INORGANIC CHEMISTRY COMMUNICATIONS
·
2024
·
IF 4.4
Hanlu Fang,Mengying Lü,Taohai Li,Feng Li
Heavy metal contamination is a grave environmental concern due to its severe implications for human health and ecosystems, causing carcinogenic and teratogenic effects. This study addresses this pressing issue by exploring the synthesis and application of CdS/SbVO 4 composites as effective photocatalysts. These composites were synthesized by a streamlined two-step hydrothermal method, with investigations conducted on varying molar ratios. The composite with a molar ratio of 0.2:1 demonstrated superior Cr(VI) photoreduction properties under visible light irradiation, exhibiting an efficiency quadruple that of pure SbVO 4 . This enhancement in photocatalytic activity is credited to the augmented separation of electrons and holes facilitated by the integration of narrow band gap materials within the composite. Electrochemical tests indicated the electron transfer mechanism and identified the primary active centers of the samples. The detailed photocatalytic mechanism of the composite was further discussed, grounded on insights derived from free radical trapping experiments and electron spin resonance analyses.
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
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2024
·
IF 4.2
Mei-Xia Zhao,Ning Yang,Heng-Shen Xie,Zheng Yang,Mao-Yan An,Juan Liu,Dong-Qin Guo,Xian-Yong Wei
Solar driven water splitting is a mild and clear H 2 generation process, but low efficiency renders it far away from application. Heterostructure construction provides a promising solution; however, constructing a well-defined, efficient, and low-cost heterostructure is still a challenge but of great importance. Here, we report a hierarchical heterostructures composed by CuS/CdS 2D nanosheets, which was synthesized by using a facile in-situ cation-exchange method. The unique properties of intimate interfaces and widened-and-shorted charge transfer paths for CuS/CdS 2D heterostructures synergistically improve charge transfer and separation. Besides, the enhanced light absorption caused by localized surface plasmon resonance of CuS provides more electrons to attend the reaction of H + reduction into H 2 . Owing to those merits endowed by CuS/CdS heterostructures, the activity of photocatalytic H 2 evolution reaction (HER) was significantly boosted with optimized H 2 generation rate of 21.5 mmol g −1 h −1 which exceeds that of pristine CdS by more than 13 folds.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2019
·
IF 4.784
Dandan Hao,Quanhao Shen,Ju Liu,Lingfei Wei,Rehana Bibi,Bo Fu,Naixu Li,Jiancheng Zhou
In the present work, CdS nanoparticles were integrated into sodium alginate aerogel matrix through a facile method. The CdS particles were successfully incorporated into the network of sodium alginate and highly distributed. Moreover, the accessibility of pore structures of sodium alginate was well-preserved. The resulting hybrid aerogels demonstrated high photocatalytic ability towards Cr (VI) reduction. SA/CdS-2 (mass ratio SA: CdS = 1:2) exhibited the highest reduction efficiency of Cr (VI), which could reduce the concentration of Cr (VI) to 0 mg/L after 60 min illumination. A probably adsorption-photoreduction mechanism was proposed and discussed in detail. The aerogels had excellent reusability and recyclability, avoiding secondary pollution. This work holds a promise to design and fabrication of CdS particles into three-dimensional aerogel network.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SUPERLATTICES AND MICROSTRUCTURES
·
2018
·
IF 2.099
Tianjiao Huang,Xiaoshan Zhang,Huan Wang,Xueting Chen,Lingling Wen,Meixin Huang,Yangshuai Zhong,Hui Luo,Guo Tang,Liya Zhou
In this paper, we developed a simple and convenient method for incorporating graphene with anatase-rutile TiO 2 composite and applied it as photoanode to improve the photovoltaic performance of CdS QDSSCs. Our research indicated in a CdS QDSSC system, the photoelectric conversion efficiency (PCE) of anatase-rutile TiO 2 (TGr0) composite photoanode was 86% higher than that rutile TiO 2 NRs. We also found that the PCE increased first and then decreased with the change of graphene content after the graphene was introduced into the anatase-rutile TiO 2 photoanode. When the ratio of optimized graphene/anatase TiO 2 particles composite that spin-coated on rutile TiO 2 NRs photoanode was 5%, we attained a maximum PCE of 2.20%, which was 178% and 50% higher than that pure TiO 2 NRs (0.79%) and TGr0 (1.47%), respectively.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Zhimin Ma,Sujuan Li
In this work, visible light driven enzyme-free glucose PEC sensor was developed by electrochemically deposited CoO x nanosheets on graphene-CdS nanocomposites modified electrode to achieve both the electrocatalytic and photoelectrocatalytic oxidation of glucose at the resultant CoO x /graphene-CdS nanocomposites modified electrode. Scanning electron microscopy, electrochemical impedance spectroscopy and cyclic voltammetry were used to characterize the morphology and electrochemical properties of the resultant CoO x /graphene-CdS nanocomposites. The CV results demonstrated that decoration of CoO x nanosheets largely enhanced the photoelectrocatalytic activity of graphene-CdS composites toward glucose oxidation in alkaline solution. The glucose detection sensitivity under visible light irradiation is dramatically improved compared to dark condition. Good performance was obtained for the CoO x /graphene-CdS nanocomposites based glucose sensor. The feasibility of the present method was confirmed by good recovery results for glucose detection in human urine samples.
