CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Qihuang Deng,Wei Xiong,Bingshuang Mao,Maolin Bo,Yefeng Feng
Increasing the dielectric constant of polymer/sulfide ceramic composites by using wide-bandgap semiconducting sulfide ceramic fillers like ZnS is difficult because of their low interface polarization. To increase the dielectric constant, in this study, ternary polymer-based composite films were designed and fabricated using a hybrid filler consisting of shell-like ZnS particles and core-like V 2 C MXene particles. First, V 2 C MXene with a multi-layered structure was synthesized from the simplest raw materials followed by the in-situ hydrothermal growth of ZnS particles around the V 2 C particles. Then, binary polymer/ZnS and ternary polymer/V 2 C–ZnS composites were fabricated, and their dielectric, conductive, and electrical breakdown properties were investigated. Finally, the effect of interfacial bonding between the V 2 C and ZnS phases was investigated by density functional theory calculations, and the contribution of V 2 C/ZnS interfacial bonding to the higher dielectric constant of the ternary composites than that of the binary composites was explained. The ternary composites exhibited balanced electrical properties suitable for energy storage applications. The ternary composite with 10 wt% hybrid filler loading exhibited a high dielectric constant of ~52, a low dielectric loss of ~0.11 at 100 Hz, and a high electrical breakdown strength of ~202 MV m −1 . This study paves the way for the facile fabrication of high-performance composite dielectrics for application in advanced capacitors.
研究领域:
材料科学
·
电气工程
✓ 已验证
产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2012
·
IF 2.098
Chang Shu,Bin Huang,Xiangdong Chen,Yan Wang,Xuequan Li,Li Ding,Wenying Zhong
Strong fluorescence and low cytotoxicity ZnSe/ZnS quantum dots (QDs) were synthesized by a facile aqueous phase route. It overcame the defects such as instability and low quantum yield of the quantum dots synthesized by early aqueous phase route. l -Glutathione (GSH) and 3-mercaptopropaonic acid (MPA) were used as mixture stabilizers to synthesize high quality ZnSe/ZnS QDs. The samples were characterized by X-ray diffraction (XRD), high resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectrometry (XPS) and their optical properties were investigated by using UV–vis spectrophotometer, fluorescence spectrophotometer (FL), IR spectrophotometer and confocal laser scanning microscope. The synthesized ZnSe/ZnS QDs illuminated blue fluorescence under ultraviolet lamp. Its water-soluble property is excellent and the fluorescence intensity of ZnSe/ZnS QDs almost did not change after 4 months at room temperature. The average diameter of ZnSe/ZnS nanocrystals is about 3 nm and quantum yield (QY) could reach to 70.6% after repeat determination. Low cytotoxicity was ensured by investigated SCG7901 and RAW264.7 cells. In comparison with cadmium based nanocrystals, ZnSe/ZnS QDs posed low cytotoxicity. The cells viability remained 96.7% when the QDs concentration was increased to 10 μmol/L. The results in vitro indicate that ZnSe/ZnS QDs-based probes have good stability, low toxicity and biocompatibility for fluorescence imaging in cancer model system.
研究领域:
材料科学
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生物学
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医学
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DOI
PubMed
高影响因子
Solar RRL
·
2023
·Vol. 7
·期 7
·2201093
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IF 7.9
Xiaohong Ma,Danyang Li,Jun Xie,Jian Qi,Huacheng Jin,Liuyang Bai,Hao Zhang,Feifei You,Fangli Yuan
The reduction of CO 2 to chemical fuel driven by solar energy can not only meet the growing demand for renewable energy, but also balance the carbon cycle in nature. However, the current photocatalysts have low CO 2 conversion due to their poor light capture ability, narrow light response range, and high recombination probability of photogenerated carriers. Herein, a heterogeneous photocatalyst of hollow structured ZnO/ZnS decorated with Pt nanoparticles is synthesized through the hydrothermal process and photodeposition method, showing excellent photocatalytic activity for CO 2 reduction in long-time stability and ≈100% CO selectivity, which can mainly contribute to natural enhanced light-capture ability of the hollow confined space due to multiple reflection and scattering of light in the cavity, thus improving separation efficiency of photogenerated charge carriers due to the type II junction constructed between ZnO and ZnS and the additional reaction active sites after decorating Pt nanoparticles in the surface of the hollow structure.
