Analytical Methods
·
2021
·Vol. 13
·期 12
·1517-1526
·
IF 2.896
Ziang Guo,Xiaowei Huang,Zhihua Li,Jiyong Shi,Xiaodong Zhai,Xuetao Hu,Xiaobo Zou
This paper describes a near-infrared quantum dot (CuInS2 QD)/antibiotic (vancomycin) nanoparticle-based assay for the Staphylococcus aureus and iron(III) detection. CuInS2 QDs with good biological tissue permeability and biocompatibility are combined with vancomycin through covalent interaction to form a detection system for two harmful factors. The detection principle of Staphylococcus aureus is mainly the fluorescence quenching caused by the accumulation of CuInS2@Van QDs on the surface of Staphylococcus aureus. The detection principles of the iron(III) ion are mainly ascribed to the aggregation of quantum dots and the transfer of charges, which cause the fluorescence signal to change. The linear range of S. aureus and the Fe3+ ion is 103 to 108 CFU mL−1 and 10–90 μM, respectively. Their detection limits are 665 CFU mL−1 and 3.5 μM, respectively. The procedure was validated by the quantitation of Staphylococcus aureus and iron(III) in spiked samples, and was found to demonstrate the feasibility of this method.
研究领域:
生物医学
·
分析化学
✓ 已验证
DOI
高影响因子
OPTICAL MATERIALS
·
2022
·
IF 3.754
Zhuobao Hong,Weihao Ye,Junjian He,Jie Luo,Linliang Yu,Xiaotang Liu
A simple sol-gel method was used to synthesize a hybrid nanostructure which can achieve the switching of dual-modal luminescence of NaYF 4 :Yb 3+ ,Er 3+ @CuInS 2 /ZnS. With 980 nm excitation, the nanoparticles exhibit red emissions, and exhibit green-yellow to red emissions under 365 nm excitation. It is noticed that the CuInS 2 /ZnS acts as a sub-energy level to mediate energy transfer between the rare earth ions of the NaYF 4 and CuInS 2 /ZnS QDs. We found that the dual-modal luminescent properties of the synthesized hybrid nanomaterials can be potentially applied in the field of anti-counterfeiting.
研究领域:
材料科学
·
光学
·
纳米技术
✓ 已验证
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 81
·77777-77785
·
IF 3.289
Lili Yan,Jiaolong Qin,Long Kong,Huibo Zhi,Mingxing Sun,Guoqing Shen,Liang Li
A novel and improved protocol was developed to prepare CuInS2/ZnS:Al-sensitized TiO2 (CIS/ZnS:Al–TiO2) nanocomposites for 1,3-dichloropropene (1,3-D) photodegradation. Response surface methodology was employed to model and optimize the operational parameters of this protocol. The CIS/ZnS:Al quantum dot (QDs) content, ZnS:Al coating time, and TGA/TiO2 molar ratio were chosen as independent variables at three levels by using the Box–Behnken design; their combined effects on the 1,3-D degradation efficiency were investigated. The synthesized CIS/ZnS:Al QDs and CIS/ZnS:Al–TiO2 nanocomposites were characterized by their photoluminescence intensity, UV-vis absorption spectra, X-ray diffraction, and transmission electron microscopy. Based on the experimental results, an empirical expression was established and subsequently applied to predict the 1,3-D degradation efficiency with the prepared photocatalysts. The predicted degradation efficiencies matched well with the experimental values (R2, 0.9874). The ANOVA results showed that the significance of the parameters was ZnS:Al coating time > QDs content > TGA/TiO2 molar ratio. The 3D response surface plots indicated that the optimum synthesis parameters were a CIS/ZnS:Al QDs content of 23%, a coating time of 418 min, and a molar ratio of 1.6. The 1,3-D degradation efficiency with the optimized photocatalyst reached 92% under an irradiation time of 5 h. The photodegradation kinetics of 1,3-D was well fitted with a pseudo-first-order kinetic equation. The experimental design and theoretical prediction methods in this work are of great significance in the design and development of high-performance CIS/ZnS:Al–TiO2 nanocomposites.
