JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
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2016
·Vol. 16
·期 1
·246-252
·
IF 1.338
Jiang Wei,Chen Binhua,Wu Juan,Xu Shanshan,Tian Renbing
The thermo-sensitive magnetic fluorescent trifunctional nanocomposite (Fe3O4/ZnS@PNIPAM) has been synthesized via a facile route. The obtained biocompatible nanocomposite was composed of monodisperse heterostructural Fe3O4/ZnS core and a thermo-sensitive
poly(N-isopropyl acrylamide) (PNIPAM) shell. Fe3O4/ZnS acted as magnetic response and fluorescence luminous body, PNIPAM acted as drug loaded platform which can adsorb and release drug controllably. Fe3O4/ZnS@PNIPAM was characterized and all
of the results showed that it had excellent magnetic response, photostability and thermo-sensitivity. Moreover, the drug release studies in vitro showed that the release rate increased with increasing temperature. MTT assays in model HepG2 cells demonstrated that Fe3O4/ZnS@PNIPAM
was practically non-toxic. Thus, our results revealed that Fe3O4/ZnS@PNIPAM would be used in biomedical fields such as targeted drug delivery, as well as cancer diagnosis and treatment in the nearly future.
研究领域:
生物医学工程
·
材料科学
·
药理学
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DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 49
·38810-38817
·
IF 3.84
Yeping Li,Jingbo Xu,Yun Xu,Liying Huang,Junli Wang,Xiaonong Cheng
The objective of the study is to describe a new approach of combining quantum dots into chitosan as an anti-cancer drug carrier. Novel chitosan–ZnSe/ZnS (CS–ZnSe/ZnS) nanoparticles were synthesized by a one-step ionic gelation technique, with ZnSe/ZnS quantum dots (ZnSe/ZnS QDs) as cross-linking agent and for fluorescent labeling. The approach not only avoids the use of emulsifiers and chemical cross-linking agents but also prevents the possibility of damage to drugs. The fluorescent CS–ZnSe/ZnS nanoparticles were about 100–500 nm in size and stable in a physiological environment. Low cytotoxicity was ensured by investigation with mouse lung carcinoma cells. The cell viability remained 99% when the concentration of CS–ZnSe/ZnS nanoparticles increased to 200 μg mL−1. In the in vitro drug release experiment, 5-fluorouracil (5-Fu) loaded within CS–ZnSe/ZnS nanoparticles had more preferable sustained-release performance and longer equilibrium time compared with that of the pure 5-Fu. The fluorescent CS–ZnSe/ZnS nanoparticles are expected to be used for biological fluorescent labeling and drug carriers.
研究领域:
生物材料学
·
纳米医学
·
药剂学
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高影响因子
NANOTECHNOLOGY
·
2020
·Vol. 31
·期 49
·495406
·
IF 3.551
Tianyu Shi,Chenyuan Zhao,Chuan Yin,Haihong Yin,Changqing Song,Lin Qin,Zhiliang Wang,Haibao Shao,Ke Yu
Constructing sulfur hosts with high electronic conductivity, large void space, strong chemisorption, and rapid redox kinetics is critically important for their practical applications in lithium–sulfur batteries (LSBs). Herein, by coupling ZnS quantum dots (QDs) with carbon nanotubes (CNTs), one multifunctional sulfur host CNT/ZnS-QDs is designed via a facile one-step hydrothermal method. SEM and TEM analyses reveal that small ZnS-QDs (<5 nm) are uniformly anchored on the CNT surface as well as encapsulated into CNT channels. This special architecture ensures sulfur direct contacting with highly conductive CNTs; meanwhile, the catalytic effect of anchored ZnS-QDs improves the chemisorption and confinement to polysulfides. Benefiting from these merits, when used as sulfur hosts, this special architecture manifests a high specific capacity, superior rate capability, and long-term cycling stability. The ZnS-QDs dependent electrochemical performance is also evaluated by adjusting the mass ratio of ZnS-QDs, and the host of CNT/ZnS-QDs 27% owns the optimal cell performance. The specific capacity decreases from 1051 mAh g−1 at 0.2 C to 544 mAh g−1 at 2.0 C, showing rate capability much higher than CNT/S and other CNT/ZnS-QDs/S samples. After 150 cycles, the cyclic capacity at 0.5 C exhibits a slow reduction from 1051 mAh g−1 to 771 mAh g−1, showing a high retention of 73.4% with a coulombic efficiency of over 99%. The electrochemical impedance spectroscopy analyses demonstrate that this special architecture juggles high conductivity and excellent confinement of polysulfides, which can significantly suppress the notorious shuttle effect and accelerate the redox kinetics. The strategy in this study provides a feasible approach to design efficient sulfur hosts for realizing practically usable LSBs.