研究领域:
生物传感
·
纳米材料
·
电化学
✓ 已验证
DOI
高影响因子
Plasmonics
·
2014
·Vol. 9
·期 5
·1039-1047
·
IF 2.738
Xu Pei,Li Qiang,Li Tao,Rao Wenye,Wang Yuanzhao,Lan Sheng,Wu Lijun
It is well known that surface plasmon resonance (SPR) can selectively enhance the photoluminescence (PL) from nearby chromophores with a single emission peak at an appropriate distance. Here, we combine white light-emitting CdS quantum dot nanocrystals containing band-edge and surface-state emissions simultaneously with Ag nanoparticles and study the interaction between them. It is found that the surface-state emission is always enhanced while the band-edge emission quenched regardless of the SPR wavelength of Ag nanoparticles. This phenomenon reveals that the SPR of Ag nanoparticles is not enhancing the emission from a wavelength-matched state. We propose that the surface plasmon of Ag nanoparticles is first excited by the energy of the band-edge emission and then the excited energetic electrons transfer to the surface-state of CdS. Through this energy transfer process, the surface-state emission is enhanced and band-edge emission quenched. This investigation can not only deliver understanding of the complicated interaction between metallic nanoparticles and nearby multi-emission-peak contained chromophores, but it also has potential applications in tuning the color temperature of white light-emitting materials.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2018
·Vol. 9
·期 1
·1-7
·
IF 12.353
Lv Bihu,Zhang Huichao,Wang Lipeng,Zhang Chunfeng,Wang Xiaoyong,Zhang Jiayu,Xiao Min
When closely packed into a high-density film, semiconductor nanocrystals (NCs) can interact with each other to yield collective optical behaviours, which are normally difficult to characterize due to the ensemble average effect. Here we synthesized semiconductor NC clusters and performed single-particle spectroscopic measurements to probe the electronic couplings of several giant CdSe/CdS NCs contained in one cluster with nanometer-scale separations. Such a single cluster exhibits multiple emission peaks at the cryogenic temperature with nearly identical photoluminescence decay dynamics, suggesting that the Förster-type energy transfer does not occur among the composing NCs. Surprisingly, strong photon antibunching is still observed from a single cluster, which can be attributed to the Auger annihilation of photo-excited excitons from different NCs. The isolation of several nearby NCs interacting with the above novel mechanism has marked a solid progress towards a full understanding and an efficient control of the operation parameters in NC-based optoelectronic devices.
研究领域:
材料科学
·
光电子学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF POLYMER ENGINEERING
·
2016
·Vol. 37
·期 2
·107-112
·
IF 0.631
Xinjian Cheng,Yiru Jia,Jin Qiang,Lei Wen,Chenlong Zhang,Xiao Yang,Liefeng Liang
Nanosized CdS/polymer composite fiber mats were fabricated via a facile electrospinning processing, and the as-prepared composite fiber mats showed excellent photodegradation ability to methylene blue (MB). Polymers bearing N and S atoms with affinity to Cd 2+ ions were first synthesized and then used to prepare CdS/polymer composite fibers. In this work, coaxial electrospinning was employed to achieve the preparation of the desired composite fibers using special polymers as core and cadmium acetate [Cd(CH 3 COO) 2 ] as shell. Then, fiber mats were immersed in thioacetamide (TAA) solution for several minutes, and CdS/polymer composite mats were obtained eventually. The photodegradation catalytic ability was tested using MB as a model dye under sunlight. The photocatalytic efficiency of the CdS/polymer composite fiber mat was recorded and studied by UV-visible spectra, and it showed high efficiency. Nanofiber mats will find real applications in the treatment of wastewater.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
Catalysis Science & Technology
·
2020
·Vol. 10
·期 5
·1368-1375
·
IF 5.721
Cankun Jiang,Lulu Zhang,Fan Gao,Xueyan Huang,Rui Lei,Yun Ye,Jie Yuan,Ping Liu
A CdS@MoOx core–shell nanorod photocatalyst has been constructed by a one-step in situ photodeposition method, which effectively utilizes the photoproduced-hole-induced dehydration and condensation of Mo–O–H derived from the hydrolyzed product of MoCl5, to successfully deposit a layer of MoOx on the surface of CdS NRs. X-ray photoelectron spectroscopy further confirmed that S–Mo bonds serve as bridges for carrier transport between the core and the shell, significantly reducing the interface impedance and improving the carrier transmission efficiency. Due to the superior interfacial carrier separation as well as the enhanced light absorption, the optimal CdS@MoOx-0.9 nanocomposite exhibits a high hydrogen production performance (5.42 mmol g−1 h−1) under visible light irradiation (λ > 400 nm). We have experimentally shed light on the mechanism of this excellent enhancement performance in detail. Moreover, our work can broaden the range of construction and application of developing other photocatalytic materials containing transition metal oxides.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2013