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
SENSORS AND ACTUATORS B-CHEMICAL
·
2014
·
IF 3.84
Hongying Liu,Chunchuan Gu,Weiwei Xiong,Mingzhen Zhang
In this paper, CuInS 2 nanocrystals are prepared by microwave-assisted method and found to possess intrinsic peroxidase-like activity for the first time. It could catalytically oxidize 3,3′,5,5′-tetramethylbenzidine by H 2 O 2 to produce a color changing reaction, which is the principle for sensing of H 2 O 2 level. Furthermore, the catalysis mechanism was studied. It was found to follow Michaelis–Menten kinetics and peroxidase activity varied with respect to electrostatic affinity between nanoparticles and substrates, evidenced by differences in determined kinetic parameters. In regard to this, a biosensor was developed for the detection of H 2 O 2 . The results indicated that a good linear relationship was obtained from 0.1 to 20 μM of H 2 O 2 . The detection limit is calculated to be 0.03 μM, which is better than previous reports utilizing various methods. Taking into account the advantages of ultra-small size, good stability, and high biocompatibility, CuInS 2 nanocrystals are expected to have potential applications in biotechnology and clinical diagnosis as enzymatic mimics.
研究领域:
生物技术
·
临床诊断
·
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
MOLECULES
·
2024
·Vol. 29
·期 14
·3334
·
IF 4.2
Aizhen Liao,Zhengchu Liu,Yiqing Wei,Qinghua Xie,Ting Kong,Maolin Zeng,Wenpeng Wang,Chao Yang,Linji Zhang,Yonggang Xu,Yong Zhou,Zhigang Zou
The synthesis of the accurate composition and morphological/structural design of multielement semiconductor materials is considered an effective strategy for obtaining high-performance hybrid photocatalysts. Herein, sulfur vacancy (Vs)-bearing In2S3/CuInS2microflower heterojunctions (denoted Vs-In2S3/CuInS2) were formed in situ using In2S3microsphere template-directed synthesis and a metal ion exchange-mediated growth strategy. Photocatalysts with flower-like microspheres can be obtained using hydrothermally synthesized In2S3microspheres as a template, followed by Ostwald ripening growth during the metal cation exchange of Cu+and In3+. The optimal heterostructured Vs-In2S3/CuInS2microflowers exhibited CO and CH4evolution rates of 80.3 and 11.8 μmol g−1h−1, respectively, under visible-light irradiation; these values are approximately 4 and 6.8 times higher than those reported for pristine In2S3, respectively. The enhanced photocatalytic performance of the Vs-In2S3/CuInS2catalysts could be attributed to the synergistic effects of the following factors: (i) the constructed heterojunctions accelerate charge-carrier separation; (ii) the flower-like microspheres exhibit highly uniform morphologies and compositions, which enhance electron transport and light harvesting; and (iii) the vs. may trap excited electrons and, thus, inhibit charge-carrier recombination. This study not only confirms the feasibility of the design of heterostructures on demand, but also presents a simple and efficient strategy to engineer metal sulfide photocatalysts with enhanced photocatalytic performance.
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
ACS Photonics
·
2018
·
IF 6.88
Pengqi Lu,Ruifeng Li,Ni Yao,Xusheng Dai,Zhenyu Ye,Kai Zheng,Weiguang Kong,Wei Fang,Shuang Li,Qinghua Xu,Huizhen Wu
Heavy-metal-free I–III–VI2 quantum dots (QDs) have recently emerged as favorable alternatives to toxic II–VI QDs for optoelectronic and biological applications, but low fluorescence efficiency is a key issue related to the promising nanocrystals. In this work, we demonstrate big enhancement of two-photon fluorescence efficiency and low threshold two-photon pumped amplification of spontaneous emission (ASE) of Zn-processed CuInS2 (CIS) QDs for the first time. The change of two-photon process caused by Zn2+ cation exchange in CIS QDs is systematically investigated. Two-photon ASE in Zn-processed CIS QDs films is achieved with a record of low threshold fluence of 5.7 μJ/cm2. With high two-photon fluorescence quantum yields and low threshold ASE, the Zn-processed CIS QDs could become a promising candidate for two-photon bioimaging, nonlinear optical and novel QDs laser devices.
