Materials Science & Engineering C-Materials for Biological Applications
·
2018
·
IF 5.08
Peili Zhao,Jinku Xu,Yongchun Zhang,Weiyue Zhu,Yuezhi Cui
Refractive index (RI) is an important parameter for contact lens biomaterials. In this paper, a novel polymerizable-group capped ZnS nanoparticle (NP) was synthesized by chemical link between hydroxyl group on the surface of ZnS (ME-capped) and isocyanate group of polymerizable molecule of 2-isocyanatoethyl methacrylate. Then the ZnS NP copolymerized with monomer of 2-hydroxyethyl methacrylate (HEMA) and N , N -dimethylacrylamide (DMA) to prepare high refractive index hydrogel contact lens with high content of inorganic ZnS NP. Increasing polymerizable-group capped ZnS content in the hydrogels improved its RI value and mechanical properties, however decreased slightly its transmittance, equilibrium (ESR) and lysozyme deposition on the hydrogel surface. The ZnS-containing hydrogels possessed good cytocompatibility and in vivo biocompatibility in rabbit eyes, demonstrating a potential application as high RI ocular refractive correction biomaterial.
研究领域:
材料科学
·
生物医学工程
·
眼科
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Aihua Yan,Tongyang Zhang,Fei Huang,Quande Wang,Shijian Lu,Wenxue Zhao,Ye Gao,Zigao Su,Huaqi Yuan
Multiplex modification is considered as one of attractive methods to achieve highly-efficient photocatalytic water splitting into hydrogen evolution performance. Herein, MoS 2 /S v -ZnIn 2 S 4 /ZnS (MS/S v -ZIS/ZS) composites were constructed by a facile in-situ engineering technique. The sulfur vacancy, Ohmic-type contact and I-type heterojunction were systematically integrated into the composites. The unique structure could not only facilitate a directional charge transfer and accelerate the charge extraction, but also enhance the charge utilization and improve the hydrogen reduction reaction dynamics. As a result, the composites exhibited a promoted hydrogen evolution rate of 9.5 mmol g −1 h −1 , which was about 3.8 times higher than that of pure ZIS. This work may extend the in-situ preparation strategy and motivate the intensive investigation of high-efficiency ZIS-based photocatalysts.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2024
·Vol. 26
·期 15
·11498-11505
·
IF 2.9
Jiannan Sun,Ke Yan,Aizhao Pan,Pan Zhang,Xuehang Chen,Xinyi Shi,Chengyu Shi
Fluorescence nanothermometry based on quantum dots is a current research hotspot for novel non-contact temperature monitoring, and is of vital significance for the modulation and design of the sensing properties of sensors. Herein, a design strategy to modulate the temperature-sensing characteristics of quantum dots based on the thickness of a shell is proposed. In this study, CdSe/ZnS quantum dot/POSS-based temperature probe films with varying fluorescence characteristics were developed, and the influence of the ZnS shell on temperature sensing was examined by varying the thickness of the ZnS shell. The temperature dependency, linearity, range of applications, and reversibility of quantum dot thin film probes were all considerably regulated by the ZnS shell, according to research on quantum dot/POSS-based films coated with various shell thicknesses. The CdSe/ZnS temperature probe with 4 monolayers (MLs) stood out among the rest due to its strong thermal stability (at least 5 cycles), large usable temperature range (20–80 °C), and excellent temperature sensitivity (R2 > 0.994). The results demonstrated that the temperature sensing performance of quantum dots was the consequence of the combined effect of multiple temperature response properties induced by the thickness of the shell, and the shell control of quantum dots to optimize the temperature sensing performance was an essential approach for the design of temperature probes. This work demonstrates the great potential of the shell in tuning the temperature sensing performance of quantum dots and provides a viable approach for the design of quantum dot temperature probes.
