnCdS nanorods were characterized by relevant equipments. The x value (Zn/(Zn+Cd)) could be altered across the entire range from 0.21 to 0.89 by changing the ratio of cation precursor contents. The band gap energy ( E g ) could be tuned linearly from 2.68 eV to 3.59 eV with respect to x . We also performed first-principles calculations to prove the experimental variation trend of band gap energy. Results showed that the replacement between Zn and Cd influenced the distribution of the electronic structure, and therefore determined the band gap energy.
研究领域:
材料科学
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物理化学
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DOI
高影响因子
Catalysts
·
2025
·Vol. 15
·期 3
·266
·
IF 4
Lei Yang,Lihui Wang,Han Xiao,Di Luo,Jiangzhi Zi,Guisheng Li,Zichao Lian
The efficient separation of photo-generated electrons and holes is significantly importance for enhancing photocatalytic performance. However, there are few reports on precisely constructing interfaces within a single nanocrystal to investigate the mechanism of photoinduced carrier transfer. In this study, nanorod heterodimer-structured CuS/ZnxCd1−xS heteronanocrystals (CuS/ZnCdS HNCs) were successfully synthesized as a typical model to explore the photoinduced carrier dynamics in the photocatalytic hydrogen evolution reaction (HER). The CuS/ZnCdS HNCs exhibited a photocatalytic hydrogen evolution activity of 146 mmol h⁻1g⁻1under visible light irradiation, which is higher than most reported values. Moreover, after 15 h of hydrogen production cycling tests, we found that the material maintained high hydrogen production performance, indicating excellent stability. The CuS/ZnCdS HNCs achieved an apparent quantum yield (AQY) of 69.2% at 380 nm, which is the highest value reported so far for ZnCdS- or CuS-based photocatalysts. The remarkable activity and stability of the CuS/ZnCdS HNCs were attributed to the strong internal electric field (IEF) and Z-scheme mechanism, which facilitate efficient charge separation, as demonstrated by in situ X-ray photoelectron spectroscopy (XPS) and electron paramagnetic resonance (EPR) analyses. This discovery provides a new approach for constructing Z-scheme heterogeneous copper-based nanocomposites within nanocrystals and offers guidance for improving photocatalytic activity.
研究领域:
材料科学
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光催化
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纳米技术
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DOI
高影响因子
Inorganic Chemistry Frontiers
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2025
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IF 6.4
Ting-Ting Shen,Jing Liu,Fang-Yuan Bai,Wei-Wei Xu,Xue Yong,Zhi-Rong Li,Jing-Ru Han,Jun Chen,Heng Zhao,Zhi-Yi Hu,Yu Li,Bao-Lian Su
Biomass photoreforming to coproduce sustainable hydrogen and valuable chemicals is a potential strategy for alleviating energy and environmental issues. However, the lack of bifunctional catalysts to efficiently achieve the “one stone kills two birds” scenario greatly limits its practical application. Herein, we rationally design a three-dimensionally ordered macro-porous structure (3DOM) CaTiO3 (CTO) to address the mass diffusion and light harvesting and to load ZnxCd1-xS (ZxC1-xS) quantum dots (QDs) realizing the selective glucose photoreforming process. The regulatable band gap of ZxC1-xS endows 3DOM CTO-ZxC1-xS composites with sufficient light absorbance and adjustable redox potentials. As a result, the optimized 3DOM CTO-Z0.5C0.5S delivers the best performance for sustainable hydrogen evolution from glucose photoreforming with the rate of 4.05 mmol g-1 h-1 and the apparent quantum efficiency (AQY) of 6.48% under monochromatic light of 365 nm. In particular, the well-developed photocatalysts simultaneously produce gluconic acid with the selectivity up to 83.8% from the targeted oxidation of terminal aldehyde group of glucose. The DFT calculations on Gibbs free energy change of HER and the energy difference between reactants and products of OER further reveal that the constructed Z-scheme heterojunction contributes to the spatial separation of photogenerated electrons and holes for a good quantum efficiency and liquid product selectivity. This work demonstrates a sustainable technology for the coproduction of hydrogen and value-added chemicals from photocatalytic biomass valorization.