研究领域:
材料科学
·
光学
·
生物成像
✓ 已验证
产品关联
DOI
高影响因子
Journal of Water Process Engineering
·
2025
·
IF 6.7
Xingjian Zhang,Shukui Shi,Jiping Shi,Lu Ruan,Xin Li,Xiaoli Jin,Fengyun Su,Lin Guo,Haiquan Xie
This study aims to develop a high-efficiency solar energy utilization system for water purification by synthesizing porous CuInS 2 (CIS) nanosheet arrays on a compacted stainless steel mesh (CSSM) using a facile solvothermal method. The CIS/CSSM system leverages interfacial heat to drive water evaporation and enhance photodegradation via photothermal effects. The porous architecture of both the CSSM and the black CIS nanosheets significantly improves light collection efficiency, achieving a solar absorption rate of 97.3 %, thereby facilitating efficient photothermal conversion. Under simulated 1-sun illumination, the system attains an evaporation rate of 1.43 kg m −2 h −1 with a high evaporation efficiency of 93.01 %. The cost-effective CSSM possesses robust chemical stability, making the CIS/CSSM an efficient solar purification system capable of distilling clean water from seawater, river water, and highly acidic/alkaline solutions. Furthermore, the system demonstrates excellent photothermal catalytic degradation, achieving 88.1 % degradation of ciprofloxacin solution. In outdoor sunlight, the system simultaneously maintains an evaporation rate of 1.23 kg m −2 h −1 and a photothermal degradation efficiency of 80.7 %, highlighting its potential application in water purification. This study integrates photothermal catalysis with solar-driven interfacial evaporation, offering a novel and efficient approach for wastewater treatment and water purification.
研究领域:
材料科学
·
环境科学
·
能源科学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Fang Chen,JiaYu Liao,Xuan Lu,YuZhi Xu,XiaoHuan Jiang,Mengkui Tian
Exploring efficient and stable water-splitting photocatalysts is critical for realizing conversion solar energy into hydrogen energy. Herein, a unique 2D/2D S-scheme Cd 0.5 Zn 0.5 S/CuInS 2 heterojunction with sulfur vacancies was rationally designed by chemically converting inorganic–organic hybrid ZnS(en) 0.5 into inorganic Cd 0.5 Zn 0.5 S nanosheets and fabricating with CuInS 2 at 350 °C under an N 2 atmosphere. The final Cd 0.5 Zn 0.5 S/CuInS 2 photocatalyst was composed of thin nanosheets with a substantial interfacial contact area, which enhanced light absorption and allowed directional charge transfer and separation. Under visible light irradiation, the photocatalytic H 2 evolution activities of Cd 0.5 Zn 0.5 S nanosheets is 0.79 mmol·g −1 ·h −1 , which is greater than other solid solution materials obtained by varying Cd and Zn ratios. The 2D/2D nanosheets with 8% CuInS 2 exhibit excellent hydrogen evolution activity with yields of 7.73 mmol·g −1 ·h −1 , which are 9.8 and 138 times higher than Cd 0.5 Zn 0.5 S and CuInS 2 . In addition, Cd 0.5 Zn 0.5 S/CuInS 2 photocatalyst demonstrates outstanding stability and activity over the course of 24-hour period. Moreover, the transfer pathway of photogenerated charges were explored by the energy band bending, which proved that an S-scheme heterojunction is synthesized successfully.This work offers a useful methodology for analyzing S-scheme heterojunction with abundant sulfur vacancies, and improving the solar hydrogen evolution performance of Cd 0.5 Zn 0.5 S photocatalyst.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF FLUORESCENCE
·
2024
·
IF 2.6
Jia Zixuan,Chen Menghan,Yang Mohan,Chen Shenna,Zhang Xuhong
In this study, a novel fluorescent probe based on CuInS 2 quantum dots modified with alanine (Ala-CuInS 2 QDs) was developed for the detection of lead ions and cysteine (Pb 2+ and Cys). Ala-CuInS 2 QDs were synthesized through a one-step hydrothermal method exhibiting uniform size, good stability and water solubility. The QDs were then utilized as an “on-off-on” fluorescence sensor to detect Pb 2+ and Cys in the ranges of 0–20 µM and 0–55 µM respectively, with detection limits of 0.29 µM and 0.66 µM. The mechanism of fluorescence quenching and recovery processes was also explored. Furthermore, Ala-CuInS 2 QDs have been successfully applied to detect Pb 2+ in tap and river water and detect cysteine in serum.
