JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2023
·
IF 10.9
H.X. Lu,H. Liu,Z.Z. Fu,Y.Y. Chen,H.Q. Dai,Z. Hu,W.L. Zhang,R.Q. Guo
In this study, a two-step method was used to synthesize highly luminescent AgGaS/ZnS/ZnS quantum dots (QDs). In the first step, an inner ZnS shell was formed via a one-pot method, which resulted in a smaller lattice mismatch between the AgGaS core and the outer ZnS shell, thereby facilitating the formation of a thick outer shell. After the two-step shelling process, the synthesized AgGaS/ZnS/ZnS QDs showed an excellent photoluminescence quantum yield (PLQY) of 96.4% with a peak wavelength of 508 nm, representing the highest PLQY reported thus far for AgGaS QDs. Furthermore, the effect of halogen ions in Zn precursors on the shelling process was investigated. It was proposed that the capacity of halogen ions to coordinate with the QDs influenced the balance between Zn cation diffusion and ZnS shelling reaction. Specifically, the ZnS shelling reaction was dominant when ZnCl 2 was employed, while Zn cation diffusion was the dominant process under the I − -rich environment. This work provides insights into the interfacial restructuring during the ZnS shelling and offers a clear map for the tailored synthesis of core/shell QDs.
研究领域:
材料科学
·
化学
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2013
·
IF 3.172
Ge Liu,Dan Hu,Min Chen,Changchun Wang,Limin Wu
Multifunctional PNIPAM/Fe 3 O 4 –ZnS hybrid hollow spheres integrating magnetism, luminescence, and temperature responses into one single entity have been successfully fabricated via a facile method. First, the cross-linked Poly (N-isopropylacrylamide) (PNIPAM) hollow spheres were synthesized via a classical method, named one-pot “self-removing” process. Then, Fe 3 O 4 and ZnS nanoparticles were in situ precipitated on the surface of the PNIPAM hollow spheres. The PNIPAM/Fe 3 O 4 –ZnS hybrid hollow spheres exhibit magnetic property, which indicates the potential application in drug targeting. In addition, ZnS nanoparticles in the shell play an important role as a luminescent label for tracking the drug delivery. Meanwhile, the existence of PNIPAM provides a thermosensitive property. All these results indicate that the obtained composite can be expected to be used as a smart drug delivery material.
研究领域:
材料科学
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生物医学工程
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纳米技术
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产品关联
DOI
PubMed
高影响因子
SENSORS
·
2017
·Vol. 17
·期 6
·1235
·
IF 2.677
Yao Zhao,Xueyong Wei,Niancai Peng,Jiuhong Wang,Zhuangde Jiang
Uric acid (UA) is a kind of purine metabolism product and important in clinical diagnosis. In this work, we present a study of ZnS nanostructures-based electrochemical and photoelectrochemical biosensors for UA detection. Through a simple hydrothermal method and varying the ratio of reaction solvents, we obtained ZnS nanomaterials of one-dimensional to three-dimensional morphologies and they were characterized using field emission scanning electron microscopy (FESEM) and X-ray diffraction (XRD). To fabricate the UA biosensor and study the effect of material morphology on its performance, ZnS nanomaterials were deposited on indium tin oxide (ITO) conducting glass and then coated with uricase by physical absorption. Three kinds of working electrodes were characterized by cyclic voltammetry method. The effect of material morphology on performance of UA detection was investigated via amperometric response based electrochemical method based on enzymatic reaction. The ZnS urchin-like nanostructures electrode shows better sensitivity compared with those made of nanoparticles and nanoflakes because of its high surface-area-to-volume ratio. The photoelectrochemical method for detection of UA was also studied. The sensitivity was increased 5 times after irradiation of 300 nm UV light. These results indicate that ZnS nanostructures are good candidate materials for developing enzyme-based UA biosensors.Keywords:biosensor;enzyme;nanostructures;ZnS;UA
研究领域:
生物化学