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Materials Research Express
·
2025
·Vol. 12
·期 4
·045901
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IF 2.2
Yuqi Dong,Qing-an Qiao,Ruping Wang,Jiahua Li,Honglan Cai,Hongwei Gao,Yanbin Xu
With different Zn2+/Cd2+ ratios, ZnxCd1−xS (x = 0.1–0.9) were prepared by a hydrothermal method. The structural and optical properties of them were analyzed via XRD, SEM, XPS, BET, UV–Vis DRS and PL characterization tests. The results from the degradation of methylene blue (MB), rhodamine B (RhB) and tetracycline (TC) under visible light showed that the photocatalytic performance of ZnxCd1−xS (x = 0.1–0.9) series were superior to that of pure ZnS and CdS, and Zn0.6Cd0.4S was the best one. The photocatalytic processes were tested in different water sources, and the data implied that the degradation efficiency of dyes and TC by Zn0.6Cd0.4S in sea water, lake water, and tap water differed a little to the cases in deionized water. The degradation ratio of MB, RhB and TC could reach 98.90%, 98.99% and 91.95% by Zn0.6Cd0.4S. The photocatalytic mechanism was further revealed by active species capture experiments and theoretical calculations. The results indicated that the introduction of Cd2+ led to a decreased band gap and an enhanced response to visible light. The photogenerated electron–hole pair separation efficiency was increased, and the electrons jumped to the conduction band to react on the catalyst surface for the degradation. The effect of the solution pH was studied as well and revealed that a natural pH was preferred. All the data indicated that Zn0.6Cd0.4S exhibited excellent photocatalytic performance and good stability which could be a promising candidate for the degradation of organic pollutants.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2022
·Vol. 10
·期 20
·8101-8108
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IF 8.067
Meiling Xu,Chaomin Gao,Shan Yao,Shubo Sun,Lina Zhang,Kui Li,Xin Cheng
Facilitating the efficient separation of charge carriers is vitally crucial to achieving highly effective photocatalytic intermediate water splitting without any sacrificial reagents in pure water. Herein, the directional modulation separation of charge carrier strategy is proposed for Zn0.5Cd0.5S based on MOF-derived Co@NC and Co–Pi serving as dual charge transfer materials. The Co@NC acts as the electron transporting material to capture electrons and Co–Pi serves as the hole transporting material to extract holes, achieving the efficient separation of charge carriers and dramatically enhancing the photocatalytic performance. Moreover, the improved specific surface area can also provide more abundant active sites. The optimized Co@NC/Zn0.5Cd0.5S/Co–Pi sample achieved yields of H2 and H2O2 of up to 613.8 and 592.7 μmol h−1 g−1 in pure water, which are 13.2 and 14.4 times higher than that of pristine Zn0.5Cd0.5S, accompanied by a notable apparent quantum efficiency of 2.73% at 420 nm and the longest photocatalytic stability for 90 h. This work illustrates the importance of charge carrier separation to the photocatalytic performance and paves the way for designing highly efficient photocatalytic systems without sacrificial reagents.
研究领域:
材料科学
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能源化学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
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2021
·Vol. 11
·期 35
·21642-21650
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IF 3.361
Jing Dong,Wenjian Fang,Weiwei Xia,Qihong Lu,Xianghua Zeng
Hydrogen evolution from water using solar energy is regarded as a most promising process, thus, exploring efficient photocatalysts for water splitting is highly desirable. To avoid the rapid recombination of photogenerated electrons and holes in CdZnS semiconductors, ZnxCd1−xS/ZnS composites were synthesized via a one-step hydrothermal method and then annealed at 400 °C for 60 min under argon flow. ZnxCd1−xS/ZnS composites are composed of ZnS nanosheets decorated with ZnxCd1−xS nanorods, and TEM and UV-vis absorption spectra confirm the formation of the heterostructure between ZnxCd1−xS nanorods and ZnS nanosheets. Because of the well-matched band alignment, stronger optical absorption and larger carrier density, Zn0.2Cd0.8S/ZnS has the highest hydrogen production, with a photocatalytic hydrogen production rate up to 16.7 mmol g−1 h−1 under visible light irradiation. Moreover, the photocatalyst also exhibits high stability and good reusability for hydrogen production reaction. The facile and efficient approach for ZnS based heterostructures could be extended to other metal compound materials.