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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产品关联
DOI
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
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2024
·
IF 3.8
Jianpu Lin,Shengjie Zhang,Lingfeng Du,Baiquan Zhang,Xiongtu Zhou,Yongai Zhang,Chaoxing Wu
The wavelength tunable and environmentally friendly InP quantum dots are considered one of the most powerful alternatives to cadmium-based quantum dots, and the luminescent devices prepared with them also show great potential. There is still room for improvement in the synthesis methods and device applications of InP based quantum dots. In this work, we report one pot synthesis route for InP/ZnSe/ZnSeS/ZnS green QDs based on tris(dimethylamino)phosphine (DMP) phosphorus by using the strategy of multi shell coating and gradient heating to reduce surface defects of quantum dots. The shell structure, dosage, and growth temperature have all been taken into account in order to explore better performance of InP QDs. The synthesized green quantum dots have 86 % PLQY and a full width at half maximum of 36 nm. In addition, the synthesized green InP quantum dots are applied in AC QLED devices. The experimental results show that the luminescence intensity is affected by the driving voltage and frequency, which is similar to the working mode of non-carrier-injected emitting devices. And there is a matching value between the voltage and frequency.
研究领域:
材料科学
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纳米技术
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光电子学
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2020
·Vol. 49
·期 31
·10816-10823
·
IF 4.174
Huihui Song,Na Wang,Hao Meng,Yide Han,Junbiao Wu,Junli Xu,Yan Xu,Xia Zhang,Ting Sun
A facile synthetic route, by using rhombic dodecahedral zeolitic imidazolate framework-8 (ZIF-8) as the structure template, is devoted to fabricating the ZnS/ZnIn2S4 hybrid heterojunction; the compact heterostructure was produced by combining the sulfurization of ZIF-8 and the in situ precipitation of ZnIn2S4 in one pot. The resulting ZnS nanoparticles of about 100 nm were uniformly dispersed in the folds of flower-like ZnIn2S4, whose structure is beneficial for charge transfer at the heterointerface. The additional quantities of ZIF-8 are varied to find an optimum ratio of the two components to obtain the best photocatalytic activity. In the photocatalytic hydrogen generation irradiated by simulated solar light, all the ZnS/ZnIn2S4 hybrid photocatalysts displayed improved hydrogen production rates compared to single ZnS or ZnIn2S4, and the best hydrogen production rate of 453.4 μmol h−1 g−1 is obtained by ZnS/ZIS-20, whose value is approximately 4 times higher than that of single ZnIn2S4. The electrochemical properties of the ZnS/ZnIn2S4 hybrid photocatalysts were measured to explore the charge transfer mode at the interface, and the band structure and enhanced photocatalytic hydrogen generation mechanism have been proposed. The excellent recycling properties of hydrogen production indicated the prospective applications of this kind of ZIF-derived metal sulfide in photocatalytic reactions.
研究领域:
材料科学
·
光催化
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CRYSTENGCOMM
·
2020
·Vol. 22
·期 20
·3474-3481
·
IF 3.117
Xiaopeng Zhou,Jiejun Ren,Xuan Dong,Xicheng Wang,Takatoshi Seto,Yuhua Wang
As a representative of III–V semiconductor materials, InP/ZnS quantum dots are regarded as the star material in the field of light-emitting devices due to their low toxicity and suitable luminescence range. However, there are still some major problems in the preparation process of InP/ZnS QDs, such as phosphine precursors are expensive and difficult to preserve, the nucleation time of short wavelength InP/ZnS QDs is too short and the size distribution is too large. In this paper, we'll replace the traditional tris(trimethylsilyl)phosphine with tris(diethylamino)phosphine as a cheaper phosphine precursor and propose a novel and convenient method for adjusting the luminescence wavelength of InP/ZnS QDs. Different from the traditional method to adjust the emission wavelength by changing the nucleation time, the emission wavelength of InP/ZnS QDs was regulated by changing the number of initially formed cores. Zeolites provide a nucleation site for the InP cores. InP/ZnS QDs that emit between 522 nm and 589 nm were obtained. Moreover, the obtained InP/ZnS QDs have good monochromaticity, and the minimum half-width (half-full width) is up to 48 nm. This method provides a new way to adjust the size of quantum dots with good performance.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS LETTERS
·
2022
·
IF 3.574
C.C. Wang,J. Luo,Z.Z. Liu,S.H. Sun,Y. Zhu,Y.M. Hu
Nanoscale Ag 8 SnS 6 (ATS) and ZnS@ATS heterogeneous composites were synthesized by a stepwise heating method. The as-prepared ATS nanoparticles were mainly irregular polygons with crystal size ranging from 35 to 120 nm, and transformed to cotton shape particles when nano ZnS was added during the synthesis process. Photocatalytic properties of the as-prepared ATS, ZnS and ZnS@ATS were investigated using Methylene Blue solution as the target degradation. It is resulted that the rate constant of the catalysts first increases and then decreases with the content of ZnS in ZnS@ATS composites. In the optimal case of 0.5 mmol ZnS@ATS, rate constant of 0.7012 h −1 was achieved which is 7.3 times that of ZnS and 2.3 times that of ATS. The improvement mainly comes from enhancing separation and transfer efficiency of photogenerated electron-hole pairs at the grain boundaries of ZnS@ATS.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2025
·
IF 5.1
Lizhao Nie,Linqi Chen,Jingzhou Li,Yijing Wang,Xiaoxia Wang,Long Zhang,Hongxing Dong,Anlian Pan
Copper indium selenide (CISe) quantum dots (QDs), a class of narrow bandgap and environmentally friendly QDs, have been developed rapidly for application in the fields of biomedicine, solar cells, and telecommunications. However, synthesizing CISe QDs that emit beyond 800 nm while maintaining high photoluminescence quantum yields (PLQY) remains a significant challenge. Herein, we employed a hot injection solution method to synthesize high-quality core–shell structure Zn:CuInSe2/ZnS QDs by adjusting the stoichiometric ratio of the CISe core and doping with Zn2+. The fabricated QDs exhibit a high PLQY of 62.7% at an emission wavelength of 810 nm with excellent photochemical stability and a large Stokes shift (150 nm). This can be attributed to pre-doping, which suppresses the cation exchange between Zn2+ and Cu+ or In3+ during the shelling process, and the passivation effects of ZnS on surface defects of the QDs. Furthermore, we demonstrate their application by using a home-built optical wireless communication (OWC) test platform, and the prepared QDs exhibit a modulation bandwidth of 3.23 MHz. With a bit error rate (BER) below the forward error correction (FEC) threshold of 0.0038, the system is capable of achieving a maximum data transmission rate of 14 Mbps. The synthesized high-efficiency PLQY Zn:CuInSe2/ZnS QDs could be expected to promote the development of near-infrared (NIR) wireless communications.