研究领域:
材料科学
·
能源存储与转换
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高影响因子
RSC Advances
·
2017
·Vol. 7
·期 43
·26930-26934
·
IF 3.108
Wei Liu,Huanhuan Li,Yanli Wei,Chuan Dong
A label free phosphorescence sensing platform for trypsin was developed employing Mn doped ZnS quantum dots (Mn-ZnS QDs) as the phosphorescence probe. Mn-ZnS QDs can emit strong room temperature phosphorescence. Upon addition of Cytochrome c (Cyt c), a hybrid complex between Mn-ZnS QDs and Cyt c was formed, and consequently, quenched the phosphorescence of Mn-ZnS QDs. In the presence of trypsin, Cyt c was hydrolyzed into small fragments, and accordingly, the quenched phosphorescence of Mn-ZnS QDs went back and high phosphorescence intensity was observed. As such, based on the phosphorescence signal changes of the system, a label free turn-on phosphorescence sensing platform was fabricated. Factors affecting the determination of trypsin including the concentration of Mn-ZnS QDs, reaction time, temperature and pH effect were comprehensively explored. Under the optimal experimental conditions the restored phosphorescence of the sensing system displayed a response for trypsin in the range of 0.88–15.6 μg mL−1 with a detection limit of 42 ng mL−1. Additionally, the sensing platform was successfully applied for the determination of trypsin in human serum samples with satisfactory recovery.
研究领域:
分析化学
·
生物传感器
·
纳米技术
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高影响因子
LUMINESCENCE
·
2015
·Vol. 30
·期 7
·1064-1070
·
IF 1.518
Wei Bian,Fang Wang,Hao Zhang,Lin Zhang,Li Wang,Shaomin Shuang
Core-shell CdTe/ZnS quantum dots capped with 3-mercaptopropionic acid (MPA) were successfully synthesized in aqueous medium by hydrothermal synthesis. These quantum dots have advantages compared to traditional quantum dots with limited biological applications, high toxicity and tendency to aggregate. The concentration of Cu 2+ has a significant impact on the fluorescence intensity of quantum dots (QDs), therefore, a rapid sensitive and selective fluorescence probe has been proposed for the detection of Cu 2+ in aqueous solution. Under optimal conditions, the fluorescence intensity of CdTe/ZnS QDs was linearly proportional to the concentration of Cu 2+ in the range from 2.5 × 10 –9 M to 17.5 × 10 –7 M with the limit of 1.5 × 10 –9 M and relative standard deviation of 0.23%. The quenching mechanism is static quenching with recoveries of 97.30–102.75%. Copyright © 2015 John Wiley & Sons, Ltd.
研究领域:
分析化学
·
纳米材料
·
环境监测
·
生物传感器
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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 Physical Chemistry C
·
2023
·
IF 3.7
Li Fu,Zerui Liu,Pengjie Dong,Yingshu Guo
Screening a novel electrochemiluminescence (ECL) system and reducing electrochemical interference by lowering the ECL potential are crucial to ECL evolution. Herein, an ECL system is explored with different hydrazine compounds as coreactants and ternary CuInS2/ZnS nanocrystals (CIS/ZnS NCs) as a luminophore, demonstrating that hydrazine compounds with varied structures would assuredly affect the ECL triggering potential and efficiency. Electro-oxidized hydrazine-based coreactants containing a symmetrical structure and −N–N single bonds with strong reducibility could produce an efficient electron transfer recombination path with electro-oxidized CIS/ZnS NCs, which eventually generate efficient and low-triggering-potential ECL performance; otherwise, the hydrazine compounds with a double bond, such as −C═N or −C═O, or strong electronegative atoms would reduce the ECL efficiency and increase the ECL triggering potential, which result from double bonds or strong electronegative atoms of hydrazine compounds hindering the protonation of coreactants and then delaying the electron–hole recombination process. The structure of hydrazine-based coreactants with a −C═S double bond would competitively bond with the Cu element within CIS/ZnS NCs, contributing to the blank ECL with CIS/ZnS NCs as the luminophore. Furthermore, CIS/ZnS NCs exhibit two additional low hole injected processes under alkaline conditions through exploration of the differential pulse voltammetry (DPV) nature from CIS/ZnS NCs. The ultralow-triggering-potential of CIS/ZnS NCs around 0.11 V could be achieved by adjusting the hole injection processes of NCs and selecting pasoniazide as the coreactant, which is extremely below any previously reported ECL system. This work contributes to a deeper understanding of the ECL mechanism.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Ting Sun,Ping Gao,Yuqing He,Zhiren Wu,Jun Liu,Xinshan Rong
