APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Ping Bai,Junyu Lang,Song Wang,Haojie Tong,Wenling Du,Zhanli Chai
The elaborate modulation of charge transfer in Z-scheme heterojunctions is of significant importance yet poses a formidable challenge for achieving efficient photocatalytic hydrogen production . The present study reports the fabrication of ZnCdS nanoparticle wrapped by NiCo-layered double hydroxide with enriched oxygen vacancies (ZCS@LDH-O v ) was fabricated, which exhibits enhanced interfacial binding and internal electric field (IEF) in comparison to ZCS@LDH. Under visible-light irradiation, the as-prepared ZCS@LDH-O v exhibits a superior photocatalytic H 2 production rate of up to 2.68 mmol·g −1 ·h −1 , which is approximately 9.24-fold and 2.68-fold of the pristine ZnCdS and ZCS@LDH, respectively. The stability of the photocatalyst after 5 cycles is obviously enhanced, with ZCS@LDH exhibiting a remaining hydrogen evolution reaction (HER) rate of 52.7 % and ZCS@LDH-O v demonstrating an impressive remaining rate of 98.2 %. The Z-scheme facilitates rapid charge transfer and efficient separation, thereby enhancing the catalytic activity for HER. The excellent recyclability of ZCS@LDH-O v is primarily attributed to enhanced photo-corrosion resistance of ZnCdS, which can be ascribed to the efficient transfer of photo-generated holes through a rapid interfacial charge pathway.
研究领域:
材料科学
·
能源化学
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DOI
高影响因子
MOLECULES
·
2024
·Vol. 29
·期 12
·2913
·
IF 4.2
Jingren Yang
Developing a low-cost and highly efficient semiconductor photocatalyst for the decomposition of organic pollutants and antibiotics is highly desirable. Herein, FeOOH nanosheets were prepared using a liquid-phase stirring technique and combined with ZnCdS (ZCS) nanoparticles to construct FeOOH/ZCS nanocomposite photocatalysts. The photocatalytic efficiency of the FeOOH/ZCS nanocomposite was evaluated for the decomposition of various pollutants, including rhodamine B, methylene Blue, and tetracycline. The FeOOH/ZCS nanocomposite exhibited significantly higher photocatalytic performance for the decomposition of various organics. Moreover, the optimized FeOOH/ZCS retained more than 90% of its initial photocatalytic activity even after five successful runs. Radical quenching test and electron spin resonance (ESR) analysis revealed that hydroxyl radicals (•OH) play a dominant role for the decomposition of organics. The FeOOH/ZCS Z-scheme heterojunction significantly facilitates higher charge transfer efficiency and the generation of reactive radicals, resulting in excellent photocatalytic degradation performance. This work offers a new approach to synthesis FeOOH-based photocatalyst for the elimination of organics and antibiotics in water.
研究领域:
环境科学
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材料科学
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DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Hanhan Lv,Daniel K. Macharia,Lisha Zhang,Nuo Yu,Yi Zhang,Yumei Zhang,Zhigang Chen,Seeram Ramakrishna
The development of efficient photocatalysts for solar-driven hydrogen production is crucial for addressing energy and environmental challenges. Herein, a full-spectrum responsive “dual-engine” photocatalytic system based on a multifunctional cocatalyst featuring electrons extraction, photothermal heating effect and abundant active sites was successfully designed. In this system, hierarchical NiCo 2 S 4 (NCS)/defective ZnCdS (ZCS-Vs) composite photocatalysts were synthesized through a simple physical mixing method with hierarchical NCS modified ZCS-Vs nanoparticles. Owing to the introduction of black hierarchical NCS, these composite photocatalysts show a wide light absorption range from 300 to 1200 nm due to the introduction of black hierarchical NCS. Under broad-spectrum illumination, the optimized photocatalyst delivered a maximum H 2 production rate of 22.19 mmol·g −1 ·h −1 and an apparent quantum yield of 6.29 % at 420 nm, corresponding to roughly a 42-fold improvement over pure ZCS-Vs. This outstanding H 2 evolution performance originates from three key factors. First, the metallic nature and high work function of NCS enable the formation of a Schottky junction with ZCS-Vs, which efficiently extracts photogenerated electrons from ZCS-Vs for the reduction of H + ions. Second, under photoexcitation, NCS exhibits a strong localized surface plasmon resonance (LSPR) effect, leading to a rapid increase in local temperature on the catalyst surface. This localized heating further elevates the overall reaction solution temperature, thereby reducing the energy barrier for photocatalytic H 2 evolution. Third, 3D hierarchical structure of NCS not only inhibits nanoparticle aggregation and provides abundant active sites, but also enhances light harvesting through internal scattering, thereby maximizing both charge separation and photothermal efficiency. Consequently, this “dual-engine” photocatalytic system provides a feasible pathway for designing photothermal-assisted composite photocatalysts to enhance photocatalytic H 2 evolution efficiency.
