JOURNAL OF HAZARDOUS MATERIALS
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2015
·
IF 4.529
Shaopeng Rong,Yabing Sun
This work describes the application of plasma generated by water falling film dielectric barrier discharge for the degradation of triallyl isocyanurate (TAIC). The results indicated that TAIC solution of 1000 mg/L was effectively removed within 60 min treatment at 120 W output power. Six intermediates were identified and a possible evolution of the TAIC degradation process was continuously proposed basing on the results of mass spectrum analysis. The effects of metal ions and radical scavengers were investigated. Results showed that whatever hydrogen radical scavengers (carbon tetrachloride, perfluorooctane) or hydroxyl radical scavengers ( iso -propyl alcohol, tert -butyl alcohol) all could further enhance the degradation processes, and both kings of radical scavengers could promote the generation of H 2 O 2 . In the present study, we employed a novel method by introducing the mixed additives of Fe 2+ and radical scavengers into the plasma. It was found that the reaction rate constant and energy efficiency were improved by 309.2% and 387.8%, respectively. Among the mixed additives, Fe 2+ could promote the decomposition and increase the oxidizing power of H 2 O 2 , which is generated from the plasma discharge and greatly enhanced by the radical scavengers.
研究领域:
环境科学
·
化学工程
·
等离子体技术
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产品关联
DOI
PubMed
高影响因子
Marine Drugs
·
2022
·Vol. 20
·期 11
·719
·
IF 6.085
Qian Wang,Fu-Jun Liu,Xin-Miao Wang,Guan-Hua Zhao,Dong Cai,Jing-Han Yu,Fa-Wen Yin,Da-Yong Zhou
Low molecular weight (<5 kDa) peptides from mussels (Mytilus edulis) (MPs) and the peptides from clams (Ruditapes philippinarum) (CPs) were prepared through enzymatic hydrolysis by proteases (dispase, pepsin, trypsin, alcalase and papain). Both the MPs and the CPs showed excellent in vitro scavenging ability of free radicals including OH, DPPH and ABTS in the concentration range of 0.625–10.000 mg/mL. By contrast, the MPs hydrolyzed by alcalase (MPs-A) and the CPs hydrolyzed by dispase (CPs-D) had the highest antioxidant activities. Furthermore, MPs-A and CPs-D exhibited protective capabilities against oxidative damage induced by H2O2in HepG2 cells in the concentration range of 25–800 μg/mL. Meanwhile, compared with the corresponding indicators of the negative control (alcohol-fed) mice, lower contents of hepatic MDA and serums ALT and AST, as well as higher activities of hepatic SOD and GSH-PX were observed in experiment mice treated with MPs-A and CPs-D. The present results clearly indicated thatMytilus edulisandRuditapes philippinarumare good sources of hepatoprotective peptides.Keywords:Mytilus edulis;Ruditapes philippinarum;hepatoprotective peptide;H2O2-induced oxidative damage;mice;acute liver injury
研究领域:
生物化学
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药理学
·
分子生物学
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DOI
PubMed
高影响因子
Journal of Cleaner Production
·
2020
·
IF 7.246
Hongping He,Mei Sun,Deli Wu,Guanglan Di,Xunchang Fei
Heterogeneous Fenton dominated by ·OH is limited in its application, as pre-acidification is required to maximize the generation amount and redox potential of ·OH. It is thus featured to consume resources and generate pollutants. In this study, both CuS/H 2 O 2 and Cu 2 S/H 2 O 2 are found to show better performances under close-to-neutral condition (pH 5.0 to 9.0) than acidic condition (pH 3.0) when degrading a model contaminant, sulfamethazine (SMZ), because ·OH does not play a major role in both systems. The Cu valence-dependent catalytic mechanisms are responsible for the varied kinetics between CuS/H 2 O 2 and Cu 2 S/H 2 O 2 . In CuS/H 2 O 2 , Cu(III) and 1 O 2 contribute to the SMZ degradation, and their contributions are pH-dependent. In Cu 2 S/H 2 O 2 , Cu(III) is responsible for the degradation regardless of the pH. Both systems with optimal performances under neutral condition are advantageous as pre-acidification can be avoided. In addition, air sparging induces additional 16% SMZ degradation in Cu 2 S/H 2 O 2 under acidic condition, because the sparged O 2 reacts with dissolved Cu(I). The more O 2 reacts with the dissolved Cu(I), the less generated Cu(III) is ineffectively depleted. Air sparging is readily applicable to different operations, thus its combination with Cu 2 S/H 2 O 2 potentially benefits the development of environmentally-friendly treatment process for industrial wastewater .
