SCIENCE OF THE TOTAL ENVIRONMENT
·
2022
·
IF 10.753
Zedi He,Qiongfang Wang,Pinhua Rao,Lei Dong,Min Zhang,Xin Zhang,Naiyun Gao,Jing Deng
The use of antibiotics has become an indispensable part of the production and life of human society. Among them, sulfonamide antibiotics widely used in humans and animals are considered to be one of the most crucial antibiotics. However, antibiotics are difficult to degrade naturally, leading to an accumulation in the environment and a potential hazard to human health. In this paper, WS 2 as a co-catalyst could reduce trace Fe(III) to Fe(II) which exhibited a great activating ability to PS through the exposed W(IV) active sites, and formed the Fe(III)/Fe(II) cycle to degrade sulfachloropyridazine (SCP) continuously. This paper systematically discussed the degradation of SCP under different conditions in the PS/WS 2 /Fe(III) system, including the amount of WS 2 , Fe(III) concentration, PS concentration, initial pH, natural organic matter (NOM) and common anions ( NO 3 − , Cl − , HCO 3 − , HPO 4 2− and H 2 PO 4 − ). The experimental results showed that PS/WS 2 /Fe(III) system possessed a strong degradation ability for SCP in a wide pH range. NO 3 − and Cl − could promote the degradation of SCP a little. HCO 3 − , HPO 4 2− and H 2 PO 4 − could significantly inhibit the degradation of SCP. The main types of free radicals that degraded SCP were explored. In addition, the stability and reusability of WS 2 were examined, and two possible degradation pathways of SCP were proposed.
研究领域:
环境科学
·
化学
✓ 已验证
DOI
高影响因子
ANALYST
·
2010
·Vol. 136
·期 1
·205-210
·
IF 3.272
Mei-Jin Li,Pengchong Jiao,Min Lin,Weiwen He,Guo-Nan Chen,Xi Chen
A new water-soluble iridium(III) diimine complex with appended sugar was synthesized and characterized. The electrochemiluminescent behavior of the new complex in aqueous buffer was first studied and the ECL signal was found to be much higher than that of [Ru(bpy)3]2+ at a Pt working electrode. Tri-n-propylamine (TPA) and antibiotics were determined by the ECL of the iridium(III) complex in aqueous buffer at the Pt electrode and the method was found to show good sensitivity and reproducibility. The new iridium(III) complex was found to display good solubility in aqueous solution and a strong ECL signal at the Pt electrode, which might open up the possibility of its application in analysis.
研究领域:
分析化学
·
电化学
·
材料科学
✓ 已验证
DOI
高影响因子
TEXTILE RESEARCH JOURNAL
·
2024
·
IF 1.6
Yuewen Zhang,Yanli Ma,Hailiang Wu,Yanqin Shen,Yanxiao Ma,Yijun Yao,Ying Xue,Desuo Zhang
Fabrics with directional water transport performance have attracted considerable attention in daily life. They are in high demand, owing to their ability to transport sweat away from the skin to improve personal comfort. However, the fabrication of such materials has still remained a critical task. This article reports a nonwoven with the directional water transport function, achieved using a synergistic combination of a microstructure and a wettability gradient. The three-step fabrication strategy involves needling bonding of Y cross-section polyamide fiber webs with two needling densities (30 and 190 needle/cm2), followed by single-sided spraying of polydopamine–silicon carbide powder–polyethyleneimine dispersion and a fluoride-free hydrophobic agent. Using fiber webs with different needling densities endows the nonwoven fabric with a differential capillary effect, enhancing the directional water transport property. The unique microstructure achieves the directional water transport property by improving permeability at lower needling densities and hindering transport through a denser needling density in the reverse direction. At the same time, the wetting gradient effect promotes water transfer from the hydrophobic surface to the hydrophilic surface. The successful preparation of these interesting directional water transport materials offers new insights into the role of fibrous materials, the needling density of nonwovens, and the development of highly comfortable moisture-wicking textiles.