研究领域:
分析化学
·
环境科学
·
生物医学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Jing Wang,Xingyu Niu,Qi Hao,Kun Zhang,Xinyi Shi,Liping Yang,Hui Ying Yang,Jilei Ye,Yuping Wu
Low charge separation efficiency significantly hampers the performance of photocatalytic hydrogen production. Constructing heterojunctions emerges as a crucial strategy to enhance photocatalytic activity by improving charge separation. An S-scheme heterojunction not only effectively separates the photogenerated charge in composite photocatalysts but also preserves optimal redox capabilities. This study presents the first report of CuInS 2 /CeO 2 (CIS/CeO 2 ) and demonstrates how charge separation within CIS/CeO 2 to enhance photocatalytic hydrogen production through the construction of an S-scheme heterojunction. The UV–visible-driven hydrogen production rate of CIS/CeO 2 is 4.6 and 9.4 times higher than that of CIS and CeO 2 alone, respectively. The improved photocatalytic performance primarily stems from enhanced charge separation promoted by the S-scheme heterojunction. The charge transfer pathway was confirmed as an S-scheme mechanism through a combination of band structure experiments, density functional theory (DFT) calculations on work function, internal electric field, and charge differential density distribution, alongside electron paramagnetic resonance (EPR) experiments. Multiple perspectives were employed to elucidate the reasons behind facilitating efficient charge separation. This research provides valuable insights for advancing photocatalytic performance.
研究领域:
材料科学
·
光催化
·
能源转换
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2021
·
IF 6.986
Zhipeng Li,Xunxun Deng,Shuo Wu,Shuangtian Dong,Guizheng Zou
The overwhelming majority of commercially available chemiluminescence (CL) assays are conducted in the eye-visible region. Herein, a near-infrared (NIR) aqueous CL strategy was proposed with CuInS2@ZnS nanocrystals (CIS@ZnS NCs) as emitters. Hydrazine hydrate (N2H4·H2O) could inject electrons into the conduction band of the CIS@ZnS NCs and simultaneously transformed to the intermediate radical N2H3•. N2H3• reduced dissolved oxygen (O2) to O2–•, while the O2–• could inject holes into the valence band of the CIS@ZnS NCs. The recombination of electrons and holes at Cu+ defects in CIS@ZnS NCs eventually yielded efficient NIR CL at around 824.1 nm, which is the longest waveband for NCs CL to the best of our knowledge. The NIR CL could be conveniently performed in the neutral aqueous medium (pH 7.0) with a quantum yield of 0.0155 Einstein/mol and was successfully employed for constructing a signal-off CL biosensor with ascorbic acid as the analyte as well as a signal-on CL biosensor for determining ascorbate oxidase, which indicates that this NIR CL system has a promising potential for bioassays in diverse ways.
研究领域:
分析化学
·
生物医学工程
✓ 已验证
DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2020
·Vol. 28
·期 6
·6980-6989
·
IF 3.056
Yan Lili,Guo Xin,Rao Pinhua,Huang Lu,Sun Mingxing,Li Liang,Shen Guoqing
Soil fumigation using 1,3-dichloropropene (1,3-D) and chloropicrin (CP) is an important strategy for agriculture production; however, excessive emissions can cause air pollution and possible human exposure. In this study, solar light-driven CuInS 2 /ZnS:Al-TiO 2 photocatalytic film was prepared through spin-coating on the flexible polyethylene terephthalate (PET) substrate of 0.1 mm. Using the photocatalytic film, degradation of 1,3-D was inhibited in the Pci-clor 60 formulation of 1,3-D and CP. However, the degradation of CP was accelerated in this formulation, and the half-life was shortened from 0.66 to 0.40 h. Emissions of 1,3-D from soil to the air were reduced by 97.30%, 97.17%, 47.10%, and 7.88%, for treatments of D + Film, D + C + Film, D + PET, and D, respectively. The efficiencies for reducing 1,3-D emission were significantly improved by about 1.1 and 11.3 times using the film, compared with using the PET alone and no film, respectively. Furthermore, fumigation effects on nematodes could still achieve higher than 90%. The findings provided a basis for the practical application of quantum dot films to reduce soil fumigants emissions by photocatalytic degradation.
研究领域:
环境科学
·
农业化学
·
材料科学
✓ 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）