The development of an efficient catalyst that can use solar energy for NH 3 production is of great significance in solving the environmental and energy crisis caused by the traditional ammonia synthesis process. In this work, a dual Z-scheme tubular carbon nitride/zinc sulfide/zinc indium sulfide ternary composited photocatalyst (TCN/ZnS/ZnIn 2 S 4 ) with excellent nitrogen photofixation performance under visible light was prepared by self-assembly and hydrothermal methods . The crystal structure studies confirmed that tubular carbon nitride (TCN) had more active sites that could promote N 2 adsorption. The photochemical studies proved that the double charge transfer channel provided by the dual Z-scheme heterojunction could improve the efficiency of electron-hole separation and achieve excellent photocatalytic nitrogen fixation . The ammonia production rate of the TCN/ZnS/ZnIn 2 S 4 catalyst was up to 136.56 μmol/L, and it also has good stability and reusability. This work provides new insight into the development of Z-scheme heterojunction photocatalysts with green and efficient nitrogen fixation.
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DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Jianrong Guo,Juan Wu,Junhui He,Yan Xue
As cadmium ions (Cd 2+ ) pose a serious threat to environment and human health, it is significant to develop portable, fast-response and sensitive Cd 2+ sensors for both real-time and on-site collection of such critical information. In this study, nearly monodisperse ZnS nanoparticles (NPs) were prepared and used to recognize, enrich and detect Cd 2+ ions. ZnS NPs demonstrated fast adsorption kinetics towards Cd 2+ ions (removing 99.3 % of Cd 2+ in 12 min), surpassing previously reported multiple Cd 2+ adsorption materials. Upon adsorbing Cu 2+ and Cd 2+ ions via substitution reaction, ZnS NPs gain strong peroxidase activity, and demonstrate the ability to selectively detect Cu 2+ and Cd 2+ ions among common metal ions . By further conjugating with our previous HSnS NFs (Hollow SnS nanoflower) nanosensor to eliminate the interference of Cu 2+ , the ZnS NPs nanosensor could selectively detect Cd 2+ ions with recoveries above 80 %. The ZnS NPs nanosensor can cover a wide range of Cd 2+ concentration from 0.5 to 100 μg L −1 with an extremely low detection limit of 0.38 μg L −1 . When coupling to a portable RGB sensor, as low as 0.5 μg L −1 Cd 2+ ions could be reached on-site for river water, giving an outstanding recovery of 99.4 %. The current results provide a new avenue to the on-site detection of Cd 2+ ions, and would doubtlessly contribute to the future construction of portable and intelligent sensor arrays towards complex environmental samples.
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高影响因子
Journal of Materials Chemistry A
·
2021
·Vol. 9
·期 12
·7977-7990
·
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.
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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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DOI
PubMed
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2021
·
IF 3.196
Dandan Liu,Haiou Liang,Tong Xu,Jie Bai,Chunping Li
Through a simple fiber template method, we combined the n-type TiO 2 catalysts with n-type ZnS@ZnO heterojunction to synthesize a high-efficiency ternary hollow TiO 2 -ZnS@ZnO n-n heterojunction. Under these modified conditions, the composite catalysts could broaden the visible light absorption range of the pure TiO 2 , and both the hollow structure and heterojunction could inhibit the recombination ability of the photon-generated carriers. Optical and Electrochemical characterizations indicated that the photogenerated electrons and holes can be separated efficiently and the composites have visible light absorption. The experimental results show that, the removal efficiency of the optimal composites for photocatalytic degradation of Tetracycline Hydrochloride (TC) under visible light ( λ ≥ 420 nm) was 86.67% due to the ·O 2 − free radicals of efficient production, it exhibited 5 times higher degradation rate towards Tetracycline Hydrochloride (TC) than pure TiO 2 . The composites with high photocatalytic activity could also effectively degrade Methylthionine Chloride (MB), Xylenol Orange (XO), Acid Red 18 and Rhodamine B (RhB) under the driving of visible light. This work provided a simple method to construct ternary heterojunction, and also provided a promising strategy to solve the environmental pollution problem in the future.
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高影响因子
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