CHINESE JOURNAL OF CHEMICAL ENGINEERING
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2021
·
IF 3.171
Lutai Song,Li Liu,Mingyuan Zhu,Bin Dai
The continuous expansion of vinyl chloride production increases environmental pollution caused by mercury catalysts, which is an issue that urgently needs to be solved. Green and stable catalysts should be researched to alleviate this issue. In this research, Thiolactic acid acts as a ligand where sulfhydryl groups form a stable complex with Au on the surface of a spherical activated carbon (SAC). An Au-thiolactic acid/SAC catalyst was designed with a Au theoretical loading of 0.5% (mass) to overcome the disadvantages of traditional Au-based catalysts, such as a low conversion rate and poor life cycle. The ratio of Au to ligand was screened, and the activity was best when Au/S = 1:8. The formation of the Au-S bond was proven by FT-IR and UV–vis. The longevity test of the Au1S8 /SAC catalyst was carried out at 1200 h −1 for 50 h. Samples with reaction times of 0 h, 5 h, 10 h, 20 h, and 50 h were taken to monitor the catalyst status. The XPS and TPR tests proved that the Au-S bond broke as the acetylene hydrochlorination reaction proceeded. The DFT calculation proved that the Au-S bond is the active site, and the sulfur atom promotes the adsorption of C 2 H 2 by the catalyst.
研究领域:
化学工程
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环境科学
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产品关联
DOI
高影响因子
Results in Chemistry
·
2020
·
IF 0
Jiajia Fang,Beina Dong,Yingqiang Fu,Dingxing Tang
Thioglycolic acid-modified CuInS 2 quantum dots were prepared by a hydrothermal method. A method for the determination of sparfloxacin by a CuInS 2 ternary-quantum dot fluorescence probe was established based on the fact that the fluorescence of CuInS 2 quantum dots can be significantly quenched by sparfloxacin. The optimized experimental conditions are as follows: (1) the concentration of CuInS 2 quantum dots is 0.4 mol·L − 1 ; (2) the pH of the buffer solution is 6, and 1 mL of buffer was used; (3) the reaction time is 5 min. The concentration of sparfloxacin is linearly related to the fluorescence quenching intensity from 0.5 μg/mL to 1 mg/mL, and the maximum detection limit is 1 mg/mL.
研究领域:
分析化学
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纳米技术
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药物分析
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产品关联
DOI
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
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2018
·Vol. 34
·期 4
·665-669
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IF 1.248
Lyu Linlin,Jiang Xiaojun,Jia Lian,Ai Tian,Wu Hang
To increase the adsorption capacity of the Corylus heterophylla Fisch(HS) for Pb 2+ , HS was chemically modified using NaOH aqueous solution and 95% ethanol and was labeled as SHS; then SHS was chemically modified using mercaptoacetic acid. The SHS modified with mercaptoacetic acid(MHS) was characterized using FTIR, SEM, and XPS. The results indicated that the —SH group was present on MHS, and after Pb 2+ adsorption, the absorption value of the characteristic peak of the —SH group decreased. The adsorption and desorption properties of this functionalized material were investigated as well as the influences of parameters, such as pH value, type of desorption reagent, dosage, flow rate and maximum sample volume. The Pb 2+ adsorption of MHS reached a maximum with pH>5. The experimental data of Pb 2+ adsorption using MHS were fitted using the Langmuir isothermal adsorption model, and a maximum adsorption capacity of 61.54 mg/g was obtained. This was much higher than the adsorption capacity of SHS before modification with the thiol group. After adsorption, MHS was desorbed using a 0.2 mol/L HCl solution, and the percent of desorption was higher than 99%. MHS was used as a solid-phase extractant in the analysis and determination of Pb 2+ content in food and water samples, and the enrichment times achieved 150-fold.
