CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Xiaoying Zhang,Peizhe Sun,Kajia Wei,Xia Huang,Xiaoyuan Zhang
Some uses of biochar/H 2 O 2 in the removal of organic pollutants from sewage have made the advanced oxidation of pharmaceuticals and personal care products by modified biochar possible. However, little is known about the performance of modified biochar and the mechanism of this process. Herein, the activation of H 2 O 2 by Fe-impregnated biochar (FBC, produced from maize straw, wheat straw and peanut shell) was studied, and the removal of sulfamethoxazole (SMX) was specifically investigated. The results show that Fe-impregnated biochar had the ability to activate H 2 O 2 and degrade SMX and its performance was better than that of the original biochar. With the increase of pyrolysis temperature from 350 °C to 700 °C, Fe-impregnated maize straw (1 g/L) enhanced the decomposition of H 2 O 2 (3 mM) from 66% to 99% within 2 h. The degradation of SMX (10 μM) by FM700/H 2 O 2 within 2 h reached 100%, which was approximately 3 times of that of the original biochar. The mechanism of activation-degradation was elucidated by electron paramagnetic resonance (EPR). The results show that the interaction of H 2 O 2 with C-OH promoted the generation of HO and that HO and non-radical sites jointly attacked SMX to degrade it. Impregnation with Fe not only increased the specific surface area of the biochar but also provided more active sites to activate H 2 O 2 and degrade SMX.
研究领域:
环境科学
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污染控制
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Ming Cheng,Zongge Li,Tongxin Xu,Yuxin Mao,Ying Zhang,Guoxin Zhang,Zifeng Yan
Synthesis of H 2 O 2 via 2e − O 2 reduction or 2e − H 2 O oxidation has been widely acknowledged as promising alteratives to the energy-intensive anthraquinone processes. Herein, we report that the 2e − O 2 reduction and 2e − H 2 O oxidation reactions, for the first time, can be efficiently promoted on CeO 2 (100) facets, while majority of previous CeO 2 materials are utilized overwhelmingly as catalyst substrates. Electrochemical measurements indicate that CeO 2 nanocubes (NCs) deliver very high H 2 O 2 selectivity of 83% and faradic efficiency of 95.3% for 2e − O 2 reduction. Its H 2 O 2 yield rate at 0.5 V (vs. RHE) reaches 632 mmol g cat −1 h −1 , which exceeds the performance of facet-unspecified CeO 2 nanodots (NDs) in this work and many noble metal- or carbon-based electrocatalysts in previous literatures. Furthermore, it also shows a high efficiency of 66% for 2e − H 2 O oxidation. When assembled into flow cell reactor, the CeO 2 NCs can obtain a total H 2 O 2 yield of 4.6 mol g cat. −1 h −1 , and manage stable faradic efficiency (> 85%) in wide voltage range. Our work may inspire further investigation of rare earth metal oxide-based materials for 2e − oxygen electrocatalysis.
研究领域:
材料科学
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电化学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Lina Wang,Hanpei Yang,Qiangshun Wu,Rui Ma
Photocatalysis-self-Fenton system, integrating photocatalysis with Fenton technology, emerge as promising approaches for environmental remediation. In this study, we introduced K, Na doped g-C 3 N 4 /FeOCl (DCN/FeOCl) catalyst, where amino groups on the DCN surface interacted with unsaturated Fe on FeOCl, forming Fe–N bonds and a Z-scheme heterojunction . The resulting DCN/FeOCl demonstrated efficient H 2 O 2 production and rapid tetracycline (TC) degradation under visible light. The Z-scheme heterojunction and nitrogen vacancy enhanced electron-hole pair separation and O 2 adsorption. Additionally, we proposed a mechanism for dual-channel photocatalytic H 2 O 2 production. This work presents a novel strategy for in-situ H 2 O 2 production and activation, facilitating water decontamination .
