Molecular BioSystems
·
2011
·Vol. 7
·期 8
·2452-2458
·
IF 3.825
Jianbo Xiao,Feijiu Wang,Jie Liu,Litong Wang,Guoyin Kai,Xibin Yu
Zero-dimensional nanostructures such as ZnO#ZnS QDs heterojunctures (QDHJs) are green nanoparticles and have gained a tremendous amount of attention. However, very little information is available on the effects of these heterojunctures on the transportation of drugs in blood. Herein, stilbenes were studied for their affinities for common bovine plasma proteins (CBPP) in the presence and absence of QDHJs with different diameters. The affinities of QDHJs for CBPP improved with increasing QDHJs size. QDHJs improved the affinities of resveratrol and polydatin for CBPP by 14.74% to 22.36% and 12.56% to 21.34% depending on the size of QDHJs. The number of binding sites (n) between resveratrol and polydatin for CBPP in the presence of QDHJs were 1.04 ± 0.03 and 1.06 ± 0.04, which were obviously higher than those in the absence of QDHJs (n = 0.89 and 0.92). QDHJs in blood will decrease the free concentration of stilbenes and weaken their pharmacological effects.
研究领域:
药理学
·
纳米生物学
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DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Mei Cai,Chao He,Hulei Yu,Anze Shui
The construction of heterojunction for photocatalysis has garnered much research interest. Herein, we report the successful fabrication of a ternary dual S-scheme ZnO/ZnS/In 2 S 3 heterojunction with a higher photocatalytic capacity via a hydrothermal method . Specifically, the optimized ternary heterojunction ZSI0.35 sample achieves the 100 % photodegradation efficiency of RhB (10 mg/L, 50 mL) within 10 min, approximately 17 and 8 times higher than pure ZnO and ZnO/ZnS binary heterojunction, respectively. Further characterization results confirm the dual S-scheme heterojunction structure in the fabricated ZnO/ZnS/In 2 S 3 ternary heterojunction, and the improvement of photocatalytic properties can be attributed to the enhanced Brunauer Emmett-Teller (BET) surface area, the improved redox capacity of the photocatalyst, and the quick charge transfer. Additionally, the possible photocatalytic mechanism is discussed according to the measurements. This work provides an efficient strategy of promising heterojunction photocatalysts for photocatalytic environmental remediation.
研究领域:
材料科学
·
环境科学
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DOI
高影响因子
VACUUM
·
2023
·
IF 4
Zhen Zhao,Lei Zhang,Yinghua Zhuang,Yang Guo,Hongming Zhang,Wanli Jiao
To achieve rapid detection of hydrogen sulfide (H 2 S) gas at lower temperatures, We present a high-performance PdO/ZnO/ZnS-based H 2 S gas sensor, which was synthesized using a hydrothermal synthesis method in conjunction with an in situ sulfuration process and surface modification by PdO. Vacuum sintering to prevent high temperature oxidation of ZnS. The introduction of PdO not only makes the sheet ZnO/ZnS turn to spherical-like, but also increased the content of adsorbed oxygen. Compared with ZnO/ZnS sample, the PdO/ZnO/ZnS based sensor exhibited a higher response value of 212.4 to 10 ppm H 2 S at lower temperature of 100 °C, with response and recovery times of 2.9 and 1.7 min, respectively. In addition, excellent performance is demonstrated in terms of gas selectivity , repeatability and long-term stability during testing.
