DYES AND PIGMENTS
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2021
·
IF 4.889
Chunyu Yu,Danyang Zhang,Qi Zhu,Daiyong Chao,Hua Liu,Liang Zhou
In this work, hydroquinone, o -phenylenediamine and terephthalic acid were used as reaction precursors to synthesize carbon dots (h-CDs) by a one-step solvothermal method. Our experimental results demonstrated the as-prepared functionalized h-CDs have not only excellent optical properties but also interestingly chemical and physical properties. The emission peak of the obtained h-CDs shifts gradually towards the red region with increasing water content in organic solvent . This was visually manifest as a change in color. Therefore, the h-CDs can be used as the colorimetric fluorescent probe to detect water content in organic solvents. Moreover, it is also particularly sensitive to Cu 2+ and thus could be used as fluorescent probe to detect Cu 2+ content in water with detection limit of 1.8 × 10 −4 mmol. This investigation provides a new way for the development of carbon dots (CDs) as multifunctional fluorescent probes.
研究领域:
化学
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材料科学
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Min Li,Chao Shen
In order to improve the photothermal conversion performance of a phase change material (PCM) PEG2000, a photothermal conversion material Cu 2-x S was introduced to enhance its light absorbance. The influence of S/Cu stoichiometry and Fe 3+ doping modification ratio on the photoabsorption performance of Cu 2-x S was studied. The composite with photothermal conversion performance was obtained by combining PEG2000. The results show that Cu 2-x S (S2) doped with Fe/Cu stoichiometry ratio of 0.3:1 exhibits the best light absorption performance. Moreover, a small amount of additive of the modified Cu 2-x S (Cu 2-x Fe y S, 1.0 wt%) can greatly increase photothermal conversion and energy storage efficiency. The prepared composite can meet the practical application in the field of solar photothermal conversion.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2025
·
IF 9.5
Yi Chen,Weilin Shi,Claudia Li,Kang Hui Lim,Xueqian Wang,Langlang Wang,Ping Ning,Yixing Ma,Sibudjing Kawi
Global warming, driven by rising levels of CO2 in the atmosphere, is an environmental predicament confronted by humanity. Plasma catalytic decomposition of carbon dioxide into carbon monoxide is a practical approach to mitigate this challenge, which can be a crucial step in carbon recycling. Metal selenides are promising candidates owing to their abundant reserves and outstanding electron transfer properties, making them highly active in chemical reactions. In this study, the morphology of AlO(OH) and the dispersion of Cu2−xSe were optimized by hydrothermal synthesis temperature. Specifically, the Cu2−xSe-Al-180 catalyst, prepared at a hydrothermal temperature of 180 °C, formed AlO(OH) with good crystallinity and a nanoscale thin-sheet structure, with Cu2−xSe uniformly distributed on the AlO(OH) support. The reaction of CO2 decomposition to CO production by integrating Cu2−xSe-Al-180 with dielectric barrier discharge (DBD) plasma led to a CO2 conversion of up to 28.07% at a specific input energy (SIE) of 58.07 kJ L−1. The excellent CO2 adsorption properties of AlO(OH) and Cu2Se reduce the activation energy barrier of the reaction, and Cu2Se further promotes the excited activation of CO2 in the plasma. These findings offer valuable insights for the development and design of catalysts in the field of plasma catalysis and highlight the potential of CuSe-based materials in CO2 reduction technologies.
