ANALYTICAL AND BIOANALYTICAL CHEMISTRY
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2016
·Vol. 408
·期 12
·3239-3246
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IF 3.125
Ma Fangfang,Liang Sheng,Peng Yibo,Kuang Yangfang,Zhang Xing,Chen Shu,Long Yunfei,Zeng Rongjin
Novel fluorescent silver nanoclusters (AgNCs) were synthesized using amido black 10B (AB) as a stabilizing agent and then employed for the detection of copper ions (Cu 2+ ). The AB-stabilized AgNCs (AB–AgNCs) were well dispersed in aqueous solution with an average diameter of around 1.3 nm and exhibited illustrious blue fluorescence emission. Moreover, the fluorescence of AB–AgNCs could be quenched efficiently by Cu 2+ , which might be a result of the coordination between Cu 2+ and the free recognition group of AB on surfaces of AB–AgNCs, inducing the aggregation of AB–AgNCs. Based on the linear decrease of fluorescence intensity, the Cu 2+ concentration was determined in the range of 0.01–1.1 μmol L −1 and the limit of detection (LOD) was 4.0 nΜ. In addition, the detection of Cu 2+ could be performed with AB–AgNCs in the presence of other ions, including 13 kinds of conventional metal ions and 11 kinds of anions. Based on the above experiment, the developed AB–AgNC probe was successfully further applied to detect Cu 2+ in three electroplating effluents, which showed high accuracy.
The process of synthesised silver nanoclusters and the application for Cu 2+ detection.
研究领域:
分析化学
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环境科学
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材料科学
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DOI
高影响因子
Plasmonics
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2017
·Vol. 13
·期 4
·1459-1465
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IF 2.139
Yu Haili,Wang Zeru,Huang Wei
Here, we report a highly stable and sensitive colorimetric assay for Cr 3+ based on amido black 10B-stabilized silver nanoparticles (AgNPs) as the probes. The detection mechanism is that the coordination interaction between Cr 3+ and amido black 10B on the surface of AgNPs causes the cross-linking/aggregation of amido black-stabilized AgNPs, generating a redshift of the absorption peak and a color change from yellow to pink. Under the optimized assay conditions, this colorimetric assay displays a good linear relationship ( R
2 = 0.996) between relative absorbance ratios and the concentration of Cr 3+ in the range of 0.05–20 μM, and the limit of detection (LOD) was estimated to be 0.01 μM by the UV-Vis spectra and 15 μM by the naked eye. Additionally, the colorimetric assay shows a good selectivity over other metal ions, and it is successfully applied to detection of Cr 3+ in tap water, lake water, and river water samples with satisfactory recoveries.
研究领域:
分析化学
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环境科学
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纳米技术
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2016
·
IF 3.138
Pan Hu,Jing Wang,Ruihua Huang
In this study, simultaneous removal of Cr(VI) and Amido Black 10B (AB10B) using quaternized chitosan coated bentonite was investigated by a batch method. The factors affecting adsorption process such as pH, adsorbent dosage, contact time and initial concentration and the interaction of two components in binary solutions have been studied. The results showed that the antagonism effect existed between Cr(VI) and AB10B in binary systems. The equilibrium time for Cr(VI) adsorption was less than the one for AB10B adsorption. The maximum adsorption capacities of the modified bentonite, according to the Langmuir isotherm model were 847.5 mg/g for AB10B and 66.6 mg/g for Cr(VI) at 298 K. The experimental results demonstrated that both Cr(VI) and AB10B were well described by the pseudo-second-order model. Thermodynamic study depicted that the adsorption of Cr(VI) and AB10B onto the modified bentonite was both spontaneous. The adsorption for Cr(VI) was exothermic while the one for AB10B was endoth- ermic in nature.
