Journal of Materials Chemistry B
·
2019
·Vol. 7
·期 17
·2835-2844
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IF 5.047
Hui Zhang,Youshen Wu,Zhenhai Gan,Yuexuan Yang,Yiming Liu,Peng Tang,Daocheng Wu
Accurate and sensitive temperature sensing is of great importance for studying biological activities in cells and tissues. Due to the complexity of the microenvironments, most of the existing thermometry systems cannot meet the needs of accurate intracellular and in vivo temperature sensing with high-sensitivity and low-toxicity. After investigation, we found that the fluorescence intensity of CuInS2/ZnS quantum dots (QDs) is significantly temperature dependent, and these QDs can be used for intracellular and in vivo temperature sensing after being encapsulated by amphiphilic micelles (QD-micelles). These QD-micelles have a size of approximately 10.1 ± 2.5 nm and an emission band of approximately 650 nm with intense photoluminescence (PL). Meanwhile, its high thermal sensitivity of 2% °C−1 at near-room temperature is insensitive to solution pH, ionic strength, and protein concentration. Even at a concentration of 300 μg mL−1, our QD-micelles do not exert cytotoxic effects on HeLa and PC-3 cells. Similar to being dispersed in water, the QD-micelles continue to exhibit a high thermal sensitivity of 2.0% °C−1 intracellular and 2.1% °C−1 in tumor tissues, and the PL intensity (I) and temperature (T) over the physiological temperature range have a good linear correlation. Therefore, they have considerable potential in biomedical applications.
研究领域:
生物医学工程
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纳米医学
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分子生物学
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DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2021
·Vol. 9
·期 12
·7977-7990
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IF 12.732
Pan Li,Lingju Guo,Shuangming Chen,Gan Luo,Shuang Zhu,Yanjie Wang,Li Song,Tao He
Vacancy engineering has attracted intensive attention owing to its great influence on the performance of photocatalysts. So far it still remains a big challenge to controllably modulate various vacancies co-existing in a photocatalyst and unveil the resultant influence mechanism. Herein, the model catalysts of ZnS nanoplates with vacancy defects of VS and VZn–VS–VZn are successfully prepared via a facile annealing approach and are systematically investigated by various techniques. The ZnS nanoplates with more VS defects show much higher photoreduction activity than those with more VZn–VS–VZn defects. The detailed mechanism is elucidated based on the influence of different vacancy defects on the adsorption and activation of the reactants and desorption of the reduction products, as well as on the separation of charge carriers. The reason that ZnS with different majority defects exhibits different photoreduction selectivity is explained according to the differences in the adsorption/desorption among CO2, H2O, H2 and CO.
研究领域:
材料科学
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光催化
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能源转换
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产品关联
DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2020
·
IF 3.306
Shuguang Li,Zhiyu Liu,Chunxiao Lu,Zhihui Qu,Congcong Piao,Jianhe Tang,Dawei Fang,Jun Wang
The use of co-catalysts can observably enhance photocatalytic hydrogen production activity. In this work, a novel visible-light driven photocatalyst, (MoSe 2 -RGO)/(Er 3+ :Y 3 Al 5 O 12 /ZnS)/RuO 2 nanocomposite, is prepared for the first time by loading Er 3+ :Y 3 Al 5 O 12 , MoSe 2 -RGO and RuO 2 on the surface of ZnS nanoparticles. Er 3+ :Y 3 Al 5 O 12 as an effective visible-to-ultraviolet up-conversion luminescence agent can provide the ultraviolet-light to activate wide band-gap ZnS. MoSe 2 -RGO and RuO 2 , acting as conduction band co-catalyst and valence band co-catalyst, respectively, can effectively separate the photo-generated carriers and supply more reactive sites. The activities of the photocatalysts were assessed via photocatalytic hydrogen production in Na 2 S and Na 2 SO 3 aqueous solution under 300 W xenon lamp irradiation. In addition, the visible-light irradiation time and used times of the prepared samples as influence factors on the photocatalytic hydrogen production were also investigated. It was easily found that the prepared (MoSe 2 -RGO)/(Er 3+ :Y 3 Al 5 O 12 /ZnS)/RuO 2 nanocomposite shows fairly high activity in photocatalytic hydrogen production, compared with single ZnS photocatalyst. It was mainly attributed to the excellent up-conversion luminescence property of Er 3+ :Y 3 Al 5 O 12 and the efficient separation of photo-generated electrons and holes caused by MoSe 2 -RGO and RuO 2 . This research may pave an effective way for photocatalytic hydrogen production utilizing solar light.
