MICROCHEMICAL JOURNAL
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2021
·
IF 4.821
Xiu-hua Wei,Xing Qiao,Jie Fan,Yuan-qiang Hao,Yin-tang Zhang,Yan-li Zhou,Mao-tian Xu
Herein, a label-free electrochemiluminescence (ECL) biosensor for sensitive determination of carcinoembryonic antigen (CEA) was fabricated based on CdS quantum dots loaded onto metal organic framework (CdS QDs@MOF) and triethanolamine modified on gold nanoparticles (TEOA@AuNPs) as bi-coreactants of Ru(bpy) 3 2+ ECL system. The TEOA@AuNPs served as not only coreactant of Ru(bpy) 3 2+ but also nanocarrier for CEA aptamer which was bonded to the TEOA@AuNPs through Au–S bond. After incubated in CEA solution, the ECL signals decreased due to the poor conductivity of CEA and there was a linear correlation between the ECL intensity and log(C CEA ). Based on this result, a label-free ECL biosensor has been developed successfully and used to detect CEA with a detection limit of 8.5 × 10 −5 ng/mL. The proposed ECL aptasensor had good analytical performance in the detection of CEA in human serum samples.
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高影响因子
DYES AND PIGMENTS
·
2019
·
IF 4.018
Siyao Zhu,Feifei Zhao,Mingxiao Deng,Tianyi Zhang,Changli Lü
The nanostructured hybrid assembly has gained growing interest due to their unique electronic, optical and catalytic properties . Herein, a novel ratiometric fluorescent sensor was constructed by coupling blue-green emission carbon dots (CDs) to a block copolymer micelle-encapsulated red-emission CdSe/ZnS QDs through host-guest interaction. The carbon dots (CDs) were prepared by carbonization of β-cyclodextrin (β-CD) via a simple hydrothermal process. The amphiphilic diblock copolymer AZO-PNIPAM-b-P(St-co-MQ) containing azobenzene (AZO)-terminated hydrophilic poly( N -isopropylacrylamide) (PNIPAM) block and hydrophobic polystyrene (PS) block was synthesized by a typical RAFT polymerization . The 5-(2-methacryloylethyloxymethyl)-8- quinolinol (MQ) units were introduced into PS block, which could make CdSe/ZnS QDs to be embedded into the core of the block polymer micelles via coordination interaction in the self-assembling process. The as-fabricated β-cyclodextrin derived CDs-coupled block copolymer hybrid micelles loaded with CdSe/ZnS QDs as a fluorescence sensor exhibited dual emission peaks of CDs centered at 450 nm and CdSe/ZnS QDs at 620 nm with a large peak separation of 170 nm upon excitation at 360 nm. And the as-prepared hybrid micelles as a ratiometric fluorescence sensor can be applied to detect Hg 2+ and Cu 2+ with the detection limits down to 1.6 and 2.74 μM, respectively.
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高影响因子
Journal of Materials Chemistry C
·
2016
·Vol. 4
·期 41
·9856-9863
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IF 5.066
Jun Yao,Xin Gou
In this paper, we report a green, ultrafast and facile aqueous preparation of highly luminescent core–shell CdTe/CdS with significant stability under atmospheric pressure. The surface topography, size, physical shape as well as crystalline structures were studied fully and in depth by adopting a variety of analytical methods such as transmission electron microscopy (TEM) and X-ray diffraction (XRD). The possible mechanism involved in the core growth was proposed and the relevant processes were conjectured too. In this study, we presented a convenient label-free fluorescence nanosensor for the rapid determination of trace mercury, which exhibited many advantages, such as a high sensitivity, excellent selectivity, a rapid response time, a wide linear range and a low limit of detection (LOD). The LOD is down to 1.7 × 10−9 mol L−1, which is lower than that of most other detection methods for mercury.
