ELECTROCHIMICA ACTA
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2017
·
IF 4.798
Jun-fei Long,Qian Tang,Zhen Lv,Chun-rong Zhu,Xiang-kai Fu,Cheng-bin Gong
This study aims to achieve dual-color properties for pyridinium-salt-based electrochromic materials. A novel series of 4′-(4-alkyl ester)-4,2′:6′,4″-terpyridinium derivatives were designed and synthesized through the introduction of an ester group onto the benzene ring of 2,4-di(4-pyridyl)-4-benzylpyridinium derivatives. Dual-electrochromic devices based on these compounds were fabricated. Multiple shades of green and yellowish green colors were obtained by changing the type of carboxylic acids and the nitrogen substituents. The type of carboxylic acids and the nitrogen substituents significantly influenced their electrochromic properties. 4′-(4-Alkyl ester)-4,2′:6′,4″-terpyridinium derivatives show good electrochromic properties such as high coloration efficiency, reasonable contrast, satisfactory optical memories, and redox stability. The dual-electrochromic materials are promising candidates for applications in electrochromic display systems.
研究领域:
材料科学
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化学
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DOI
高影响因子
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
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2024
·Vol. 112
·期 1
·152-161
·
IF 2.3
Zhang Enlei,Chen Jiaojiao,Xu Rui,Song Xiaowen,Zhang Bengui,Wang Guosheng
Catalytic reduction of 4-nitrophenol (4-NP) into 4-aminophenol (4-AP) is an important method for treating toxic nitroaromatic pollutant. In this work, amorphous CoSn(OH) 6 nanocubes were synthesized by coprecipitation and calcination methods for 4-NP photocatalytic reduction. The crystal structure, morphology and optical property of the samples were characterized by XRD, SEM, TEM, XPS, and UV–vis DRS. The amorphous CoSn(OH) 6 nanocubes showed excellent photocatalytic performance in 4-NP reduction. The effects of catalyst dosage, 4-NP concentration, and sodium borohydride concentration on the conversion rate of 4-NP were investigated. The results showed that the conversion rate of 4-NP could reach 98.38% in 15 min at room temperature under visible light irradiation. After five cycles of experiments, the conversion rate of 4-NP remained above 90%, indicating the good catalytic stability of the amorphous CoSn(OH) 6 nanocubes. Finally, the mechanisms of photocatalytic reduction on amorphous CoSn(OH) 6 nanocubes are also discussed. The successful preparation of amorphous CoSn(OH) 6 nanocubes may enable the widespread use of amorphous polymetallic oxides for the removal of nitrophenols from wastewater in the future. Graphical Abstract Amorphous CoSn(OH) 6 nanocubes exhibit superior photocatalytic reduction 4-NP to 4-AP performance.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
MICROCHIMICA ACTA
·
2019
·Vol. 186
·期 4
·1-10
·
IF 5.479
Luo Shiqing,Miao Yanming,Guo Junping,Sun Xiaojie,Yan Guiqin
Mesoporous molecularly imprinted polymers (MIPs) containing mangnanese-doped ZnS quantum dots (Mn-ZnS QDs) were prepared for specific recognition and detection of 4-nitrophenol (4-NP). The Mn-ZnS QDs display orange room-temperature phosphorescence with excitation/emission peaks at 295/590 nm and a decay time of 2.0 ms. In the presence of 4-NP, the orange phosphorescence is strongly reduced. Phosphorescence drops linearly in the 0.1–100 μM 4-NP concentration range, and the detection limit is 60 nM. The detection limit is far lower than the maximally allowed 4-NP concentrations in surface water and drinking water as specified by the U.S. Environmental Protection Agency. The intraday ( n = 5) and interday ( n = 6) spiked recovery rates were 96.0–104.5% and 97.9–107.9%, respectively, with relative standard deviations of 0.7–4.8% and 1.8–7.5% respectively. These MIPs integrated the characteristic features of phosphorimetry and molecular imprinting. Potential interference by competitive substances, background fluorescence or scattered light are widely reduced.
