Sustainability
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2021
·Vol. 13
·期 5
·2641
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IF 3.251
Siyao Bian,Shuang Xu,Zhibing Yin,Sen Liu,Jihui Li,Shuying Xu,Yucang Zhang
In this study, sequential KMnO4-promoted oxidative pyrolysis and H2O2oxidation were employed to upgrade the adsorption capacities of durian shell biochar for methylene blue (MB) and tetracycline (TC) in an aqueous solution. It was found that the KMnO4/H2O2co-modification was greatly influenced by pyrolysis temperature and the optimal temperature was 300 °C. Moreover, a low concentration of H2O2enabled the improvement of the adsorption capabilities greatly with the catalysis of pre-impregnated manganese oxides, addressing the shortcoming of single H2O2modification. The co-modified biochar exhibited high adsorption capabilities for MB and TC, remarkably surpassed KMnO4- and H2O2- modified biochars as well as pristine biochar. The increase of adsorption capabilities could be mainly contributed to the incorporation of MnOxand carboxyl by KMnO4-promoted oxidative decomposition and Mn-catalyzed H2O2oxidation. This would provide a novel and efficient method for preparing highly adsorptive biochar using sequential KMnO4-promoted oxidative pyrolysis and H2O2oxidation.Keywords:biochar;KMnO4/H2O2co-modification;methylene blue;tetracycline
研究领域:
环境科学
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材料科学
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高影响因子
CHEMOSPHERE
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2019
·
IF 5.108
Rongji Cui,Suxia Ma,Jie Wang,Shujun Sun
The catalytic gas-phase H 2 O 2 oxidation of NO was achieved over Fe-based catalysts supported on montmorillonite K10, γ-alumina and ZSM-5. ESR tests illustrate that the three catalysts can catalyze decomposition of H 2 O 2 yielding highly reactive hydroxyl radicals , of which Fe/K10 has the fastest rate, followed by Fe/γ-alumina. Fe 3+ in Fe/K10 and Fe/γ-alumina show lower density of electron cloud due to a strong interaction between Fe 3+ and the support, which benefits the electron transfer from the H 2 O 2 to Fe 3+ , thus favoring the production of hydroxyl radicals. Fe species exist on the surface of Fe/K10 mainly in the form of Fe 2 O 3 , whereas Fe species of Fe/γ-alumina and Fe/ZSM-5 exist mainly in the form of Fe 3 O 4 , and it is found that Fe 2 O 3 is more active than Fe 3 O 4 in catalytic gas-phase H 2 O 2 oxidation of NO. Interestingly, Fe/ZSM-5 has the lowest efficiency in generating hydroxyl radicals, its NO removal efficiency is 90%, which is much higher than 47.5% for Fe/γ-alumina and 62.3% for Fe/K10. In-situ IR results suggested that Fe/ZSM-5 are dual functional in oxidation of NO, that is, whether both Fe ion sites and Brønsted acid sites collectively provide the catalytic functionality. In the meantime, a possible reaction mechanism on catalytic gas-phase H 2 O 2 oxidation of NO over Brønsted acid sites is proposed.