研究领域:
材料科学
·
化学传感器
·
环境监测
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DOI
高影响因子
NANOTECHNOLOGY
·
2023
·Vol. 34
·期 50
·505704
·
IF 3.5
Yuhang Chen,Qi Xue,Weiguo Luo,Yu Sun,Ming Li,Tao Hang
Zinc oxide quantum dots (ZnO QDs) have gained wide attention due to their wide excitation spectrum, large Stokes shift, adjustable photoluminescence (PL) spectrum, and excellent biocompatibility. However, low fluorescence intensity and poor stability restrict their further applications. In this work, zinc sulfide (ZnS) as a surface modifier, ZnO/ZnS core–shell QDs with type-I core–shell structure and particle size of 5 nm were prepared via sol–gel method. Transmission electron microscope characterization demonstrates the core–shell structure and spherical morphology of the as-synthesized ZnO/ZnS QDs. The PL spectra show that ultraviolet fluorescence has been greatly enhanced. The maximum fluorescence intensity of ZnO/ZnS core–shell QDs increases by 5288.6% compared with that of bare ZnO QDs. The PL quantum yield increases from 9.53% to 30.95%. After being stored for three weeks, the fluorescence performance can be well retained. Furthermore, the cytotoxicity tests confirm the excellent biocompatibility of ZnO/ZnS core–shell QDs, demonstrating they are good candidates for cell imaging.
研究领域:
材料科学
·
生物医学
·
纳米技术
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DOI
PubMed
高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2024
·Vol. 40
·期 3
·484-489
·
IF 3.1
Xiao Qi,Liu Ting,Zhou Qianhe,Li Liangyu,Chang Chuntao,Gao Dawei,Li Danyang,You Feifei
Photocatalytic CO 2 reduction driven by solar light is a green approach that can decrease the greenhouse effect induced by high CO 2 concentration in the atmosphere and generate carbon-based chemicals/fuels as well. In this paper, non-metal co-catalysts ZnO/ZnS type-II hetero-junction nanoparticles with a rough surface were prepared through a hydrothermal process. When used as a photocatalyst for CO 2 reduction, the optimal one showed good cycle stability and a higher yield rate of 27.8 µmol·g −1 ·h −1 for CO 2 conversion into CO. The outstanding catalytic activity originated from i) the rich interfaces between ZnO and ZnS in the nanoscale could significantly reduce the delivery path of carriers and improve the utilization efficiency of photo-excited electron/hole pairs and ii) enriched surface oxygen defects could supply much more reaction active sites for CO 2 adsorption.
研究领域:
材料科学
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环境科学
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纳米技术
·
催化
·
可再生能源
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DOI
高影响因子
ELECTROANALYSIS
·
2025
·Vol. 37
·期 7
·e70023
·
IF 2.3
Dongxue Sun,Shijie Chen,Jinlong Li,Guozhe Sui,Dongxuan Guo,Ning Liu,Renjiang Lv,Shuang Sui
In this study, ZnO/ZnS/g-C 3 N 4 composite materials were successfully synthesized via a combination of hydrothermal treatment and calcination for the electrochemical detection of ascorbic acid (AA). A systematic experimental design was implemented to evaluate the influence of key parameters, including the amount of ZnS added, the loading ratio of ZnO/ZnS onto g-C 3 N 4 , and the pH conditions during detection, on sensor performance. Comprehensive material characterization was conducted using scanning electron microscopy transmission electron microscopy X-ray diffraction, X-ray photoelectron spectroscopy, and Fourier-transform infrared spectroscopy, providing detailed insights into the composites’ microstructure, crystallinity, elemental composition, and chemical bonding. The sensor exhibited excellent performance for AA detection, with a broad linear detection range of 20–5000 μM, a low detection limit of 1.2 μmol/L (S/N = 3), and high recovery rates between 98.23% and 105.02%, accompanied by low relative standard deviations (1.56–3.12%). Furthermore, application of the sensor in cyclic voltammetry analysis of commercial vitamin C tablets yielded accurate and reliable results, confirming its strong stability, anti-interference capacity, and reproducibility.
