JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Qingguo Yu,Yimin Liu,Qingru Zeng,Yuxiang Yang,Shunyan Ning,Yuezhou Wei,Xinpeng Wang,Deqian Zeng
Photocatalytic technology provides key benefits in utilizing solar energy for H 2 production and pollutant removal, making the pursuit of efficient photocatalysts a vital area of focus. Herein, a novel p-n heterojunction photocatalyst was synthesized by loading ZnSe nanoparticles onto Cu 2−x Se nanoplates, creating an internal electric field that facilitates the efficient separation of charge carriers and significantly enhances photocatalytic activity. The 14 % Cu 2−x Se/ZnSe nanocomposite exhibits excellent photocatalytic performance, achieving an H 2 production rate of 1846 μmol·g −1 ·h −1 , roughly 34 times that of pure ZnSe. Additionally, the Cr(VI) reduction rate constant of nanocomposite was 0.0277 min⁻¹ , which is 20 times and 5 times higher than those of ZnSe and Cu 2−x Se, respectively. The Cu 2−x Se/ZnSe photocatalyst demonstrated exceptional stability and reusability during multiple cycles of H 2 production and Cr(VI) reduction. An in-depth examination of experimental data and density functional theory (DFT) calculations led to proposing a potential mechanism. This work introduces a simple synthesis method for ZnSe-based photocatalysts, offering a novel approach for the effective application of solar energy in environmental and energy fields.
研究领域:
材料科学
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环境科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Omega
·
2021
·
IF 3.512
Yida Huang,Youlong Liang,Chaoran Xie,Qingyuan Gui,Jinlei Ma,Hongxian Pan,Zeyu Tian,Lei Qi,Mei Yang
Ce1–xO2:x%Cu2+ nanobelts were bioinspired, designed, and fabricated using commercial filter papers as scaffolds by adding Cu(NO3)2 in the original sol solution of CeO2 nanobelts, which display excellent catalyst properties for CO oxidation and photocatalytic activity for organic dyes. Compared with pure CeO2, CuO belts were synthesized using the same method and the corresponding Ce0.5O2:50%Cu2+ bulk materials were synthesized without filter paper as scaffolds; the synthesized Ce1–xO2:x%Cu2+ nanobelts, especially Ce0.5O2:50%Cu2+ nanobelts, can decrease the reaction temperature of CO to CO2 at 100 °C with the conversion rate of 100%, much lower than the formerly reported kinds of Ce1–xO2:x%Cu2+ catalysts. Meanwhile, the synthesized Ce1–xO2:x%Cu2+ nanobelts also display better photocatalytic activity for organic dyes. All of these results provide useful information for the potential applications of the synthesized Ce1–xO2:x%Cu2+ nanobelts in catalyst fields.
研究领域:
材料科学
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环境科学
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催化化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NEW CARBON MATERIALS
·
2016
·
IF 0.993
Yue Wang,Wen-ting Wu,Ming-bo Wu,Hong-di Sun,Hui Xie,Chao Hu,Xue-yan Wu,Jie-shan Qiu
Yellow-visual fluorescent carbon quantum dots (CQDs) were prepared from petroleum coke by ultrasonic-assisted chemical oxidation and were used as label-free probes for Cu 2+ detection in water. The detection of Cu 2+ by CQD probes is related to a quenching of fluorescence by a photoinduced electron transfer mechanism. The quenched fluorescence of the CQDs by Cu 2+ can be recovered by adding ethylene diamine tetraacetic acid. The yellow-visual fluorescent CQD probes have a linear detection range from 0.25 to 10 μM, a detection limit of 0.0295 μM, a response time of 3 s, and a superior sensitivity and selectivity for Cu 2+ detection compared to other fluorescent probes. The CQDs are easy to prepare, economical, reusable, fast to respond and can be used in on-line detection.