研究领域:
材料科学
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能源化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2017
·Vol. 23
·期 65
·16653-16659
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IF 5.317
Shuangshuang Kai,Baojuan Xi,Yifeng Wang,Shenglin Xiong
Graphical Monodisperse submicrospheres : A one-pot method was developed for the preparation of monodisperse submicrospheres of core–shell CdS and its core–double shell derivative CdS@Zn x Cd 1− x S. Owing to its special semiconductor heterojunction, CdS@Zn x Cd 1− x S shows remarkably improved activity for H 2 evolution in comparison to bare CdS under visible-light irradiation (see figure). Chalcogenide micro/nanocomposite structures have been attracting worldwide attention due to prospective applications in photocatalytic hydrogen production. Well-defined micro/nanostructures with pronounced properties are of extraordinary importance. Herein, a facile one-pot method for the synthesis of monodisperse, size-controllable CdS core–shell and CdS@Zn x Cd 1− x S core–double shell submicrospheres, which were engineered with respect to structure and size, is reported. CdS core–shell submicrospheres with different sizes were selectively prepared for the first time. The growth mechanism was investigated in detail by monitoring the time-dependent morphology of intermediates by TEM. By introduction of a zinc precursor in the synthetic system, CdS@Zn x Cd 1− x S core–double shell submicrospheres were obtained by cation exchange of CdS with zinc ions, with a process of diffusion of CdS towards the outside and transformation of Zn x Cd 1− x S crystallites. The H 2 evolution rate over CdS@Cd x Zn 1− x S (5.17 mmol h −1 g −1 ) is 12.3 times that of CdS core–shell structures (0.42 mmol h −1 g −1 ) under visible light, owing to the efficient charge separation, as demonstrated by electrochemical impedance and transient-state time-resolved photoluminescence spectroscopy. Furthermore, CdS@Zn x Cd 1− x S core–double shell structures exhibited excellent stability over 20 h of hydrogen production.
研究领域:
材料科学
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纳米技术
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能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
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2021
·Vol. 56
·期 9
·5717-5729
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IF 4.22
Lu Lili,Ma Yongjin,Dong Rui,Tan Pengfei,Chen Yi,Pan Jun
A series of Zn x Cd 1−x S solid solutions were synthesized through a simple one-step chemical bath co-precipitation route. The microstructure, morphology, composition and optical properties had been thoroughly investigated. The results showed that the as-obtained Zn x Cd 1−x S samples exhibited monodisperse spherical feature. These monodisperse Zn x Cd 1−x S spheres were composed of a large number of 5–10 nm crystal grains. The chemical composition of the Zn x Cd 1−x S solid solutions can be controlled by adjusting the ratio of Zn source to Cd source and the dosage of ammonia solution. Meanwhile, the energy band structure and photocatalytic properties can be optimized. The photocatalysis experiment results revealed that the as-synthesized Zn 0.30 Cd 0.70 S sample exhibited optimum water splitting performance. The satisfactory hydrogen evolution rate (HER) of Zn 0.30 Cd 0.70 S reached 27.004 mmol g −1 h −1 even without any cocatalysts, which was more than 48 times that of pure CdS (0.561 mmol g −1 h −1 ). This enhancing effect can owe to the balance between light absorption capacity and redox potential caused by the incorporation of Zn in the Zn x Cd 1−x S solid solutions.
研究领域:
材料科学
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化学工程
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能源科学
✓ 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）