研究领域:
环境科学
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材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2018
·
IF 5.667
Na Xiao,Shi Gang Liu,Shi Mo,Yu Zhu Yang,Lei Han,Yan Jun Ju,Nian Bing Li,Hong Qun Luo
In this work, a two-dimensional optical sensing platform for H 2 O 2 , glucose, and uric acid (UA) detection is developed, which integrates the advantages of colorimetric and ratiometric fluorescent techniques. ZnFe 2 O 4 magnetic microspheres with an intrinsic peroxidase-like activity are synthesized to catalyze the oxidation of o-phenylenediamine in the presence of H 2 O 2 , producing a typical yellow substance (oxOPD) with an absorption peak at 420 nm. The oxOPD can significantly quench the fluorescence of boron and nitrogen co-doped CDs (B,N-CDs) at 430 nm through the inner filter effect and generate a new fluorescence emission peak at 556 nm. Thus, the fluorescence intensity ratio ( I 556 / I 430 ) can be utilized for quantitative analysis of the concentrations of H 2 O 2 and H 2 O 2 -involved metabolites (glucose and UA). The colorimetric “naked-eye” readout based on the color change of solution can also be established to determine H 2 O 2, glucose, and UA levels. The detection limit based on colorimetric sensing for H 2 O 2, glucose, and UA are 0.09, 0.9, and 0.9 μM, respectively, and 0.1, 8, and 1 μM using ratiometric fluorescent sensing. Furthermore, this strategy can detect glucose and UA in human serum with satisfactory results, and provide potential applications in the detection of metabolites related to H 2 O 2 release.
研究领域:
分析化学
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生物医学工程
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生物传感
✓ 已验证
DOI
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Yu Liu,Xuanzhi Wang,Xingyu Lu,Di Wang,Wenze Li,Yu Fu,Wei Qi
Addressing the critical scientific challenge of enhancing the catalytic efficiency of transition metal-based metal–organic framework (MOF) materials in the two-electron oxygen reduction reaction (2e– ORR) for the electrochemical synthesis of H2O2 is of paramount importance in a related field. In this context, we had developed an interface synthetic strategy for constructing a series of bimetallic Ni–M (M = Co, Fe, Cu) center MOFs. This approach capitalized on the strong synergy among metallic ions, effectively regulating the electronic structure and thereby improving the catalytic activity of Ni active sites. Notably, the proposed Ni–Co MOF catalyst demonstrated exceptional 2e– ORR activity, achieving a remarkable H2O2 selectivity of up to 96%. This performance significantly surpassed that of Ni–Fe (54%) and Ni–Cu (67%) MOFs, as well as many other reported transition metal catalysts. Detailed studies on the structure–function relationship at the atomic level unveiled that Ni species in a high oxidation state, effectively regulated and stabilized by adjacent Co2+ ions, played a pivotal role in ensuring the superior 2e– ORR activity of the Ni–Co MOF. These physical-chemical insights into the reaction mechanism and structure–function relationships offer valuable guidance for the rational design of highly efficient MOF-based catalysts and reaction systems for on-site electrochemical synthesis of H2O2 via a 2e– ORR process.
研究领域:
材料科学
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电化学
·
催化反应
✓ 已验证
产品关联
DOI
高影响因子
npj Parkinsons Disease
·
2025
·Vol. 11
·期 1
·1-10
·
IF 8.2
Lei Li,Chen Xiuli,Long Xincheng,Tu Qiuxia,Zhao Liping,Huang Dan,Song Lingli,Wang Jiaojiao,Zhai Suzhen,Chen Xiaozhong,Zhang Chunlin
Inspired by natural enzymes, artificial enzymes have garnered significant interest due to their simplicity of production, robustness under harsh conditions, and enhanced stability. This study introduces, for the first time, a novel Z/Ce@hemin composite enzyme, constructed by anchoring hemin onto zeolitic imidazolate framework-8 (ZIF-8)-encapsulated ceria (CeO 2 ) nanoparticles. This innovative design overcomes the challenges of hemin dimerization, enhances substrate affinity, and accelerates mass transport, leading to significantly improved peroxidase-like activity. The enzyme also demonstrates remarkable stability and resistance to environmental interference. Utilizing this Z/Ce@hemin composite, a sensitive and selective colorimetric detection system was developed for rapid and accurate quantification of hydrogen peroxide (H 2 O 2 ), a key oxidative stress marker. This approach was successfully applied in cellular models and Caenorhabditis elegans models of Parkinson’s disease, enabling precise monitoring of H 2 O 2 . The study provides a groundbreaking platform for oxidative stress modeling and expands possibilities in neurodegenerative disease research and therapeutic screening.