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材料科学
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医学诊断
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
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2014
·Vol. 14
·期 7
·5047-5053
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IF 1.339
Liu Li,Jiang Wei,Yao Lei,Yang Xi-Wen,Chen Bin-Hua,Wu Shi-Xi,Li Feng-Sheng
A novel Fe3O4@ZnS nanomaterial with fluorescent and superparamagnetic properties has been successfully fabricated via TOPO-TOP synthesis with an additional coordinating component (OAm). The adsorption of OAm on the preformed magnetite nanoparticles, which were
prepared in phenyl ether with oleic acid and oleyl amine, played an essential role in directing the structure of the Fe3O4@ZnS composites. The obtained materials were characterized by FTIR, TEM, XRD, X-ray photoelectron spectroscopy (XPS), UV-vis, fluorescence spectrophotometer
and VSM. The results indicated that the Fe3O4 nanoparticles were successfully combined with ZnS and the coating of ZnS can be controlled by adjusting the molar ratio of Fe3O4 to ZnS. The saturation magnetization values of Fe3O4,
Fe3O4@ZnS (1:2) and Fe3O4@ZnS (1:5) nanoparticles are 57.0 emu g−1, 44.4 emu g−1 and 34.2 emu g−1, respectively at 300 K and the nanocomposites exhibit better fluorescence without evident quenching.
The combined magnetic and fluorescent properties endow the nanocomposites with great potential applications in “nano-conveyer-belt” platform technology for drug targeting, bioseparation, diagnostic analysis and so on.
研究领域:
纳米技术
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材料科学
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生物医学工程
✓ 已验证
DOI
PubMed
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 87
·84493-84499
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IF 3.289
Yi-Biao Shao,Long-Hao Wang,Jian-Hua Huang
ZnS/CuS nanotubes are synthesized by using ZnO nanorods as the precursor, followed by sulfuration and subsequent cation exchange reaction. The deposition of CuS on ZnS nanotubes are confirmed by EDS analysis, XPS and UV-Vis diffuse reflectance spectroscopy. HRTEM images clearly display the heterojunctions between ZnS and CuS nanoparticles. ZnS/CuS nanotubes exhibit good photocatalytic activity for H2 generation without cocatalysts under visible light irradiation (λ > 420 nm). The H2 generation rate depends on the CuS content in the ZnS/CuS nanotubes. The highest H2 generation rate is 85 times higher than that of copper-free ZnS tubes. The highly improved performance for H2 evolution is supposed to originate from the formation of heterojunctions between ZnS and CuS nanoparticles.
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
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Qian Liu,Wenqian Luan,Xingrong Zhang,Ruiyang Zhao,Jishu Han,Lei Wang
The design of a low-cost, efficient and durable co-catalyst for hydrogen evolution is of great significance for improving photocatalytic activity. In this work, a NiMoP 2 /Cu-ZnS composite photocatalyst was prepared by in-situ growth of NiMoP 2 on the surface of copper-doped zinc sulfide (Cu-ZnS). The test results showed that the hydrogen production rate of the optimized NiMoP 2 /Cu-ZnS under visible light irradiation was significantly improved. Among them, NiMoP 2 /Cu-ZnS-1 exhibited the highest photocatalytic activity (5.13 mmol·g −1 ·h −1 ), which was 2.47 times that of Cu-ZnS and maintained good stability during the reaction. The improvement of hydrogen production performance of the photocatalyst was mainly attributed to the synergistic effect of Cu-ZnS and co-catalyst NiMoP 2 . The ohmic contact formed between Cu-ZnS and NiMoP 2 could improve the separation efficiency of photogenerated carriers and reduce the overpotential of H 2 evolution. Besides, NiMoP 2 was found to provide the active site for the reduction reaction, and accelerate the transfer efficiency of photogenerated electrons. This strategy opens up a new way for the construction of co-catalyst modified semiconductor materials to improve the photocatalytic hydrogen production rate.