研究领域:
材料科学
·
纺织工程
✓ 已验证
DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 96
·78833-78840
·
IF 3.84
Lin Luo,Jin-Yi Yang,Zhi-Li Xiao,Dao-Ping Zeng,Yong-Jun Li,Yu-Dong Shen,Yuan-Ming Sun,Hong-Tao Lei,Hong Wang,Zhen-Lin Xu
Histamine (HA) is an essential test item for fishery samples. However, the fast and effective determination of HA is difficult due to its simple structure and small molecular size. In this study, a sensitive and specific monoclonal antibody against p-nitrobenzoylated histamine (NPHA), which can be easily obtained from the reaction of HA and p-nitrobenzoic acid N-hydroxysuccinimide ester (PNBA-OSu) under mild conditions, was generated for the first time. Based on this mAb, an immunochromato-graphic assay strip (ICA strip) using a colloidal gold nano particles-antibody (GNPs) probe for rapid detection of HA in saury samples was established. After screening the coating antigens and optimization of analytical parameters, a heterologous coating based ICA strip exhibited the most excellent detection ability with a visual detection limit (VDL) of 6.0 mg kg−1 in qualitative experiments and a detection limit (by a strip reader) of 1.0 mg kg−1 in semi-quantitative experiments for saury samples, with no cross-reactivity with HA analogs. Good correlation between the ICA strip with liquid chromatography-tandem mass spectrometry was achieved for spiked and naturally contaminated saury samples. Overall, this method is suitable for screening of HA residue for large scale fish samples in a quick, simple and low-cost manner.
研究领域:
分析化学
·
食品安全
·
免疫学
·
分子诊断
·
兽药残留检测
✓ 已验证
DOI
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2011
·Vol. 14
·期 2
·464-468
·
IF 3.454
Chaoyong Wu,Jinyao Wang,Pingjing Chang,Haiyang Cheng,Yancun Yu,Zhijian Wu,Dewen Dong,Fengyu Zhao
Polyureas were synthesized from diamines and carbon dioxide in the absence of any catalyst or solvent, analogous to the synthesis of urea from condensation of ammonia with carbon dioxide. The method used carbon dioxide as a carbonyl source to substitute highly toxic isocyanates for the synthesis of polyureas. FTIR and DFT calculations confirmed that strong bidentate hydrogen bonds were formed between urea motifs, and XRD patterns showed that the PUas were highly crystalline and formed a network structure through hydrogen bonds, which served as physical cross-links. The long chain PUas presented a microphase separated morphology as characterized by SAXS and showed a high melting temperature above 200 °C. The PUas showed high resistance to solvents and excellent thermal stability, which benefitted from their special network structures. The PUas synthesized by this method are a new kind of functional material and could serve some areas where their analogues with similar functional groups could not be applied.
研究领域:
高分子化学
·
材料科学
·
绿色化学
·
物理化学
·
功能材料
✓ 已验证
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Hao Zheng,Minghui Wang,Jianfang Chen,Maokun Liu,Ying Ye,Zupeng Yan
A novel glucose biosensor was prepared by in situ electropolymerization of aniline in GRA synthesized by using electrochemical expansion of graphite in propylene carbonate electrolyte onto platinum (Pt) electrode, followed by electrodeposition of platinum nanoparticles (PtNPs) on Pt/PANI-GRA electrode. Glucose oxidase (GOD) was immobilized on this modified Pt electrode through chitosan. The fabricated process and the electrochemical behaviors of resulting biosensor were investigated by scanning electron microscopy (SEM) and cyclic voltammetry (CV). The developed glucose biosensor exhibited superior sensitivity of 52.67 μA mM -1 cm -2 and selectivity, which showed no response to the interference from glycine (Gly), Urea (Urea), L-phenylalanine (L-Phe), ascorbic acid (AA), tyrosine (L-Tyr) and D-galactose (D-Gal). The biosensor also showed a fast response time within 3 s. The biosensor was used for the detection of glucose in human blood samples with satisfactory results compared with standard hospital laboratory analysis.