研究领域:
材料科学
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能源化学
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纳米技术
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产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 44
·21065-21077
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IF 3.925
Zhenlu Liu,Jing Xu,Jiandong Wu,Ye Liu,Lijun Ma,Linying Hu
Photocatalysis is one of the most promising methods to solve the problems of solar energy conversion and sustainable fuel production. Among them, the semiconductor electronic transition to produce hydrogen is the most critical research topic in the field of photocatalysis. ZnS and Ag2Mo2O7 monomers were prepared by the hydrothermal method. The S-scheme heterojunction was formed by electrostatic adsorption of the two materials. The S-scheme heterojunction can improve the separation rate of photogenerated carriers through the built-in electric field so that the hydrogen production rate of the system can reach a maximum of 871.9 μmol g−1 h−1. The system showed a good photoelectric response according to UV-Vis DRS and electrochemistry studies and excellent hydrogen evolution performance. In this study a DFT simulation of the heterojunction interface formed by the system was also carried out, and the relative size of the surface work function indicated the transfer direction and path of electrons.
研究领域:
材料科学
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能源科学
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化学工程
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产品关联
DOI
高影响因子
Molecular BioSystems
·
2011
·Vol. 7
·期 8
·2452-2458
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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
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纳米生物学
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产品关联
DOI
PubMed
高影响因子
CATALYSIS LETTERS
·
2017
·Vol. 147
·期 7
·1631-1639
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IF 2.799
Zhang Zhengwei,Xiao An,Yan Kun,Liu Yanhua,Yan Zhengyu,Chen Jianqiu
Abstract Herein, the CuInS 2 /ZnS/TGA quantum dots (QDs) were prepared by the oil phase reaction containing thioglycolic acid (TGA) as a functional modification agent under a nitrogen atmosphere. The CuInS 2 /ZnS/TGA QDs using as the photocatalysts exhibited high photocatalytic activity for the degradation of Rhodamine B (RhB) under ultraviolet irradiation. The photocatalytic conditions were optimized to degrade RhB with superior performances, including the initial RhB and CuInS 2 /ZnS/TGA QDs concentrations, solution pH values and ultraviolet light intensities. Furthermore, the kinetic equations of photocatalytic reaction and possible photocatalytic degradation mechanism were investigated. The results indicated that it belongs to the typical first order kinetic in accordance with the Langmuir–Hinshelwood mechanism, and the electrons and holes on the surface of the CuInS 2 /ZnS/TGA microspheres are the main acting forces during the RhB photocatalytic degradation. Graphical Abstract
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
Journal of Water Process Engineering
·
2025
·
IF 6.7
Suiying Dong,Ying Yang,Amir Zada,Shu-yuan Liu,Kezhen Qi
AgInS 2 quantum dots and ZnS photocatalytic materials were prepared using low temperature liquid phase and solvothermal methods, followed by the formation of their composites (AgInS 2 /ZnS) of different proportions with the aid of grinding method. The catalysts were characterized by various morphological and structural analyses such as scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), ultraviolet-visible diffuse reflectance spectroscopy (UV-DRS) and fluorescence spectroscopy (PL), etc. The experimental results show that the optical characteristics of ZnS can be improved by loading AgInS 2 . To evaluate the performance of the catalysts, tetracycline was selected as the target toxin, and its degradation was evaluated with AgInS 2 /ZnS materials. The results show that when the amount of AgInS 2 was 5%, AgInS 2 /ZnS exhibited the most excellent degradation performance. Under the irradiation of the simulated solar light, the catalyst removed 46% of tetracycline (40 mg·L −1 ) in 120 min. Compared with the bare ZnS, the degradation rate of AgInS 2 /ZnS composite was significantly improved. The mechanism of tetracycline degradation by composites was verified through the experiments of energy band structure analysis, active species capture, photocurrent and electrochemical impedance and photoluminescence. The effects of pH and common interfering ions on the degradation of the antibiotic were also explored. The ecological risk of the photocatalytic degradation of tetracycline by composites was predicted. Generally speaking, the prepared AgInS 2 /ZnS material showed excellent photocatalytic degradation performance, and it is a new catalyst with great potential.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Danyang Li,Hongpeng Zhang,Songze Xie,Hao Zhang,Huan Wang,Xiaohong Ma,Dawei Gao,Jian Qi,Feifei You
It is a promising strategy to effectively promote “carbon neutrality” by reducing CO2 to small energy molecules through photocatalysis technology. However, due to low light utilization and recombination of photogenerated carriers, photocatalysts usually have low activity and low selectivity for products. Herein, a hollow spherical ZnS/ZnO heterojunction with a spatial confinement effect photocatalyst was synthesized toward CO2 photoreduction through preciously controlling the nano-/microstructure. The local lattice distortions were introduced into the surface of the hollow ZnS/ZnO microsphere, which activated lattice oxygen and provided additional active reaction sites. Furthermore, the heterojunction constructed between ZnS and ZnO interfaces facilitated the separation of photoinduced charge carriers. Combined with the natural advantage of enhanced light capture and absorption for a hollow confined structure, as a result, the systemic design in the electronic and confined structures for the photocatalyst has brought an excellent CO2 reduction performance with a CO yield rate as high as 35.85 μmol g–1h–1 and durability under a 300 W Xe lamp irradiation without any sacrificial agent and cocatalyst.