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DOI
PubMed
高影响因子
Nano Research
·
2021
·Vol. 15
·期 2
·996-1002
·
IF 8.897
Ha Enna,Ruan Shuhong,Li Danyang,Zhu Yuanmin,Chen Yanping,Qiu Jiangyuan,Chen Zhaohui,Xu Tingting,Su Jingyun,Wang Luyang,Hu Junqing
Metal chalcogenide solid solution, especially ZnCdS, has been intensively investigated in photocatalytic H 2 generation due to their cost-effective synthetic procedure and adjustable band structures. In this work, we report on the defect engineering of ZnCdS with surface disorder layer by simple room temperature Li-ethylenediamine (Li-EDA) treatment. Experimental results confirm the formation of unusual Zn and S dual vacancies, where rich S vacancies (V S ) served as electron trapping sites, meanwhile Zn vacancies (V Zn ) served as hole trapping sites. The refined structure significantly facilitates the photo charge carrier transfer and improves photocatalytic properties of ZnCdS. The disordered ZnCdS shows a highest photocatalytic H 2 production rate of 33.6 mmol·g −1 ·h −1 under visible light with superior photocatalytic stabilities, which is 7.3 times higher than pristine ZnCdS and 7 times of Pt (1 wt.%) loaded ZnCdS.
研究领域:
材料科学
·
化学
·
光催化
·
可再生能源
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DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2020
·
IF 16.683
Munir Ahmad,Xie Quan,Shuo Chen,Hongtao Yu,Zhenxing Zeng
Metal sulfide photocatalysts have been leading edge for hydrogen evolution reaction (HER) and solar energy conversion due to their suitable electronic and optical properties. The efficiency of these photocatalysts is mostly restricted by slow transfer of photogenerated holes and sluggish water dissociation kinetics. Here, we proposed HER catalyst comprising of Pt-CrO x sites loaded on ZnCdS nanocrystal (ZnCdS/Pt-CrO x ) that employing a redox couple ( OH/OH − ) transport mechanism to efficiently relay of holes in alkaline media. The Pt sites provide optimal hydrogen adsorption energy and CrO x sites support water dissociation, which speed up water dissociation kinetics and leads to a noticeable enhance in HER (21.1 mmol g −1 h −1 ) and phenol degradation. Such efficient activity could be associated to a better mobility of redox couple and fast water dissociation kinetics in alkaline solution. These types of related works open pathways to generate hydrogen from the sea water, largest water source on earth.
研究领域:
材料科学
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能源化学
·
环境科学
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DOI
高影响因子
ADVANCED MATERIALS
·
2025
·
IF 26.8
Zehao Ma,Shaoqi Zhan,Yule Zhang,Artem Kuklin,Yinxiang Chen,Yingwu Lin,Han Zhang,Xiaohui Ren,Hans Ågren,Ye Zhang
The oxidative degradation of plastics in conjunction with the production of clean hydrogen (H 2 ) represents a significant challenge. Herein, a Ni 3 S 4 /ZnCdS heterojunction is rationally synthesized and employed for the efficient production of H 2 and high-selectivity value-added chemicals from waste plastic. By integrating spectroscopic analysis techniques with density functional theory (DFT) calculations, a solely electron transfer-mediated reaction mechanism is confirmed, wherein Ni 3 S 4 extracts electrons from ZnCdS (ZCS) to promote the spatial segregation of photogenerated electrons and holes, which not only facilitates H 2 production but also maintains the high oxidation potential of holes on the ZCS surface, favoring hole-dominated plastic oxidation. Notably, the catalyst exhibited efficient H 2 production rates as high as 27.9 and 17.4 mmol g −1 h −1 , along with a selectivity of 94.2% and 78.3% in the liquid product toward pyruvate and acetate production from polylactic acid (PLA) and polyethylene terephthalate (PET), respectively. Additionally, carbon yields of 26.5% for pyruvate and 2.2% for acetate are measured after 9 h of photoreforming, representing the highest values reported to date. Overall, this research presents a promising approach for converting plastic waste into H 2 fuel and high-selectivity valuable chemical products, offering a potential solution to the growing issue of “ White Pollution ”.