研究领域:
材料科学
·
纳米技术
·
传感器技术
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
·
2021
·
IF 2.262
Lili Yan,Siyu Jiang,Pinhua Rao,Guanghui Li,Zongdi Hao,Lei He,Shanliang Liu,Guofeng Shang
Rice hull biochar modified by ZnS nanocrystals (RBZ) was developed as an efficient absorbent for the removal of Cu(II) in aqueous solution. Response surface methodology (RSM) was applied for modeling and optimizing the performance of RBZ. The maximum adsorption capacity of RBZ toward Cu(II) through the Langmuir model fitting was 248.98 mg g−1, which was four times larger than that of rice hull biochar (RB). The adsorption kinetics of Cu(II) and XPS analysis revealed that the chemisorption process played the leading role when using RBZ. Through competition ions study, Pb(II), Cd(II), or Ca(II) can slightly reduce the adsorption of Cu(II). According to the Box Behnken design method, the analysis of variance results showed that the pH and adsorbent dosage had significant effects on the predicted responses of adsorption capacity and removal efficiency. When using the optimum conditions, pH 6, temperature 27 °C, and dosage 0.20 mg mL−1 for removing Cu(II) in solution, the maximum adsorption capacity and relatively higher removal efficiency could be obtained through the 3D response surface plots. The results demonstrated that RSM is feasible to achieve optimal conditions for adsorption capacity and removal efficiency simultaneously toward heavy metals from aqueous medium, and the interaction between them when using the biochar/ZnS composite.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2019
·
IF 2.781
Yuxin Liang,Zhihong Li,Yumei Zhu
Glass-ceramic bond diamond composites with added metallic compounds as reinforcement are generally used to manufacture super-hard grinding tools. The objective of this study was to evaluate the relationship between ZnS and glass-ceramic bond diamond composites and to elaborate on the appropriate ZnS content. Results showed that the physical, thermal and mechanical properties of glass-ceramic bond diamond composites improved with the addition of ZnS. The microstructure presented regular β-Spodumene crystal distribution in the composites. Furthermore, ZnS destroyed the glass network structure, which provided sufficient space for the crystallization of β-Spodumene, with the generation of Zn 2 SiO 4 decreased crystallization temperature. The optimal content of ZnS was 6 wt%, producing 76.52 MPa bending strength , 3.44 × 10 −6 °C −1 CTE and 16% porosity, whereas, excessive ZnS decreased composite properties.
研究领域:
材料科学
·
机械工程
✓ 已验证
产品关联
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.
研究领域:
材料科学
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能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
·
2021
·
IF 3.382
Yu Hao,Peng Li,Baohua Zhu,Yimin Zhang,Yuzong Gu
In order to modulate the nonlinear optical (NLO) properties of multi walled carbon nanotubes (MWCNTs) and make them applicable to ultrafast nonlinear optical devices, we fabricated a core satellite ZnS-Au nanostructure on the surface of MWCNTs via the solvothermal method. The structure and morphology of the MWCNTs-Au-ZnS product were characterized by means of the XRD, SEM and XPS, which showed that the ZnS-Au nanoassemblies were combined along with the MWCNTs through C S covalent bond and partial ionic bond. The optical nonlinearities of the MWCNTs-Au-ZnS system were investigated using the Z-scan technique under the excitation of 532 nm ps laser pulses and kinetically analyzed using the pump-probe transient absorption spectroscopy. The results showed that the saturation absorption (SA) coefficient and the third-order nonlinear susceptibility of the MWCNTs-Au-ZnS system were adjustable with the variation of the core-satellite structure. The intensity of the saturation absorption was tuned downward below that of the pure MWCNTs, while the susceptibility of the system was tuned upward above that of the pure MWCNTs, which were attributed to the combined action of two-photon absorption of ZnS, charge transfer in the system, trap states provided by Au and charge delocalization varying with the size. These tunable nonlinearities will expand the applications of the MWCNTs-Au-ZnS system in photonic devices.
研究领域:
材料科学
·
光学
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产品关联
DOI
高影响因子
Current Nanoscience
·
2015
·Vol. 11
·期 3
·360-365
·
IF 1.096
Cui Xia,Huang Wan Z.,Zhou Huan,Yin Hao Yong,Zheng Yi Fan,Song Xu Chun
In this study, a novel ZnS/ZnWO4 nanocomposite photocatalyst was synthesized through a facile hydrothermal synthesis method. The as-prepared samples were characterized by energy dispersive X-ray analysis (EDS), X-ray powder diffraction (XRD), transmission electron microscopy
(TEM), UV-vis diffuse reflectance spectroscopy (UV-vis DRS) and so on. The ZnS/ZnWO4 nanocomposite shows an enhanced photocatalytic activity for the degradation of rhodamine B (RhB) under simulated solar light. The results show that ZnS/ZnWO4 nanocomposite photocatalysts
have better photocatalytic activity than the single ZnWO4 or ZnS. In the case of ZnS compounding, ZnS/ZnWO4 photocatalyst led to the lower recombination ratios of photo-generated electron hole pairs and then higher photocatalytic performance. In addition, it has the potential
to become a useful technology for environmental cleanup without secondary pollution.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
ACS Applied Nano Materials
·
2025
·
IF 5.5
Zejiang Gao,Li Chen,Shaohong Li,Xingyu Pan,Yu Liu,Ge Gao,Bingsuo Zou
Metal halide perovskites have emerged as promising functional materials for high-performance photodetectors owing to their exceptional properties, including high-absorption coefficient, low-exciton binding energy, and near-unity photoluminescence quantum yields. However, their practical applications in photodetection remain constrained by intrinsic carrier recombination losses. Herein, we report the rational design of type-II CsPbBr3/ZnS heterostructured nanocrystals (NCs) through interfacial band engineering to address this challenge. Advanced characterization combining transmission electron microscopy, ultraviolet photoelectron spectroscopy, and density functional theory calculations confirms the formation of a staggered band alignment at the heterointerface. This unique electronic structure facilitates fast charge separation and inhibits carrier recombination compared to pristine CsPbBr3 NCs. Benefiting from the advantages of CsPbBr3/ZnS heterostructured NCs, we demonstrate a self-powered photodetector with excellent detection capability under 365 nm illumination: photosensitivity of 1.38 × 104, responsivity of 37.5 mA/W, and specific detectivity of 1.21 × 1012 Jones at zero bias. The interfacial engineering strategy presented in this work establishes a universal approach for developing high-efficiency perovskite optoelectronics with tailored charge transport dynamics.