Schematic presentation of the synthesis of phosphorescent molecularly-imprinted polymers. A novel probe with manganese-doped ZnS quantum dots (Mn-ZnS QDs) and 3-aminopropyl-triethoxysilane (APTES) as functional monomers and tetraethoxysilane (TEOS) as crosslinking agent was prepared for selective phosphorescence detection of 4-nitrophenol (4-NP).
研究领域:
分析化学
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环境科学
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DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2022
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IF 7.968
Kun Wang,Xun Zhu,Yang Yang,Dingding Ye,Rong Chen,Qiang Liao
4-Nitrophenol (4-NP) is one of the most difficult treated water pollutants in industrial wastewater . Herein, the silver nanoparticle/polydopamine (Ag-PDA/PDMS) composite is successfully prepared by in situ reducing Ag catalyst on PDA surface. The Ag-PDA/PDMS catalytic layer possesses an excellent light-to-heat conversion ability and stability under light irradiation. The degradation rate of 4-NP to 4-aminophenol (4-AP) under light irradiation is significantly higher than that of non-irradiation, resulting from both the temperature rise in the catalytic layer, and hot electrons produced by Ag nanoparticles. The temperature rise caused by the photothermal conversion of light-irradiated catalytic layer dominates the performance improvement. The degradation rate of 4-NP reaches 95 % under light irradiation, demonstrating an efficient pathway to design the robust catalyst composites with high-performance photothermal conversion efficiency.
研究领域:
环境科学
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催化化学
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材料科学
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DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
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2020
·
IF 2.463
Meiyu Xu,Guangming Liang,Shuang Wang,Xueli Ma,Guangyuan Liang,Qingling Ni
The semi-rigid polycarboxylic acid, 4′,4′,4′-[(trimethylamino)]-tris[(1,1′-biphenyl)-2-car- boxylic acid] (H 3 TMCA), is first synthesized and used to self-assembly three cadmium coordination polymers , formulated as {[Cd(HTMCA)]•(H 2 O)•(DMA)} n (1), {[Cd(HTMCA)(H 2 O)]·(H 2 O) 5 } n (2), {[Cd(TMCA)] - (CH 3 CH 3 NH 2 ) + •H 2 O} n (3) by the reaction of Cd(NO 3 ) 2 ·4H 2 O under solvothermal conditions. The coordination polymers have been characterized by elemental analysis , IR spectroscopy , thermogravimetric analysis and single-crystal X-ray diffraction. Complex 1 is a 2D framework with a point symbol of {6˄3}. Complex 2 exhibit a 3D topology net with point symbol of {10˄3}. Complex 3 display a (3,6)-connected 3D topology net with point symbol of {4.6 2 } 2 {4 2 .6 10 .8 3 }. The structural comparison of complexes 1–3 shows that the final frameworks can be adjusted by changes in the reaction of temperature and solvents. Moreover, the solid-state photoluminescence properties of 1 – 3 have also been investigated.
研究领域:
化学
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材料科学
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DOI
高影响因子
ANALYST
·
2021
·Vol. 146
·期 24
·7593-7600
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IF 4.616
Ling Lei,Caoling Li,Wensheng Huang,Kangbing Wu
Developing a sensitive and rapid detection method for 4-chlorophenol (4-CP) and 4-nitrophenol (4-NP) is very important due to their high toxicity. In this work, bulk Ti3AlC2 powder was etched to Ti3C2Tx for the first time through a hydrothermal reaction in NaF/HCl solution. After ultrasonication in N-methylpyrrolidone (NMP), Ti3C2Tx powder was successfully exfoliated into multilayered Ti3C2Tx nanosheets (i.e. Ti3C2Tx MXene). The prepared Ti3C2Tx MXene not only has a large electrochemical surface area for the oxidation of 4-CP and 4-NP, but also lowers their electron transfer resistance. As a result, the oxidation signals of 4-CP and 4-NP are significantly improved on the surface of the Ti3C2Tx MXene. Based on the remarkable signal amplification of the Ti3C2Tx MXene, a sensitive and rapid method was developed for the simultaneous detection of 4-CP and 4-NP. The linear range is from 0.1 to 20.0 μM for 4-CP, and from 0.5 to 25.0 μM for 4-NP, with detection limits of 0.062 μM (4-CP) and 0.11 μM (4-NP). This method was used in wastewater samples, and the accuracy was confirmed to be good by high-performance liquid chromatography.
