SOLAR ENERGY
·
2021
·
IF 5.742
Yulin Liu,Bin Xu,Xiaoshuang Lu,Xiatong Qin,Pingxiong Yang,Junhao Chu,Ye Chen,Lin Sun
Excellent crystallinity and uniform composition distribution of the Cu 2 ZnSn(S,Se) 4 (CZTSSe) absorber are indispensable factors for the fabrication of photovoltaic device with excellent performance. Here, a facile and effective method is developed to improve the composition uniformity of CZTSSe absorber. It is inspiring that by replacing the acetates with chlorides as the solutes in the precursor solution , the issue of the composition non-uniformity especially for the distribution of Cu and Sn, which is ascribed to the rich-carbon in the acetate-based CZTSSe absorber, is able to be avoided. Due to less organic residues and composition uniformity, the grain size and the crystallinity of absorber could be significantly enhanced, and the photovoltaic performance of chloride-based CZTSSe solar cell is improved remarkably. Furthermore, substituting CuCl 2 with CuCl as the copper source in the precursor solution is able to obtain a stable solution, and the quality of CZTSSe absorber is further improved. As a consequence, 8.48% efficient CZTSSe solar cell has been yield.
研究领域:
材料科学
·
太阳能电池
✓ 已验证
DOI
高影响因子
MICROCHIMICA ACTA
·
2016
·Vol. 183
·期 7
·2197-2203
·
IF 4.831
Hao Tongfan,Wei Xiao,Nie Yijing,Xu Yeqing,Yan Yongsheng,Zhou Zhiping
We on report an eco-friendly molecularly imprinted material based on carbon dots (C-dots) via a facile and efficient sol–gel polymerization for selective fluorescence detection of 4-nitrophenol (4-NP). The amino-modified C-dots were firstly synthesized by a hydrothermal process using citric acid as the carbon source and poly(ethyleneimine) as the surface modifier, and then after a sol–gel molecular imprinting process, the molecularly imprinted fluorescence material was obtained. The material (MIP-C-dots) showed strong fluorescence from C-dots and high selectivity due to the presence of a molecular imprint. After the detection conditions were optimized, the relative fluorescence intensity (F 0 /F) of MIP-C-dots presented a good linearity with 4-NP concentrations in the linear range of 0.2 − 50 μ mol L -1 with a detection limit (3σ/k) of 0.06 μmol L -1 . In addition, the correlation coefficient was 0.9978 and the imprinting factor was 2.76. The method was applicable to the determination of trace 4-NP in Yangtze River water samples and good recoveries from 92.6–107.3 % were obtained. The present study provides a general strategy to fabricate materials based on C-dots with good fluorescence property for selective fluorescence detection of organic pollutants.
An eco-friendly molecularly imprinted fluorescence sensor based on carbon dots (C-dots) (poly(ethyleneimine) (PEI) as the surface modifier) was prepared via a facile and efficient sol–gel polymerization (3-aminopropyltriethoxysilane (APTES) as the functional monomer and tetramethoxysilane (TEOS) as the cross linker) for selective fluorescence detection of 4-nitrophenol (4-NP).
研究领域:
环境科学
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材料科学
·
分析化学
✓ 已验证
DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2013
·
IF 4.387
Hongbo Li,Jing Li,Qin Xu,Zhanjun Yang,Xiaoya Hu
A novel visible light sensitized photoelectrochemical sensing platform was constructed based on the perylene-3,4,9,10-tetracarboxylic acid/titanium dioxide (PTCA/TiO 2 ) heterojunction as the photoelectric beacon. PTCA was synthesized via facile steps of hydrolysis and neutralization reaction, and then the PTCA/TiO 2 heterojunction was easily prepared by coating PTCA on nano-TiO 2 surface. The resulting photoelectric beacon was characterized by transmission electron microscope, scanning electron microscopy, X-ray diffractometry, FTIR spectroscopy, and ultraviolet and visible spectrophotometer. Using parathion-methyl as a model, after a simple hydrolyzation process, p-nitrophenol as the hydrolysate of parathion-methyl could be obtained, the fabricated derivative photoelectrochemical sensor showed good performances with a rapid response, instrument simple and portable, low detection limit (0.08 nmol L −1 ) at a signal-to-noise ratio of 3, and good selectivity against other pesticides and possible interferences. It had been successfully applied to the detection of parathion-methyl in green vegetables and the results agreed well with that by GC–MS. This strategy not only extends the application of PTCA, but also presents a simple, economic and novel methodology for photoelectrochemical sensing.
