ENVIRONMENTAL RESEARCH
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2025
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IF 7.7
Mengru Shi,Weijiang Tang,Sheng Guo,Fengxi Chen
Emerging antibiotic pollutants pose long-term risks to ecosystems and human health, necessitating the development of advanced elimination technologies. In this study, hierarchically porous α-Fe 2 O 3 nanosheets (α-Fe 2 O 3 -PNS) were prepared from an iron-polyvinylpyrrolidone (Fe-PVP) hybrid gel, where PVP served multiple functions, including iron immobilization, morphology template, pore formation, and crystallite growth regulation. As an efficient heterogeneous Fenton-like catalyst, α-Fe 2 O 3 -PNS achieved 93.6 % degradation of tetracycline (TC, 25 mg/L) within 2 h under mild conditions (25 °C, pH 5) using only 4 mM H 2 O 2 . The reaction followed pseudo-first-order kinetics with a high rate constant (0.0606 min −1 ) and an outstanding normalization factor (8.13). Key operational parameters (i.e., PVP dosage, catalyst loading, H 2 O 2 concentration, initial pH, coexisting anions and natural organic matter) were investigated. The material exhibited good reusability over five consecutive cycles and maintained robust performance in real water matrices. Its superior catalytic activity originated from exposed (113) crystal planes, abundant accessible iron sites, and rapid Fe 3+ /Fe 2+ redox cycling facilitated by the large surface area. Radical quenching tests and electron paramagnetic resonance spectroscopy confirmed that hydroxyl radicals, generated via surface Fe 2+ -mediated H 2 O 2 activation, are dominant reactive species, driving TC degradation through hydroxylation, oxidative cleavage, and ring-opening reactions. This study provides an energy- and resource-efficient solution for sustainable water remediation, operating effectively under ambient and circumneutral conditions with low H 2 O 2 consumption.
研究领域:
环境催化
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材料科学
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水处理技术
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纳米材料化学
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污染控制工程
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DOI
PubMed
高影响因子
ENVIRONMENTAL RESEARCH
·
2024
·
IF 7.7
Xuan Luo,Ruiying Zhu,Li Zhao,Xiaobo Gong,Lingrui Zhang,Lu Fan,Yong Liu
Tetracycline hydrochloride (TC) accumulates in large quantities in the water environment, causing a serious threat to human health and ecological environment safety. This research focused on developing cost-effective catalysts with high 2e - selectivity for electro-Fenton (EF) technology, a green pollution treatment method. Defective nitrogen-doped porous carbon (d-NPC) was prepared using the metal-organic framework as the precursor to achieve in-situ H 2 O 2 production and self-decomposition into high activity ·OH for degradation of TC combined with Co 2+ /Co 3+ . The d-NPC produced 172.1 mg L −1 H 2 O 2 within 120 min, and could degrade 96.4% of TC in EF system. The self-doped defects and graphite-nitrogen in d-NPC improved the oxygen reduction performance and increased the H 2 O 2 yield, while pyridine nitrogen could catalyze H 2 O 2 to generate ·OH. The possible pathway of TC degradation was also proposed. In this study, defective carbon materials were prepared by ball milling, which provided a new strategy for efficient in-situ H 2 O 2 production and the degradation of pollutants.
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL POLLUTION
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2024
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IF 7.6
Jiawen Zhang,Shanjian Liu,Fupeng Huang,Dongmei Bi,Jie Song,Santao Chou
To investigate the impact of different H 2 O 2 concentrations on the Fenton-like systems of H 2 O 2 /biochar, this study examined the mechanism of the physical structure and environmental persistent free radicals (EPFRs) of biochar during diethyl phthalate (DEP) removal by the Fenton-like system. The peak-splitting method was utilized to differentiate EPFRs types in cotton stalk biochar produced at different temperatures. High-temperature environments promote π-electron delocalization, which facilitates phenyl π free radicals and σ-π oxygen-containing free radicals. By analyzing relationships between the removal rate K 1 and removal constant K obs of DEP with the structural properties of biochar, it was discovered that EPFRs concentrations in biochar had a significant positive correlation with K 1 (r = 0.92) and K obs (r = 0.97). Different H 2 O 2 concentrations added to the biochar removal system resulted in varied DEP removal efficiency. Among them, CS 500 , CS 550 , and CS 600 exhibited superior DEP removal efficiency when H 2 O 2 concentration was 5 mM.
