JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2022
·Vol. 169
·期 11
·117508
·
IF 4.386
Jinliang Chen,Sha Han,Hongxia Li,Xiaohui Niu,Kunjie Wang
Nitrogen-doped carbon quantum dots (N-CQDs) were synthesized by one-step hydrothermal method using citric acid as carbon source and urea as nitrogen source. β-cyclodextrin (β-CD) is a cyclic oligosaccharide with a unique hollow structure, which is beneficial to the enrichment of metal ions on the electrode surface while reducing the agglomeration of carbon quantum dots and maintaining conductivity. When Cu2+ is coordinated with β-CD, it can further increase the affinity for Cu2+ and recognize Cu2+ more sensitively. Therefore, we coordinated Cu2+ and β-CD to form copper ion coordinated β-cyclodextrin (Cu-β-CD). By self-assembly, the prepared N-CQDs and Cu-β-CD combined to form Cu-β-CD/N-CQDs composites. The electrochemical sensor constructed by Cu-β-Cd/N-CQDs successfully realizes the selective detection of Cu2+ in the range of 1–125 μmol l−1, and the lowest detection limit is 0.094 μmol l−1. In the detection of actual water samples, the Recovery of Cu2+ was between 92% and 120%, and the RSD was between 2.3% and 5.2%. Therefore, Cu-β-CD/N-CQDs composite is expected to be constructed as a non-toxic, pollution-free electrochemical sensor for selective detection of heavy metal Cu2+ ions in water.
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高影响因子
SOLAR ENERGY
·
2021
·
IF 5.742
Ting Wang,Jiayong Zhang,Bin Yao,Yongfeng Li,Zhanhui Ding,Chunkai Wang,Jia Liu
Five types of Cu 2 ZnSn(S,Se) 4 (CZTSSe) films were fabricated by selenization of Cu 2 ZnSnS 4 (CZTS) precursor films preparing through Cu-Zn-Sn-S precursor solutions with nominal Cu + /(Cu + +Cu 2+ ) ratio of 0, 0.2, 0.4, 0.8 and 1. Five types of CZTSSe solar cells were prepared by using the five types of CZTSSe films as absorbers, respectively. The crystal quality and phase composition of the CZTS and CZTSSe films were characterized by XRD, Raman and SEM, and the photovoltaic performance for the CZTSSe solar cells were measured by J-V and EQE. It is found that the CZTS film consists of kesterite CZTS when the ratio is 0 and of kesterite CZTS together with a small amount of SnS when the ratio is 0.2 to 1. All of the CZTSSe films are comprised of kesterite CZTSSe and a small amount of Zn(S,Se). The crystal quality and lattice constants of the kesterite CZTSSe increase with increasing the ratio, while the amount of Zn(S,Se) decreases with increasing the ratio and almost to zero as the ratio is 1. The power conversion efficiency ( PCE ) of the CZTSSe solar cells increases from 5.47% to 8.43% as the ratio increases from 0 to 1, which is due to improvement in short-circuit current density ( J sc ) and filling factor ( FF ) and decrease in open circuit voltage deficit ( V oc , def ). The influence mechanism of the ratio on the PCE is suggested by analyzing effect of the ratio on electrical parameters of the CZTSSe solar cells.