研究领域:
生物化学
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医学
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神经科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
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2015
·Vol. 5
·期 23
·17458-17465
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IF 3.84
Qun Wei Shu,Chun Mei Li,Peng Fei Gao,Ming Xuan Gao,Cheng Zhi Huang
CuS materials with peroxidase activity have been prepared but greatly limited by the large dosage and low peroxidase activity. In this paper, porous hollow CuS nanospheres with a variety of sizes were fabricated by one-pot method based on a facile template-assisted hydrothermal approach. The size of the porous hollow CuS nanospheres could be simply tuned by adjusting the molar ratios of reactants, the reaction temperature, and time. The as-prepared porous hollow CuS nanospheres were demonstrated to exhibit more prominent intrinsic peroxidase-like activity using TMB as a peroxidase substrate in the presence of hydrogen peroxide (H2O2). This is a significant comparison to previous reports, demonstrating that the new developed synthetic porous hollow CuS nanospheres can be a new kind of candidate for peroxidase mimics, and the nanospheres are promising for applications in biosensors, environmental monitoring, and so on.
研究领域:
材料科学
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生物医学工程
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2016
·Vol. 183
·期 10
·2823-2830
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IF 4.831
Zhong Yaping,Deng Chun,He Yu,Ge Yili,Song Gongwu
The authors describe a method for increasing the peroxidase-like catalytic properties of copper nanoclusters (Cu-NCs) that are used in non-enzymatic assays. The Cu-NCs were prepared by utilizing 6-thio-β-cyclodextrin as both the template and as effective modulators for increasing the peroxidase-like properties of the Cu-NCs. The β-CD-coated Cu-NCs have an average diameter of 2 nm, are stable in aqueous solutions, display strong fluorescence with excitation/emission peak wavelengths of 360/450 nm, and possess peroxidase-like catalytic activity which makes them a useful enzyme mimic. We have applied the findings to non-enzymatic photometric determination (at 650 nm) of (a) H 2 O 2 in the concentration range of 0.02 to 10 mM using the β-CD/Cu-NC assisted oxidation of tetramethylbenzidine by H 2 O 2 , and (b) glucose in the concentration range of 0.04 to 20 mM after addition of glucose oxidase and formation of H 2 O 2 . The detection limits (at an S/N ratio of 3) are 0.2 μM for H 2 O 2 and 0.4 μM for glucose. The β-CD coating is found to result in a strong increase in the reaction rate, probably because the cavity of β-CD acts as a pocket for the recognition and catalysis of substrate. Hence, the binding specificity becomes similar to that of natural enzymes.
The peroxidase-like catalytic activity of Cu-NCs in non-enzymatic sensors is strongly enhanced by utilizing mono-6-thio-β-cyclodextrin (mono-6-SH-β-CD) as both the template molecule and the effective rate modulator.
研究领域:
生物化学
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纳米医学
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2016
·
IF 5.886
Huai-Rong Zhang,Yin-Zhu Wang,Wei Zhao,Jing-Juan Xu,Hong-Yuan Chen
In this work, we developed a visual electrochemiluminescence (ECL) sensing platform based on a dual-bipolar electrode (D-BPE) array chip. The chip was composed of two arrays of BPEs and three separated arrays of reservoirs filled with buffer, Ru(bpy)32+-TPrA and luminol solutions, respectively. Both BPEs served as ECL reporting platforms. By applying 6.0 V voltage, an array of orange electrochemiluminescence (ECL) signals belonging to Ru(bpy)32+ turned on. After adding DNAzyme and H2O2 in Ru(bpy)32+ and luminol reservoirs, the orange Ru(bpy)32+ signals decreased until vanished due to the quenching effect; meanwhile, a new array of blue ECL signals turned on because of the luminol-H2O2 ECL reaction. The designed D-BPE owns superior properties compared with the three-electrode system benefiting from the quantitative relation of bipolar systems, which greatly enhanced the ECL detection sensitivity. Meanwhile, the visual color-switch ECL and the ratiometric detecting principle made the results easier to evaluate and more accurate. Quantitative detection of HL-60 cancer cells from 320 cells/mL to 2.5 × 105 cells/mL with two linear ranges was achieved. The detection limit was down to 80 cells/mL. Finally, this D-BPE chip could distinguish the tumor cells from normal cells and provide a prospect for cancer diagnosis in a high-throughput, visual way.