研究领域:
化学
·
环境科学
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2024
·Vol. 14
·期 24
·2000
·
IF 4.4
Zhipeng Yu,Pengxu Yan,Yilei Sheng,Chengwei Zhang,Zhun Qiao,Qikui Fan,Chuncai Kong,Zhimao Yang
Copper-based materials, renowned for their redox versatility and conductivity, have extensive applications in electrochemical sensing. Herein, we construct stable Cu+/Cu2+interfaces within dual-valence copper nanostructures to achieve enhanced sensitivity in glucose sensing. By employing a hydrolysis method to tune Cu2+/Cu+ratios precisely, we achieved an optimal electrochemical interface with heightened stability and reactivity. The Cu+/Cu2+interface-based flexible electrode demonstrated excellent glucose sensitivity (332.4 µA mmol/L−1cm−2at +0.65 V), wide linear range (up to 10 mmol), a low detection limit of 1.02 nmol/L, and strong selectivity, including detection in human sweat, making this study significant for advanced electrochemical sensors.
研究领域:
材料科学
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生物医学工程
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2018
·Vol. 42
·期 21
·17478-17485
·
IF 3.201
Liying Yu,Yaoyao Qu,Fang Chai,Lihua Chen
The highly luminescent blue fluorescent carbon quantum dots (CQDs) were prepared via the one-step hydrothermal method using L-ascorbic acid (LAA) as a carbon source. The obtained carbon quantum dots (LAA-CQDs) demonstrated high sensitivity and selectivity for detecting Cu2+ and Hg2+ based on the efficient fluorescence quenching effect, with the lowest limits of 7.59 nM and 2.29 nM, respectively. Moreover, LAA-CQDs based paper sensors were fabricated, which showed a clear fluorescence response after being exposed to Cu2+ and Hg2+, with visual detection limits of 5 μM and 3 μM, respectively. The cyclic utilization of the paper sensors was realized by restoring their fluorescence after soaking them in saturated ethylene diamine tetraacetic acid solution. The sensors can be recycled to detect Cu2+ and Hg2+ ions for at least four turns, which was conducive to environmental protection and saving resources. The LAA-CQDs with good environmental applicability have been successfully applied for the detection of Cu2+ and Hg2+ ions in real environmental water samples. In addition, we verified the low toxicity and good biocompatibility of LAA-CQDs via cytotoxicity experiments and cell imaging.
研究领域:
环境科学
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
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2025
·
IF 4.7
Xiaojing Mao,Huachang Li,Yehong Shi,Jiemin Liu,Lijun Kuai,Jijun Liu,Yan Han,Yuexi Huang,Haijiao Xie
Two zinc-based metal-organic frameworks, namely [Zn(L 1 )(Phen)H 2 O] n ( 1 ) and {[Zn(L 2 )(Phen)]⋅(H 2 O)} n ( 2 ), were successfully constructed by mixed ligands strategy (HL 1 =1,4-benzendicarboxylic acid, Phen=1,10-phenanthroline monohydrate, HL 2 =5-hydroxyisophthalic acid), and characterized by X-ray single crystal diffraction, elemental analysis, powder X-ray diffraction (PXRD), etc. The X-ray single crystal diffraction demonstrate that both 1 and 2 show 1D chain structure. The orbital energies of 1, 2 and ligands have been investigated using the Density Functional Theory (DFT) calculations. The fluorescent sensing experimental revealed that both 1 and 2 exhibited excellent selectivity and sensitivity towards Cu 2+ and Co 2+ ions over other metal ions, and the detection limit (LOD) of Cu 2+ and Co 2+ for 1 were 0.077 μM and 0.15 μM, and the LOD of Cu 2+ and Co 2+ for 2 were 0.81 μM and 0.48 μM, respectively. In addition, the fluorescence quenching mechanism of Cu 2+ and Co 2+ can be attributed to energy competitive absorption. Furthermore, in the real sample detection, the recoveries of Cu 2+ and Co 2+ were 92.6 - 109.1 % and 96.7 - 110.0 %, respectively. This work provided a reliable method for the quantitative detection of Cu 2+ and Co 2+ and was successfully applied in river water with satisfactory recovery and precision.