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ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2022
·Vol. 414
·期 7
·2471-2480
·
IF 4.478
Zhang Hanqiang,Li Yufei,Lu Haixin,Gan Feng
A new dual-mode ratiometric fluorescence and colorimetric probe for selective determination of Cu 2+ was developed based on blue-emission sulfur quantum dots (SQDs) and yellow-emission carbon quantum dots (CQDs). The fluorescence and absorbance of CQDs increased in the presence of Cu 2+ due to the Cu 2+ -oxidized o-phenylenediamine group on the surface of the CQDs. Because of the inner filter effect between SQDs and CQDs-Cu 2+ , the fluorescence response of SQDs decreased following the introduction of Cu 2+ . Furthermore, in the presence of Cu 2+ , the dual-mode SQD–CQD probe showed visible color changes under both ultraviolet light and sunlight. Under optimal conditions, the dual-mode probe was used to quantitatively detect Cu 2+ with a linear range of 0.1–5.0 μM for ratiometric fluorescence and colorimetry, with a limit of detection of about 31 nM and 47 nM, respectively. Finally, the dual-mode probe was used for the determination of Cu 2+ in practical samples to expand the practical application, and the difference between ratiometric fluorescence and colorimetric methods was compared. The recovery results confirmed the high accuracy of the dual-mode probe, showing that it has immense potential for sensitive and selective detection of Cu 2+ in practical samples. Graphical abstract
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2017
·
IF 5.401
Ge Zhang,Hui Zhang,Jie Zhang,Wanchuan Ding,Jingkun Xu,Yangping Wen
A dissolvable conjugated polymer oligo(1-pyreneboronic acid) (OPYBA) as the fluorescent sensor was facilely electrosynthesized for highly selective analysis of Cu 2+ at ultra-trace levels in real samples. OPYBA was obtained by potentiostatical electropolymerization of corresponding monomer at 1.0 V vs. Ag/AgCl in acetonitrile containing tetrabutylammonium tetrafluoroborate and dedoped with dilute HCl. The tetrahydrofuran-solvable OPYBA showed good fluorescent properties and could specifically recognize Cu 2+ , and then it was employed for the quantification of Cu 2+ in linear ranges of 25 pM–88.2 μM and 188 μM–750 μM with a low detection limit of 23 pM. As the fluorescent sensor, OPYBA displayed a high sensitivity and selectivity for Cu 2+ over other substances existing in environment and agro-products such as metal ions, anions, organic acids, amino acids, and carbohydrates. Also, it was used to detect Cu 2+ in tap water, lake water, white rice, Chinese cabbage, and cropland soil samples with satisfactory results, revealing that OPYBA could be as a practical sensing platform for ultra-trace analysis of Cu 2+ in environment and agro-product samples.
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高影响因子
ENVIRONMENTAL POLLUTION
·
2024
·
IF 7.6
Wanyu Zhang,Jian Liang,Sufeng Wang,Mingyang Lin,Jingshan Li,Li Chen,Yingchao Zhang,Tifeng Jiao
This study reported a new strategy for enhanced Pb 2+ and Cu 2+ sequestration by Artemia cyst shell (shell) supported nano-Mg from aqueous solutions and the carbonated exhausted-adsorbents sequenced potential application in photo-catalyst, which obtained two expected results. One is that the immobilization of nano-Mg onto Artemia cyst shell (shell-Mg) can greatly strengthen the adsorption effect of the neat cyst shell on Pb 2+ and Cu 2+ . The adsorption capacities of shell-Mg for both metal ions reached to 622.01 and 313.91 mg/g, which was 10–15 and 30–50 times that of the neat shell respectively. And shell-Mg has strong selectivity , which was approximately 2–4 times that of shell. The shell-Mg can be used to retrieve Pb 2+ and Cu 2+ from aqueous solutions efficiently. Another is that the carbonated exhausted-adsorbents (C-shell-Mg-Pb and C-shell-Mg-Cu) showed their potential photocatalytic degradation effects on congo red under pH = 4 condition, the decolorization rate reached to 61.19% and 80.39% respectively. Reuse of exhausted adsorbents can avoid the secondary pollution caused by the regeneration, extend the utilization value of exhausted adsorbents, and provide a new viewpoint for the reuse of spent bio-nanomaterial adsorbents.