研究领域:
环境科学
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材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Micro & Nano Letters
·
2015
·Vol. 10
·期 12
·689-692
·
IF 0.853
Jun Zhu,Xiufang Xu,Maomao Yao,Yiqun Zheng,Shifeng Hou
A facile approach to producing silver (Ag) microspheres with a porous structure via a one-pot synthesis is described. The success of this work relies on the use of Cu 2+ to mediate the reduction of silver chloride by oleylamine. The type of additives, amount of copper(II) chloride, type of Ag precursor and reaction temperature were systematically investigated to reveal their roles in the formation of the unique porous structure. The method described provides a convenient route for fabricating porous Ag micro/nanocrystals and could be potentially extended to similar synthesis of other noble metals.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2014
·
IF 2.354
Yaohui Xu,Yang Zhou,Ruixing Li
An available route was provided for simultaneous detection and effective adsorption toward Cd 2+ , Zn 2+ and Cu 2+ . The magnetic Fe 3 O 4 @SiO 2 nanoparticles were prepared and functionalized with N-(quinoline-8-yl)-2-(3-triethoxysilyl-propylamino)-acetamide (QTPA) by first using the “grafting from” method, which made the whole process of surface modification on Fe 3 O 4 @SiO 2 nanoparticles simpler and more effective. The as-synthesized QTPA functionalized Fe 3 O 4 @SiO 2 nanoparticles exhibited different fluorescence responses for Cd 2+ (doderblue), Zn 2+ (deepskyblue) and Cu 2+ (tomato red) illuminated under a 365 nm UV light, while other ions, such as Ag + , Hg 2+ , Ni 2+ , Co 2+ , Mn 2+ , Pb 2+ , Cr 3+ and Fe 3+ , gave no visible changes under identical experimental conditions. The eye-perceived fluorescent changes only toward Cd 2+ , Zn 2+ and Cu 2+ could serve as the available proofs for the qualitative analysis of the three cations. The UV–vis spectra results showed that the multifunctional nanoparticles exhibited fluorescence enhancements for Cd 2+ and Zn 2+ , and fluorescence quenching for Cu 2+ . The adsorption experiments showed that the nanomaterial was a good candidate for selective removal and enrichment of Cd 2+ , Zn 2+ and Cu 2+ , and had the high adsorption efficiency toward Cd 2+ (95.29%), Zn 2+ (92.37%), and Cu 2+ (91.06%). Moreover, the functionalized composites had strong magnetic sensitivity, which could make them susceptible in an external magnetic field, and easy to separate from the solid and liquid phase. More specific to this work, simultaneous fluorescence determination of Cd 2+ , Cu 2+ , and Zn 2+ by naked eye was proposed based on QTPA functionalized Fe 3 O 4 @SiO 2 nanoparticles.
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
JOURNAL OF MOLECULAR LIQUIDS
·
2022
·
IF 6.633
Chaojian Zhang,Tianrui Yang,Junsheng Liu,Qianqian Duan,Jiahui Song,Youjun Yin,Hansong Wang
Novel poly(ethylene imine) (PEI) modified chitosan-based hybrid membranes (PMCHMs) were created via a soft chemistry method, in which unmodified chitosan (CS) firstly reacted with PEI to produce a CS-PEI precursor. Later, such CS-PEI precursor was blended with silicone to create the membrane solution of PMCHMs. Finally, PMCHMs could be obtained via phase-inversion process. Multi-component sorption of Pb 2+ , Cu 2+ and Ni 2+ on PMCHMs in metal mixed solutions, such as, Pb 2+ &Cu 2+ and Pb 2+ &Ni 2+ binary, Pb 2+ , Cu 2+ and Ni 2+ ternary, as well as Pb 2+ , Cu 2+ , Ni 2+ , Cd 2+ and Cr 3+ quintuple mixed solutions, was inspected. The calculation of effective diffusion coefficients, distribution coefficients and selectivity coefficients showed that Pb 2+ sorption on PMCHMs had excellent selectivity in these mixed multi-metal solutions. While, the calculation of activation energy proved that Pb 2+ , Cu 2+ and Ni 2+ sorption on PMCHMs was a physic-sorption process Also, mechanism insight reveals that Pb 2+ sorption on PMCHMs could be depicted via Lagergren pseudo-2nd-order kinetic model and Langmuir or Freundlich isotherm equation. Exclusively, intra-particle diffusion process was discussed in detail. Desorption testing verified that HCl is a good desorbent for metals sorption on PMCHMs and the cycle time of membranes can arrive at 6 times. These results demonstrate that PMCHMs can be used to preferentially eradicate Pb 2+ from metal mixture solutions, showing prospective applications in the treatment of metal mixture wastewater from waste vehicle power-battery and other various metal-bearing polluted water.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF CATALYSIS
·
2024
·
IF 6.5
Ke Liu,Lixiang Shi,Yaxin Guo,Shiduo Hao,Yunpu Zhai,Yonggang Liu
Cu-based Fenton-like systems have demonstrated high effectiveness in the degradation of organic pollutants, however, challenges still exist to overcome the sluggish cycling of metal ions and fast activation of reactants. Herein, a novel n-p type Cu 2 (OH) 3 F/Cu 2 O photo-Fenton-like catalyst (CFC) was prepared with in-situ reduction of Cu 2 (OH) 3 F and applied for tetracycline hydrochloride degradation. Under optimized condition, the target catalyst (CFC-5) showed excellent activity, achieving a degradation efficiency of approximately 99.93 % in 30 min. The reaction rate constant with CFC-5 was 4.10 and 3.26 times higher than that of Cu 2 (OH) 3 F and Cu 2 O, respectively. Moreover, the Cu 2 (OH) 3 F/Cu 2 O catalyst exhibited highly cycling stability and broad applicability. The results illustrate that construction of Cu 2 (OH) 3 F/Cu 2 O composites facilitates the charge separation and enhances Cu 2+ /Cu + cycling, which benefits the generation of highly oxidizing active species and thus significantly improved the degradation efficiency. Besides, this study offers a versatile method to construct inexpensive and efficient photo-Fenton-like heterojunction catalysts.