研究领域:
环境科学
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材料科学
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能源化学
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DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 42
·20146-20153
·
IF 3.925
Zhengxing Gong,Jing Luo,Xinrong Shao,Xu Sun,Huan Wang,Dan Wu,Dawei Fan,Yuyang Li,Qin Wei,Huangxian Ju
A novel quenching electrochemiluminescence (ECL) immunosensor for the trace detection of neuron-specific enolase (NSE) was developed. Doping CdS with Zn2+ to obtain ZnCdS not only significantly improves the original properties of CdS, but also can be loaded onto the surface of g-C3N4 to form a special complex structure, which effectively improves the ECL performance of g-C3N4. Rh0.6Ru0.4 alloys with flower-like structures were prepared by simple hydrothermal synthesis, with excellent electrical conductivity and catalytic performance. Due to its special flower-like structure with a large specific surface area, Ag nanoparticles can be uniformly loaded on its surface to form Rh0.6Ru0.4@Ag composites. Through spectral comparison, it was found that Rh0.6Ru0.4@Ag has strong UV-vis absorption in the ECL emission wavelength range of g-C3N4, which can generate resonance energy transfer, thereby effectively quenching the ECL signal. The immunosensor has a wide detection range with a detection limit of 16 fg mL−1 (S/N = 3), good stability and biocompatibility, and has great potential in clinical application.
研究领域:
分析化学
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生物传感器
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生物医学工程
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材料科学
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DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2021
·
IF 3.498
Xiang Qin,Rong Cao,Wensheng Gong,Liping Luo,Guojun Shi,Lijun Ji,Aiping Zhu
ZnCdS/TiO 2 /Na-MXene composites were prepared by a hydrothermal process to obtain an excellent photocatalyst with photo-corrosion resistant property. Under hydrothermal conditions, the surface of Ti 3 C 2 MXene was wrapped by Na + and ZnCdS nanoparticles , which slowed down the further oxidation of Ti 3 C 2 MXene into TiO 2 and improved the utilization rate of MXene. The adsorption capacity of an optimal ZnCdS/TiO 2 /Na-MXene composite to methylene blue reached 299.68 mg/g, confirming a higher MXene content was important for photocatalytic degradation of an organic dye. The basal distance of the MXene layers increased from 10.59 Å to 15.21 Å due to the intercalation of ZnCdS, which could facilitate the transportation and adsorption of organic pollutant in ZnCdS/TiO 2 /Na-MXene. The total removal efficiency was 9.3 times that of ZnCdS in 120 min. When the composites were used for photocatalytic hydrogen production , a relatively higher ZnCdS content was necessary. The hydrogen conversion efficiency of an optimal ZnCdS/TiO 2 /Na-MXene composite under visible light irradiation reached 8436.58 μmol·g −1 ·h −1 , which was 3.3 times that of ZnCdS. The ZnCdS/TiO 2 /Na-MXene composites showed excellent and stable photocatalytic activity in recycling experiments, confirming their excellent photo-corrosion property. These ZnCdS/TiO 2 /Na-MXene composites showed great potential in the application of photocatalytic degradation and hydrogen production, and provided a new way to reduce the oxidation process of Ti 3 C 2 MXene.
研究领域:
材料科学
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环境科学
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能源科学
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DOI
高影响因子
Materials
·
2025
·Vol. 18
·期 18
·4401
·
IF 3.2
Jianxu Zhang,Jingwei Li,Weisheng Guan
Biomass reforming under mild conditions for synergistic hydrogen production, driven by renewable solar energy, has rapidly emerged as a promising strategy that not only enables the efficient reutilization of biomass but also facilitates the generation of high-purity hydrogen. In this work, ZnCdS (ZCS) nanoparticles and CoWO4(CW) nanocrystals were assembled via a solvothermal method to construct a ZCS/CW S-type heterojunction composite. The resultant materials’ physicochemical characteristics were methodically described. With lignin model compounds (PP-ol) and sodium lignosulfonate as substrates, the ZnCdS/CoWO4-10% catalyst demonstrated a significant generation of hydrogen activity, producing hydrogen at rates of 223.30 μmol·g−1·h−1and 140.28 μmol·g−1·h−1, respectively, according to experimental results. The formation of heterojunctions endows composite photocatalysts with higher hydrogen evolution rates compared to single-component catalysts. This is attributed to energy band bending at the interface of the heterojunction, which facilitates efficient charge separation while maintaining strong redox capabilities. High-value compounds like phenol and acetophenone were formed when the oxidation products in the post-reaction lignin model compound solution were subsequently analyzed using high-performance liquid chromatography. Additionally, a convincing mechanism for the catalytic reaction was suggested. It is expected that this study will offer a viable route for the creation of effective photocatalytic materials, high-value organic waste transformation, and sustainable hydrogen production.