研究领域:
环境科学
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催化化学
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PubMed
高影响因子
CHEMOSPHERE
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2019
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IF 5.108
Hua Wei,Yunong Tang,Tamer Shoeib,Aimin Li,Hu Yang
The preoxidation effects of H 2 O 2 , NaClO, and KMnO 4 on the dewaterability of sewage sludge were compared by analyzing the changes in specific resistance to filtration (SRF), filter cake moisture content (FCMC), extracellular polymeric substance (EPS) fractions and components, and floc properties. The three oxidants varied in oxidation efficiency and exhibited distinctive mechanisms. NaClO not only destroyed sludge flocs and EPSs but also effectively caused cell lysis, resulting in release of a considerable amount of organic matters and subsequently significant deterioration of dewatering performance. The oxidation of H 2 O 2 and KMnO 4 was relatively mild and occurred mainly on the outer layers of the sludge flocs and cell-bound EPSs. By contrast, the SRF and FCMC of the sludge conditioned with a low dose of KMnO 4 were slightly improved, and a fraction of soluble EPS was compressed because of the coagulation effect of the oxidation product MnO 2 . The pH of the sludge conditioned with H 2 O 2 and KMnO 4 showed no considerable change. Meanwhile, NaClO evidently increased the alkalinity of the sludge because of the hydrolysis effect. After the pH of the NaClO-treated sludge was readjusted to 7.0, the partial protonation efficiency slightly alleviated the deterioration of sludge dewatering performance. The preoxidized sludge was then subjected to reflocculation treatment using FeCl 3 , polyacrylamide, and a cationic starch-based flocculant , respectively. The combined treatment of preoxidation and reflocculation showed a high dewatering efficiency owing to their synergistic effect.
研究领域:
环境工程
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水处理
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化学工程
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PubMed
高影响因子
CELLULOSE
·
2019
·Vol. 26
·期 5
·3437-3453
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IF 3.917
Zhang Shengli,Chen Haoyu,Zhang Silue,Kai Chengcheng,Jiang Man,Wang Qun,Zhou Zuowan
Abstract A novel biosorbent PEI-HOCM was successfully prepared by grafting polyethyleneimine (PEI) onto H 2 O 2 -oxidized cellulose membrane (HOCM). The whole systhesis process occurred in aqueous solution and was environmentally friendly without any toxic cross-linkers involved. ATR-FTIR, XPS and titration analysis confirmed that the hydroxyl groups of cellulose were oxidized to carbonyl groups by H 2 O 2 and PEI was successfully introduced to the HOCM. The PEI-HOCM had positively charged surface (+ 20.6 to + 86.6 mV) at the measured pH range 3–9 according to the zeta potential analysis. The adsorption of Cr(VI) on the PEI-HOCM obeyed the pseudo-second-order kinetic model and Langmuir isotherm model. Its maximum equilibrium adsorption capacity was 147.06 mg/g at 25 °C, which was much higher than that of cellulose membrane (CM, 30.61 mg/g). According to the obtained results from the intraparticle diffusion, Body kinetic and diffusion-chemisorption models, film diffusion was the rate-limiting step and chemical adsorption was the main mechanism of Cr(VI) adsorption. The Cr(VI) adsorbed on the PEI-HOCM was completely reduced to Cr(III), suggesting that PEI-HOCM was not only useful for Cr(VI) removal but also good for its detoxification. The competitive uptakes from coexisting components (Na + , Mg 2+ , Ca 2+ , phenol, Cl − and NO 3 − ) were insignificant except H 2 PO 4 − and SO 4 2− which reduced the Cr(VI) uptake with a efficiency loss of 22–41%. Ionic strength had little effect on the adsorption in the range of 0–1000 mg/L NaCl. After five adsorption/desorption cycles, the PEI-HOCM still retained good adsorption capacity. More importantly, it can be separated easily after adsorption, which will greatly benefit the wastewater treatment by simplifying the separation procedure and reducing costs. Graphical abstract
研究领域:
环境科学
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材料科学
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高影响因子
MICROCHEMICAL JOURNAL
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2019
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IF 3.206
Yang Wang,Liujing Xu,Wen Xie
Peroxidase reaction is known as a classical reaction that is widely used in the analytical chemistry field because of not only the important peroxide analytes but also the key role of H 2 O 2 detection in various coupled enzyme systems. For this reason, exploiting appropriate enzymes with good catalytic properties, low cost, easy preparation, and simple operation for the reaction becomes extremely important for acquiring desired analytical performance. Herein, we proposed a simplified, rapid, and universal colorimetric platform based on the peroxidase-mimicking activity of I − for sensing applications. The I − species exhibited the peroxidase-like ability to catalyze the oxidation of colorless 3,3′,5,5′-tetramethylbenzidine (TMB) to blue TMBox in the presence of H 2 O 2 via the I 2 intermediate. Compared with natural bio-enzymes and emerging nanozymes , the homogeneous I − mimic provided excellent activity to trigger the color reaction faster. More importantly, commercial reagents were able to be used directly, thus avoiding the tedious preparation and purification processes required in bio-enzymes and nanozymes. As a result, the fabricated platform could be used to detect H 2 O 2 within 3 min, providing a linear range of 1.7–166.7 μM and a detection limit of 1.1 μM. Given that Hg 2+ could suppress the color reaction through formation HgI 2 , the Hg 2+ target (20–80 nM) was also determined rapidly. Practical measurements demonstrated the reliability of the colorimetric assay . It is believed that the general platform based on the H 2 O 2 + TMB + I − reaction holds broader applications in other analytical systems.
