CHEMICAL ENGINEERING JOURNAL
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2021
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IF 13.273
Yujun Ju,Hua Li,Ze Wang,Hanwen Liu,Shuhui Huo,Shan Jiang,Sicong Duan,Yonggang Yao,Xiaoquan Lu,Fengjuan Chen
Organic pollutants in wastewater have raised great concerns because of their considerable risk to human health and the ecosystem. Although Fenton reaction of advanced oxidation process represents a promising water treatment strategy. However, continuous consumption and low utilization efficiency of H 2 O 2 limit its practical application. Herein, we propose photocatalytic in-situ production and activation H 2 O 2 at triphase interface to reach excellent removal efficiency for contaminants. The triphase interface configuration allows oxygen rapid diffusion from the air to the surface of photocatalyst and avoids the problem of poor mass transfer of oxygen in solution. Meanwhile, using the Z-type heterojunction MIL-101(Fe)/g−C 3 N 4 as model photocatalysts could largely promote the photo-induced electrons and holes separation efficiency to further improve reaction efficiency. As a result, the triphase photocatalytic system achieved an in-situ H 2 O 2 production rate of 4370 μmol h −1 (greater than5 times higher than the diphase control) and a superior degradation efficiency for organic pollutants (model pollutant: methyl orange, concentration: 10 ppm, 99% removal rate in 130 min, while only 21% in diphase control) with a 17.5 times higher reaction rate constant. Therefore, the triphase photocatalytic system realized the highly efficient degradation of organic pollutants in wastewater by solar-driven, in-situ generation and activation of H 2 O 2 with high catalytic activity and minimized oxygen transport limitation, thus providing a green and sustainable strategy for wastewater treatment and broadly environmental remediation.
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
CHEMICAL ENGINEERING JOURNAL
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2021
·
IF 13.273
Yuanfeng Wei,Weijian Yang,Zhimin Wang,Kai Yin,Tao Chen,Chengbin Liu
Iron oxide-modified biochars are increasingly recognized as a promising arsenic adsorbent. However, most of them face serious challenges in the rapid and efficient removal of As(III). Herein, we integrated the iron oxide nanoneedles vertically covered biochar fibers (Fe-BFs) with H 2 O 2 and Hydroxylamine (HA) to construct a heterogeneous catalytic system for the rapid oxidation and deep removal of As(III) from water. The system oxidized the As(III) to As(V) with high efficiency, and then the generated As(V) could be rapidly removed by adsorption onto Fe-BFs. The removal efficiency of As(III) by Fe-BFs/H 2 O 2 /HA at 120 min reached up to 98.93%, which is much higher than that of by Fe-BFs (69.20%) and Fe-BFs/H 2 O 2 (92.32%). The system could work reliably in a wide pH range (4–10). Moreover, fixed-bed column experiments demonstrated that the addition of H 2 O 2 and HA could increase the effective treatment volume from ~350 bed volume (BV) to ~700 BV to meet the drinking water standard (<10 μg/L). The introduction of HA induced the reduction of surface Fe(III) of Fe-BFs to surface Fe(II), which reacted with H 2 O 2 to produce OH. The OH played a very important role in promoting the removal of As(III). This study offers a new strategy to enhance the applicability of Fe modified biochar for As(III) removal.
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
Experimental and Therapeutic Medicine
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2021
·Vol. 22
·期 5
·1-9
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IF 2.447
Di Zhang,Jianxin Sun,Shiquan Chang,Xing Li,Huimei Shi,Bei Jing,Yachun Zheng,Yi Lin,Guoqiang Qian,Yuwei Pan,Guoping Zhao
The aim of the present study was to assess the protective effects of 18β‑GA against hydrogen peroxide (H2O2)‑induced injury. First, the SMILES annotation for 18β‑GA was used to search PubChem and for reverse molecular docking in Swiss Target Prediction, the Similarity Ensemble Approach Search Server and the TargetNet database to obtain potential targets. Injury‑related molecules were obtained from the GeneCards database and the predicted targets of 18β‑GA for injury treatment were selected by Wayne diagram analysis. Subsequently, Kyoto Encyclopedia of Genes and Genomes analysis was performed by WebGestalt. The experimental cells were assorted into control, model, 10 µM SB203580‑treated, 5 µM 18β‑GA‑treated and 10 µM 18β‑GA‑treated groups. Hoechst 33258 staining was performed and intracellular reactive oxygen species (ROS) levels, cell apoptosis, Bcl‑xl, Bcl‑2, Bad, Bax, cleaved‑caspase 3, cleaved‑caspase 7, transient receptor potential ankyrin 1 (TRPA1) and transient receptor potential vanilloid 1 (TRPV1) levels, as well as p38 MAPK phosphorylation were measured. The ‘Inflammatory mediator regulation of TRP channels’ pathway was selected for experimental verification. The results indicated that 10 µM 18β‑GA significantly increased cell viability as compared with the H2O2‑treated model group. As suggested by the difference in intracellular ROS fluorescence intensity, 18β‑GA inhibited H2O2‑induced ROS production in Schwann cells. Hoechst 33258 staining indicated that 18β‑GA reversed chromatin condensation and the increase in apoptotic nuclei following H2O2 treatment. Furthermore, flow cytometry suggested that 18β‑GA substantially inhibited H2O2‑induced apoptosis. Pre‑treatment with 18β‑GA obviously reduced Bad, Bax, cleaved‑caspase3, cleaved‑caspase 7, TRPA1 and TRPV1 levels and p38 MAPK phosphorylation after H2O2 treatment and increased Bcl‑2 and Bcl‑xl levels. In conclusion, 18β‑GA inhibited Schwann cell injury and apoptosis induced by H2O2 and may be a potential drug to prevent peripheral nerve injury.