研究领域:
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 30
·期 6
·15991-16002
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IF 5.19
Zhang Xueying,Liu Yonggang,Yu Yonghao,Wang Lifen,Lin Yinjun
Here, we report a simple and efficient strategy for evenly in situ growth of Cu 2 (OH) 3 F nanosheets on BiVO 4 spheres as a novel photo-Fenton-like catalyst using hydrothermal method. The Cu 2 (OH) 3 F/BiVO 4 composite catalysts showed great performance for the organic pollutants degradation under visible light irradiation due to the efficient electron transfer and copper species transformation. The synergetic between Cu 2 (OH) 3 F and BiVO 4 not only promoted the separation of electrons and holes but also enhanced the Cu 2+ reduction, thus produced more strong oxidative radicals under a wide pH value range. The activity of Cu 2 (OH) 3 F/BiVO 4 composite for methylene blue degradation was 6.03 and 5.47 times more than that of pristine Cu 2 (OH) 3 F and BiVO 4 , respectively. The composite catalysts were characterized with various methods and their stability and adaptability were also evaluated. Finally, a possible photo-Fenton-like reaction mechanism was also proposed based on the band structure/position and reaction species.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2023
·
IF 8.4
Ying Peng,Xiong Zhao,Menglu Li,Yin Yue,Chengying Pan,Taiyuan Li,Sha Ou,Zuquan Hu
The analysis of mesenchymal circulating tumor cells (CTCs) with enhanced migratory is important in the diagnosis and metastasis prediction of cancer. In this work, an efficient electrochemical biosensor has been proposed for the sensitive analysis of mesenchymal CTCs. In our design, the capture antibody modified on the electrode surface can specifically recognize cell-surface vimentin, which is a specific biomarker of mesenchymal CTCs. In the meantime, polycrystalline Cu 2+ -NMOFs with excellent mimic peroxidase property assembled by functional nucleic acids are used as the signal probes . After capturing the mesenchymal CTCs with the capture antibody, the cholesterol-labeled functional nucleic acids modified on the Cu 2+ -NMOFs polycrystalline structures can serve as an anchor to insert into the cell membrane while bringing the polycrystalline Cu 2+ -NMOFs to the surface of the electrode. Consequently, an obvious enhanced signal is generated for sensitive quantitative of mesenchymal CTCs ranging from 2 × 10 1 to 10 4 cell mL −1 with a detection limit of 5 cell mL −1 . Moreover, the biosensor can be applied to quantitative analysis of mesenchymal CTCs in blood samples of clinical bladder cancer patients with high selectivity and anti-interference ability, showing the great prospect for clinical cancer diagnosis.