研究领域:
材料科学
·
光电材料
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2013
·
IF 2.112
Lei Wang,Lixin Cao,Ge Su,Wei Liu,Chenghui Xia,Huajian Zhou
The synthesis and luminescent properties of water-soluble ZnSe:Cu/ZnS core/shell quantum dots (QDs) with different shell thickness are reported in this paper. X-ray powder diffraction (XRD) studies present that the ZnSe:Cu/ZnS core/shell QDs with different shell thickness have a cubic zinc-blende structure. The tests of transmission electron microscope (TEM) pictures exhibit that the QDs obtained are spherical-shaped particles and the average grain size increased from 2.7 to 3.8 nm with the growth of ZnS shell. The emission peak position of QDs has a small redshift from 461 to 475 nm with the growth of ZnS shell within the blue spectral window. The photoluminescence (PL) emission intensity and stability of the ZnSe:Cu core d-dots are both enhanced by coating ZnS shell on the surface of core d-dots. The largest PL intensity of the core/shell QDs is almost 3 times larger than that of Cu doped ZnSe quantum dots (ZnSe:Cu d-dots). The redshift of core/shell QDs compared with the core QDs are observed in both the absorption and the photoluminescence excitation spectra.
研究领域:
材料科学
·
光学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Green Energy & Environment
·
2024
·
IF 10.7
Yi-lei Li,Xu-jia Liu,Yun-biao Wang,Ying Liu,Rui-hong Liu,Hui-ying Mu,Ying-juan Hao,Xiao-jing Wang,Fa-tang Li
Adjusting the interfacial transport efficiency of photogenerated electrons and the free energy of hydrogen adsorption through interface engineering is an effective means of improving the photocatalytic activity of semiconductor photocatalysts. Herein, hollow ZnS/NiS nanocages with ohmic contacts containing Zn vacancy (V Zn -ZnS/NiS) are synthesized using ZIF-8 as templates. An internal electric field is constructed by Fermi level flattening to form ohmic contacts, which increase donor density and accelerate electron transport at the V Zn- ZnS/NiS interface. The experimental and DFT results show that the tight interface and V Zn can rearrange electrons, resulting in a higher charge density at the interface, and optimizing the Gibbs free energy of hydrogen adsorption. The optimal hydrogen production activity of V Zn -ZnS/NiS is 10,636 μmol h −1 g −1 , which is 31.9 times that of V Zn -ZnS. This study provides an idea for constructing sulfide heterojunctions with ohmic contacts and defects to achieve efficient photocatalytic hydrogen production.
研究领域:
材料科学
·
能源科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2017
·Vol. 10
·期 11
·1242
·
IF 2.654
Yangyang Xie,Chong Geng,Yiqun Gao,Jay Guoxu Liu,Zi-Hui Zhang,Yonghui Zhang,Shu Xu,Wengang Bi
In this report, to tackle the thermal fluorescent quenching issue of II-VI semiconductor quantum dots (QDs), which hinders their on-chip packaging application to light-emitting diodes (LEDs), a QD-ZnS nanosheet inorganic assembly monolith (QD-ZnS NIAM) is developed through chemisorption of QDs on the surface of two-dimensional (2D) ZnS nanosheets and subsequent assembly of the nanosheets into a compact inorganic monolith. The QD-ZnS NIAM could reduce the thermal fluorescent quenching of QDs effectively, possibly due to fewer thermally induced permanent trap states and decreased Förster resonance energy transfer (FRET) among QDs when compared with those in a reference QD composite thin film. We have demonstrated that the QD-ZnS NIAM enables QDs to be directly packaged on-chip in LEDs with over 90% of their initial luminance being retained at above 85 °C, showing advantage in LED application in comparison with conventional QD composite film.Keywords:quantum dots;nanosheet;assembly;thermal stability
研究领域:
材料科学
·
纳米技术
·
光电子学
✓ 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）