研究领域:
药理学
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神经科学
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细胞生物学
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DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
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2021
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IF 6.707
Bing Zhang,Shan Wang,Chuntian Qiu,Yangsen Xu,Jiandong Zuo
Porous carbon nitride photocatalysts with sufficient cyanide groups were facile fabricated through simple calcination process with cheap salt as porogen. The introduction of cyanide groups can enhance charge separation efficiency and reductive activities of photogenerated electrons of carbon nitride. The optimized CN-S catalysts can selectively oxidize alcohols to aldehydes with broad scope as well as reduce oxygen to H 2 O 2 . The tandem strategy can photocatalytic produce H 2 O 2 with a rate of more than 200 μmol h −1 g −1 which is nearly 19 times than that without alcohols and fulfilled utilization of both photo-generated electrons and holes.
研究领域:
材料科学
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环境科学
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化学工程
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DOI
高影响因子
ANALYST
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2013
·Vol. 138
·期 7
·2080-2084
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IF 3.969
Shasha Wang,Zhaopeng Chen,Ling Chen,Ruili Liu,Lingxin Chen
A novel label-free colorimetric strategy was reported for sensitive detection of copper ions (Cu2+) by using the decelerating etching of gold nanorods (GNRs). H2O2 was employed as the oxidant for corrosion of GNRs, leading to the decrease of the aspect ratio of GNRs. In the absence of Cu2+, the redox corrosion of GNRs by H2O2 occurred rapidly, causing the distinct color change of GNRs from bluish green to purplish red. By virtue of the strong and specific catalysis by Cu2+ of the decomposition of H2O2, the rate of redox corrosion can be decelerated. Relevant experimental parameters, including pH value, concentrations of NaSCN and H2O2, incubation temperature and time were evaluated. Under optimal conditions, our method gave a good linear range of 10–300 nM (R = 0.9985) for Cu2+ and the detection limit with the naked eye is as low as 10 nM. Thus, the proposed colorimetric sensor is simple, sensitive (4.96 nM) and selective, and it has been successfully applied to detect Cu2+ in shellfish samples. Moreover, the potential mechanism was also discussed.
研究领域:
分析化学
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纳米技术
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环境科学
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DOI
PubMed
高影响因子
Journal of Cleaner Production
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2023
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IF 11.1
Anlin Xu,Wanqun Liu,Ziyan Yang,Liya Cao,Ignasi Sirés,Qiqi Zhang,Yongjun Zhang
The electrochemical production of H 2 O 2 using small- and medium-size modular devices has emerged as an interesting approach for water treatment . In this work, waste tire-derived carbon (WTC) has been innovatively employed as a cheap and recycled electroactive material to manufacture a gas-diffusion cathode. It was found that acidification with HNO 3 significantly enhanced the H 2 O 2 production, attaining a concentration of up to 1161 mg/L with a current efficiency around 40 %–60 %. These results were superior to those obtained by treating the WTC with H 2 SO 4 or KOH, being also better than the values reached with reported carbons. Liner and cyclic voltammetries informed about the oxygen reduction reaction profiles; transmission electron microscopy revealed the morphological features of the synthesized carbons, whereas other properties were obtained by Brunauer−Emmett−Teller analysis, Fourier transform infrared spectrometry and X-ray photoelectron spectroscopy. The cathode was further employed to degrade tinidazole (TNZ), a typical nitroimidazole antibiotic, in water by electro-Fenton at pH 3.0, producing more than 10 mM H 2 O 2 . The effect of solution pH, Fe 2+ dosage and initial TNZ concentration was investigated. Under optimal conditions (0.5 mM Fe 2+ and 20 mA/cm 2 ), the treatment of solutions containing 20 mg/L TNZ at pH 3.0 yielded a pseudo-first-order constant ( k 1 ) of 0.449 min −1 . Besides, the degradation pathways were proposed according to the 7 identified transformation products . This study demonstrates that waste tires can become a source of inexpensive carbon able to catalyze the in-situ H 2 O 2 synthesis for water decontamination , in excellent agreement with new policies on circular economy .