研究领域:
环境科学
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化学工程
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DOI
高影响因子
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
·
2019
·Vol. 94
·期 8
·2512-2521
·
IF 2.659
Qi Jiang,Runliang Zhu,Yanping Zhu,Qingze Chen
Background Developing effective removal processes for antibiotics has attracted increasing interest recently. In this work, a novel strategy involving the combination of photocatalysis with Fenton reaction using ferrihydrite/TiO 2 (Fh/TiO 2 ) nanohybrids was developed to efficiently degrade the antibiotic cefotaxime. Fh/TiO 2 nanohybrids were synthesized by simply growing Fh on the surface of commercially available TiO 2 . We expected that Fh of Fh/TiO 2 could capture photo-generated electrons from TiO 2 , inhibiting the recombination of electron–hole pairs; also, by virtue of Fe(III)/Fe(II) cycle on Fh/TiO 2 , photo-generated electrons could be continually transferred to H 2 O 2 to produce ·OH. Accordingly, high degradation efficiency of cefotaxime could be achieved. Results With UV light and H 2 O 2 , Fh/TiO 2 with a Fe/Ti molar radio of 7% showed high catalytic activity indeed, and its degradation rate for cefotaxime was nearly three times higher than that of TiO 2 . The decomposition of H 2 O 2 and production of ·OH in the UV+7%Fh/TiO 2 +H 2 O 2 system were also increased markedly. The large amount of Fe(II) on 7%Fh/TiO 2 determined in this system supported our hypothesis that Fh of 7%Fh/TiO 2 could capture photo-generated electrons from TiO 2 . Although dissolved iron was observed, the contribution of Fenton reaction by dissolved iron was rather limited. After four consecutive cycles, 7%Fh/TiO 2 still retained good stability. Conclusions The UV+7%Fh/TiO 2 +H 2 O 2 system provides a potential alternative in degradation of cefotaxime for further practical application, and it has the following advantages: high catalytic activity, simple preparation method, good stability and low cost, as well as continued catalytic activity after total consumption of H 2 O 2 . © 2019 Society of Chemical Industry
研究领域:
环境科学
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化学工程
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2020
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IF 5.774
Hao Xu,Qian Ye,Qingguo Wang,Peng Zhou,Xiaowei Huo,Yunqi Wang,Xue Huang,Guanyu Zhou,Jing Zhang
Developing a low-cost and environmental friendly way to promote the Fe(III)/Fe(II) cycling is crucial to enhance the efficiency of Fenton reaction. In this study, g-C 3 N 4 was introduced into the Fe(III)/H 2 O 2 system as electron donor to accelerate Fe(III)/Fe(II) cycling and improve the degradation of organic pollutants under visible light. The g-C 3 N 4 /Fe(III)/H 2 O 2 /light system can achieve excellent degradation of different kinds of organic pollutants under low Fe(III) and H 2 O 2 dosages. The central composite design (CCD) and response surface methodology (RSM) were applied to evaluate the effects of g-C 3 N 4 dosage, Fe(III) dosage, H 2 O 2 dosage and light intensity on the DMP degradation efficiency. The mechanisms were investigated by quenching experiments and electron spin resonance (EPR) analyses that the photo-generated electrons and O 2 – were responsible to the Fe(III) reduction through interfacial and aqueous pathways, respectively. OH was the dominant reactive radical in the DMP degradation. Moreover, DMP degradation routes were proposed including the elimination of specific groups, the hydroxylation process and the ring-opening reactions. This study demonstrates an economical and green approach which provides a promising direction for the practical application of g-C 3 N 4 based photocatalysis by integrating it with the Fe(III)/H 2 O 2 Fenton process.