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
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2022
·
IF 24.319
Jing Wang,Bingxin Guo,Junting Sun,Yingshuang Zhou,Chengfei Zhao,Zhongzhe Wei,Junjie Guo
The design and construction of electrocatalysts with multiple components to modulate the intrinsic catalytic activity is a compelling strategy to achieve Pt-like activity for hydrogen generation. Challenging on the inert Cu-based electrocatalysts for water reduction, herein, a novel and fruitful CuRu-based electrocatalysts (RuCuO x /NC) is established by combining dual-templates assembling and pyrolysis protocol with a subsequent hot-alkali corrosion. Benefitting from the synergetic effect of Cu 2+1 O (with copper excess defects) and Ru, the as-prepared RuCuO x /NC affords brilliant activity and stability under alkaline condition. In 1 M KOH, the RuCuO x /NC provides Pt-like activity with overpotential of ∼29 mV to reach 10 mA cm −2 . Theoretical calculations certified that H 2 O dissociation was accelerated and hydrogen adsorption free energy was optimized by the cooperation of Cu 2+1 O and Ru. This work proposes a promising methodology to construct multi-components electrocatalysts, which may lend perspective for the design of advanced electrocatalysts for renewable energy systems.
研究领域:
材料科学
·
可再生能源
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2019
·
IF 4.191
Wei Guo,Hui He,Hongxiang Zhu,Xudong Hou,Xingjuan Chen,Shile Zhou,Shuangfei Wang,Lingtao Huang,Jiehan Lin
A biomass cellulose-based colorimetric sensor for Ag + and Cu 2+ was prepared by grafting 2,5-dithiourea (DTu) onto biomass-pulp cellulose. The as-prepared sensor (cellulose-DTu) showed excellent selectivity and sensitivity towards Cu 2+ over other common metal ions (Pb 2+ , Mn 2+ , Mg 2+ , Zn 2+ , Hg 2+ , K + , Al 3+ , Ca 2+ , Na + , Cd 2+ , Ni 2+ , Ba 2+ , and Li + ), exhibiting a color change from white to light grey. However, the sensor exhibited a remarkable color change from white to yellow-red upon the addition of Ag + . The naked-eye-detection concentration limits for Ag + and Cu 2+ were 10 −3 and 10 -4 mol/L, respectively. Furthermore, cellulose-DTu responded to both Ag + and Cu 2+ within 5 s. A mechanism for the selective identification of Ag + and Cu 2+ by cellulose-DTu was proposed based on 13 C solid NMR, XPS, and TEM analyses. In addition, the application of cellulose-DTu in real water confirmed that it exhibits the advantages of simplicity, rapidity, and high selectivity for in-situ identification of Ag + and Cu 2+ .