研究领域:
环境科学
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分析化学
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产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2015
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IF 4.504
Xiaojing Lv,Shuanma Yan,Yuyu Dai,Mi Ouyang,Yuan Yang,Pengfei Yu,Cheng Zhang
Ionic liquids 1-butyl-3-methyl-imidazolium tetrafluoroborate ([BMIM]BF 4 ), 1-butyl-3-methylimidazoliumhexafluorophosphate ([BMIM]PF 6 ) and conventional medium tetrabutylammonium perchlorate (TBAP) were utilized as electrolyte for the preparation of poly(4,4′,4′'-tris[4-(2-bithienyl)phenyl]amine) (PTBTPA) films and assembling of EC devices. FTIR spectra and EDX pattern demonstrate an effective doping of the anion into the PTBTPA film at the oxidation state. SEM images investigate the thickness of the polymer films and the morphologies of crimped structure at the oxidation state. The ion diffusion distance (the thickness of polymer film) plays a more critical role for the EC switching speed. According to the electrochemical impedance spectra, the improved ionic conductivity with ionic liquid [BMIM]BF 4 as the electrolyte promote ions more easily dope into the polymer film which leads to the higher optical contrast. In addition, the size of doping anion during the redox process has essential influence on the electrochemical stability.
研究领域:
材料科学
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电化学
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DOI
高影响因子
MICROCHIMICA ACTA
·
2015
·Vol. 182
·期 7
·1247-1254
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IF 3.741
Dai Hong,Gong Lingshan,Lu Shuangyan,Zhang Qingrong,Li Yilin,Zhang Shupei,Xu Guifang,Li Xiuhua,Lin Yanyu,Chen Guonan
We have developed a sensor for 4-aminophenylarsonic acid (4-APhAA) by coating a glassy carbon electrode (GCE) with a composite prepared from an ionic liquid and dahlia-like carbon nanohorns (CNHs). The good electric conductivity, large surface area and high pore volume of the CNHs, and the synergistic action of the ionic liquid (which is a good dispersant with excellent ion conductivity) result in efficient electrocatalysis towards oxidation of 4-APhAA. The effect was investigated by various electrochemical methods, and the electron transfer coefficient, diffusion coefficient, standard heterogeneous rate constant and thermodynamic activation energy were determined. The response range of 4-APhAA was evaluated using an i-t plot. If operated at a working voltage of 900 mV (vs Ag/AgCl), the sensor responds to 4-APhAA over the 0.5 μM to 3.5 M concentration range.
An electrochemical sensor for 4-aminophenylarsonic acid is presented that consists of a glassy carbon electrode modified with carbon nanohorns and ionic liquids.
研究领域:
分析化学
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电化学
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生物医学工程
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纳米材料
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环境监测
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DOI
高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2020
·Vol. 412
·期 23
·5653-5661
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IF 3.637
Xie Wei,Zhang Jian,Zeng Yanbo,Wang Hailong,Yang Yiwen,Zhai Yunyun,Miao Dongwei,Li Lei
A novel molecularly imprinted fluorescent sensor for the determination of 4-nitroaniline (4-NA) was synthesized via free radical polymerization with 3-[(7-methoxy-2-oxo-2 H -chromen-4-yl)methyl]-1-vinyl-1 H -imidazol-3-ium bromide as the fluorescence functional monomer, 4-NA as the template molecule, ethylene glycol dimethacrylate as the cross-linker, and 2,2′-azo(bisisobutyronitrile) as the initiator. The obtained fluorescent poly(ionic liquid) was characterized through Fourier transform infrared, scanning electron microscopy, Brunauer–Emmett–Teller analysis, and fluorescence spectrophotometry. The fluorescent sensor had high fluorescence intensity, short detection time (0.5 min), good selectivity, and excellent sensitivity (limit of detection = 0.8 nM) for 4-NA, with good linear relationships of 2.67–10,000 nM. The practical applicability of the fluorescence sensor in detecting 4-NA in industrial wastewater and spiked environmental water was demonstrated, and a satisfactory result was obtained.