研究领域:
环境科学
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化学
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Yanping Cui,Haodong Yang,Xian Xiang,Shibo Zhao,Qiao Huang,Zhaoqiang Huang
A modified graphite felt (MGF) was prepared with carbon black (CB) and polytetrafluoron (PTFE) for cathodic electrochemical H 2 O 2 production, which was used in a flow-through cathodic electro-Fenton reactor to degrade chlorinated hydrocarbons. Cathode electrode was floating on aqueous surface and 369.1 mg/L H 2 O 2 could be produced after 1 h 150 mA power applied without O 2 aeration. The main O 2 source for H 2 O 2 production was confirmed from air with this floating position. In a 2.0 L flow-through cathodic electro-Fenton system, 95.97 % degradation efficiency for 5.0 mg/L trichloroethylene (TCE) was achieved in 90 min with 13.4 mL/min influent rate. Reducing the reactor volume to 0.14 L, 5.0 mg/L TCE could be degraded completely in 10 min with continuous 4 L influent. The mixed chlorinated hydrocarbons (TCE, cis -1,1-dichloroethylene, 1,2-dichloroethane, and dichloromethane) were also rapidly degraded in 20 min. The flow-through cathodic electro-Fenton reactor presented excellent degradation ability for chlorinated hydrocarbons with a smaller volume. In the simulated sand tank system, after continuously operated 27 days, H 2 O 2 concentration in electrode well was still remained at 80 mg/L. In the contaminated field in Tianjin, China, H 2 O 2 yield of MGF in groundwater could keep at about 60 mg/L after 220 min operating.
研究领域:
环境科学
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电化学工程
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Meixuan Wu,Renshu Wang,Lin Miao,Pengfei Sun,Baocheng Zhou,Yubing Xiong,Xiaoping Dong
Pollution of microplastics (MPs) has been drastically threating human health, however, whose elimination from the environment by current approaches is inefficient due to their high molecular weight, strong hydrophobicity and stable covalent bonds. Herein, we report a novel and highly-efficient route to degrade MPs contaminants through synergistically piezocatalytic and Fenton-like activation of H 2 O 2 by a ferroelectric Bi 12 (Bi 0.5 Fe 0.5 )O 19.5 catalyst under ultrasound treatment. For 10 g/L polyethylene terephthalate microplastics (PET-MPs), the synergistic strategy reached a 28.9 % removal rate in 72 h, which is greatly enhanced in comparison to the individual piezocatalysis and Fenton (Fenton-like) activation. By optimizing the types of oxidants (H 2 O 2 , peroxymonosulfate and peroxydisulfate) and bismuth ferrite catalysts (non-piezoelectric Bi 2 Fe 4 O 9 and piezoelectric BiFeO 3 /Bi 12 (Bi 0.5 Fe 0.5 )O 19.5 ), it was revealed that H 2 O 2 is the best oxidant, and the piezoelectric Bi 12 (Bi 0.5 Fe 0.5 )O 19.5 with a high aspect-ratio morphology showed higher activity than the Bi 2 Fe 4 O 9 and BiFeO 3 . The catalyst dosage and H 2 O 2 concentration were further optimized, and the good durability of the catalyst was also demonstrated through multiple uses. Different characterization technologies demonstrated the occurrence of PET-MPs oxidation and fragmentation during the treatment process. The plausible mechanism of synergistically piezocatalytic and Fenton-like H 2 O 2 activation was proposed based on measurements of band structure, piezoelectric property and reactive oxygen species generation. Finally, we detected the intermediates and determined a possible degradation route of PET-MPs. The toxicity assessment indicated that the produced intermediates have low toxicity and potential risks to the environment.