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Crystals
·
2023
·Vol. 13
·期 5
·812
·
IF 2.7
Yuanyuan Xiong,Mengxiao Chen,Zhen Mao,Yiqing Deng,Jing He,Huaixuan Mu,Peini Li,Wangcai Zou,Qiang Zhao
Carbon dots have drawn extensive attention in the detection of metal ions with good stability, excellent biocompatibility and low toxicity. Meanwhile, the quantum yield, response rate and the detection mechanism for Cu2+ions are vital to their development and application. To obtain more selective and sensitive materials to detect Cu2+ions, N-doped carbon dots (DN-CDs) were synthesized by a one-step hydrothermal method using citric acid as the carbon source and diethylenetriamine (DETA) as the nitrogen source. The obtained DN-CDs exhibited stable and intense blue light emission and special near-infrared up-conversion fluorescence at 820 nm, attributed to the effect of introducing N atoms into the structure of carbon dots. Due to the dynamic quenching of the DN-CDs by Cu2+ions, the fluorescence intensity (λex = 820 nm) of DN-CDs was quantitatively decreased in the presence of Cu2+ions. The DN-CDs had a rapid response within 3 min. The DN-CD system exhibited a linear relationship with a concentration range from 2.5 to 50 µM and low detection limit (LOD) of 42 nM. After careful investigation, an interesting conclusion was proposed: N-doped CDs with N/O = 1:1 or higher with relatively abundant N atoms prefer to detect Cu2+ions while those with N/O = 1:2 or lower prefer to detect Fe3+ions.Keywords:carbon dots;up-conversion fluorescence;Cu2+ions detection
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
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Jie Zhang,Chenhui Qiu,Lei Wang,Ruijie Chen,Jing Ding,Jinfeng Zhang,Hui Wan,Guofeng Guan
Photocatalytic CO 2 reduction presents a promising strategy to alleviate environmental issues caused by massive CO 2 emissions. SrTiO 3 , a potential photocatalyst for photocatalytic CO 2 reactions, is limited by poor photoresponsivity and fast photogenerated carrier recombination. In this work, a series of Cu 2+ species modified SrTiO 3 nanofibers (xCuO/STO) was prepared combining sol-gel method and electrospinning with different copper content. The CH 3 OH yield of the 0.08CuO/STO photocatalyst reached up to 5.75 ± 0.27 μmol g −1 h −1 , which was 2.2 times higher than that of pure SrTiO 3 . It was attributed that the blend electrospinning promoted Cu 2+ species to be well dispersed on the surface of the SrTiO 3 nanofibers. The strategy effectively enhanced the light absorption of the photocatalyst and inhibited the recombination of the photogenerated carriers. Part of appropriate characterizations were employed to elucidate the above point. In addition, to explore the inherent mechanism between the two species, the Density Functional Theory (DFT) calculations were further applied in the inherent mechanism between the species. This work provided a blend electrospinning approach for designing cocatalyst-modified SrTiO 3 nanofibers for photocatalytic reduction of CO 2 .
研究领域:
材料科学
·
环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF FLUORESCENCE
·
2024
·
IF 2.6
Pang Shukui,Yu Yanchao,Yan Xuexue,Wu Mianyuan,Liu Qiye,Zu Panru,Wu Canyao
A novel coumarinylhydrazone fluorescent probe L was designed and synthesized from 4-(diethylamino)salicylaldehyde, its structure was characterized by NMR, IR. Fluorescence emission spectra showed that in ethanol solution, probe L could form a 1:1 complex L-Cu 2+ with Cu 2+ to realize the "turn-off" detection of Cu 2+ with high specificity and sensitivity (3.7 × 10 –7 mol/L). Meanwhile, the complex L-Cu 2+ had a specific fluorescence-enhanced response to HPO 4 2− with a detection limits down to 5.6 × 10 –7 mol/L and was resistant to the effects of many common anions (NO 2 − , N 3 − , CO 3 2− , SO 3 2− , HPO 4 2− , I − , Br − , F − , HCO 3 − , SO 4 2− , NO 3 − , Cl − , CH 3 COO − , Cr 2 O 7 2− , S 2 O 3 2− , P 2 O 7 4− ). Detection mechanism could be HPO 4 2− captured Cu 2+ of the complex and released the free ligand L. At last, the complex L-Cu 2+ was successfully applied to the determination of HPO 4 2− in different environmental water samples, and the spiked recoveries ranged from 98.05% to 108.18% and the relative standard deviations of 0.75% ~ 2.9%, which had good application prospects. Graphical A new coumarin acyl hydrazone fluorescent probe L was designed and synthesized, which could specifically recognize Cu2+ and HPO42- in a relay manner. In addition, the probe had good prospects for practical applications.
研究领域:
分析化学
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
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