研究领域:
材料科学
·
光电子学
·
通信工程
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产品关联
DOI
高影响因子
CATALYSIS TODAY
·
2020
·
IF 5.825
Yichen Yang,Xin Chen,Yufeng Pan,Huaibing Song,Bin Zhu,Yan Wu
Photocatalytic hydrogen production is recognized as a prospective technology for energy conversion to alleviate the energy shortage. Hence, we propose a convenient method to synthesize two-dimensional (2D) ZnS-propylamine (pa) hybrid complex materials with traditional solvothermal method, demonstrating prominent photocatalytivity under visible light irradiation. Meanwhile, the improvement of hydrogen production has been further investigated by controlling different in-situ ultrasonic times. The optimized hydrogen generation obtained from ZnS(pa) x was up to 1828 μmol/g under 4 h visible light irradiation. The high performance could be contributed by the inorganic-organic coordination effect on optimizing the morphology and structure, which enlarge reaction sites and accelerate carriers migration of the material. This work represents an effective approach to promote and optimize the traditional wide bandgap semiconductors for enlarging visible light photocatalytic performances.
研究领域:
材料科学
·
能源转换技术
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2021
·
IF 5.909
J.C. Murillo-Sierra,A. Hernández-Ramírez,Zong-Yan Zhao,Angel Martínez-Hernández,M.A. Gracia-Pinilla
Heterogeneous photocatalysis has been considered as a green and sustainable alternative for water decontamination where the key step is the nanomaterials design to enhance the photocatalytic process. Therefore, in this study the photocatalytic degradation of an emerging contaminant as the tetracycline antibiotic in aqueous solution, was investigated under UV–Vis irradiation by using the WO 3 /ZnS photocatalyst. The coupled catalyst was synthesized by hydrothermal method and by varying the WO 3 weight ratio (5, 10 and 20 wt%) with respect to the ZnS. The WO 3 /ZnS photoactivity for tetracycline degradation was greatly enhanced when both semiconductors were coupled to form a highly efficient direct Z-scheme. The highest degradation percentage was reached using the catalyst t WO 3 (5%)/ZnS, which completely degraded the pollutant within 90 min, and the determination of total organic carbon (TOC) removal indicated a high mineralization degree. Photoelectrochemical studies showed that WO 3 (5%)/ZnS exhibited the highest separation of e − / h + pairs and the highest transfer efficiency. The improvement of the electron-hole separation in combination with the band alignment analysis, explained the intrinsic mechanism which corresponded to the direct Z-scheme photocatalytic system.
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
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2014
·Vol. 14
·期 7
·5426-5429
·
IF 1.339
Yang Peilun,Zhu Baocun,Zhao Jie,Yu Haiqin,Yan Liangguo,Wei Qin,Du Bin
Currently, growing attention has been paid to the sensitive determination and removal of Cu2+ because excessive levels of Cu2+ could do harm to organisms. Herein, a novel diethanolamine-modified magnetic fluorescent Fe3O4@ZnS nanoparticle
(MFNP) for simultaneous detection and removal of Cu2+ was designed and synthesized through dithiocarbamate linkage strategy. The characterization of MFNP was confirmed by transmission electron microscope (TEM), infrared (IR) and emission spectra. The results showed
that MFNP could quantificationally detect Cu2+ with high sensitivity and selectivity under a broad pH range (pH 4.5–9). The removal of Cu2+ was achieved by the aggregation-induced sedimentation (AIS) strategy and by external magnetic field.
研究领域:
分析化学
·
环境科学
·
纳米技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）