研究领域:
环境科学
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催化化学
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产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
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2024
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IF 4.9
Qi Xiao,Jiawen Li,Shuai Liu,Mingli Yang,Yi Fang,Shan Huang
Given the pivotal role of hydrogen peroxide (H 2 O 2 ) in numerous biological progresses, there has been a recent surge in the development of highly effective electrochemical sensors for H 2 O 2 detection. In this article, we propose an enzyme-free amperometric system for the sensitive and selective recognition of H 2 O 2 , leveraging ultrafine PtPd alloy/ionic liquid-carbon dots (IL-CDs) nanocomposites modified flexible carbon fiber. The IL-CDs were synthesized through the direct electrodeposition of ionic liquid [BMIM][PF 6 ] using Pt sheets as electrodes. Subsequently, a sequential electrodeposition of IL-CDs, H 2 PtCl 6 , and PdCl 2 onto the activated carbon fiber (ACF) yielded the PtPd/IL-CDs/ACF microelectrode. This microelectrode serves as an enzyme-free amperometric sensor for H 2 O 2 detection, exhibiting an improved response with a significantly lower detection limit of 0.29 μM and a relatively broad linear range spanning from 2 to 6561 μM. Furthermore, this enzyme-free amperometric H 2 O 2 sensor demonstrates remarkable stability over extended periods and exceptional performance in practical applications, such as the analysis of commercially available milk, human serum, human urine, and living cancer cells analysis. This study offers a fresh perspective on amperometric sensors based on metal alloys and CDs electrode, highlighting the potential of enzyme-independent detection for hydrogen peroxide in biological systems.
研究领域:
生物医学工程
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分析化学
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产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
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2017
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IF 4.798
Hailan Huang,Chunlei Han,Guanwen Wang,Chunhua Feng
The development of renewable, low-cost, and high-efficiency cathode materials for oxygen reduction to H 2 O 2 is desirable for use in electro-Fenton systems for the oxidative treatment of wastewater. In the present study, we report the synthesis of a renewable biopolymer with lignin (lig) interpenetrated into a polypyrrole (PPy) framework via a simple one-step electropolymerization method. This allows the formation of PPy/lig composites that are uniformly coated on a graphite felt (GF) substrate, having large surface area, increased mechanical stability, and abundant C O (including quinone-type) groups. These features improved the electrocatalytic activity of the PPy/lig-GF cathode for oxygen reduction to H 2 O 2 when an optimal cathodic potential (−0.5 V vs. SCE) was applied, as evidenced by the observed higher H 2 O 2 electro-generation yield and efficiency compared to the raw GF and PPy/ClO 4 − -GF cathodes. Electro-Fenton systems equipped with the GF cathodes (either modified or unmodified) for the decolorization and mineralization of AO7 (an azo dye) followed a pseudo-first-order kinetic model . The PPy/lig-GF cathode achieved substantially higher rate constants and degradation efficiencies. In addition, the incorporation of lignin significantly improved the cycling stability of the cathode material.