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2017
·
IF 9.446
Ruowen Liang,Fenfen Jing,Guiyang Yan,Ling Wu
Visible-light-initiated organic transformations have received much attention because of low cost, relative safety, and environmental friendliness. In this work, a series of CdS-decorated MIL-68(Fe) nanocomposites (CdS-M68 NCs) have been prepared via a facile room-temperature photodeposition technique in a controlled manner. Importantly, the CdS-M68 NCs exhibit remarkably enhanced photoactivity toward selective reduction of 4-nitroaniline (4-NA) to p -phenylenediamine (PPD) in water under visible light irradiation (λ ≥ 420 nm) as compared to bare CdS and MIL-68(Fe), giving a 4-NA conversion of ∼100% after irradiation for 8 min. The significantly enhanced photoactivity is attributed to the integrated factors of the effective transportation of the photogenerated electron-hole pairs and the enhanced visible light absorption intensity. Combining with trapping experiments and ESR analysis, it could be revealed that the photoexcited electrons and CO 2− radicals should be the main active species in the present system. In addition, a possible photocatalytic reduction mechanism has been investigated.
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高影响因子
DYES AND PIGMENTS
·
2024
·
IF 4.1
Xiang Long,Hongxiang Liu,Jing Hu,Shaogui Wu
Herein, we report a facile one-step solvothermal synthesis of nitrogen and sulfur co-doped fluorescent carbon dots (N,S-CDs) using benzoic acid as the carbon source and sulfonamide as the doping agent. The synthesized N,S-CDs exhibit stable photoluminescence with an impressive fluorescence quantum yield of 16.8 %. These N,S-CDs maintain their luminescent properties under various challenging conditions, including high salt concentrations, elevated temperatures, UV radiation exposure, acidic or alkaline environments, long-term storage, and different solvents. Notably, the photoluminescence of N,S-CDs is excitation-wavelength dependent, with emission wavelengths tunable from 470 nm to 585 nm. Furthermore, the N,S-CDs display distinct fluorescent hues in aqueous and ethanolic media, presenting a novel dual-switch anti-counterfeiting ink system. Leveraging the sensitivity of N,S-CDs to gentamicin, we have developed a facile and rapid detection method for this antibiotic, which has been successfully applied to the analysis of authentic milk samples. This research contributes a novel and efficient protocol for the fabrication of high-performance carbon dots, thereby expanding their potential applications in food analysis and anti-counterfeiting technologies.
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高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Junyi Wang,Jiaojiao Song,Qi Zhou
A new core-shell structure CdS@Fe 2 S 3 material was synthesized by in situ cation exchange method to enhance the degradation of organic pollutants in water under visible light. It is proved that Fe 2 S 3 nanolayer is successfully loaded on CdS nanorods by TEM and UV-Vis spectra and other means. The representative Rhodamine B was selected as the target pollutant and the results of degradation experiment showed that after 60 min of exposure to LED visible light with a low energy (25 W), the removal efficiency for this dye could reach 98 % in the presence of peroxymonosulfate (PMS) forming free radicals, which displayed a observed kinetic rate constant exceeding 0.62 min −1 that is approximately 5 times higher than the system without PMS addition and 10 times than the system with original CdS as catalyst. The result of inhibition experiments shows that sulfate radical (SO 4 ·- ) and singlet oxygen ( 1 O 2 ) play as important roles during the photocatalytic process. In addition, this core-shell material can be recycled at least four times. Generally, this study can make full use of visible light which can be easily obtained and effectually resolve the organic pollution problems.
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高影响因子
LUMINESCENCE
·
2019
·Vol. 34
·期 7
·680-688
·
IF 1.691
Yang Liu,Piaopiao Chen,Shan Zheng,Yichen Xing,Chaobiao Huang
In this study, a high fluorescence sensitivity and selectivity, molecularly imprinted nanofluorescent polymer sensor (MIP@SiO 2 @QDs) was prepared using a reverse microemulsion method. 2,4,6-Trichlorophenol (2,4,6-TCP) was detected using fluorescence quenching. Tetraethyl orthosilicate (TEOS), quantum dots (QDs) and 3-aminopropyltriethoxysilane (APTS) were used as cross-linker, signal sources and functional monomer respectively. The sensor (MIP@SiO 2 @QDs) and the non-imprinted polymer sensor (NIP@SiO 2 @QDs) were characterized using infra-red (IR) analysis, X-ray diffraction (XRD), transmission electron microscopy (TEM) and scanning electron microscopy (SEM). The selectivity of MIP@SiO 2 @QDs was examined by comparing 2,4,6-TCP with other similar functional substances including 2,4-dichlorophenol (2,4-DCP), 2,6-dichlorophenol (2,6-DCP) and 4-chlorophenol (4-CP). Results showed that MIP@SiO 2 @QDs had better selectivity for 2,4,6-TCP than the other compounds. Fluorescence quenching efficiency displayed a good linear response at the 2,4,6-TCP concentration range 5–1000 μmol/L. The limit of detection (LOD) was 0.9 μmol/L (3σ, n = 9). This method was equally applicable for testing actual samples with a recovery rate of 98.0–105.8%. The sensor had advantages of simple pretreatment, good sensitivity and selectivity, and wide linear range and could be applied for the rapid detection of 2,4,6-TCP in actual samples.