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
RSC Advances
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2015
·Vol. 5
·期 67
·54133-54137
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IF 3.84
Xu Ren,Yuan Zhao,Bin Yang,Xing Wang,Yen Wei,Lei Tao
By ‘grafting to’ strategy, polymers (poly(ethylene glycol), poly(methyl methacrylate)) have been facilely linked on carbon nanotube (CNT) surface through simultaneous π–π stacking and mercaptoacetic acid locking imine (MALI) reaction to achieve the CNT–polymer complex. The targeted polymers could be effectively anchored on CNT surface under mild condition (room temperature, catalyst free), and the therefore obtained CNT–polymer complex can be well dispersed in regular used organic or aqueous solvents, suggesting this simple method an efficient approach to prepare CNT–polymer nanocomposite.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
JOURNAL OF MOLECULAR RECOGNITION
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2021
·Vol. 34
·期 11
·e2930
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IF 2.137
Haipeng Ye,Ji Shao,Yanpeng Shi,Siwei Tan,Kewen Su,Ling Zhang,Xiaoyue Shan
In this study, magnetic molecularly imprinted polymers (MMIPs) were prepared and used as sorbents for extraction of S-phenylmercapturic acid (S-PMA) from urine samples, followed by high-performance liquid chromatography ultraviolet-visible (HPLC-UV/Vis) analysis. The MMIPs were synthesized by the copolymerization reaction of (phenylthio) acetic acid (template molecule), methacrylic acid (functional monomers) and ethylene glycol dimethacrylate (cross-linkers). The morphology, structure property and surface groups of the prepared MMIPs were characterized by scan electron microscopy, transmission electron microscopy, infrared spectroscopy, X-ray diffraction pattern, thermogravimetric analyses, Brunauer-Emmett-Teller and vibrating sample magnetometer. The selectivity of the MMIPs was investigated in the presence of interferents. Various parameters affecting the S-PMA extraction efficiency were investigated, including MMIPs amount, pH, sample volume, desorption solvent, as well as extraction and desorption time. The obtained optimal parameters were as follows: MMIPs amount (20 mg), pH (3.0), sample volume (5 mL), desorption solvent (methanol/acetic acid [9/1, v/v]), extraction time (30 minutes) and desorption time (2 minutes). The method was validated according to the Food and Drug Administration Guidance for Industry on Bioanalytical Method Validation. The calibration curve for the analyte was linear in the concentration range of 0.030-1.0 mg/L ( r = 0.9995). The LOD and LOQ of the method were 0.0080 and 0.0267 mg/L, respectively. The enrichment factor of the MMIPs was 5. The relative standard deviations of intra- and inter-day tests were in the range of 3.8-5.1% and 3.9-6.3%, respectively. The recoveries at three different concentrations of 0.10, 0.50 and 0.80 mg/L ranged between 95.2% and 98.6%. In addition, the MMIPs could be reused for at least eight times. The proposed method was successfully applied to the determination of S-PMA in urine samples. In addition, this developed method could be used as a tool in the early screening and clinical diagnosis of benzene intoxication.
研究领域:
分析化学
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毒理学
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环境科学
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产品关联
DOI
PubMed
高影响因子
Scientific African
·
2023
·
IF 2.9
Yideneku Feye,Abebe Diro,Getu Sisay,Shimeles Addisu Kitte
This study was aimed to investigate the selective electrochemical determination for dopamine based on thioglyolic acid-modified gold electrode. Negatively charged Au electrode surface was created by making Thioglycolic acid film through thiol functional group. Greater oxidation current and less overpotential was observed for the oxidation of dopamine in phosphate buffer solution of pH 8.0 at thioglyolic acid-modified gold electrode than bare Au electrode due to the electrostatic attraction between the negatively charged thioglyolic acid-modified gold electrode surface and positively charged dopamine. The electrochemical behavior of dopamine at the thioglyolic acid-modified gold electrode showed a linear response from 0.05 to 100.0 µM and the limit of detection is 0.01 µM using chronoamperommetry. The proposed thioglyolic acid-modified gold electrode shows good repeatability and promising application in dopamine hydrochloride injection sample.