研究领域:
环境科学
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材料科学
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电化学
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DOI
高影响因子
JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE
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2023
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IF 4.1
Bowei Du,Chao Zhang,Guiya Deng,Shuai Zhang,Shiqi Wang,Yuepeng Guan,Yaqin Huang
Background Nowadays, the prevalence of oxidative stress-related chronic diseases is increasing. The identification of novel antioxidant collagen-peptides to counteract oxidative stress for individuals’ health have gained significant intention. Results In this study, the collagen-peptides with antioxidant activities were separated and identified by ion chromatography (IEC), reversed-phase high-performance liquid chromatography (RP-HPLC), and liquid chromatography-tandem mass spectrometry (LC-MS/MS). The identified antioxidant collagen-peptides were further screened by molecular docking for Keap1-targeted peptide inhibitors and their theoretical interaction mechanisms were investigated. Four novel antioxidant collagen-peptides, GPAGPIGPVG, GPAGPpGPIG, ISGPpGPpGPA and IDGRPGPIGPA with high binding affinity to Keap1 were selected. Molecular docking results demonstrated that the putative antioxidant mechanism of four antioxidant collagen-peptides contributed to their blockage of Keap1-Nrf2 interactions. The results of antioxidant activity of four antioxidant collagen-peptides proved that IDGRPGPIGPA exerted a high scavenging capacity to DPPH and ABTS free radicals, while GPAGPpGPIG improved the resistance of cells to hydrogen peroxide (H 2 O 2 ) induced oxidative damage by promoting the activation of intracellular antioxidant enzymes and the production of reduced glutathione in human hepatoma (HepG2) cells. Conclusion The antioxidant collagen-peptides (GPAGPIGPVG, GPAGPpGPIG, ISGPpGPpGPA and IDGRPGPIGPA) will be developed as the novel functional food for human health in the near future. This article is protected by copyright. All rights reserved.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2020
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IF 10.652
Qizhan Zhang,Minghua Zhou,Zhicheng Lang,Xuedong Du,Jingju Cai,Lujie Han
High mineralization efficiency and low energy consumption are the core requirements for the application of electrochemical advanced oxidation processes (EAOPs) for organic pollutants degradation. Herein we reported innovative EAOPs using natural air diffusion electrode (NADE) to improve H 2 O 2 production and enhanced utilization efficiency by combination with electro-Fenton and photoelectro-Fenton (EF-PEF) for the degradation of 2,4-dichlorophenoxyacetic acid. At 0.2 and 1.2 A, the H 2 O 2 production on NADE possessed 158% and 188% of that on normal aeration electrode (AE) with the total energy consumption only 7.2% and 25.4% of that on AE, respectively. Such excellent H 2 O 2 production performance on NADE was attributed to ultra-high oxygen mass transfer efficiency and the feature of not requiring aeration, which reduced energy consumption greatly. A new H 2 O 2 utilization efficiency (HUE) evaluation index including decomposition ratio, conversion efficiency and total utilization efficiency of H 2 O 2 was proposed, demonstrating that PEF had a higher HUE than EF but not cost-effective due to a higher energy consumption. EF-PEF was thus proposed to upgrade the traditional PEF, which reduced energy consumption while maintained high mineralization efficiency. The HUE in EF-PEF process was greatly improved and superior to most reported EAOPs in literatures, which explained the high mineralization efficiency (78%–87%) with an extremely low energy consumption (0.065–0.167 kWh (g TOC) −1 ) even an order of magnitude lower than that in the literatures. This work enlightened the importance of two strategies of improving both H 2 O 2 production and utilization efficiency to maintain high mineralization efficiency in H 2 O 2 based EAOPs.
研究领域:
环境科学
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电化学工程
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产品关联
DOI
高影响因子
JOURNAL OF PHARMACEUTICAL AND BIOMEDICAL ANALYSIS
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2020
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IF 3.209
Shuyu Mei,Bingru Liu,Xiaoli Xiong,Xu Hun
PtCuCo trimetallic alloys (PtCuCo-TAs) are synthesized by one-step reduction. The chemiluminescence (CL) properties of PtCuCo-TAs are studied systemically. PtCuCo-TAs show good catalyzing for luminol-H 2 O 2 system. A CL platform is developed for the detection of miRNA-21 using PtCuCo-TAs as nanozyme catalyzer. In the CL detection platform, H1 (Hairpin DNA1) is immobilized onto magnetic beads (MBs) firstly. In the presence of miRNA-21, H1 is opened. H2 (Hairpin DNA2) then hybridizes with H1. Meanwhile, a “cleat” in the end of miRNA-21 with a fewer bases complementary is formed to prevent miRNA-21 dissociating from H1. This miRNA-21 hybridizes to another H1. When cpDNA-PtCuCo-TAs which consisted with cDNA (Complementary strand of probe DNA) and pDNA-PtCuCo-TAs (PtCuCo-TAs labeled with probe DNA) are added, the ssDNA region of H1 reacts with the toehold domain of probe DNA and cDNA is released resulting pDNA-PtCuCo-TAs being captured. With this process repeatedly, a lot of pDNA-PtCuCo-TAs are captured onto MBs. After separation and washing, the precipitate and H 2 O 2 are put into the 96-well and luminol solution is injected. The CL signal is produced by PtCuCo-TAs catalyzing luminol-H 2 O 2 system. The amount of miRNA-21 is detected with CL signal. This CL platform performs with limit of detection 0.167 fM and has good selectivity over other RNA.
