LANGMUIR
·
2025
·
IF 3.9
Maosheng Sang,Yang Han,Heng Zhang,Zhongyu Li,Quanlong Zhou,Xiaoya Meng,Yuhao Zhang,Yemin Guo,Xia Sun,Surayo Rakhmatzhanovna Usmanova,Jamshed Bobokalonov,Wenping Zhao
An “on–off” electrochemiluminescence (ECL) aptasensor was proposed for the highly sensitive and selective detection of ochratoxin A (OTA) in cereals. The substrate nanomaterial employed in the ECL experiments was titanium carbide (Ti3C2Tx) MXene, while cadmium sulfide quantum dots (CdS QDs) were used as coreactants of the ECL reagent tris (2,2′-bipyridyl) ruthenium(II) (Ru(bpy)32+). Compared to tripropylamine, a more toxic conventional coreactant, CdS QDs can react efficiently with Ru(bpy)32+ in the ECL reaction, and the reaction principles of both were also investigated. The effective connection between CdS QDs and Ru(bpy)32+ via the aptamer resulted in a shortened electron transfer distance, which in turn led to an improvement in ECL intensity and the achievement of the first “on” state. The introduction of OTA resulted in the loss of the effective connection between the CdS QDs and Ru(bpy)32+, which caused the sensor to enter an “off” state. The high ECL intensity of the sensor in the “on” state, in contrast with the low ECL intensity of the “off” state, resulted in an increase in the sensitivity and stability of the sensor. The established aptasensor exhibited a low limit of detection (LOD) of 0.03 ng/mL within a linear range of 0.1 ∼ 100 ng/mL, with spiked recoveries ranging from 93.7% to 105.1%, showing good selectivity, stability, and reproducibility for the detection of OTA in cereals.
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高影响因子
Advanced Science
·
2025
·
IF 14.1
Yongrui Ti,Ziqiang Qin,Xiaohong Guo,Zheng Wu,Qi Jiang,Beihua Dong,Olaniyi Amos Fawole,Di Wu,Su Chen,Xian Li,Kunsong Chen
Carbon dots (CDs) have elicited attention in photodynamic antimicrobial applications, but their susceptibility to aggregation limits their effectiveness. Herein, CDs@ZIF-8 nanocomposites are synthesized. The results reveal that they have superior dual photodynamic enhanced antimicrobial properties, specifically 7.63 log 10 CFU mL −1 (lg) elimination for Escherichia coli (only 3.12 lg with CDs and 4.18 lg with ZIF-8) and 7.27 lg elimination for Staphylococcus aureus (only 4.17 lg with CDs and 2.94 lg with ZIF-8). Optoelectronic property analysis and density functional theory calculations show that the enhanced photodynamic antimicrobial properties of CDs@ZIF-8 can be attributed to their narrow bandgap and higher binding affinity for O 2 , which facilitates the photo-generated e − –h + pairs separation and promotes the generation of 1 O 2 and •O 2 − . Furthermore, the CDs@ZIF-8/polycaprolactone/ethyl cellulose nanofibrous films are prepared by microfluidic-blow-spinning, which have prominent antimicrobial properties and extend the shelf life of strawberries from 6 to 12 d. Overall, this study provides a novel idea for designing synergistically enhanced photodynamic antimicrobial materials and photodynamic preservation of perishable fruits.
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Small
·
2025
·
IF 12.1
Zibo Li,Yang Xu,Fanchen Yu,Yi Jia,Rong Shu,Yue Li,Xuanze Meng,Jinbo Fei,Xia Xu,Junbai Li
Developing highly efficient catalysts to reduce and convert CO 2 holds profound significance in addressing the global energy and environmental crises. In this work, an innovative hybrid photocatalyst is elaborately designed that integrates a metal–organic framework (MOF) and CdS quantum dots (QDs). The coordination and architecture structure of MOF crystals is readily modulated by increasing the number of benzenes in ligands, achieving a high coordination rate of Rh complex close to 100%. This structural optimization creates a hierarchical network featuring abundant exposed active sites and large pore size for fast mass diffusion. More importantly, the integrated CdS QDs refine the electronic state of Rh, further enhancing efficient electron transfer. Coupling with formate dehydrogenase (FDH), this hybrid photocatalyst not only demonstrates exceptional performance in converting CO 2 into formate but also simultaneously promotes the highly efficient regeneration of key coenzyme nicotinamide adenine dinucleotide phosphate (NADPH), with an outstanding yield of 85.6%. This work provides a straightforward and feasible method for regulating the coordination architecture and electron transfer of hybrid photocatalysts, offering valuable insights for developing highly active and robust catalysts.