研究领域:
材料科学
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电化学
·
纳米技术
·
分析化学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2019
·
IF 4.084
Changlin Li,Shangrong Chen,Yanfang Wang,Zhongyu Hou
ZnO nanorod arrays (NRAs) grown on the Zn foil substrate in the dual alkaline solution by hydrothermal method were first successfully utilized for photoelectrochemical (PEC) water splitting. ZnO NRAs were sufficiently covered on the Zn foil substrate via the reasonable match of the pH value, reaction temperature and reaction time through intensive experimental works. To enhance PEC performance, ZnS was coated on the surfaces of ZnO NRAs by ion exchange. The morphological, structural, optical and PEC characteristics of as-grown ZnO NRAs and ZnO/ZnS heterostructures were investigated. Compared with the pristine smooth and hexagonal ZnO NRAs, the surfaces of ZnO/ZnS heterostructures become rough and rounded in shape. Through the sulfidation treatment, some ZnO/ZnS heterostructures with a diameter of no more than 60 nm break and fade away, leading to a decrease in number density of ZnO/ZnS heterostructures. The texture coefficients of (002) diffraction peaks of ZnO decrease from 2.32 to 2.158. ZnO/ZnS heterostructures exhibit efficient separation rate of electron-hole pairs and enhanced visible light absorption, and thus have higher photocurrent density and photoconversion efficiency. In the polysulfide electrolyte solution , ZnO/ZnS heterostructures show good stability.
研究领域:
材料科学
·
光化学
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纳米技术
·
电化学
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DOI
高影响因子
CRYSTENGCOMM
·
2012
·Vol. 14
·期 19
·6295-6305
·
IF 3.842
Wei Chen,Hong Ruan,Yin Hu,Danzhen Li,Zhixin Chen,Jiangjun Xian,Jing Chen,Xianzhi Fu,Yu Shao,Yi Zheng
We report here a facile one-step strategy to prepare hollow ZnO core/ZnS shell structures by microwave irradiation. The growth mechanism of the hollow core/shell structures was investigated in detail. ZnO truncated hexagonal pyramids first form on as-grown precursor flakes and then evolve into ZnO hexagonal twin crystals, which subsequently grow up and dissolve internally. The hollowing progress is firstly controlled by the Kirkendall effect and then undergoes an Ostwald ripening process. Hollow structures and the formation of ZnO/ZnS heterostructure bring enhanced photocatalytic activities to ZnO core/ZnS shell structures. The formed ZnO/ZnS heterostructures also fill the surface defects of ZnO crystals and improve the stability of the photocatalysts by overcoming the photocorrosion effect of a single ZnO photocatalyst under UV light irradiation. Superoxide radicals (O˙−2) are the key active species in the photocatalytic system of degradation of p-chlorophenol over hollow ZnO core/ZnS shell structures. The photocatalysis process has been discussed and a possible mechanism also has been proposed. This work is helpful to controllably construct other hollow core/shell structures, develop ZnO-based photocatalysts without photocorrosion effect and further study the photocatalytic mechanism of similar systems.
研究领域:
材料科学
·
环境科学
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DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2015
·Vol. 21
·期 36
·12728-12734
·
IF 5.731
Di Bao,Peng Gao,Xinyang Zhu,Shuchao Sun,Ying Wang,Xiaobo Li,Yujin Chen,Han Zhou,Yanbo Wang,Piaoping Yang
Graphical A place in the sun : One dimensional ZnO/ZnS heterostructured nanorod arrays exhibit good performance in photocatalytic hydrogen evolution, and their energy conversion efficiency reaches 13.9 % at room temperature. Semiconducting heterostructures have been widely applied in photocatalytic hydrogen evolution due to their variable band gaps and high energy conversion efficiency. As typical semiconducting heterostructures, ZnO/ZnS heterostructured nanorod arrays (HNRAs) have been obtained through a simple anion-exchange process in this work. Structural characterization indicates that the heterostructured nanorods (HNRs) are all composed of hexagonal wurtzite ZnO core and cubic zinc-blende ZnS shell. As expected, the as-obtained one-dimensional heterostructures not only lower the energy barrier but also enhance the separation ability of photogenerated carriers in photocatalytic hydrogen evolution. Through comparisons, it is found that 1D ZnO/ZnS HNRAs exhibit much better performance in photocatalytic hydrogen evolution than 1D ZnO nanorod arrays (NRAs) and 1D ZnS NRAs. The maximum H 2 production is 19.2 mmol h −1 for 0.05 g catalyst under solar-simulated light irradiation at 25 °C and the corresponding quantum efficiency is 13.9 %, which goes beyond the economical threshold of photocatalytic hydrogen evolution technology.