研究领域:
分析化学
·
环境科学
✓ 已验证
DOI
高影响因子
MICROCHIMICA ACTA
·
2016
·Vol. 183
·期 5
·1699-1704
·
IF 4.831
Chen Donghua,Peng Rulin,Zhou Hong,Liu Hui
Graphene oxide quantum dots (GOQD) are capable of enhancing the green chemiluminescence (CL) of the system composed of bis (2,4,6-trichlorophenyl) oxalate, hydrogen peroxide and fluorescein (TCPO/H 2 O 2 /fluorescein). It was found that 4-nitrophenol (4-NP) causes a further enhancement of the system, and this was exploited to develop a CL detection scheme for 4-NP. The optimum reaction concentrations were established, and under these conditions the calibration plot is linear in the 1.0 to 300 pmol L −1 concentration range, with a 0.3 pmol L −1 detection limit (at 3σ).We assume that CL enhancement is due to energy transfer from GOQD to fluorescein which is promoted by the interaction of 4-NP with the GOQD. The method was applied to the determination of 4-NP in spiked tap water and river water and gave recoveries between 93.4 and 107.9 %, with relative standard deviations of <4.0 %.
Graphene oxide quantum dots (GOQD) are good enhancer of Bis(2,4,6-trichlorophenyl) oxalate (TCPO) and hydrogen peroxide chemiluminescence (CL) system. The CL emission of fluorescein can be further enhanced by GOQD and this provides an extremely sensitive detection platform for 4-nitrophenol (4-NP).
研究领域:
分析化学
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环境科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 75
·71431-71440
·
IF 3.289
Di Lu,Lele Wen,Lixin Xue
For exploring more types of suitable polymeric membranes for application in alkaline fuel cells (AFCs), a series of 1,2-dimethylimidazolium functionalized poly(arylene ether sulfone)s containing 4-phenyl-pyridine units in the main chain (named as DIm-PPYPAES) were firstly synthesized as anion exchange membranes (AEMs) in this work. Proton nuclear magnetic resonance (1H NMR) and Fourier transform infrared (FT-IR) spectroscopy were employed to characterize and confirm the chemical structure of the synthesized copolymers and the derived membranes. The DIm-PPYPAES membranes with different ionized levels ranging from 1.15 meq. g−1 to 1.77 meq. g−1, exhibited good thermal stability, solubility behavior and a relatively high level of hydroxide conductivity. The highest hydroxide conductivity of 83.35 mS cm−1 at 80 °C was achieved for the DIm-PPYPAES-4 membrane with a moderate IEC of 1.77 meq. g−1. Moreover, after 15 days of treatment with a 2 M NaOH solution at 60 °C, the DIm-PPYPAES membrane still exhibited relatively high ionic conductivity even above 10 mS cm−1 at 30 °C and retained their integrated shapes.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
·
2020
·Vol. 34
·期 10
·e5814
·
IF 3.14
Yongcen Lin,Xue Dong,Lang Zhao
N-ZIF-(1:0)@NiCo-LDH, N-ZIF-(1:3.5)@NiCo-LDH and N-ZIF-(0:1)@NiCo-LDH were prepared by mixing solvents in various volume ratios ( V methanol : V water = 1:0, 1:3.5 and 0:1) when synthesizing precursors. These composite materials were characterized using scanning and transmission electron microscopies, X-ray diffraction, X-ray photoelectron spectroscopy and nitrogen adsorption–desorption measurements, and investigated as catalysts for reduction of 4-nitrophenol, methyl orange and methylene blue. The NaBH 4 concentration as an important factor that may affect catalytic activity for reduction of 4-nitrophenol was examined. Under optimal experimental conditions, the excellent catalytic activity of the N-ZIF-(0:1)@NiCo-LDH composite, compared to that of N-ZIF-(1:0)@NiCo-LDH and N-ZIF-(1:3.5)@NiCo-LDH composites, could be attributed to the presence of graphitic nitrogen. In addition, compared with previously reported catalysts, all catalysts prepared show excellent catalytic activity owing to the unique structure exposing more active sites.