研究领域:
分析化学
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电化学
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生物传感器
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产品关联
DOI
高影响因子
ELECTROCHEMISTRY COMMUNICATIONS
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2013
·
IF 4.425
Xunxun Yin,Qiongfang Chen,Honglei Song,Miao Yang,Haiyan Wang
Dual-stabilizer-capped CdTe quantum dots (QDs) were prepared by a one-pot strategy with glutathione (GSH) and thioglycolic acid (TGA) as stabilizers (denoted as GSH-TGA-CdTe). Due to the presence of dual stabilizer, the as-prepared CdTe QDs not only displayed strong anodic electrochemiluminescence (ECL), but also showed sensitive and selective ECL response to nitrite. A linear range from 4.2 to 207 nM and a detection limit of 1.4 nM (S/N = 3) were obtained for the detection of nitrite.
研究领域:
分析化学
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纳米材料科学
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环境监测
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2023
·
IF 5.2
Yue Lei,Yue Zhou,Yuheng Li,Yue Liu,Haiyan Gao,LiangLiang Lin,Hujun Xu
This study aimed to develop a temperature-sensitive perm agent that can reduce the risk of the active ingredient sodium thioglycolate (TGA(Na) in the perm agent to humans. We found that the loading of TGA(Na) in the pure poloxamer formulation reduces its gelation temperature and allows it to gel at room temperature , so we added cationic surfactants to increase its gelation temperature. The temperature-sensitive perm agent was prepared by adjusting the ratio of additives to the desired temperature, and it remained liquid below 32 °C and solidified on contact with the scalp (32 °C). The release behavior of sodium thioglycolate was studied by in vitro release studies and rheology, and the perm performance was investigated. The results showed that its perm efficiency was comparable to that of conventional perm agents, but its sodium thioglycolate transdermal volume was much lower than that of conventional perm agents, with a reduction of nearly 62 %. These results suggest the potential of the temperature-sensitive perm as a healthier alternative for perm design products.
研究领域:
药剂学
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材料科学
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DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2019
·
IF 6.393
Jinyun Peng,Qing Huang,Yuxia Liu,Pingfeng Liu,Cuizhong Zhang
A novel efficient photoelectrochemical (PEC) sensor was assembled for curcumin (Cur) detection using 2-mercaptoacetic acid (TGA)-capped CdTe nanoparticles and nickel tetra-amined phthalocyanine-linked graphene oxide (TGA-CdTe@NiTAPc-Gr). The TGA-CdTe nanoparticles could be firmly immobilized on the thin film structure of NiTAPc-Gr in a hydrogen-bonded manner, thus producing the proposed PEC sensor with a high photoelectrochemical activity of TGA-CdTe nanoparticles and excellent stability of NiTAPc-Gr. The TGA-CdTe@NiTAPc-Gr thin film showed a stronger blue light absorption property than the individual precursors, and this resulted in the sensitive detection of Cur ranging from 0.25–100 μM with a detection limit of 12.50 nM. In addition, the PEC sensor exhibited a high sensitivity and selectivity and quite good reproducibility. Thus, it shows potential for Cur detection in real samples.