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
Polymers
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2019
·Vol. 11
·期 3
·502
·
IF 3.164
Wenjuan Guo,Tingcheng Xia,Meishan Pei,Yankai Du,Luyan Wang
The main object of this work is to remove Amido black 10B using a new type of bentonite-based adsorbent with cationic groups by the modification of polyallyl amines between the interlayers of bentonite. Fourier transform infrared, X-ray diffraction, thermogravimetric analysis, and scanning electron microscopy were used to characterize the functionalized bentonite. A series of batch adsorption experiments were performed. The maximum adsorption amount was 144.08 mg g−1when the pH was 2 and the contact time was 120 min. In addition, the equilibrium isotherm data were analyzed using Langmuir and Freundlich isotherm models, while only the Langmuir model could provide a high correlation. Therefore, this study provided a new functionalized bentonite as a low-cost adsorbent for dye removal from water.
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DOI
高影响因子
Journal of Nano Research
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2017
·
IF 0.511
Wan Xin Jia,Dong Tao Lu,Shao Min Shuang,Jun Yang,Chuan Dong
Magnetic chitosan nanoparticles (Fe3O4-CS MNPs) were synthesized by an improved one-pot hydrothermal method and applied for azo dye amido black 10B adsorption. The Fe3O4-CS MNPs were characterized by SEM, TEM, DLS, XRD, FTIR, TGA and VSM. The adsorptive behavior of amido black 10B on Fe3O4-CS MNPs was investigated using the UV-vis specteophotometric technique and the affecting parameters including solution pH, contact time, amido black 10B concentration and Fe3O4-CS MNPs amount were examined. The adsorption process followed the pseudo-second-order kinetic model. The adsorption equilibrium data fitted well with the Freundlich isotherm model with the saturated adsorption capacity of 124.8 mg/g at pH=2.0. The desorption experiment could be carried out using NaOH with the recovery of 91.78%. After five cycles, adsorption efficiency still reached 83.24%. The results showed that Fe3O4-CS MNPs possessed a simple synthesis route and excellent reusability, which have potential application in the adsorption of azo dye in environmental effluents.
研究领域:
材料科学
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环境科学
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化学工程
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产品关联
DOI
高影响因子
BIOCATALYSIS AND BIOTRANSFORMATION
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2024
·
IF 1.4
Luyao Wang,Qiaoyue Chen,Bingchen Zeng,Yuting Shi,YiLinna YiLi,Chengli Yang,Dali Li
Laccase has a wide range of substrates and the oxidation product is water, providing an ideal choice for the biological degradation and decolorization of dyeing wastewater. This study extracted laccase from the fruiting body of Agaricus bisporus, then used o-phthalaldehyde (OPA) as a cross-linking agent and added surface-aminated Fe3O4 nanoparticles (NH2-nanoFe3O4) to prepare magnetic cross-link enzyme aggregates (MCLEAs) of laccase, which was characterized by scanning electron microscope and vibrating sample magnetometer. The optimal temperature for the catalytic reaction of the MCLEAs was 35 °C, and the optimal pH was 3.0. The stability to temperature pH and storage stability were all enhanced. The immobilized laccase was utilized to treat amido black 10B solution, and the decolorization rate reached 92.48%. After five cycles of use, the MCLEAs of laccase could maintain 42.91% of the relative activity and 32.31% of the relative degradation ability to amido black 10B.