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2024
·
IF 20.2
Xuli Hu,Zhen Zhang,Zhenyao Li,Yushan Wu,Wei Wei,Yao Wang,Junchen Xu,Mingyue Ding
Regulating oxidation state of Cu-based chalcogenides catalysts during electrolysis is of great significance for efficient CO 2 electrochemical reduction reaction (CO 2 RR) to methanol, which still remains a dramatic challenge. Herein, we construct a heterogeneous Cu 3 VS 4 /CuS electrocatalyst (denoted as CuV x S), in which the in-situ growing Cu-S-V bonds avoid the accumulated electrons on oxidized Cu sites and inhibit the deep reduction of CuS to metallic Cu during electrolysis, maintaining stable and abundant reactive Cu + /Cu 2+ species to promote CO 2 RR performance to methanol. By this design, the CuV 0.1 S catalyst achieves an ultrahigh methanol selectivity of 79.8 %. In-situ FTIR measurement reveals that the synergistic effect of Cu + /Cu 2+ species and Cu-S-V bonding facilitates the *CO adsorption and the subsequent *CO hydrogenation process, which improve the generation of *CHO and *OCH 3 intermediates for enhanced methanol selectivity. This work provides a new insight into stabilizing high oxidation state of Cu-based electrocatalyst to maintain sufficient active sites for CO 2 RR.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2026
·
IF 5.4
Rutong Song,Yurong Wu,Fei Zhong,Chunlin Chen,Zhikui Huang,Yaqi Ren,Wei Li,Jie Cao,Yichao Ding
Cu-doped PDA and PA were grafted onto GO to form a P-N-rich barrier (GPCu/PA). • Co-Fe/B nanosheets were grown on GPCu/PA to construct a hierarchical structure. • Multi-metal (Cu, Co, Fe) and boron synergistically enhance char formation and stability. • The hierarchical filler provides physical barrier, radical quenching, and catalytic charring. Water-based intumescent epoxy coatings for steel structures face challenges in simultaneously achieving high-efficiency flame retardancy, smoke suppression, thermal insulation, and long-term environmental durability. In this study, a hierarchical GPCu/PA/Co-Fe/B hybrid flame retardant was developed by sequentially grafting Cu 2+ -chelated polydopamine (PDA) and phytic acid (PA) onto graphene oxide (GO), followed by the in situ growth of Co-Fe/B nanosheets. This ingeniously designed structure integrates the layered barrier effect of GO, the catalytic charring capability of PDA and transition metal species, the phosphorus-promoted expansion effect of PA, and the protective effect of boron-containing compounds. Through these synergistic effects, the hybrid system facilitates the formation of a dense and stable char layer, thereby effectively suppressing heat conduction, oxygen diffusion, and the release of flammable volatiles during combustion. When incorporated into water-based epoxy coatings, just 2 wt% of GPCu/PA/Co-Fe/B significantly improves flame-retardant performance by reducing the back-surface temperature by 36.3%, increasing the char layer expansion height by 244.9%, and enhancing smoke suppression capabilities. The cone calorimeter test further confirmed the reduced heat release, smoke generation, and toxic gas emissions achieved by this coating, demonstrating its outstanding fire safety performance. Additionally, water immersion and UV-accelerated aging tests showed that even after environmental exposure, the coating maintained low water absorption, structural integrity, and flame-retardant properties, indicating excellent durability and weather resistance. This study provides a highly promising strategy for developing multifunctional, tiered flame-retardant systems for durable water-based intumescent coatings designed for fire protection of steel structures. Download: Download high-res image (370KB) Download: Download full-size image
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高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Wenyu Guo,Yuanyuan Zhang,Yunxuan Wang,Zhijun Hu,Peixuan Xu,Jingying Cai,Peirong Yu,Shiya Chen,Lei Zhang,Benmei Wei,Juntao Zhang,Sheng Li,Haibo Wang,Lingyun Chen
Peptides, which are hydrolysis products of proteins, are commonly utilized as nutritional supplements in food due to their high bio-safety profile. In this study, we present a novel water-soluble fluorescent probe derived from fish collagen peptides, termed Sali-Pep. This probe exhibits light green fluorescence, characterized by both aggregate-induced-emission (AIE) and excited state intramolecular proton transfer (ESIPT) mechanisms, with emission peaks at 480 nm and 522 nm. Furthermore, Sali-Pep demonstrates a high sensitivity towards Cu 2+ ions via a “turn-off” fluorescence mechanism, and towards Zn 2+ ions through a “turn-on” fluorescence mechanism, both in a dose-dependent manner. The detection limits of Sali-Pep were 1.49 × 10 −7 M for Cu 2+ and 4.23 × 10 −7 M for Zn 2+ , respectively. In real environmental and biological samples, the recoveries of Cu 2+ and Zn 2+ ions ranged from 91.14 % to 108.61 %. These findings indicate that Sali-Pep is a promising fluorescent probe for the detection of Cu 2+ and Zn 2+ ions, combining both high biosafety and low environmental risk. Additionally, this study also show that collagen-derived peptides have the potential to serve as AIE sensing platforms for metal ion detection and fluorescent labeling.