研究领域:
分析化学
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生物医学工程
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2021
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IF 7.46
Jinjie Hou,Pei Jia,Kairong Yang,Tong Bu,Xinyu Sun,Li Wang
In the last decades, nanozymes have drawn significant attention because of their higher stability and lower preparation cost than natural enzymes. In this report, the novel Ru@V 2 O 4 nanocomposite with multi-enzyme-like activities has been synthesized via one-step hydrothermal method and simple stirring. It was proved that the prepared Ru@V 2 O 4 nanowires presented magnificent tetra-enzyme-like activities, comprising oxidase-like (OD-like), peroxidase-like (POD-like), catalase-like (CAT-like) and superoxide dismutase-like (SOD-like) activity. Firstly, the kinetic investigation validated the OD and POD-mimics behaviors of Ru@V 2 O 4 nanowires, which were in conformity with the Michaelis-Menten kinetics. Then a bifunctional colorimetric sensing platform was constructed for the sensitive detection of H 2 O 2 and cysteine (Cys) on the basis of POD-like and OD-like enzyme activities of Ru@V 2 O 4 nanowires. H 2 O 2 could be detected by Ru@V 2 O 4 nanowires over a range of 1–500 μM and the response limit was 0.788 μM. Under optimal conditions, the degree of discoloration was linearly proportional to the concentration of Cys in the range of 3–50 μM with a low detect limit of 0.139 μM. Besides, Ru@V 2 O 4 nanowires can detect H 2 O 2 in water samples and Cys in serum samples. Therefore, this research significantly expands the application of the tetra-enzyme mimetic Ru@V 2 O 4 nanowires in the fields of biosensing, biocatalysis, environmental monitoring and medical diagnosis.
研究领域:
生物传感
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纳米材料
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医学诊断
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环境监测
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2023
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IF 8.6
Jiahao Zhu,Jianqing Ma,Sijing Yao,Mika Erik Tapio Sillanpää,Minghua Zhou,Chensi Shen,Qing Ye,Huixia Jin,Kefeng Zhang
Heterogeneous Fenton-like systems using H 2 O 2 as an oxidant have been extensively investigated in acidic and neutral conditions, but usually, they become ineffective under alkaline conditions. In this study, a cuprous graphitic carbon nitride material (Cu–CN) was prepared that can generate singlet oxygen ( 1 O 2 ) from H 2 O 2 . The results demonstrate that at pH 11, 95 % of 50 mg/L p -chlorophenol (4-CP) can be effectively eliminated within 120 min. Through semi-quantitative analysis and density functional theory calculations, it has been confirmed that 1 O 2 is the dominant reactive oxygen species in this system under alkaline conditions. The main pathway for 1 O 2 generation involves the formation of a complex between · O 2 – and Cu(II)-N sites, and the subsequent intramolecular electron transfer. To enhance the stability and separation performance of this catalyst, polyethylene glycol (PEG) was employed as a binder to combine Cu–CN with Fe 3 O 4 . The terminal hydroxyl groups in PEG were cross-liked by metals, thus forming a solid and magnetic composite (CuFe@PEG). Compared to Cu–CN, CuFe@PEG exhibited remarkable performance with 93 % retention of its original capacity for 4-CP removal at pH 11. Furthermore, after seven cycles, the degradation efficiency only decreased by 6.36 %. This study introduces a novel approach for utilizing Fenton-like reactions in treating alkaline wastewater.