研究领域:
生物传感器
·
纳米材料
·
电化学分析
·
临床检验
·
生物医学工程
✓ 已验证
DOI
高影响因子
HIGH PERFORMANCE POLYMERS
·
2025
·
IF 1.6
Bo Mu,Wei Li,Yunpeng Li,Wenyi Zhang,Bangrui Kou,Baoping Yang,Junhong Guo,Li Chen,Li Tian
In this manuscript, polyimide (PI) films with high strength and toughness are achieved by adjusting the stiffness and flexibility of the PI macromolecules utilizing rigid mixed diamine monomers, namely benzimidazole (PABZ) /benzoxazole (BOA) and flexible bisphenol A dianhydride (BPADA) monomer. Meanwhile, the stiffness of the PI is modulated as well by the coordination crosslinking between benzimidazole motifs of PABZ and Cu2+ validated by FTIR, XPS and UV-vis spectra, respectively which could boost the arrangement and packing of the PI molecules confirmed by the packing coefficient. The comprehensive properties of the polyimide film are synergistically increased by combining the rigidity/flexibility of the macromolecules and the reversible coordination effect, with a strength and toughness of the PI film reaching 132.43 ± 1.73 MPa and 21.24 ± 2.13 MJ/m3 respectively, as well as the decomposition temperature 5% weight loss (Td5%) and glass transition temperature (Tg) attaining at 514°C and 251°C. More interestingly, the PI films exhibit excellent wear resistance with the volume wear rate reduced from 15.578 × 10-6 mm3/Nm to 2.936 × 10-6 mm3/Nm which accounts for a reduction of 81.2% compared to neat PI. Therefore, high-strength/toughness, improved thermal stability and excellent wear-resistant PI films can be fabricated utilizing a synergistic strategy of stiffness-flexibility harmonization which is expected to provide a novel design strategy for the high-performance PI application.
研究领域:
材料科学
·
高分子化学
·
纳米技术
·
表面工程
✓ 已验证
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2021
·
IF 4.821
Zhihao Wu,Ruchun Chen,Shuang Pan,Hui Liu,Xiaoli Hu
Herein, a convenient method is developed for ratiometric fluorescence detection of ATP (adenosine triphosphate) based on CDs-OPD (carbon dots- o-phenylenediamine). In the absence of ATP, oxOPD, the colored oxidation product of OPD fabricated by a redox reaction occurred between OPD and Cu 2+ , not only quenches the fluorescence of CDs, but also emits a yellow fluorescence which acts as another signal element. However, ATP will compete with OPD to chelate Cu 2+ inhibiting the redox reaction, which hampers the formation of oxOPD resulting in the diminution of IFE (inner filter effect) between CDs and oxOPD, then the fluorescence of CDs restores. ATP-induced dual-signal response of the CDs-OPD/Cu 2+ system makes ratiometric assay possible. The method exhibits high sensitivity toward ATP with a detection limit of 0.43 μmol L −1 . Furthermore, the semi-quantitative measurement of ATP is available by naked eyes through the color of fluorescence and solution. Finally, the developed method is employed for the quantification of ATP in practical samples with satisfactory results.
研究领域:
分析化学
·
生物传感
·
纳米材料
·
分子生物学
·
临床检验
✓ 已验证
DOI
高影响因子
DYES AND PIGMENTS
·
2023
·
IF 4.5
Yutong Xiong,Weiren Zhong,Xuedan Zhang,Yuting Lin,Zhenguo Tang,Shouji Li,Xu-Min Cai
The petrochemical-based multi-stimuli responsive materials have been widely explored as advanced functional materials in the past several decades, but they inevitably face problems like complicated synthesis, non-renewability, and non-sustainability. On this basis, the bio-based materials used to construct multi-stimuli responsive due to the unique natural structures have come to the fore. In this work, three novel triphenylamine-based salicylideneanilines have been simply designed with aggregation-induced emission (AIE) properties. Among all, DAMB-TPAOH and DAMB-TPA possessing the natural structure of dehydroabietic acid from rosin are bioproduct-inspired AIE luminogens (BioAIEgens). Derived from the excited-state intramolecular proton transfer (ESIPT) and restriction of intramolecular motion (RIM) dual-mechanism caused by the hydroxyl group and rigidification of alicyclic moiety, respectively, the solid-state DAMB-TPAOH exhibits red-shifted (compared to DAMB-TPA ) and stronger (compared to BA-TPAOH ) emission, endowing this BioAIEgen with the best fluorescence behavior. Further, the introduction of the natural skeleton, propeller TPA, and imine group results in the high-contrast mechanochromic and acidichromic properties of DAMB-TPAOH . The multi-stimuli responsive properties endow DAMB-TPAOH with potential utilization in the manufacture of rewritable paper and multi-color ink. The current work contributes greatly to the development of BioAIEgens with both mechanochromism and acidichromism.