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高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Hongyue Wang,Yangyang Guo,Hongxing Hao,Hongtao Bian,Herve Aubin,Yang Wei,Huixin Li,Taihong Liu,Aloyse Degiron,Hongqiang Wang
Addressing the interactions between optical antennas and ensembles of emitters is particularly challenging. Charge transfer and Coulomb interactions complicate the understanding of the carrier dynamics coupled by antennas. Here, we show how Au antennas enhance the luminescence of CdSe/CdS quantum dot assemblies through carrier dynamics control within the framework of the local Kirchhoff law. The Au antennas inject hot electrons into quantum dot assemblies via plasmon-induced hot electron transfer that increases the carrier concentration. Also, the localized surface plasmon resonances of Au antennas favorably tilt the balance between nonradiative Auger processes and radiative recombination in the CdSe core. Eventually, a high bright (125,091.6 cd/m2) deep-red quantum dot light-emitting diode is obtained by combining with Au antennas. Our findings suggest a new understanding of light emission of assembled emitters coupled by antennas, which is of essential interest for the description of light–matter interaction in advanced optoelectronics.
研究领域:
光学
·
材料科学
·
纳米技术
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高影响因子
FOOD CHEMISTRY
·
2026
·
IF 10.4
Qiulan Li,Jiahe Dai,Yaling Yang,Linqian Hou,Hong Li
In this study, an “off” signal chemiluminescence (CL) sensor was designed for the detection of glyphosate (Gly) based on Cu-CDs/ABEI@Ag as CL enhancers. Copper-doped carbon dots (Cu-CDs) was synthesized through a sample microwave digestion approach, and AgNO 3 was reduced to silver nanoparticles (AgNPs) utilizing N-(4-aminobutyl)-N-ethylisoluminol (ABEI) and prepared Cu-CDs as mild reducing agents. The Cu-CDs and AgNPs demonstrated peroxidase (POD)-like properties, facilitating the breakdown of H 2 O 2 into reactive oxygen species (ROS) such as ∙OH, ∙O 2 − , and 1 O 2 to generate CL signal. By integrating ABEI into the catalyst system, the CL reagent became concentrated within the catalyst structure, minimizing the spatial separation between the catalyst and ABEI, thus amplifying the CL response. Notably, Gly can inhibit POD-like activity by interaction between Cu-CDs/ABEI@Ag and Gly, thus decrease the CL intensities produced from oxidation of ABEI. Based on this highly sensitive “off” response in CL, a CL nano-sensor was developed for Gly detection, achieving a detection limit of 3.87 μg/L. Furthermore, satisfactory spiked recovery rates (95.86–111.13%) were obtained in coffee samples, highlighting the sensor's promising applicability for on-site Gly monitoring.
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Functional Materials Letters
·
2024
·
IF 1.2
Wenge Liang,Tao Gao,Jia Yi
With the continuous exposure of major food safety issues in recent years, food safety has become the focus of people’s attention. As a widely distributed bacterium, excessive levels of Escherichia coli in food may cause gastrointestinal discomfort symptoms, as well as adverse consequences such as food poisoning, acute gastroenteritis, food allergies, and gastric ulcers. Therefore, to ensure food safety and achieve rapid detection of E. coli , this study uses CdS quantum dots (QDs) nanomarkers to detect E. coli in water. Moreover, electrochemical square wave voltammetry is used to determine the relationship between Cadmium (Cd) ion concentration and E. coli concentration in the complex after enzyme-linked immunosorbent reaction. The experiment showed that the average particle size of CdS QDs nanoparticles was 5 nm and they had good biocompatibility. The current magnitude of electrochemical square wave voltammetry was positively correlated with the concentration of Cd ions and E. coli . When the concentration of E. coli was 50-1.0 × 1 0 5 cfu/mL, its concentration was linearly positively correlated with the magnitude of the current, with a linear correlation coefficient of 0.9873. Compared to the flat plate counting method, its relative error did not exceed 10%, and in addition, the detection time was only 2 h. The above results indicate that CdS QDs nanomarkers can achieve rapid detection of E. coli , effectively improve the detection sensitivity of E. coli , and weaken non-specific adsorption.