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PubMed
高影响因子
MATERIALS LETTERS
·
2015
·
IF 2.489
Guangxia Cao,Hanjia Yang,Kunquan Hong,Wenjia Hu,Mingxiang Xu
Aligned zinc oxide/zinc sulfide core–shell nanowire arrays are synthesized on transparent conductive oxide (TCO) glass substrate by sulfurizing ZnO nanowires using a vapor phase method. The length of these nanowires is about 7.3 μm with diameter of ~100 nm. The thickness of the ZnS shell can be controlled by adjusting the reaction time. It is found that the shell layer is well crystallized with preferring growth direction of ZnS [002]. The result indicates that when used to decompose methyl orange (MO), the core–shell nanowire arrays have superior photocatalytic performance under UV-light irradiation, which shows considerable potential applications of this nanocomposite in water purification.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Fen Qiao,Wenjie Liu,Jing Yang,Jiaren Yuan,Kaiyue Sun,Peng Fei Liu
High recombination probability of photo-generated carriers restricts the characteristics improvement of semiconductor photocatalysts . The construction of heterojunction structure has become a common strategy to enhance the transport properties of carriers in catalysts. In this paper, the chain-like structure of ZnO/ZnS heterojunction was prepared by the combination of electrospinning and ion exchange. The composition and structure of ZnO/ZnS composites were studied by SEM, HRTEM , XRD , etc., and the influence of vulcanization degree on the hydrogen production of ZnO/ZnS was studied. Compared with bare ZnO, the chain-like ZnO/ZnS heterojunction shows better photocatalytic hydrogen production performance. When the Na 2 S concentration was 0.064 M, the hydrogen production of ZnO/ZnS exhibits the best performance (1140.64 μmol. g −1 ). Proper vulcanization treatment to construct ZnO/ZnS heterojunction structure is the key factor to boost the hydrogen generation performance. The signification enhancement of photocurrent response was observed in ZnO/ZnS composites, which also confirmed the effective charge transfer between ZnO and ZnS. In addition, the charge transfer mechanism and photocatalytic hydrogen production at the ZnO/ZnS interface was discussed by the density functional theory (DFT) calculation. It was also confirmed that the electrons distribution near the interface of ZnO/ZnS heterojunction accelerates the carrier transport of carriers, so that larger electrons and holes are involved in oxidation and reduction, thus enhancing the photocatalytic hydrogen production activity of catalysts. This work provides practical reference value for the design of new composite photocatalyst and the study of catalytic mechanism.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2020
·
IF 7.489
Qiming Luo,Huiliang Cao,Lanyu Wang,Xiaohan Ma,Xuanyong Liu
Cell-selective toxic titanium is highly desired in clinical dental practice. Herein, based on the in situ conversion of ZnO to ZnO@ZnS, nanorod-array structured coatings with a controllable release features of zinc (Zn), has been successfully fabricated by a two-step hydrothermal method to endow titanium surface with cell-selectivity, i.e. boosting the functions (attachment and migration) of human gingival fibroblasts (HGnFs) while acting against the invasion of pathogenic bacteria. The improved functions of HGnFs over the ZnO@ZnS nanorod-array were attributed to the material’s optimized zinc release, which was decreased from an order of 3.5 mg L −1 to about 0.3 mg L −1 (within the first week). But more importantly, this concentration still had a high antibacterial efficacy up to 100% (against both the S. aureus and E. coli , 10 7 CFU mL −1 ). This study demonstrated that a ZnO@ZnS nanorod-array coating could be a promising strategy to endow titanium dental implants with improved soft tissue sealing and effectively reduce peri-implantitis.
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高影响因子
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