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2023
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IF 6.2
Xuechang Ren,Suying Ding,Renhua Chen,Zhenyu Yang,Miao Tian,Ning Fu
Although CuFe 2 O 4 has been widely used in the field of Fenton-like wastewater treatment, its ability to activate H 2 O 2 still needs to be further improved. In this context, a novel Ag x /CFO OVs (x represents the theoretical mass percentage of Ag) composite catalyst was prepared by the tartaric acid reduction method for the first time, and its degradation performance and degradation mechanism of Phenol in a H 2 O 2 -based Fenton-like system were investigated. Through a series of characterizations, the successful preparation of the catalyst was confirmed. The degradation experiment showed that the degradation rate of 50 mg/L Phenol by Ag 2 /CFO OVs /H 2 O 2 system was 98.55% within 15 min, which was a significant improvement in the degradation efficiency compared with that of CuFe 2 O 4 and CFO OVs . X-ray photoelectron spectroscopy (XPS) and electron spin resonance (ESR) confirmed the successful introduction of oxygen vacancies (OVs). Electrochemical impedance spectroscopy (EIS) showed that Ag 2 /CFO OVs had the lowest impedance, and the synergistic effect of OVs and Ag effectively enhanced the degradation capability of the catalysts for Phenol. The capture experiments of active species and ESR tests showed that the main active species of the Ag 2 /CFO OVs /H 2 O 2 system were 1 O 2 and • OH. This study provides a new reference for the introduction of OVs and Ag in Fenton-like catalysts and their application to wastewater treatment.
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高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
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2023
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IF 7.8
Xiaoqin Zhang,Jing Yang,Yueli Chen,Jia Tang,Aiping Zhang
Fe 0 and MoS 2 can synergistically activate H 2 O 2 to generate free radicals for the removal of refractory organic compounds. This study aims to evaluate the Fe 0 -H 2 O 2 -MoS 2 process for the removal of refractory organic compounds from bio-treated landfill leachate (BTL) under continuous operation mode . The results show that the dosage of H 2 O 2 , Fe 0 and MoS 2 all affect the removal effect of the Fe 0 -H 2 O 2 -MoS 2 process on refractory organics during continuous operation. The removal rates of total organic carbon , absorbance at 254 nm and chroma at an initial pH of 3, [H 2 O 2 ] of 5 mM, Fe 0 of 0.4 g/L, MoS 2 of 0.4 g/L and reaction time of 60 min were 65.83%, 85.11% and 93.14%, respectively. The Fe 0 -H 2 O 2 -MoS 2 process can not only effectively destroy the complex structure of refractory organic compounds in the BTL treatment but also reduce the biological toxicity of BTL to a certain extent. In addition, a high organic removal rate can still be maintained during the long-term dynamic reaction process. Therefore, the Fe 0 -H 2 O 2 -MoS 2 process has excellent performance in removing refractory organic compounds from BTL under continuous operation conditions.
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高影响因子
Journal of Materials Chemistry B
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2021
·Vol. 9
·期 8
·1988-2000
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IF 6.331
Xiangyu Meng,Xuezhong Zhang,Yunfeng Lei,Dongwei Cao,Zhifei Wang
Chemo/chemodynamic synergistic therapy is a promising strategy to improve the antitumor effect. However, hypoxia and a limited amount of hydrogen peroxide (H2O2) in the tumor microenvironment (TME) severely restrict the therapeutic efficacy of this combined treatment. Herein, we report biodegradable doxorubicin (Dox)-loaded copper–metformin (Met) nanoscale coordination polymers (Dox@Cu–Met NPs), which exert a chemo/chemodynamic synergistic therapeutic effect by reducing oxygen (O2) consumption to promote H2O2 accumulation in the tumor. Inside tumor cells, Met can inhibit the consumption of O2 to relieve tumor hypoxia by suppressing mitochondrial respiration. The alleviated-tumor hypoxia can not only elevate H2O2 content via the Dox-activated cascade reaction of nicotinamide adenine dinucleotide phosphate (NADPH) oxidases (NOXs) and superoxide dismutase (SOD), but also improve the efficacy of Dox. More importantly, the depletion of glutathione (GSH) accompanies the whole treatment process, which can realize the conversion of Cu2+ to Cu+ and boost reactive oxygen species (ROS) accumulation to improve chemodynamic therapy (CDT) efficacy. Meanwhile, Met is expected to cut off the energy supply by inhibiting respiration, leading to starvation therapy. In vivo investigations demonstrate that tumor growth is significantly inhibited through the enhanced chemo/chemodynamic synergistic treatment. This work provides a new paradigm for cancer therapy using an economical and straightforward method to construct a synergistic nanomedicine platform.