研究领域:
材料科学
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环境化学
·
催化化学
✓ 已验证
DOI
高影响因子
APPLIED CLAY SCIENCE
·
2018
·
IF 3.641
Junhua Zhang,Zhaoli Yan,Liangjie Fu,Yi Zhang,Huaming Yang,Jing Ouyang,Deliang Chen
Acid-activated sepiolite nanofibers (ASep) were organically modified with (3-aminopropyl) triethoxysilane (APTES) to produce the amino-functionalized nanofibers (NH 2 -ASep). Due to the amino groups, highly dispersed silver nanoparticles (AgNPs) were assembled on the surface of NH 2 -ASep by a simple chemical reduction approach, and the AgNPs were smaller than those directly deposited onto ASep surface. The as-synthesized Ag/NH 2 -ASep nanofiber catalysts exhibited an excellent catalytic activity in the reduction process of 4-nitrophenol to 4-aminophenol with full conversion within 150 s in the presence of NaBH 4 as the reductant . The results indicated that Ag/NH 2 -ASep nanofiber catalysts exhibited excellent catalytic activities because the highly dispersed of small-sized AgNPs were exposed on the surface of highly dispersed nanofibers with amino functional groups, allowing effective contact with the reactants and catalysis of the reaction. Moreover, the Ag/NH 2 -ASep nanofiber catalysts are stable and easy to use for the catalytic reaction due to their one-dimensional nanofiber structure with functional amino groups.
研究领域:
材料科学
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纳米技术
·
环境催化
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无机化学
·
应用化学
✓ 已验证
DOI
高影响因子
Analytical Methods
·
2018
·Vol. 10
·期 45
·5372-5379
·
IF 2.073
Odoom Jibrael Kingsford,Junjuan Qian,Depeng Zhang,Yinhui Yi,Gangbing Zhu
The occurrence of 1-chloro-4-nitrobenzene (CNB) in the environment due to increased agricultural and economic activities worldwide has been a serious concern for various environmental agencies; hence the qualitative and quantitative determination of CNB is of great significance. In this study, we took into consideration the features of carbon nanohorns (CNHs), such as high surface area and electron transfer ability, and β-cyclodextrin (β-CD), such as high host–guest recognition ability with a hydrophilic outer layer, to design a highly sensitive electrochemical sensor for detecting CNB by preparing CNHs and β-CD nanohybrids through a simple ultrasonication process. The outcome of our study revealed that the CNHs/β-CD nanohybrid modified electrode is an excellent electrochemical sensor for CNB. Under the optimized conditions, the experimental results show a considerable linear response range, unsubstantial interference from familiar organic and inorganic compounds and a detection limit of 9.0 nM.
研究领域:
环境科学
·
分析化学
·
纳米科技
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电化学
·
污染物检测
✓ 已验证
DOI
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2025
·
IF 6
Xinliang Liu,Kuan Cai,Ziyi Zhong,Jiulong Sha,Xingxiang Ji,Parikshit Gogoi,Hainong Song,Shuangfei Wang,Jinge Guo
The peroxydisulfate (PDS)-based advanced oxidation process (AOP) has attracted great attention as an effective technique for oxidatively decomposing organic pollutants. g-C 3 N 4 , an excellent photocatalyst, has been studied to activate PDS, but the rapid photogenerated electron-hole recombination severely impedes its photocatalytic performance. Herein, highly efficient point-defect engineering by doping atoms as well as vacancies was adopted to modulate photoinduced exciton dissociation kinetics. We successfully synthesized C-doped carbon nitride (xC-g-C 3 N 4 ) by a one-step copyrolysis method using glucose and melamine as raw materials. C-doped carbon nitride can act as an electron bridge for electron transfer, leading to xC-g-C 3 N 4 with a wider light absorption range (from 475 nm to 527 nm), narrower band gap (from 2.76 eV to 2.66 eV) and higher charge separation efficiency (from 3.79 μA/cm 2 to 3.22 μA/cm 2 ). The enhanced visible light absorption performance and the reduced electron-hole pair recombination rate of xC-g-C 3 N 4 can efficiently initiate PDS. The obtained xC-g-C 3 N 4 catalyst exhibited superior photocatalytic activation performance of PDS for 4-CP degradation under visible light illumination. The degradation rate of 4-CP reached 88.3 %, with a total organic carbon (TOC) removal rate of approximately 87.9 %, which increased by 67.9 % and 160 %, respectively. This study highlights a new effective method of carbon doping in g-C 3 N 4 for activating PDS in the degradation of 4-CP.