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高影响因子
Chemistry-An Asian Journal
·
2013
·Vol. 8
·期 10
·2395-2400
·
IF 4.572
Guancai Xie,Kai Zhang,Hui Fang,Beidou Guo,Ruzhi Wang,Hui Yan,Liang Fang,Jian Ru Gong
CdS modified with reduced graphene oxide (RGO) has been widely demonstrated to be effective in the field of solar-energy conversion. However, the inherent mechanism of this superior property is still not thoroughly understood. Thus the photoelectrochemical method was employed to systemically investigate the synergetic effect between CdS and RGO. The result shows that the photoelectrochemical properties of RGO/CdS samples are sensitive to the relative ratio of RGO to CdS, and the photoelectrode with 1.0 wt % ratio of RGO possesses the best photoelectrochemical performance. Further investigation demonstrates that the synergetic effect between CdS and RGO directly influences the charge-transport property and band-structure of the composite, which is also supported by the X-ray photoelectron spectroscopy data and first-principle simulation, respectively.
研究领域:
材料科学
·
光电化学
·
可再生能源
·
纳米材料
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高影响因子
Journal of Materials Chemistry C
·
2017
·Vol. 5
·期 8
·2107-2113
·
IF 5.256
Xiwei Zhang,Jie Mao,Zhibin Shao,Senlin Diao,Dan Hu,Zhenjie Tang,Haihua Wu,Jiansheng Jie
For solar cells, high open circuit voltage is necessary for their high output voltage. Usually, two methods are used to increase the open circuit voltage: using suitable and matched large band-gap materials and reduction of saturation current. Herein, large band-gap p-type ZnSe nanowires and n-type CdS films are used to construct core–shell p–n heterojunctions with high open circuit voltage. Furthermore, a 4 nm Si3N4 layer is inserted between the ZnSe core and the CdS shell in order to passivate the interface defects and to reduce recombination and the saturation current. Additionally, a fast annealing process is employed to reduce the series resistance for improved performance. For a typical device, an optimum high open circuit voltage of ∼1.3 V and an energy conversion efficiency of ∼5.27% were achieved for its photovoltaic operation. Moreover, tens of devices were fabricated to demonstrate their stable and consistent performance.
研究领域:
材料科学
·
光伏技术
·
纳米技术
·
半导体器件
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高影响因子
MICROCHEMICAL JOURNAL
·
2026
·
IF 5.1
Zhonghui Li,Hongbin Pu,Zhongping Yao,Qingyi Wei
Aflatoxin B 1 (AFB 1 ), the most potent natural carcinogen, poses a serious threat to food security and human health. Hence, monitoring and controlling AFB 1 levels in food is of paramount importance. Nitrogen-doped carbon dots (N-CDs) exhibit great potential for sensing applications, but their single-intensity signals are often susceptible to interference. Covalent organic frameworks (COFs) have been widely applied in sensing and adsorption. By integrating N-CDs with COFs, a hybrid material named N-CDs/COF TAPB-DMTP was constructed as a ratiometric fluorescent probe for AFB 1 detection. The sensing platform not only retains the exceptional optical properties of N-CDs but also incorporates the superior adsorption capabilities of COFs. Here, N-CDs/COF TAPB-DMTP showed outstanding sensitivity with a remarkably low detection limit of 0.0876 ng/mL and a linear range from 0.5 to 100 ng/mL. The developed sensor also exhibited excellent reproducibility, anti-interference capability, and stability. In spiked food samples, satisfactory recovery rates of 90.00% to 126.00% were achieved. Furthermore, the probe accurately distinguished between AFB 1 -positive and negative peanuts, matching results from colloidal gold test cards and ELISA. Owing to its high surface area and selective sites, this composite showed an outstanding AFB 1 adsorption capability of 91.7431 mg/g. Density functional theory (DFT) calculations were employed to elucidate the adsorption mechanism between COF TAPB-DMTP and AFB 1 , which was shown to involve weak hydrogen bonds and π-π stacking interactions. Overall, a new dual-function platform has been constructed for the highly sensitive monitoring and efficient elimination of AFB 1 , offering a low-cost and simple-operating strategy with significant potential for food safety control.