Highly sensitive and selective detection of 4-nitroaniline in water by a novel fluorescent sensor based on molecularly imprinted poly(ionic liquid)
研究领域:
环境科学
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分析化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2024
·Vol. 333
·期 3
·1263-1274
·
IF 1.5
Zhou Xiayu,Gong Mi,Xiong Lihao,Wang Yue,Jiang Wenting,Song Jiayi,Liu Jinquan,Dai Zhongran,Yang Shengyuan,Zhen Deshuai,Li Le
Uranium, regarded as an important element in nuclear fission energy schemes, is harmful to public health owing to its high toxicity and radioactivity. Herein, a novel fluorescent probe (SC4A@Tb 3+ ) was developed using a one-step liquid-phase method with 4-sulfocalix[4]arene (SC4A) and rare earth–metal ions (Tb 3+ ) as precursors to realize the accurate monitoring of uranyl ion (UO 2 2+ ) detection. Based on the dynamic quenching mechanism, the SC4A@Tb 3+ fluorescence quenching sensor for UO 2 2+ detection was in the linear range of 0–0.36 µM, with a detection limit of 20 µg·L −1 , and successfully quantified UO 2 2+ in water and human serum samples. These results suggest that SC4A@Tb 3+ is a potential sensing material for UO 2 2+ detection.
研究领域:
分析化学
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环境科学
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放射化学
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DOI
高影响因子
MICROCHIMICA ACTA
·
2014
·Vol. 182
·期 3
·823-829
·
IF 3.719
Wang Jinshou,Shi Zhen,Jin Jing,Liu Qi,Zhang Shenghui
A three-dimensionally ordered macroporous (3DOM) film of polycysteine (poly-Cys) was used to modify a glassy carbon electrode (GCE) to result in a sensor for 4-aminophenol. The new electrode was used to study the behavior of 4-aminophenol by cyclic voltammetry and differential pulse voltammetry. In comparison to a bare GCE and a GCE modified with poly-Cys without using template, this electrode displays a larger peak current which may be attributed to the structure of poly-Cys and the large surface area of the macroporous structure. The anodic peak current at a working voltage of 195 mV is linearly related to the concentration of 4-aminophenol in two concentration intervals: 0.02 to 20 μM and 20 to 200 μM, respectively. The detection limit is 8 nM (at an S/N ratio of 3). The method was successfully applied to the determination of 4-aminophenol in spiked water samples.
A glassy carbon electrode modified with three-dimensionally ordered macroporous polycysteine film was developed to serve as a sensor for determination of 4-aminophenol. The modified electrode presents lower detection limit, wider linear range and long-term stability for the determination of 4-aminophenol.
研究领域:
分析化学
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电化学传感器
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DOI
高影响因子
JOURNAL OF POROUS MATERIALS
·
2020
·Vol. 27
·期 6
·1639-1648
·
IF 2.183
Zhang Tiantian,Li Bin,Zhang Xiaoli,Wang Jiao,Wei Longhui,Zhao Binxia,Li Binglin
N,N′-dimethyl-N-(4-pyridyl)-1,2-ethanediamine (DMPE) as a special N-alkylation precursor of 4-dimethylaminopyridine (DMAP) was grafted on the surface of γ-chloropropylated functionalized mesoporous silica MCM-41 to prepare immobilized DMAP. Characterization results of small angle X-ray diffraction, thermogravimetry and derivative thermogravimetry, Fourier transform infrared, scanning electron microscopy, energy-dispersive X-ray and transmission electron microscopy indicated that DMAP was successfully covalently bound to the surface of MCM-41. The highest loading of DMAP reached 0.9 mmol/g, which was 2.5 times higher than that of DMAP immobilized on the normal silica gel. The prepared immobilized DMAP as nucleophilic heterogeneous catalysts was successfully used for the acetylation reaction to produce α-tocopherol acetate. The highest yield reached 90.1% under the optimal condition which was summarized as follows: immobilized DMAP 100 mg, substrates mole ratio (acetic anhydride/α-tocopherol) 3:1, reaction temperature 50 ℃, stirring intensity 500 rpm, reaction in toluene for 12 h. The recyclability and stability of the DMAP grafted MCM-41 were excellent, as demonstrated by its use 20 times during batch operation without any loss of productivity.
研究领域:
化学工程
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材料科学
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产品关联
DOI
高影响因子
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