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Sustainable Energy & Fuels
·
2024
·Vol. 8
·期 13
·2889-2899
·
IF 5
Jiaqi Wang,Hongyang Huo,Guozhe Sui,Shuang Meng,Dongxuan Guo,Shanshan Fu,Dantong Zhang,Xue Yang,Jinlong Li
The development of visible-light-active photocatalysts with high performance has been regarded as a promising way to address environmental wastewater issues. In this work, a highly efficient g-C3N4/CdS/TiO2 ternary Z-type heterojunction photocatalyst with a hollow structure has been fabricated using a step-by-step self-assembly strategy, which demonstrates excellent photocatalytic performance under visible light and removes various water-soluble organic pollutants effectively. The photocatalytic degradation efficiency of 20-g-C3N4/CdS/TiO2-10 against rhodamine B (RhB) is found to be 29.8 times higher than that of the pristine g-C3N4 within 90 minutes of visible light irradiation attributed to the active species of ˙O2− and h+. Liquid chromatography mass spectrometry results suggest that the degradation pathway of RhB involves main steps such as N-de-ethylation, chromophore cleavage, ring opening, and mineralization. A series of characterization analyses, combined with the observed enhanced photocatalytic performance, indicate that the g-C3N4/CdS/TiO2 ternary heterojunction benefits from the rapid transport and separation of photogenerated carriers facilitated by the formation of a heterointerface. Furthermore, the g-C3N4/CdS/TiO2 ternary heterojunction exhibits favorable stability, with 88.1% degradation efficiency after five cycles of degradation experiments. This work provides novel insights into the preparation and application of ternary heterojunctions with superior photocatalytic performance for eliminating organic pollutants from wastewater.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Shu Wang,Xin Li,Yuan Chen,Wenlong Yang,Shuang Han,Hui Zhang
The artificial-photosynthesized S-scheme heterojunction for photochemical energy conversion has inspired promising implications for green environmental remediation. Herein, we develop a visible-light response Sn-CdS/ZnFe 2 O 4 heterostructure to exhibit efficient photo-Fenton functionalities on the degradation of dye RhB and antibiotic TC under the simulated solar-driven irradiation. In our work, s-p orbital hybridization by Sn-doping has been employed as an effective strategy to reconstruct a new valence band to further modify the sulfides for their long-term stabilities in strong oxidizing environment. We have not only calculated the rationality of doping model and heterostructure but also experimentally verified the photo-physical process of charge transfer. Furthermore, the modified photocatalyst is conducive to contribute to the rapid and sustainable Fenton-like reactions with the best RhB and TC degradation rates of 1.00 μmol·min −1 ·g −1 cat. and 11.26 μmol·min −1 ·g −1 cat. respectively, which synergistically interplays with the generation and transition of reactive oxygen free radicals. This work extends a new viewpoint for the transition metal doping territory of electronic structure optimization to achieve pollutant degradation with high activity and stability to favor water decontamination applications.