·
IF 3.554
Yonghai Song,Dandan Zhong,Dan Luo,Mei Huang,Zhenzhong Huang,Hongliang Tan,Lanlan Sun,Li Wang
Better understanding of the interaction between nanoparticles (NPs) and protein is the basis for biological and biomedical applications of NPs. Water-soluble fluorescent CdS NPs have been widely used in the biological and biomedical fields and the study on effect of CdS NPs size on conformation and enzymatic activity of protein might be very important in its application. In this work, the interaction of CdS NPs with different size with type II restriction endonuclease (EcoRI) were investigated by atomic force microscopy, transmission electron microscopy, UV–vis spectroscopy, fluorescence quenching method, CD spectra, laser scanning confocal microscopy and gel electrophoresis. It was found that the equilibrium constant ( k D ) as well as the cooperativity degree of CdS NPs-EcoRI binding (Hill constant, n ) strongly depended on the CdS NPs size. The different curvature of CdS NPs surface could result in different changes of EcoRI conformation. The gel electrophoresis indicated that the decrease in α-helix content more or less affected the activity of EcoRI.
研究领域:
纳米技术
·
生物化学
·
分子生物学
✓ 已验证
DOI
PubMed
高影响因子
Nanoscale
·
2025
·
IF 5.1
Chuwei Zhu,Yuxi Li,Tailei Hou,Xiaole Gu,Xinyuan Li,Le Sang,Jiatao Zhang
Recent advances in microreactor technology have established these systems as promising platforms for colloidal nanocrystal synthesis. Nevertheless, the continuous production of high-quality doped quantum dots (QDs) with precise control over optical properties continues to present significant technical challenges. This study introduces a micropacked bed (MPB) intensified tube microreactor system for the efficient and continuous synthesis of Ag+ doped CdS QDs (CdS:Ag+ doped-QDs). Through systematic optimization of reaction parameters, the MPB system achieved photoluminescent quantum yield (PLQY) of 50.8% under optimized conditions (18 cm MPB filled with 2.0 mm glass beads, 0.2 mL/min flow rate, and 70 °C reaction temperature), and the yield increased to 64.6%. These results represent significant improvements over the traditional batch flask method (40% PLQY, 43.01% yield) and the microreactor method (43% PLQY, 48.41% yield). The developed MPB system demonstrates multiple operational advantages: reaction duration reduced to 30 minutes, simplified fluidic architecture requiring only two pumps (vs. three in conventional systems), and enhancement in flow rate (0.2 mL/min vs. 40 μL/min). Production capacity analysis revealed 6-fold and 2.67-fold increases in CdS:Ag+ doped-QDs output compared to batch flask method and microreactor method, respectively, per unit time. This continuous flow strategy establishes a viable pathway for industrial-scale synthesis of doped quantum dots with enhanced process efficiency and material quality.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Molecular Catalysis
·
2024
·
IF 3.9
Xin-Ni Shao,Yin-Feng Wang,Ming-Yu Qi,Zi-Rong Tang
Simultaneous utilization of photogenerated electrons and holes within a photoredox system enables effective hydrogen (H 2 ) production and organic synthesis, aligning with eco-friendly chemistry principles and current energy challenges. Here, we report the preparation and application of cocatalyst MoS 2 decorated CdS (MoS 2 CdS) composites for the photoredox-mediated C–N coupling of amines to imines and H 2 generation under visible light illumination. The H 2 and N-benzylidenebenzylamine yields for the optimal MoS 2 CdS are 28.9 and 15.0 times higher than those of bare CdS, respectively. Mechanism studies reveal that the enhanced photocatalytic activity results from the MoS 2 acting as an electron sink, which accelerates the separation and migration of photogenerated charge carriers. Additionally, the pH(•CH)NH 2 intermediates are found to play a pivotal role in the dehydrogenative coupling of benzylamine. Furthermore, the MoS 2 CdS composites exhibit universal applicability in the conversion of various aromatic amines into corresponding imines integrated with H 2 evolution.
研究领域:
化学
·
材料科学
·
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）