研究领域:
癌症治疗
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纳米医学
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药学
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生物医学工程
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DOI
PubMed
高影响因子
ACS ES&T Engineering
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2020
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IF 0
Feng Li,Yingxin Gao,Min Yang
Oil–inorganic material interactions at the oil/water interface have been extensively investigated as a fundamental research area. However, less focus has been placed on the oil/water interfacial process during the oily waste treatment process. In this study, the detailed oil/water interfacial destabilization process of a floated oily sludge (FOS) solution during Fenton-like treatment is investigated. A maximum of 66.1% of oil recovery was obtained from the FOS samples after the treatment. The influence of experimental conditions such as pH, hydrogen peroxide concentration, and reaction time on the oil percentage of sediments after treatment is also studied. The reduction of oil percentage in the FOS reached 77.5%, which indicated the high efficiency of the treatment. Rheological experiments showed that the bridge between the oil and coagulant mixtures in the FOS was destroyed after the addition of H2O2. Half of the H2O2 (a total of 50 mM) was consumed, though nearly no free Fe2+ could be detected in the FOS solution at a neutral pH. Electron paramagnetic resonance experiments demonstrated an enhanced generation of ·OH that occurred due to the catalytic decomposition of H2O2 by interfacial-active complexes (IAC). The interfacial destabilization process was triggered using a direct reaction of H2O2 and iron-containing components in the IAC, as well as ·OH induced oxidation of the sulfur-containing components in the IAC at the oil/water interface. This research may provide a better understanding of oil–inorganic interactions at the oil/water interface during oily waste treatment and provide insight for the development of future processing strategies for oil recovery from oily sludge.
研究领域:
环境科学
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化学工程
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2020
·
IF 16.683
Shangyi Li,Jun Huang,Zhuoxing Ye,Yaozhong Wang,Xukai Li,Jing Wang,Laisheng Li
In the peroxone process (O 3 /H 2 O 2 ), OH yield ratio with respect to O 3 consumption was low due to the competition experiments. Singular effectiveness of Co Ce as a supporting ligand in the interface of ozone-H 2 O 2 -catalysts and related complexes formed on catalysts enhanced the electron transfer between ozone chain reaction and various chemical state of Ce/Co. A computationally determined stereochemical structure corroborated that the Co Ce synergistic effect led to the region around Co atom (electron donor) with low Gibbs free energy to form OH. Meanwhile, reactive oxygen species (ROSs) were tend to attack the sites with very negative natural population charge or high frontier electron density (FED) values of sulfamethazine (SMT) by LC–MS/MS and density functional theory (DFT) calculations. Benefiting from the unique superoxide complexes and synergetic effect of Co Ce, the Co10Ce10@MCM-48 catalysts showed superior performance of SMT mineralization (64.1 %, 120 min), which resolved the low-efficient ROSs generation in bare peroxone reaction.
研究领域:
环境科学
·
催化化学
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高影响因子
Catalysts
·
2020
·Vol. 10
·期 3
·303
·
IF 3.52
Yaodan Wang,Hongyan Pan,Qian Lin,Yongyong Shi,Jiesong Zhang
Hydrogen peroxide (H2O2), as a clean and green oxidant, is widely used in many fields. The direct synthesis of H2O2(DSHP) from H2and O2has attracted most research interest because it relates to a facile, environmentally friendly, and economic process. Yolk–shell Pd-M@HCS (hollow carbon sphere) (M = Co, Ni, Cu) nanocatalysts, in which the bimetal nanoparticle is the core and porous carbon works as the shell layer, are reported in this work. It was found that catalytic activities were enhanced because of the introduced M metals. Additionally, the different mass ratios of Pd to Co (mPd/mCo) were further investigated to improve the catalytic performance for the DSHP. When mPd/mCo was 4.4, the prepared Pd-Co@HCS-(4.4) catalyst, with an average Pd nanoparticle size of 7.30 nm, provided the highest H2O2selectivity of 87% and H2O2productivity of 1996 mmolgPd−1·h−1, which were increased by 24% and 253%, respectively, compared to Pd@HCS.Keywords:direct synthesis of hydrogen peroxide;Pd-based catalyst;yolk–shell structure
研究领域:
化学工程
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催化科学
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高影响因子
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