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高影响因子
NEW JOURNAL OF CHEMISTRY
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2023
·Vol. 47
·期 39
·18476-18484
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IF 3.3
Bin Liu,Haoliang Ruan,Chengyi Li,Jie Yao,Bei Wei,Lei Wang,Shurong Ban,Jun Xie
In this work, InCex nanoparticles with different In–Ce ratios were synthesized by a simple co-precipitation method and InCex nanoparticles could be used as a mimic of peroxidase to catalyze the oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB) by H2O2 and produce the typical blue ox TMB. In addition, the prepared InCex nanoparticles showed excellent peroxidase-like catalytic properties compared with pure CeO2 and pure In2O3. InCe0.1 exhibited the best peroxidase-like activity, which was mainly attributed to the indium–cerium synergy, which accelerated the TMB and H2O2 electron transfer rate between them. Based on the above findings, a facile and sensitive H2O2 detection system with a sensitive response range of 10–100 μM and a detection limit of 5 μM for H2O2 was successfully proposed. This work synthesizes nanomaterials with peroxidase-like activity by modifying In2O3 through a simple co-precipitation method and offers new insights into the search for novel peroxidase mimics.
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高影响因子
APPLIED SURFACE SCIENCE
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2023
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IF 6.7
Xifeng Zhang,Yuting Li,Juan Wang,Gaofeng Zeng,Qin Zhong
Electrooxidation of 5‑Hydroxymethylfurfural (HMF) is considered a promising strategy for replacing the sluggish oxygen evolution reaction (OER) of electrolytic water, which can reduce the consumption of hydrogen production and the risk of gas mixing and obtain value-added products. Herein, a nanosheet with nanoflower catalyst (H-0.3Co-Ni 3 S 2 ) was synthesized via a one-step hydrothermal process with the assistance of hydrogen peroxide (H 2 O 2 ) for the electrooxidation of HMF. Adding H 2 O 2 and Co can decrease Ni's outer layer electronic cloud density, which benefits the catalyst's oxidation and catalyzes the HMF electrooxidation. H-0.3Co-Ni 3 S 2 shows the superior performance of the HMF electrochemical oxidation with the initial potential of 1.25 V vs. RHE and the voltage of 1.38 V vs. RHE at 200 mA cm −2 under the electrolyte of 1 M KOH with 10 mM HMF. The conversion rate, yield and Faraday efficiency of HMF electrooxidation for H-0.3Co-Ni 3 S 2 in the electrolyte of 1 M KOH with 10 mM HMF are 98.2 %, 97.6 % and 97.6 %, respectively. Besides, we provide a novel stepwise electrolysis strategy that can inhibit OER effectively while electrolyzing large-concentration HMF rapidly. Finally, in an electrolyte of 1 M KOH with 30 mM HMF, the conversion rate, yield and Faraday efficiency achieve 100 %, 91.9 % and 97.4 %, respectively.