研究领域:
生物传感
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医学诊断
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分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Polymer Chemistry
·
2020
·Vol. 11
·期 10
·1797-1805
·
IF 5.342
Yang Wang,Lin Shi,Yajin Jin,Si Sun,Pengcheng Gao,Yingying Wei,Zhifei Wang,Yong Jiang
In organic–inorganic hybrid materials, it is difficult to obtain magnetic polymer microspheres with the good encapsulation of magnetic materials because there are few successful interactions between monomers and magnetic materials. In this study, a method involving surface-initiated polymerization was developed for the preparation of magnetic polymer composites; the method used Fe3O4 nanoparticles and H2O2 as a redox initiator. After activation with carboxylic acid, the amount of Fe2+/Fe3+ on the surfaces of the Fe3O4 nanoparticles increases, which can effectively catalyze the decomposition of H2O2 to produce hydroxyl radicals. The hydroxyl radicals were used to initiate the polymerization of the monomers on the surfaces of the Fe3O4 nanoparticles so that the Fe3O4 nanoparticles became encapsulated in polymer microspheres and in this way highly magnetic responsive polymer microspheres were obtained. This method was found to be applicable to the polymerization of many types of monomers, and some polymer microspheres (PS, PMMA, PBA and PVAc) were synthesized successfully. The effects of reaction time, concentration of the added Fe3O4, volume of the added styrene monomer, and volume of the added H2O2 on the prepared Fe3O4@PS composites were investigated. The results indicated that the polymer microsphere size was controllable (60 nm–2 μm) and the load of Fe3O4 nanoparticles in the polymer microspheres could be adjusted by the addition of Fe3O4 nanoparticles. This method was beneficial for preparing various magnetic polymer composites having significant potential application value in many fields.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Analytical Methods
·
2024
·Vol. 16
·期 22
·3530-3538
·
IF 2.7
Aham Emmanuel Chigozie,A. Ravikumar,Xiaofeng Yang,G. Tamilselvan,Yibin Deng,A. Arunjegan,Xuesong Li,Zhang Hu,Zhen Zhang
Biomolecules play vital roles in many biological processes and diseases, making their identification crucial. Herein, we present a colorimetric sensing method for detecting biomolecules like cysteine (Cys), homocysteine (Hcy), and glutathione (GSH). This approach is based on a reaction system whereby colorless 3,3′,5,5′-tetramethylbenzidine (TMB) undergoes catalytic oxidation to form blue-colored oxidized TMB (ox-TMB) in the presence of hydrogen peroxide (H2O2), utilizing the peroxidase and catalase-mimicking activities of metal–phenolic coordination frameworks (MPNs) of Cu–TA, Co–TA, and Fe–TA nanospheres. The Fe–TA nanospheres demonstrated superior activity, more active sites and enhanced electron transport. Under optimal conditions, the Fe–TA nanospheres were used for the detection of biomolecules. When present, biomolecules inhibit the reaction between TMB and H2O2, causing various colorimetric responses at low detection limits of 0.382, 0.776 and 0.750 μM for Cys, Hcy and GSH. Furthermore, it was successfully applied to real water samples with good recovery results. The developed sensor not only offers a rapid, portable, and user-friendly technique for multi-target analysis of biomolecules at low concentrations but also expands the potential uses of MPNs for other targets in the environmental field.
研究领域:
生物化学
·
分析化学
·
纳米生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2020
·
IF 7.632
Na Song,Ce Wang,Xiaofeng Lu
Recently, hybrid biocatalysts with a unique interfacial structure have attracted significant attention for enzyme mimicking due to their superior catalytic activity compared with the single component catalyst. In this work, novel sheet-on-tube heterostructured polypyrrole (PPy)@CoO/NiO nanotubes (NTs) are synthesized via an in situ growth strategy and are utilized for enzyme mimicking and sensing applications. The as-prepared PPy@CoO/NiO NTs can catalyze H2O2 into ·OH and realize the 3,3′,5,5′-tetramethylbenzidine (TMB) oxidation, showing an excellent peroxidase-like property. Thanks to the synergistic effect between PPy NTs and CoO/NiO nanosheets, the catalytic performance of the resultant PPy@CoO/NiO NTs is superior to individual PPy NTs and bare CoO/NiO sheets as well as their physical mixture. In addition, the PPy@CoO/NiO NTs can also catalyze the H2O2 decomposing to generate O2, possessing a catalase-like property. Then, we perform a simple visual method for sensitively detecting H2O2 and ascorbic acid (AA). This work demonstrates a distinctive route to promote the catalytic performance of enzyme-like nanomaterials for huge potentials in biotechnology and environment fields.
研究领域:
材料科学
·
生物技术
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）