研究领域:
生物医学工程
·
癌症诊断
·
分析化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Tianyao Jiang,Lixia Li,Longhua Li,Yanhong Liu,Dongxu Zhang,Dongqi Zhang,Haitao Li,Baodong Mao,Weidong Shi
Electrocatalytic nitrogen reduction reaction (NRR) has been considered as an efficient and environment-friendly alternative method for NH 3 production. However, the balance between selectivity and catalytic activity is still one of the biggest challenges for developing efficient electrocatalysts. Here, we propose a simple method for the preparation of Cu 2-x S/MoS 2 electrocatalysts via epitaxial growth of an ultra-thin MoS 2 layer on monodispersed Cu 2-x S quantum dots. The highest NH 3 yield of 22.1 µg h - 1 mg cat. -1 and Faraday efficiency of 6.06% were obtained at -0.5 V (versus reversible hydrogen electrode) on Cu 2-x S/MoS 2 -2.5% with an ultrathin MoS 2 shell (~1 nm). But it started to decrease with further Mo/Cu ratio increase to 5% and 10%, due to the competition of hydrogen evolution and subsequent reduction of the Faraday efficiency. Further mechanism studies demonstrate that the delicate core/shell structure regulation with an ultrathin MoS 2 shell can enhance the nitrogen adsorption capacity, electrochemical active surface area, and charge transfer rate. A plausible mechanism was proposed for NRR on the Cu 2-x S/MoS 2 core/shell catalysts, where the controllable ultrathin MoS 2 layer can effectively increase the NRR performance at the interface while avoiding the unwanted enhancement of hydrogen evolution. This work provides a paradigm for enhancing activity and selectivity through rational core/shell nanostructure engineering for the design of NRR electrocatalysts.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Materials Research Express
·
2019
·Vol. 6
·期 12
·125101
·
IF 1.449
Kai Huang,Lin Lin Guo,Dong Fang Wu
Different from the traditional aldimine condensation reaction, N-containing ligand: pyridine-2-formaldehyde was selected as the source of aldehyde group, and NH2-MIL-53(Al) containing a large number of amino functional groups was took as the carrier, transition metal Cu2+ coordinated with N-containing ligand to prepare a new and more stable MOFs catalyst named Cu@Al-MIL-53-P21. The catalyst exhibited a cross-linked nanorod morphology. The effect of the morphology on the catalytic oxidation activity of styrene was studied, the results showed that the catalyst could not only promote the production of benzaldehyde, but also inhibit the production of benzoic acid and phenylacetaldehyde. In addition, the optimal reaction conditions and the reaction mechanism were also discussed in this paper.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
Analytical Methods
·
2016
·Vol. 8
·期 41
·7516-7521
·
IF 1.915
Sheng Qiang Deng,Hong Yan Zou,Jing Lan,Cheng Zhi Huang
A novel method for sensitive melamine detection based on the aggregation-induced superior peroxidase-like activity of Cu2−xSe capped by sodium polystyrene sulfonate (PSS) (Cu2−xSe@PSS) nanoparticles has been developed. In the presence of melamine, Cu2−xSe@PSS nanoparticles aggregated and exhibited impressive peroxidase-like activity which can accelerate the oxidation of colorless 3,3′,5,5′-tetramethylbenzidine (TMB) to its blue product (oxidized TMB) with H2O2. The enhancement of the absorbance intensity of oxidized TMB at 650 nm showed a good linear relationship with the addition of melamine ranging from 4.7 nM to 29.7 μM. And the detection limit for melamine was as low as 1.2 nM, which was far below the safety limits of melamine ingestion (20 mM in the USA and EU; 8 mM in infant formula in China). Control experiments suggested that the enhancement in the peroxidase-like activity of aggregation for Cu2−xSe@PSS in comparison to its disperse nanoparticles resulted from the ˙OH or O2˙− radical generated.
研究领域:
分析化学
·
食品安全
·
纳米生物学
✓ 已验证
产品关联
DOI
高影响因子
ACS Sensors
·
2022
·
IF 9.618
Leilei Sun,Sisi Shi,Zeming Wu,Yao Huang,Chenhui Ji,Craig A. Grimes,Xinxin Feng,Qingyun Cai
A material system enabling specific NIR-II fluorescence imaging of Gram-positive bacteria is described. The material system is based on the electrostatic binding of Cu2–xSe and vancomycin-modified NaGdF4:Nd,Yb@NaGdF4 downconversion nanoparticles (DCNPs), the fluorescence of which is weak owing to the spectral overlap of Cu2–xSe absorption with the DCNP NIR emission. The presence of Gram-positive bacteria precisely disconnects the bond between vancomycin-modified DCNPs and Cu2–xSe, thus enabling a strong fluorescent signal. In vivo studies show that the material system can be specifically activated at the site of Gram-positive bacterial infection but is essentially nonfluorescent in the area of Gram-negative bacterial infection.
研究领域:
生物医学工程
·
材料科学
·
感染性疾病研究
✓ 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）