研究领域:
材料科学
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环境科学
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产品关联
DOI
PubMed
高影响因子
Lubricants
·
2023
·Vol. 11
·期 7
·280
·
IF 3.5
Yiping Sun,Cheng Jiang,Qin Zhao,Xiaobo Wang,Wenjing Lou
The content of Cu2+in lubricants is an essential indicator for determining the quality of the lubricant and predicting mechanical failure. Finding an effective and sensitive method for detecting Cu2+in lubricants is of great importance in oil monitoring. In this work, AgInS2(AIS) and AgInS2-ZnS (ZAIS) nanoparticles (NPs) were synthesized by a simple one-step approach via in-situ surface modification by oleylamine. The as-synthesized AIS and ZAIS NPs exhibit good dispersion stability in various apolar media. The photoluminescence (PL) of AIS and ZAIS NPs as lubricating additives could reflect and monitor the lubrication state of steel-copper pairs due to the quenching effect of Cu2+from the friction process. With an optimum concentration of 0.5 wt% in paraffin oil, the friction coefficient of the AIS and ZAIS NPs at 100 N was decreased by 56.8 and 52.1% for steel-steel contacts, respectively. ZAIS was observed to be more effective than AIS in improving anti-wear (AW) and extreme pressure (EP) properties, with a load-bearing capacity of up to 1100 N. Characterization of the wear tracks by SEM and XPS indicates that a tribofilm composed of metal sulfides and oxides was formed during the lubricating process. This work not only reveals AIS and ZAIS NPs as a new class of promising candidates for lubricating additives but also unveils their potential for monitoring lubricant conditions and exploring lubricant service life.Keywords:AgInS2;AgInS2-ZnS;lubricant additive;friction and wear;photoluminescence
研究领域:
材料科学
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机械工程
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DOI
高影响因子
Analytical Methods
·
2019
·Vol. 11
·期 19
·2605-2610
·
IF 2.378
Jiajia Xi,Hao Wang,Bihong Zhang,Xiaopeng Hu,Faqiong Zhao,Baizhao Zeng
A type I core/shell structured Bi2S3@ZnS photocatalyst was synthesized by an electrostatic interaction mechanism and used for the photoelectrochemical detection of Cu2+. The Bi2S3@ZnS composite showed excellent photoelectrochemical activity and stability due to the high photoelectrochemical activity of Bi2S3 and the anti-photocorrosion function of the ZnS shell. In addition, the ZnS shell also provided a transfer platform for the photogenerated holes through its acceptor states (i.e. VZn and IS) and suppressed the recombination of photogenerated carriers. The photocurrent signal of the obtained Bi2S3@ZnS/ITO electrode was much higher than that of pure Bi2S3 under visible-light irradiation. When it was used for the photoelectrochemical sensing of Cu2+, a wide detection range (0.003–30.0 μM) and a low detection limit (0.001 μM) were observed. The sensor also displayed high stability and acceptable selectivity. It was applied to detect real samples and good results were achieved.
研究领域:
材料科学
·
分析化学
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产品关联
DOI
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.
研究领域:
材料科学
·
光学
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产品关联
DOI
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2022
·Vol. 51
·期 7
·3843-3850
·
IF 2.047
Wang Q. Y.,Wu Z. F.,Zhang M.,Qin Z. J.,Wang L.,Zhong F. R.,Duan H. M.
To realize the resource utilization of waste mask fibers (MF), a layer of ZnS nanoparticles was grown on MF by a one-step hydrothermal method, and a MF/ZnS sensor was successfully prepared. This is the first time that resource utilization of MF has been combined with the development of a high-performance gas sensor. The MF/ZnS sensor showed high sensitivity and recoverability to target vapors at room temperature. Compared with ZnS powder loaded on a ceramic substrate, the MF/ZnS composite responses to four analytes have been improved by 8.4~35.2 times. In addition, the time for the MF/ZnS sensor to complete one response–recovery cycle for all four analytes was less than 30 s. This should be attributed to the high gas permeability of the MF substrate, which made the ZnS particles loaded on the MF more fully exposed to contact with the target vapors. This work not only provides a simple and low-cost method to optimize the sensing performance of gas sensors but also provides a new way for the resource utilization of MF. Graphic Abstract
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）