研究领域:
分析化学
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生物传感
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纳米材料
·
光电化学
·
食品安全
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DOI
高影响因子
Polymer Chemistry
·
2016
·Vol. 7
·期 27
·4559-4566
·
IF 5.687
Qing Wan,Meiying Liu,Dazhuang Xu,Liucheng Mao,Hongye Huang,Peng Gao,Fengjie Deng,Xiaoyong Zhang,Yen Wei
Fluorescent organic nanoparticles (FNPs) with intensive luminescence are widely applied in various biomedical fields, but the malicious aggregation caused quenching effect of conventional organic dyes hampers their biomedical application. In this work, we report a facile and highly efficient method for fabrication of FNPs with a stable cross-linked structure and enhanced luminescence via a one-pot mercaptoacetic acid locking imine reaction, in which a hydrophobic aggregation induced emission (AIE) dye (AHAn) and hydrophilic polylysine (Plys) were used as two reaction components, while mercaptoacetic acid acted as the lock to conjugate AHAn and Plys. The final amphiphilic fluorescent materials (Plys&AHAn&Plys) are readily formed FNPs in aqueous solution and exhibit high water dispersibility and strong luminescence. Furthermore, Plys&AHAn&Plys FNPs display low toxicity and good biological imaging performance. Altogether, we have developed a rather facile one-pot multicomponent reaction (MCR) to fabricate AIE active FNPs, which shows many promising properties for biomedical applications. More importantly, the MCR strategy could also be used for fabrication of many other multifunctional AIE active polymeric nanoprobes due to its good substrate adaptability and high efficiency.
研究领域:
生物医学工程
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材料科学
·
化学
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2016
·
IF 3.782
Chenxia Hao,Tao Zhou,Shaopu Liu,Linlin Wang,Bowen Huang,Nianxi Kuang,Youqiu He
A dual-channel optical sensing platform which combines the advantages of dual-wavelength overlapping resonance Rayleigh scattering (DWO-RRS) and fluorescence has been designed for the detection of diminazene aceturate (DA). It is based on the use of thioglycolic acid-wrapped CdTe/CdS quantum dots (Q-dots). In the absence of DA, the thioglycolic acid-wrapped CdTe/CdS Q-dots exhibit the high fluorescence spectrum and low RRS spectrum, so are selected to develop an easy-to-get system. In the presence of DA, the thioglycolic acid-wrapped CdTe/CdS Q-dots and DA form a complex through electrostatic interaction, which result in the RRS intensity getting enhanced significantly with new RRS peaks appearing at 317 and 397 nm; the fluorescence is powerfully quenched. Under optimum conditions, the scattering intensities of the two peaks are proportional to the concentration of DA in the range of 0.0061–3.0 μg mL −1 . The detection limits for the two single peaks are 4.1 ng mL −1 and 3.3 ng mL −1 , while that of the DWO-RRS method is 1.8 ng mL −1 , indicating that the DWO-RRS method has high sensitivity. Besides, the fluorescence also exhibits good linear range from 0.0354 to 10.0 μg mL −1 with a detection limit of 10.6 ng mL −1 . In addition, the system has been applied to the detection of DA in milk samples with satisfactory results.
研究领域:
分析化学
·
生物医学工程
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产品关联
DOI
PubMed
高影响因子
Arabian Journal of Chemistry
·
2021
·
IF 5.165
Youyuan Wang,Zhanxi Zhang,Rongliang Zheng,Yanfang Zhang
Nonpolar/polar block copolymer materials can be used to develop high-performance dielectric elastomer materials. At present, there is no method to accurately predict its dielectric constant, which is not conducive to improving related research and development efficiency. For this, styrene–butadienestyrene triblock copolymer (SBS) block copolymer grafted modified by thioglycolic acid (TGA) is chosen as the research object. We propose a hybrid calculation method combining the group contribution method, the connectivity index method, and the dipole moment fluctuation method. The connectivity index method and the dipole moment fluctuation method calculate the dielectric constants of nonpolar and polar repeat units to provide accurate basic data for the group contribution method. In the calculation process, the Vogel model completes the mutual conversion between dielectric constant and molar polarizability. Both theoretical calculation and experimental verification show that the dielectric constant of SBS-TGA increases with the grafting rate. We found the correlation between theoretical calculations and experimental values and confirmed that the applicable frequency range of this method is 1 kHz–1000 kHz. This method can be extended to predict the dielectric constant of other polymers and improve development efficiency.
研究领域:
材料科学
·
高分子科学
·
介电材料
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）