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高影响因子
Journal of Environmental Chemical Engineering
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2023
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IF 7.7
Kang Hoon Lee,June Young Kim,Imtiaz Afzal Khan,Jae Won Lee,Jong-Oh Kim
This study aimed to optimize the ultraviolet (UV)/hydrogen peroxide (H 2 O 2 ) process for degrading chemicals of emerging concern (CECs), such as caffeine (CAF), atenolol (ATL), acetaminophen (ACT), and chlortetracycline (CTC). The CECs used in this study were chosen because they are used in various industries, affect water bodies, and are difficult to degrade using conventional oxidation and biological processes. The individual degradation results revealed that the CAF degradation rate increased from 23 ± 2%–80 ± 4% as the UV/H 2 O 2 dose increased from 1 to 10 mg·L −1 . Similarly, the ATL, ACT, and CTC degradation rates increased from 59.23 ± 2%, 34.21 ± 1.9%, and, 41.36 ± 2.3%–91.24 ± 3%, 68.12 ± 3%, and 91.93 ± 3.1%, respectively. The complex feed water analysis results revealed that CTC had a higher degradation rate than the other targeted contaminants owing to its higher degradation potential. The rate of reaction results revealed that the degradation of these CECs followed the pseudo-first-order reaction, with R 2 > 0.95 in all cases. liquid chromatography with tandem mass spectrometry (LC–MS/MS) was used to identify the degradation products , and the results revealed the presence of low-molecular-weight organic products due to oxidation. The organic products were formed because of the hydroxylation and demethylation of intermediates and photoproducts, which caused a ring opening and generated several low-molecular-weight carboxylic acids before complete mineralization. These results illustrate that the UV/H 2 O 2 process had some significant effects on the complex mixture. However, CTC exhibited a relatively high degradation rate, which is believed to have inhibited the degradation of other chemicals.
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高影响因子
Journal of Environmental Chemical Engineering
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2023
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IF 7.7
Danya Zhan,Qiongfen Yu,Ming Li,Zhenhua Gu,Shengnan Sun,Yinning Li,Aimin Li,Rong Zhu,Zhongfan Mo,Runfang Ma
Utilizing biological resources facilitates alleviating energy shortage and environmental pollution problems, but high-value utilization of these resources requires breaking the biomass structure. This study realized the clean and efficient separation of cellulose, hemicellulose, and lignin from tobacco stems using a sustainable H 2 O 2 -enhanced alkaline pretreatment combined with acid and ethanol precipitation. The purity and thermal stability of the separated cellulose increased from 32.49% to 92.41% and 261 °C to 369 °C, respectively. Changes in the cellulose crystal form and the solubilization mechanisms of hemicellulose and lignin were elucidated. In addition, a food-preservation film was prepared from the obtained biocellulose using the solution-casting method. After adding glycerol and sorbitol as plasticizers , the tensile strength and water-contact angle (a hydrophobicity indicator) of the biocellulose composite film increased from 125 MPa to 154 MPa and from 50.48° to 73.16°, respectively. This study provides a platform for lignocellulosic biomass separation, renewable utilization, and a practical route toward functional biomaterial production.
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2023
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IF 8.4
Yu Liu,Fangfang Wang,Yawen Liu,Lu Cao,Haiming Hu,Xiaowei Yao,Junping Zheng,Hongtao Liu
Label-free gold nanoparticles (AuNPs) plasmonic sensors are limited in the biological assay for weak expansibility. Here, a novel H 2 O 2 -sensing AuNPs plasmonic sensor was proposed using 3, 3′, 5, 5′-tetramethylbenzidine (TMB) redox catalysis of H 2 O 2 -indcued cysteine oxidation for AuNPs coloration (TreHOAuC), and the application of TreHOAuC was examined by combining H 2 O 2 -generating oxidase. In the TreHOAuC platform, TMB is transformed into oxidized TMB (oxTMB) by horseradish peroxidase in the presence of H 2 O 2 , and oxTMB is restored into TMB after oxidizing cysteine into cystine. The redox cycling of TMB boosts H 2 O 2 -induced cysteine oxidation, and the cysteine oxidation is visualized by AuNPs. Critical parameters of the TreHOAuC platform were optimized such as concentration, time, pH, and buffer. Using the TreHOAuC system, H 2 O 2 can be specifically sensed by naked eyes within 2 min, and the detection limit was less than 0.5 μM. As a proof-in-conception, a cholesterol oxidase-paired TreHOAuC system was used to detect cholesterol in serum samples, indicating a linear range of 2–40 μM and great preciseness. In summary, our proposed TreHOAuC method provided a novel and more comprehensive application for biological sensing.
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高影响因子
危险品化学品经营许可证（带存储）