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
Progress in Natural Science-Materials International
·
2025
·
IF 7.1
Jie Li,Zhangyue Zheng,Yuehong Huang,Liu He,Hongying Guo,Chunzheng Wu,Wei Liu,Weiwei Huan
The serious problems caused by water contamination call for efficient treatment. The catalytic reduction of 4-nitrophenol (4-NP) by NaBH 4 in solution is a convenient way to convert 4-NP to 4-aminophenol (4-AP), which is a precious intermediate for manufacturing of important materials such as pharmaceuticals. In the present study, the Co modified MoS 2 supported Au nanoparticles (Au/Co-MoS 2 ) is proved to be an efficient catalyst for the reduction of 4-NP. With the introduction of cobalt, the catalytic activity is improved obviously compared to Au/MoS 2 . When Co:Mo is 2:8 (mol), the Au/CoMoS 2 (2/8) catalyst exhibits the highest activity. The kinetics of the catalytic reactions were studied by the plot of ln(C t /C 0 ) against reaction time and the k app for Au/CoMoS 2 (2/8) is 1.063 min −1 . The characterization of the catalysts shows that the addition of cobalt can create more crystal defects, promote the exposure of active edge sites, facilitate the surface of catalysts to be more reactive.
研究领域:
环境科学
·
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
·
2015
·
IF 3.615
Shuang Fan,Yi Luan,Jingjing Wang,Hongyi Gao,Xiaowei Zhang,Ge Wang
A novel ferric chloride immobilized poly(4-vinylpyridine) (P4VP) catalyst was developed via a coordination chemistry-based approach. The pyridine moiety of poly(4-vinylpyridine) spheres functioned as the nitrogen donor to bind iron ions, as well as to decrease the amount of pyridine used in the catalytic reaction system. The monodispersed catalyst was well dispersed in the organic solvent during the catalytic procedure, taking advantage of its nanomorphology and uniform size. The catalytic activity of various monodispersed catalysts based different mass fractions of the divinylbenzene (DVB) was investigated, meanwhile the capacities of supported Fe(III) in the various catalysts were also discussed. The P4VPDVB 10% -Fe(III) catalyst exhibited high catalytic activity in the benzylic oxidation of benzylic methylenes and secondary benzylic alcohols. It was easily separated from the reaction system and reused several times without obvious degradation of catalytic activity. Moreover, leaching tests suggested that the as-synthesized P4VPDVB 10% -Fe(III) catalyst was a true heterogeneous catalyst without significant metal leaching.
研究领域:
化学
·
催化材料科学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Shuaiqian Wang,Baoji Miao,Muhammad Shahid Nadeem,Huaizhi He,Yao Zhao,Muhammad Yasir,Qiuling Chen,Guoqin Liu,Jinbo Bai
This study successfully prepared a novel high-entropy MAX phase (Ti 1/4 V 1/4 Zr 1/4 Nb 1/4 ) 2 AlC and conducted a comprehensive investigation of its microwave absorption performance. The material was synthesized using a pressure less sintering method, and by optimizing the selection of raw materials and synthesis processes, high purity, and excellent microwave absorption performance were achieved. The composition, structure, morphology, and electromagnetic parameters of the material were analyzed in detail using characterization methods such as XRD, SEM, EDS, TEM, XPS, and vector network analyzer (VNA). Experimental results exhibit that (Ti 1/4 V 1/4 Zr 1/4 Nb 1/4 ) 2 AlC can achieve a lowest RL of -62.56 dB at a thickness of 2.25 mm with frequency of 13.26 GHz, demonstrating outstanding microwave absorption capabilities. The study also explored the microwave absorption mechanisms of grown material, including conductivity, dipole polarization relaxation processes, internal lattice defects, and magnetic loss. This research not only delivers new approaches and development of effective microwave absorption materials but also lays the foundation for subsequent studies on MXene and more multi-element high-entropy MAX phase materials.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）