研究领域:
生物化学
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分析化学
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分子生物学
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产品关联
DOI
PubMed
高影响因子
BIOELECTROCHEMISTRY
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2018
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IF 3.789
Baoping Lu,Xuna Yuan,Yuehong Ren,Qinghua Shi,Song Wang,Jinlong Dong,Ze-dong Nan
We describe a facile method to synthesize a new type of catalyst by electrodepositing Ag nanocrystals (AgNCs) on the different polymer dyes, Poly (methylene blue) (PMB) or Poly (4-(2-Pyridylazo)-Resorcinol) (PAR) modified graphene‑carbon spheres (GS) hybrids. The self-assembled GS take dual advantages of carbon spheres and graphene. Carbon spheres acts as nano-spacers prevent the aggregation of graphene and guarantee the fast electron transfer of GS. Secondly, polymerized dyes used here are beneficial for AgNCs growing as a linker. The effects of dyes on the growth habits, morphologies and catalytic properties for AgNCs were investigated. A novel electrochemical nonenzymatic sensor for hydrogen peroxide (H 2 O 2 ) detection is fabricated based on the Ag/Polymer dyes/GS ternary composites modified glass carbon electrode (GCE) for the first time. It was found that the proposed electrodes, especially for Ag/PMB/GS/GCE, displayed a peculiar electrocatalytic activity towards H 2 O 2 reduction synergistically as compared to Ag/PAR/GS/GCE or Ag/GS/GCE alone. Ag/PMB/GS/GCE showed a linear response over the H 2 O 2 concentration range of 0.5 to 1112 μM. The detection limit and sensitivity is 0.15 μM and 400 μA mM −1 cm −2 , respectively. These outstanding results enable the practical application of Ag/PMB/GS/GCE for the H 2 O 2 tracking released from MCF-7 (human breast cancer cells) with satisfactory results.
研究领域:
材料科学
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纳米技术
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分析化学
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生物传感器
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生物医学工程
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产品关联
DOI
PubMed
高影响因子
WATER RESEARCH
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2018
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IF 7.051
Chao Shan,Jiajia Chen,Zhe Yang,Huichao Jia,Xiaohong Guan,Weiming Zhang,Bingcai Pan
Although the removal of Se(VI) from water by using zero-valent iron (ZVI) is a promising method, passivation of ZVI severely inhibits its performance. To overcome such issue, we proposed an efficient technique to enhance Se(VI) removal via pre-corrosion of ZVI with H 2 O 2 /HCl in a short time (15 min). The resultant pcZVI suspension was weakly acidic (pH 4.56) and contained abundant aqueous Fe 2+ . 57 Fe Mössbauer spectroscopy showed that pcZVI mainly consisted of Fe 0 (66.2%), hydrated ferric oxide (26.3%), and Fe 3 O 4 (7.5%). Efficient removal of Se(VI) from sulfate-rich solution was achieved by pcZVI compared with ZVI (in the absence and presence of H 2 O 2 ) and acid-pretreated ZVI. Moreover, the efficient removal of Se(VI) by pcZVI sustained over a broad pH range (3–9) due to its strong buffering power. The presence of chloride, carbonate, nitrate, and common cations (Na + , K + , Ca 2+ , and Mg 2+ ) posed negligible influence on the removal of Se(VI) by pcZVI, while the inhibitory effect induced by sulfate, silicate, and phosphate indicated the significance of Se(VI) adsorption as a prerequisite step for its removal. The consumption of aqueous Fe 2+ was associated with Se(VI) removal, and X-ray absorption near edge structure revealed that the main pathway for Se(VI) removal by pcZVI was a stepwise reduction of Se(VI) to Se(IV) and then Se 0 as the dominant final state (78.2%). Moreover, higher electron selectivity of pcZVI was attributed to the enhanced enrichment of Se oxyanions prior to their reduction.
研究领域:
环境科学
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化学工程
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DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）