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
ACS Applied Energy Materials
·
2022
·
IF 6.959
Jing Dong,Wenjian Fang,Hui Yuan,Weiwei Xia,Xianghua Zeng,Wenfeng Shangguan
Studies on highly efficient noble-metal-free catalysts are regarded as an important task for H2 production by water-splitting. MoS2/ZnCdS/ZnS dual heterostructures were successfully prepared with respective supernatant MoS2 colloidal solutions (called M/ZC/Z) and MoS2 precipitates (M(p)/ZC/Z). Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) images of the M/ZC/Z sample showed that ZnS nanosheets were decorated with ZnCdS nanorods and few-layered MoS2. Then, photocatalytic hydrogen production study was performed and the results showed that the M/ZC/Z sample has a H2 evolution rate of up to 79.3 mmol g–1 h–1 under visible light irradiation with an apparent quantum efficiency of 47.9% at 420 nm with noble-metal-free catalysts, which is nearly 5 times that of the M(p)/ZC/Z sample (15.7 mmol g–1 h–1) and approximately 9 times that of the ZC/Z sample (8.98 mmol g–1 h–1). Cycle tests showed that M/ZC/Z is stable and reusable. Without sacrificial agents, the production rates for hydrogen and oxygen evolution were obtained as 3.15 and 1.55 mmol g–1 h–1, respectively. Time-resolved photoluminescence spectra revealed that the well-matched structure is effective in the separation and transfer of photogenerated electron and hole pairs, leading to the enhancement of the photocatalytic H2 production activity.
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
RSC Advances
·
2016
·Vol. 6
·期 23
·19430-19436
·
IF 3.289
Jin Shen,Chunlei Wang,Shuhong Xu,Yiping Cui
Room temperature ferromagnetism is the precondition of the application of diluted magnetic semiconductors. At present, diluted magnetic nanocrystals (NCs) with room temperature ferromagnetism usually contain toxic elements, such as Cd. In this work, we report nontoxic Co:CuInS2 diluted magnetic NCs, which exhibit room temperature ferromagnetism. After growth of a ZnS shell outside Co:CuInS2 NCs, bright fluorescence can be observed, making as-prepared Co:CuInS2@ZnS NCs with both fluorescence and room temperature ferromagnetism. Besides ZnS shell encapsulation, the preparation of fluorescent–ferromagnetic bi-functional Co:CuInS2@ZnS NCs also relates to the doping amount of Co. Excess Co dopant would quench the fluorescence of the NCs whereas insufficient Co dopant could not offset the diamagnetism of the CuInS2@ZnS NCs. Only under appropriate Co doping do Co:CuInS2@ZnS NCs have both fluorescence and room temperature ferromagnetism.
研究领域:
材料科学
·
纳米技术
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS CHEMISTRY
·
2012
·Vol. 22
·期 42
·22619-22623
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IF 5.968
Yuhan Lin,Fang Zhang,Daocheng Pan
A series of (ZnS)x(CuInS2)1−x hierarchical micro/nano-structured solid solutions with precisely controlled chemical composition were synthesized via a facile one-pot solvothermal method. ZnO, Cu2O, and In(OH)3 are used as the starting materials and dissolved in ethanol dithiocarbamic acid which is formed from CS2 and ethanolamine in situ. The ethanol dithiocarbamic acid not only serves as a thermally-degradable ligand, but also acts as sulfur source during synthesis, and can be completely removed by a simple calcination process. As-prepared (ZnS)x(CuInS2)1−x microspheres have a hierarchical micro/nano structure composed of around 7 nm nanoparticles. These samples show excellent photocatalytic H2 evolution activity under visible-light irradiation without any noble metal loading owing to their high surface area (as high as 101.6 m2 g−1) and unique hierarchical structure.