研究领域:
材料科学
·
能源化学
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环境催化
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可持续能源
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光催化转化
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DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2018
·Vol. 6
·期 41
·11104-11110
·
IF 5.976
Song Wei,Yue Liu,Mingyue Ma,Yao Wu,Lijian Huang,Daocheng Pan
To reduce the charge injection barrier, we attempt to synthesize thin-shell CdSe/ZnxCd1−xS core/shell quantum dots (QDs) in this work. A low-temperature (90–115 °C) synthetic scheme was developed for highly luminescent CdSe/ZnxCd1−xS core/shell QDs by employing short-chain tert-dodecanethiol as the ligand and low-boiling xylene or octane as the solvent. Thiol-capped CdSe/2ZnxCd1−xS core/shell QDs with two monolayers of the shells were directly synthesized in open air, including CdSe/2ZnS, CdSe/2Zn2/3Cd1/3S, CdSe/2Zn1/2Cd1/2S, CdSe/2Zn1/3Cd2/3S, CdSe/2CdS, and CdSe/1CdS/1ZnS core/shell QDs. These short-chain ligand capped and thin-shell QDs were used as the emitting layers to fabricate quantum dot light emitting diodes (QD-LEDs). The results showed that QDs coated with an alloyed Zn0.5Cd0.5S shell possess the optimal photoluminescence (PL) and electroluminescence (EL) properties as well as a maximum current efficiency of 12.5 cd A−1.
研究领域:
材料科学
·
纳米技术
·
光电技术
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DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2025
·
IF 11.3
Yimin Liu,Qingru Zeng,Wei Lin,Lei Duan,Qiang Wu,Yuezhou Wei,Deqian Zeng
Developing highly efficient uranium removal adsorbents is crucial for environmental remediation purposes. In this study, a novel nanocomposite consisting of nano zero-valent nickel (nZVN) supported on layered ZnCdS nanosheets (nZVN-ZCS) was synthesized using an in situ growth approach. This distinct 0D-2D architecture effectively inhibits the agglomeration of nZVN nanoparticles and synergistically integrates U(VI) adsorption with enhanced reduction, driven by superior electron transfer capabilities. Batch experiments demonstrate exceptionally rapid adsorption kinetics, reaching equilibrium within 20 min, and conform to both the pseudo-second-order and Langmuir models. Notably, the optimal 0.03nZVN-ZCS sample exhibits unprecedented maximum adsorption capacities of 1670 mg/g at 298 K and 2977 mg/g at 318 K (pH 4.0), significantly exceeding the capacities reported for most adsorbents. Additionally, nZVN-ZCS demonstrates high U(VI) selectivity in the presence of coexisting ions and shows excellent potential for continuous treatment of large volumes in dynamic adsorption experiments. The adsorption mechanism, elucidated through techniques such as XPS, FT-IR, TEM, and DFT calculations, demonstrates that nZVN-ZCS facilitates the immobilization and reduction of U(VI) through the action of Ni 0 and S 2- . These findings position the 0D-2D nZVN-ZCS nanocomposite as a highly efficient adsorbent, holding substantial promise for addressing challenges associated with uranium contamination.
研究领域:
环境科学
·
材料化学
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纳米技术
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放射化学
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水处理
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DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Wen Liao,Fangxia Xie,Lulu Zhang,Qing Xi,Long Cao,Yawen Wang,Yunfang Wang,Houfen Li,Rui Li,Caimei Fan,Jianxin Liu,Jiancheng Wang
Photocatalytic water splitting for hydrogen evolution (PHE) is an effective and sustainable strategy to alleviate energy shortages and environmental issues. However, active hydrogen (H*), as a critical intermediate, has low generation and desorption rates that limit the development of PHE. Herein, a ZnCdS/MoO 3-x heterojunction is prepared by a two-step solvothermal method and applied to a photocatalytic hydrogen evolution reaction under visible light conditions. The band structure and electron spin resonance (ESR) confirm the formation of an S-scheme heterojunction in ZnCdS/MoO 3-x , promoting the utilization of photo-generated carriers and thereby enhancing H* generation on ZnCdS. Furthermore, in-situ ESR, quasi in-situ Raman spectroscopy and in-situ DRFTIRS spectroscopy demonstrate that the H* is subsequently transferred from ZnCdS to MoO 3-x via the hydrogen spillover effect. The H* is then confined within the lattice of MoO 3-x and forms H x MoO 3-x in situ. Finally, the electrochemical tests and DFT calculations demonstrate that the H x MoO 3-x acts as a “hydrogen pump”, lowering the H* desorption barriers and ultimately enhancing the hydrogen evolution of the system. Therefore, the optimum hydrogen evolution rate of ZnCdS/MoO 3-x reaches 7.9 mmol·g −1 ·h −1 , which is 26.3 times higher than that of pure ZnCdS, along with a hydrogen storage capacity of 0.36 wt%. This work offers a novel approach for achieving efficient and sustained PHE reactions by modulating the generation and desorption rates of the intermediate H*.
研究领域:
光催化
·
材料科学
·
能量转换
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环境科学
·
物理化学
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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）