研究领域:
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
NEW JOURNAL OF CHEMISTRY
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2020
·Vol. 44
·期 21
·8952-8959
·
IF 3.288
Hehe Qin,Jinhong Fan,Shun Mao
The Fenton method is an important water treatment process. However, the mechanism of the Fenton reaction is still not widely recognized. In this article, the autocatalysis process responsible for the degradation of 4-chlorophenol (4-CP) as well as the generation of Fe(II) and the decomposition of H2O2 is elaborated using a Fe(III)/H2O2 system. It was found that the one electron reduction of Fe(III) to Fe(II) via oxidization of H2O2 to ˙HO2 is not spontaneous according to the standard electrode potential rather than being limited by the rate constant of 0.0027 M−1 s−1 in view of the Haber–Weiss circulation. However, the reaction of Fe(III) and 4-CP is spontaneous with a second-order kinetic rate constant of >0.12 M−1 s−1 and a conversion rate of 0.56%, which triggers the switch of the Fenton-like reaction as a real rate-determining step. The circulation of Fe(III) to Fe(II) in the proposed Fenton-like reaction mechanism depends on the organic species and various intermediates, which indicates its reaction selectivity, preferable for organics with a stronger thermodynamic and kinetic activity. Besides, a slight pH decline with time-scale and the stoichiometric ratio of ˙OH to H2O2 and H2O2 to 4-CP being 1 and 2, respectively, pointed to the new proposed reaction mechanism. The discovery of the new reaction mechanism might promote the theoretical and technical advancement of the Fenton-like process.
研究领域:
环境科学
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化学工程
✓ 已验证
DOI
高影响因子
FOOD CHEMISTRY
·
2025
·
IF 9.8
Xinyu Han,Jihong Zhou,Yunjie Li,Yuhan Zhao,Yanfei Li,Yingjie Hua,Taowen Dong,Fang Chai
An efficient and readable sensor is desirable for food safety and diagnosis. Herein, a homogeneous mimicking enzyme was constructed by encapsulating polyoxometalate (NH₄)₃[FeMo₆O₁₈(OH)₆]·6H₂O (FeMo 6 ) into the covalent organic framework (FeMo 6 @COF). Coordinating the spatial confinement effect of COF, FeMo 6 exhibited superior peroxide-like activity to catalyze H 2 O 2 to •O− 2, which achieved the “on-off” consecutive sensing of H 2 O 2 and AA via a readable colorimetric mode, with the limit of detection (LOD) at 30 μM and 0.35 μM, respectively. A convenient smartphone assistant platform was established and realized rapid, portable, visual monitoring of AA with LOD of 0.06 μM, and satisfied recoveries with 96.88–104.65 % in human serum and 98.37–107.61 % in commercial beverages. Furthermore, a logic gate circuit was designed to illustrate the potential utilization of combining the intelligent facilities with the experiment. This strategy provides efficient, swift, convenient sensor FeMo 6 @COF with great potential contribution in food safety and diagnosis.
研究领域:
生物传感器
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食品安全
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医学诊断
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产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Wenju Zhu,Wei Peng,Dongxiang Li,Shuolong Wang,Shuang Xu,Kai Ma,Jiarui Liu,Bowen Cheng
The concept of homologous flame retardant of cottonseed meal to cotton fiber is reported. According to the chemical bond characteristics of the amide bond, ester bond, and glycosidic bond in crude protein, crude fiber, and crude fat cottonseed meal, we developed a new system of H 2 O 2 -H 3 PO 4 degradation of dissolved cottonseed meal to prepare flame retardant. The study focuses on preparing water-soluble flame retardant (H 2 O 2 -H 3 PO 4 degradation Cottonseed meal, HPCm) by one-pot degradation of cottonseed meal and achieving durable flame retardancy for cotton fiber. The controllable degradation and dissolution conditions were optimized by orthogonal experiment, achieving a degradation rate of cottonseed meal that reached 88.4 %. The LOI of flame retardant cotton fiber after washing 50 LCS was still maintained at 36.2 %, and the damage length was 55 mm when the concentration of flame retardant HPCm was 60 g/L. The results of X-ray photoelectron spectroscopy, scanning electron microscopy and cone calorimetry showed that HPCm exhibited a synergistic flame retardant mechanism dominated by condensed phase flame retardant and supplemented by gas phase flame retardant. This method successfully produced a durable flame retardant for cotton fiber.
研究领域:
材料科学
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纺织工程
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阻燃化学
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农业化学
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高分子化学
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产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2019
·
IF 3.131
Tong Li,Pei Hu,Jiawei Li,Pintong Huang,Weijun Tong,Changyou Gao
Inspired by natural hemin structure, the fabrication of metal organic framework (MOF) nanomaterials constructed by metal ions and iron porphyrin for peroxidase mimicking has attracted extensive attention recently due to their high concentration of active sites and great channeling for substrate diffusion. Herein, by using benzoic acid as capping agent, we fabricated uniform PCN-224 nanoparticles (NPs), which were composed of Zr 6 cluster and tetrakis(4-carboxyphenyl)porphyrin (H 2 TCPP). Then Fe(Ⅲ) ions were incorporated into the center of H 2 TCPP producing iron porphyrin unit similar to hemin serving as catalytic active site. The procedure of iron incorporation didn't change the size and morphology of PCN-224 NPs. The newly formed Fe@PCN-224 NPs possessed peroxidase-like activity with much lower K m values and higher K cat values than most of peroxidase-like nanozymes as well as natural horseradish peroxidase (HRP), indicating their enhanced catalytic activity. Taking advantage of the excellent peroxidase-like activity of Fe@PCN-224 NPs, we successfully developed a colorimetric method for simple and sensitive detection of hydrogen peroxide and glucose in combination with glucose oxidase .