研究领域:
材料科学
·
有机化学
✓ 已验证
DOI
高影响因子
CHINESE JOURNAL OF CHEMISTRY
·
2020
·Vol. 38
·期 10
·1057-1064
·
IF 3.826
Chongyang Du,Yaofeng Chen
Summary of main observation and conclusion Transformation of CO 2 into valuable organic compounds catalysed by cheap and biocompatible metal catalysts is one of important topics of current organic synthesis and catalysis. Herein, we report the zinc powder catalysed formylation and urealation of amines with CO 2 and (EtO) 3 SiH under solvent free condition. Using 2 mol% zinc powder as the catalyst, a series of secondary amines, both the aromatic ones and the aliphatic ones, can be formylated into formamides. When primary aromatic amines were used as the substrates, the reactions produce urea derivatives. The electronic and steric effects from the substrates on the formylation and urealation reactions were observed and discussed. The recovery and reusability of zinc powder were investigated, showing the zinc powder can be reused in the formylation reaction without loss of catalytic activity. The analysis on the reactants/products mixture after filtering out the zinc powder showed the zinc concentration in the mixture is low to 1 ppm. The pathways for the formylation and urealation of amines with this catalytic system were also investigated, and related to the different substrates.
研究领域:
有机化学
·
催化化学
✓ 已验证
DOI
高影响因子
POLYMER
·
2018
·
IF 3.483
Guodong Zhou,Weitao Wang,Mao Peng
Molecular composites using rigid-rod macromolecules as the reinforcement have attracted tremendous research interest. However, dispersion of rigid-rod macromolecules at molecular level in the matrix remains a great challenge. Herein, we report new epoxy (EP)-based molecular composites with sulfonated aromatic polyamides , poly( p -sulfophenylene terephthalamide) (sPPTA) and poly(benzidine-2,2′-disulfonic acid terephthamide) (PBDT), as the reinforcement, which disperse uniformly in epoxy. Covalent bonds formed by the reaction between the sulfonic acid groups of the polyamides and epoxy prevent reaction-induced phase separation during high temperature curing. The novel molecular composites exhibit extraordinarily high strength and toughness, with maximum tensile strength of sPPTA/EP and PBDT/EP (100.2 ± 4.8 MPa and 121.9 ± 12.5 MPa, respectively) increased by ∼81% and ∼120%, respectively. To the best of our knowledge, the improvement of mechanical properties surpasses those of molecular composites, nanofiller reinforced thermosets and liquid crystalline thermosets ever reported.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2018
·
IF 0
Lu Shen,Yong Li,Wenjie Zhao,Lijing Miao,Weiping Xie,Huanming Lu,Kui Wang
In order to hold the excellent corrosion resistance of zinc-rich epoxy coatings with reduced zinc content, five types of graphene modified zinc-rich epoxy coatings (G-ZRCs) were prepared. The effect of zinc content on the corrosion protection behaviors of G-ZRCs was investigated using electrochemical impedance spectroscopy (EIS). Open circuit potential (OCP) was also utilized to deepen the understanding of the anticorrosion mechanism of the as-prepared composite coatings. The results confirmed that addition of 0.3 wt % graphene could make the coating with 40 wt % (G-40ZRC) and 55 wt % zinc (G-55ZRC) provide cathodic protection for a short period of time. The EIS and OCP results showed a dominant physical barrier protection mechanism for the coatings without zinc (G-ZRC), while there was a mixed mechanism for G-40ZRC and G-55ZRC and a dominant cathodic protection mechanism for the coatings with 70 and 85 wt % zinc (G-70ZRC and G-85ZRC). Furthermore, the graphene modified zinc-rich coatings and corresponding corrosion products immersed in a 3.5% NaCl solution for 100 days were also characterized, which could further reveal anticorrosion mechanisms of the graphene modified zinc-rich coatings and the passivation effect of polyaniline (PANI).
研究领域:
材料科学
·
腐蚀与防护
✓ 已验证
产品关联
DOI
危险品化学品经营许可证（带存储）