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Small
·
2020
·Vol. 16
·期 26
·2001024
·
IF 11.459
Xianglin Xiang,Bicheng Zhu,Bei Cheng,Jiaguo Yu,Hongjin Lv
Herein, oil-soluble CdS quantum dots (QDs) are first prepared through a solvent-thermal process. Then, oil-soluble CdS QDs are changed into water-soluble QDs via ligand exchange using mercaptopropionic acid as capping agent at pH 13. The photocatalytic performance is investigated under the visible light irradiation using glycerol as sacrificial agent and Sn 2+ as cocatalyst. No H 2 -production activity is observed for oil-soluble CdS QDs. Water-soluble CdS QDs exhibit significantly enhanced hydrogen evolution rate. When the concentration of cocatalyst Sn 2+ increases to 0.2 × 10 −3 m , the rate of hydrogen evolution reaches 1.61 mmol g −1 h −1 , which is 24 times higher than that of the pristine water-soluble CdS QDs. The enhanced H 2 -production efficiency is attributed to the adsorption of Sn 2+ ions on the surface of CdS QDs that are further reduced to Sn atoms by photogenerated electrons. The in situ generated Sn atoms serve as photocatalytic cocatalyst for efficient hydrogen generation.
研究领域:
材料科学
·
光催化
·
纳米技术
·
氢能
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高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
·
2017
·Vol. 19
·期 10
·1-13
·
IF 2.02
Yang Jiangbing,Gao Jianping,Wang Xiaoxue,Mei Shunkang,Zhao Ruiru,Hao Chaoyue,Wu Yongli,Zhai Xiangang,Liu Yu
Porous polyacrylamide hydrogel (PAM) was prepared by polymerization at room temperature. Cadmium sulfide/polyacrylamide hydrogels (CdS/PAM) was synthesized by in situ loading CdS nanoparticles and used for photocatalytic decomposition of water for the first time. The size distribution of the loaded CdS nanoparticles is 3–12 nm. We studied the enhanced photocatalytic activity and photo-corrosion inhibition of CdS/PAM the compared with pure CdS and probed the mechanism of the improvement. In particular, the CdS/PAM prepared in 0.003 M CdCl 2 solution exhibited the highest hydrogen production efficiency of 2.929 mmol g −1 h −1 , about 79 times that of pure CdS. The results demonstrate that the formation of new N–Cd bond and high transmittance of CdS/PAM dramatically enhance photocatalytic activity. The electron cloud of nitrogen atom can attract holes and repel photogenerated electrons, which lowers the carrier recombination probability. The results also reveal that the excellent hydrophilicity of hydrogel plays an important role in the inhibition of photocorrosion. In addition, CdS/PAM is easily recycled and processed. The present work will pave a good way for the application of smart hydrogels in the field of photocatalytic hydrogen production.
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研究领域:
材料科学
·
光催化
·
纳米技术
·
氢能
·
高分子化学
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高影响因子
JOURNAL OF FLUORESCENCE
·
2026
·
IF 3.4
Gu Jianlong,Gao Li,Cai Jieyun,Liu Yuchen,Meng Hongming,Long Jie,Ma Jing,Yang Bing,Wang Chunqiong,Yang Yaling
Carbon dots-based nanozymes show great potential for chemiluminescence (CL) detection due to their stability, excellent catalytic properties, good biocompatibility, and facile synthesis. In this study, bimetallic carbon dot nanoenzymes (Cur/Cu, Fe@CDs) that promote the chemiluminescence signal of luminol were synthesized. Cur/Cu, Fe@CDs possess high peroxidase (POD) activity and can catalyze the luminol/hydrogen peroxide reaction to generate a strong chemiluminescence intensity, which is approximately 8.98 times higher than the chemiluminescence spectral signal produced by the same concentration of K 3 [Fe(CN) 6 ]. Additionally, a sensitive and rapid method for detecting magnesium ions (Mg 2+ ) was developed by leveraging the enhancing effect of Mg 2+ on the CL signal in this system. The proposed CL technique for Mg 2+ demonstrated a linear response range from 3.33 to 166.67 µM and a detection limit of 0.99 µM. Moreover, the method was successfully applied to analyze Mg 2+ in cigarette paper samples through a spiking procedure, achieving a recovery rate of 91.1% to 109.0%. This research offers substantial evidence supporting the advancement of efficient and sensitive platforms for Mg 2+ CL detection.
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高影响因子
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