研究领域:
生物化学
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纳米医学
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DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2019
·
IF 6.97
Xue-Meng Fan,Hou-Yong Yu,Duan-Chao Wang,Zhong-Hao Mao,Juming Yao,Kam Chiu Tam
A simple and eco-friendly Fe2+/H2O2 oxidation of microcrystalline celluloses (MCCs) to prepare cellulose nanocrystals (CNCs) with high carboxylation content is proposed. The effects of reaction times on the morphology, microstructure, and chemical and thermal properties of isolated carboxylated CNCs were investigated. The oxidative decomposition of Fe2+/H2O2 solution of MCC yielded CNCs with a size of 92–140 nm in length and 19–23 nm in width. The CNCs extracted at 6 h possessed the highest carboxyl content (2.2 mmol/g) with a zeta potential of −41 mV and a thermal decomposition temperature of greater than 325 °C. These CNCs are efficient adsorbents for dyes (methylene blue) and metal ions (copper ion) found in wastewater, with removal rates of up to 95.6 and 82.3%, respectively.
研究领域:
材料科学
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环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Biomedical Nanotechnology
·
2018
·Vol. 14
·期 6
·1169-1177
·
IF 5.068
Ma Yuchan,Lu Mingyue,Deng Yan,Bai Ruyan,Zhang Xi,Li Delei,Zhang Kunlei,Hu Rong,Yang Yunhui
In this work, a nano-mimetic enzyme Co3O4 nanoparticles with catalytic effect on the reduction of H2O2, was synthesized and used to label C-reactive protein antibody. Au nanoparticles (Au NPs) were loaded on COF-TpPa-1 to form Au NPs@COF-TpPa-1
with good biocompatibility and adsorption ability. A sandwich C-reactive protein immunosensor was prepared using Au NPs @COF-TpPa-1 as the immobilization matrix. The catalytic current of Co3O4 nanoparticles to the reduction of H2O2 was measured by
the chronoamperometry which is in proportion to the concentration of CRP. The linear range of this immunosensor was 0.05–80 ng/mL with the linear correlation coefficient of 0.9955. The method demonstrated a good sensitivity with a detection limit of 0.017 ng/mL (S/N = 3) for CRP.
When the C-reactive protein immunosensor was applied to real serum samples analysis, the satisfied results were obtained, indicating that the immunosensor is of prospect of application.
研究领域:
生物医学工程
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分析化学
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纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2016
·
IF 7.145
Maoqiang Chi,Guangdi Nie,Yanzhou Jiang,Zezhou Yang,Zhen Zhang,Ce Wang,Xiaofeng Lu
Here, we report a simple one-step procedure to fabricate coaxial Te@poly(3,4-ethylenedioxythiophene) (PEDOT) nanocables via a self-assembly redox polymerization between 3,4-ethylenedioxythiophene monomer and the oxidant of sodium tellurite without the assistance of any templates and surfactants. The as-synthesized Te@PEDOT coaxial nanocables have diameters of center cores in the range of 5–10 nm, and the size of the outer shell from several nanometers to 15 nm. More interestingly, the as-prepared Te@PEDOT nanocables can be converted to Pd@PEDOT nanocables via a galvanic replacement reaction. The center core of the Pd nanowire exhibits a high crystallinity. The application of the synthesized Pd@PEDOT nanocables as peroxidase-like catalysts for the colorimetric detection of H2O2 is reported. The synergistic effect between the Pd nanowire and electrically conducting PEDOT enhances the catalytic activity toward the oxidation of the peroxidase substrate 3,3′,5,5′-tetramethylbenzidine in the presence of H2O2. A detection limit toward H2O2 is as low as 4.83 μM, and a linear range from 10 to 100 μM has been achieved. This work offers a potential versatile route for the fabrication of cable-like nanocomposites with conducting polymers and other active components, which display great promise in applications such as catalysis, nanoelectronic devices, and energy storage and conversion.
研究领域:
材料科学
·
生物催化
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）