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高影响因子
FOOD CHEMISTRY
·
2025
·
IF 9.8
Zhao He,Jian Zhu,Xin Li,Guo-Jun Weng,Jian-Jun Li,Jun-Wu Zhao
Au@AuAg yolk-shell heterogeneous nanostructures (YSHNSs) with two major plasmonic absorption peaks of equal intensity are designed as multifunctional and multi-informational nanoprobes for detecting Cu 2+ and Hg 2+ , which are critical heavy metals threatening food safety and human health. By controlling the elemental distribution and morphological structure of Au@AuAg YSHNSs, two major absorption peaks can be accurately modulated. Since changing the thickness and composition ratio of Au@Ag alloy shell triggers a seesaw-like bidirectional conversion of two major absorption peaks, we establish the detection of Cu 2+ and Hg 2+ . The decrease and increase of intensity ratio of dual-peak show a good linear relationship with the concentration of Cu 2+ and Hg 2+ , with detection limits of 0.4 nM and 2 nM, respectively. This plasmonic nanoprobe based on Au@AuAg YSHNSs is successfully utilized for detecting Cu 2+ and Hg 2+ in various drinking water, providing a reliable solution for screening heavy metals with high specificity and sensitivity.
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PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2017
·
IF 3.133
Lei Meng,Bin Yao,Yongfeng Li,Zhanhui Ding,Zhenyu Xiao,Kaisi Liu,Gang Wang
The back contact adhesion is the important factor of the microstructural performance which can determine the optoelectronic properties of the kesterite-based solar cells. Here, we present a rational and effective strategy to significantly enhance the back contact adhesion of Cu 2 (Zn,Cd)Sn(S,Se) 4 (CZCTSSe) absorber layers by insetting the appropriate thickness carbon-doping CZCTS thin films . We chose the oleylamine as the carbon-doping reagent which can generate a small amount of carbon in the annealing process . The suitable thickness carbon-doping CZCTS films can significantly change the crystal growth mechanism of CZCTSSe absorber layers, and eliminate the holes in the back contact. The efficiency of CZCTSSe solar cells fabricated by insetting the appropriate thickness carbon-doping CZCTS films is above 7%, and shows the excellent repeatability and long-term air stability compared with the control devices.
研究领域:
材料科学
·
光伏技术
·
半导体物理
·
表面与界面工程
·
无机功能材料
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高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2023
·
IF 3.8
Mingya Wang,Shengling Li,Junli Shi,Yongzheng Liu,Duanlin Cao,Linxiu Zhao
A novel, highly sensitive “on-off-on” fluorescent probe ( E )- N ’-((1 H -imidazol-2-yl) methylene) -4-(5, 5-difluoro-1, 3, 7, 9-tetramethyl-5 H -4 λ 4 ,5 λ 4 -dipyrrolo [1, 2- c :2′, 1′- f ] [1,3,2] diazaborinin-10-yl) benzohydrazide ( BDB ) was developed in this study, and its structural and spectral properties were characterized by 13 C NMR, 1 H NMR, X-ray, ESI-MS, ultraviolet and fluorescence photometry. BDB could specifically and efficiently identify Cu 2+ among many other metal ions with a fluorescence quenching efficiency of 92.7% and a recognition limit of 0.65 μM in CH 3 CN/HEPES (7:3, v/v, pH = 7.23) buffer. The energy difference between BDB and BDB -Cu 2+ complex was calculated by DFT. The BDB -Cu 2+ complex could continuously identify GSH in the same system and show an obvious fluorescence enhancement response with a recovery efficiency of approximately 91% and a low recognition limit of 0.02 μM, which is significantly lower than the physiological concentration of GSH in living cells. The applicability of BDB is verified by the strip test. BDB can also be used to detect GSH in HeLa cells, which expand the application of fluorescent chemical sensors in biology.
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高影响因子
FOOD CHEMISTRY
·
2022
·
IF 9.231
Wei Zhong,Jin Zou,Qi Yu,Yansha Gao,Fengli Qu,Shuwu Liu,Hui Zhou,Limin Lu
The development of effective electrochemical methods for the determination of pesticide residues is highly desirable for food safety requirements. Herein, a novel electrochemical sensing strategy for indirect detection of thiabendazole (TBZ) was achieved by monitoring the anodic stripping peak signal change of media Cu 2+ induced by a significant activity difference between active Cu 2+ and inactive Cu 2+ -TBZ complexes. In this sensing system, a heterostructured Ti 3 C 2 T x -TiO 2 composite synthesized via a simple in-situ-oxidization strategy is used as the electrode material to boost the anodic stripping peak signal. After optimizing various conditions, the developed sensor presents satisfactory analytical performance for TBZ assay with a linear range from 0.3 to 100.0 nM and a limit of detection as low as 0.1 nM (S/N = 3). Furthermore, the proposed sensing platform also exhibits outstanding anti-interference, repeatability, and stability, which is effective for the determination of TBZ in fruit and water samples.
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PubMed
高影响因子
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