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高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2025
·
IF 4.7
Chang Feng,Yuhong Lin,Yadong Zheng,Zhuoyuan Chen,Jiangping Jing,Li Ma,Jian Hou
Lattice regulation and defect engineering are proven effective strategies to enhance the photocatalytic performance of semiconductor photocatalysts, and have thus garnered extensive research attention in the field of photocatalysis. Therefore, the design of photocatalysts with the synergistic effects of lattice distortion and defect states has emerged as a research priority. In this work, an indium (in)-doped cadmium sulfide (InCdS) photocatalyst was fabricated via a facile water bath method. The lattice distortion and sulfur (S) vacancy induced by in doping, and the photocatalytic Cr(VI) reduction performance of InCdS were systematically investigated. The results demonstrated that in doping not only triggered lattice distortion in CdS but also significantly elevated its S vacancy concentration. Meanwhile, the introduction of in 3+ selectively suppressed the growth of the CdS (200) crystal plane, which induced the morphological transformation of CdS from nanosheets to uniform spherical nanoclusters and remarkably enhanced its specific surface area. The synergistic effect of lattice distortion and S vacancies significantly promotes the separation efficiency of photogenerated carriers in InCdS, thereby enhancing its photocatalytic performance for Cr(VI) reduction. Specifically, 5 %InCdS achieves complete reduction of 30 mg⋅L −1 Cr(VI) within merely 25 min under visible light irradiation, and its reaction rate constant is 15.26 times that of pure CdS. More importantly, 5 %InCdS exhibits excellent stability during the photocatalytic Cr(VI) reduction process. Further mechanistic analysis reveals that photogenerated electrons serve as the dominant active species responsible for the photocatalytic Cr(VI) reduction reaction. This work provides a theoretical basis for the development and design of high-efficiency photocatalysts via simple synthesis strategies that induce lattice distortion and S vacancies, thereby offering new insights into their practical application in the treatment of Cr-containing wastewater
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高影响因子
JOURNAL OF CHROMATOGRAPHY A
·
2025
·
IF 4
Gaojin Zhou,Zhaojin Zhang,Subhan Mahmood,Jie Tang,Shun Yao
For the first time, two kinds of green solvents including ionic liquid (IL) and deep eutectic solvent (DES) were combined for achieving flavonoids and terpenoids simultaneously from Ginkgo leaves. They were applied in the form of micelles and the complex with natural carbon dots (CDs) as extraction and separation mediums, respectively. Especially, the latter was prepared from the lignocellulosic residue of Ginkgo leaves after extraction, which achieved the comprehensive utilization of natural resources. Critical micelle concentrations (CMC) of the IL were determined as 4.70–5.38 in the range from 5 to 45 °C, and the main particle size of CDs was found between 20 and 25 nm. After comprehensive characterization on them, a biphasic system composed of IL micelles and CDs@DES was constructed, with the former in the upper layer and the latter in the lower layer. Then it was successfully applied for obtaining flavonoids and terpenoids from the leaves of Ginkgo biloba with extraction efficiency of 96.2 % and 93.2 % respectively, which were analyzed by liquid chromatography-mass spectrum (LC-MS). Moreover, the IL and DES could be repeatedly used through the post-treatment.
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PubMed
高影响因子
Small
·
2024
·
IF 13
Yongzhuo Yu,Wei Li,Yuxin Huang,Huixing Yang,Chaoyu Lv,Hui xiang Yan,Di Lin,Shichao Jiao,Linlin Hou,Zhiliang Wu
Inspired by energy conversion and waste reuse, hybridized Ni-MOF derivative-CdS-DETA/g-C 3 N 5 , a type-II heterojunction photocatalyst, is synthesized by a hydrothermal method for simultaneous and highly efficient photocatalytic degradation and hydrogen evolution in dye wastewater. Without the addition of cocatalysts and sacrificial agents, the optimal MOF-CD(2)/CN5 (i.e. Ni-MOF derivative-CdS-DETA (20 wt.%)/g-C 3 N 5 ) exhibit good bifunctional catalytic activity, with a H 2 evolution rate of 2974.4 µmol g −1 h −1 during the degradation of rhodamine B (RhB), and a removal rate of 99.97% for RhB. In the process of H 2 -evolution-only, triethanolamine is used as a sacrificial agent, exhibiting a high H 2 evolution rate (19663.1 µmol g −1 h −1 ) in the absence of a cocatalyst, and outperforming most similar related materials (such as MOF/g-C 3 N 5 , MOF-CdS, CdS/g-C 3 N 5 ). With the help of type-II heterojunction, holes are scavenged for the oxidative degradation of RhB, and electrons are used in the decomposition of water for H 2 evolution during illumination. This work opens a new path for photocatalysts with dual functions of simultaneous efficient degradation and hydrogen evolution.
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高影响因子
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