研究领域:
材料科学
·
能源化学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Mimi Sun,Jiahui He,Wanting Xiang,Wei Zou,Wenfei Song,Yating Xi,Jun Yan,Meimei Zhou,Pingping Luo
The design and construction of diverse heterojunction architectures have emerged as an effective strategy for enhancing the photocatalytic performance of semiconductors. In this study, ZIF-8/TiO 2 composite nanofibers were successfully fabricated by combining electrospinning technology with a facile in-situ solvothermal method, followed by ZIF-8 sulfurization to form ZnS/TiO 2 nanofiber heterostructures. Comprehensive characterization confirmed that ZIF-8 on the surface of TiO 2 nanofibers was completely converted into ZnS, establishing a robust and intimate interface with TiO 2 . The resulting ZnS/TiO 2 heterojunction exhibited remarkable photocatalytic reduction activity for Cr(VI), achieving 100% removal efficiency within 20 min under visible light irradiation. The photocatalytic reaction rate constant of the ZnS@TiO 2 nanofibers was approximately 10 and 319.5 times higher than those of pristine ZnS and TiO 2 nanofibers, respectively. This enhanced photocatalytic performance is attributed to the formation of the heterojunction, which effectively narrows the bandgap of the composite, optimizes photogenerated charge transfer pathways and significantly improves electron-hole pairs separation. Furthermore, mechanistic studies identified photogenerated electrons (e − ) and superoxide radicals ( O 2 − ) as the dominant active species involved in the photocatalytic reduction process. This work provides both fundamental understanding and practical methodology for developing high-performance TiO 2 -based photocatalytic systems, highlighting their potential for advanced water purification technologies.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Progress in Natural Science-Materials International
·
2023
·
IF 4.7
Haiyan Kang,Hongchao Geng,Sisi Shi,Zhongxian Song,Yuting Dong,Xiaole Yan,Chaohai Wang,Yanli Mao,Qingyun Cai
High concentrations of Cu 2+ exceeding what the required level for the cellular process can changes the properties of protein, affects the normal function of the body, but also affect the body's metabolism, so that the body's immunity appears to decline. Detection of Cu 2+ is important for the environmental monitoring. Here, a fluorescence probe that uses heavy metal-free and properties-superior CuInS 2 /ZnS was proposed for detection of Cu 2+ . The fluorescence intensity of CuInS 2 /ZnS quantum dots (QDs) decreased obviously after Cu 2+ were added, and the intensity with the concentration of Cu 2+ showed excellent linear relation within the scope of 0–50 μM, the LOD down to 0.45 μM, a possible detection mechanism was analyzed. The QDs was further applied to the detection of Cu 2+ in drinking water, manifesting the foreground of the current strategy.
研究领域:
生物化学
·
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2019
·Vol. 9
·期 60
·35189-35196
·
IF 3.049
Yi-Wei Cui,Hai-Huan Zhang,Shi-Yong Yu
Efficient C–ZnS/ZnMoO4@MoS2 and C–ZnS/MoS2 nanocomposite photocatalysts, using ZIF-8 derived C–ZnO as a precursor were successfully synthesized using a simple one-pot procedure. This is the first application that involves transforming ZIF-8 into C–ZnMoO4 for photocatalysis. The C–ZnS/ZnMoO4@MoS2 and C–ZnS/MoS2 heterostructures were characterized by X-ray diffraction, UV-vis, X-ray photoelectron spectroscopy, electrochemical impedance spectroscopy, photocurrent measurements, scanning electron microscopy and transmission electron microscopy. The ZM2 sample of C–ZnS/ZnMoO4@MoS2 exhibited enhanced photocatalytic activity of about 2.9 times as high as that of ZIF-8 derived C–ZnO in the reduction of tetracycline hydrochloride, and also showed obvious photocatalytic activity 1.81 and 3.33 times as high as that of a ZM3 sample of C–ZnS/MoS2 and ZIF-8 derived C–ZnO in the degradation of RhB, respectively. The improved photodegradation activity is a result of the heterogenous structure and the tighter contact between C–ZnS and C–ZnMoO4 compared with the physical contact of general heterogenous photocatalysts. The C–ZnS/ZnMoO4@MoS2 heterostructure photocatalyst is expected to be a new type of nanomaterial for the degradation of pollutants from wastewater.
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
危险品化学品经营许可证（带存储）