研究领域:
环境生物学
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酶工程
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2018
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IF 3.927
Yuqi Cui,Xinyi Zhang,Huixuan Zhang,Qingfeng Cheng,Xiuwen Cheng
The application of semiconductor photocatalysts in wastewater treatment has received increasingly attentions because of its potential utilization of solar energy. In this study, a novel visible-light-driven (VLD) BiOCOOH/g-C 3 N 4 composite photocatalyst was successful synthesized by a facile hydrothermal method. Afterwards, physicochemical properties of the resulting samples were investigated through X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), Brunauer-Emmett-Teller (BET) surface areas, UV–visible diffuse reflectance spectroscopy (UV–vis DRS), transient photocurrent density, Mott-Schottky (M−S) and electrochemical impedance spectroscopy (EIS) measurement. Furthermore, the visible light photocatalytic (PC) performance was evaluated through the degradation of amido black 10B dye. All results indicated that the combination of g-C 3 N 4 and BiOCOOH could exhibited greatly visible light absorbance and photo-generated charge separation efficiency, thereby resulting in the enhanced PC performance of BiOCOOH/g-C 3 N 4 composite photocatalyst. The optimal Bi/C molar rate in BiOCOOH/g-C 3 N 4 composite was determined to be 1/1, and the corresponding photodegradation rate for amido black 10B was 0.01794 min −1 , which was nearly 2.19 and 5.73 folds higher than that of pure g-C3N4 and BiOCOOH. The possible mechanism of the PC reaction was also discussed in detail. Furthermore, BiOCOOH/g-C 3 N 4 composite photocatalyst performed good reusability and stability even after four recycle utilization.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
WATER AIR AND SOIL POLLUTION
·
2020
·Vol. 231
·期 6
·1-16
·
IF 1.9
Xie Chunsheng,Wen Xinyi,Xiao Chun,Wei Shoulian,Wu Xiange,Liu Shasha,Cao Jiangfei
Cu-based copper nanoclusters have generated a great deal of interest based on for their fluorescent and catalytic properties. However, as heterogeneous catalysts, little attention has been given to the degradation of organic pollutants in Fenton-like reaction systems. Here, flower-like copper nanoclusters/flower carbon heterostructured microspheres were prepared by a one-pot mixing template-based method. With Cu-based copper nanoclusters/carbon (CuNCs/C) composite as a Fenton-like catalyst, a CuNCs/C-H 2 O 2 system was used to degrade Amido Black 10B (AB-10B). The effects of different factors on the degradation rate of AB-10B were studied. A 98.6% degradation ratio of AB-10B was reached for the CuNCs/C -H 2 O 2 based Fenton-like reaction within 180 min under optimal experimental conditions. The CuNCs/C concentration was 0.06 g/L, the dosage of H 2 O 2 was 25 mmol/L, the mass ratio of CuNCs and the carbon was 1:2, pH = 6.0, and the reaction temperature was 40.0 °C. The removal rate of AB-10B on CuNCs/C decreased by less than 10% even after 6 catalytic cycles, which showed a remarkable reusability characteristic and high catalytic activity. Cu 0 and Cu + were found to co-exist in the catalysts and presented a high degradation effective for intermediates that were identified by liquid chromatography-mass spectrometry (LC-MS). These results indicated that the catalysts can be used as highly efficient Fenton-like catalyst for the degradation of toxic organic pollutants in wastewater.
Graphical Abstract
研究领域:
环境科学
·
材料科学
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产品关联
DOI
高影响因子
RSC Advances
·
2019
·Vol. 9
·期 70
·40845-40854
·
IF 3.049
Saira Shams,Waqas Ahmad,Amjad Hussain Memon,Yun Wei,Qipeng Yuan,Hao Liang
Herein, we report an effectual method for designing a novel form of nanozyme laccase mimic namely Cu/H3BTC, using copper ions and 1,3,5-benzene tricarboxylic acid (1,3,5-H3BTC). This Cu-based metal–organic framework (MOF) was synthesized through a simple procedure of mixing of two usual reagents at room temperature. Amido Black 10B (AB-10B) was chosen as a model dye for degradation consequences. Results showed that Cu/H3BTC MOF revealed significantly higher catalytic efficacy under certain conditions like high pH, extreme temperature and high salt conditions and it has long-term storage stability, which can lead to a significant decline in catalytic activity of laccase. In addition, the degradation of AB-10B was up to 60% after ten cycles, showing good recyclability of Cu/H3BTC MOF. The UV-visible spectral changes clearly showed that Cu/H3BTC MOF is an effective laccase mimic for the degradation of azo dye AB-10B, which was degraded more easily within the time duration of 60 min. The Cu/H3BTC MOF also possessed fundamental activities like laccase with regard to oxidation of the phenolic compounds. Moreover, a technique for the quantitative detection of epinephrine by Cu/H3BTC MOF was established. These findings help to understand the laccase-like reactivity and provide a basis for the future design and application of metal-based catalysts.
研究领域:
催化
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环境科学
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材料科学
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分析化学
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产品关联
DOI
PubMed
高影响因子
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