CARBON
·
2019
·
IF 7.466
Wei Miao,Ying Liu,Xiaoyan Chen,Yixin Zhao,Shun Mao
In recent years, design high catalytic graphitic carbon nitride (g–C 3 N 4 )–based catalysts has drawn broad attention in environmental remediation. In this work, a series of iron-doped g-C 3 N 4 compounds were synthesized through a simple bottom-up strategy. By controlled pyrolysis , iron-doped g-C 3 N 4 materials split from bulk structure into multi-layer structure with uniformly dispersed mesopores. The catalytic activities of layered iron-doped g-C 3 N 4 in Fenton-like and photo-Fenton-like processes were investigated. Due to the doped iron, unique layered structure, and mesopore feature, the catalysts present greatly enhanced performance in heterogeneous Fenton-like reactions. Moreover, the degradation parameters calculated by the pseudo-first-order kinetic model fitted well with the specific surface area of the catalyst, indicating that the catalytic activities rely heavily on the specific surface area of layered and porous g-C 3 N 4 . This study presents a facile and generic method to regulate C 3 N 4 morphology and structure for enhanced catalytic activity in Fenton-like reactions.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF CATALYSIS
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2018
·
IF 3.525
Shafaq Sahar,Akif Zeb,Yanan Liu,Naseeb Ullah,Anwu Xu
We prepared the Fe 3 O 4 /g-C 3 N 4 nanoparticles (NPs) through a simple electrostatic self-assembly method with a 3:97 weight ratio to investigate their Fenton , photo-Fenton and oxidative functionalities besides photocatalytic functionality. We observed an improvement of the Fenton and photo-Fenton activities of the Fe 3 O 4 /g-C 3 N 4 nanocomposites . This improvement was attributed to efficient charge transfer between Fe 3 O 4 and g-C 3 N 4 at the heterojunctions, inhibition of electron-hole recombination, a high surface area, and stabilization of Fe 3 O 4 against leaching by the hydrophobic g-C 3 N 4 . The obtained NPs showed a higher degradation potential for rhodamine B (RhB) dye than those of Fe 3 O 4 and g-C 3 N 4 . As compared to photocatalysis , the efficiency of RhB degradation in the Fenton and photo-Fenton reactions was increased by 20% and 90%, respectively. Additionally, the horseradish peroxidase (HRP) activity of the prepared nanomaterials was studied with 3,3,5,5-tetramethylbenzidinedihydrochloride (TMB) as a substrate. Dopamine oxidation was also examined. Results indicate that Fe 3 O 4 /g–C 3 N 4 nanocomposites offers more efficient degradation of RhB dye in a photo-Fenton system compared with regular photocatalytic degradation, which requires a long time. Our study also confirmed that Fe 3 O 4 /g-C 3 N 4 nanocomposites can be used as a potential material for mimicking HRP owing to its high affinity for TMB. These findings suggest good potential for applications in biosensing and as a catalyst in oxidation reactions.
研究领域:
环境科学
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材料科学
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生物化学
✓ 已验证
产品关联
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
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2020
·
IF 6.551
Yifan Huang,Minling Gao,Yingxuan Deng,Zulqarnain Haider Khan,Xuewei Liu,Zhengguo Song,Weiwen Qiu
The by-product of the traditional Fenton reaction , colloidal arsenic-‑iron oxide, is migratable and may cause secondary environmental pollution . This paper reported a new strategy involving oxidizing and immobilizing inorganic arsenic using the Fenton reaction, and avoiding the risk of secondary contamination. Lab synthesized ferrihydrite-loaded biochar (FhBC) was developed for oxidizing and binding As(III) and As(V) in aqueous solution. Batch experiments and a series of spectrum analysis (e.g., X-ray photoelectron spectroscopy [XPS], electron paramagnetic resonance [EPR], and Fourier transform infrared spectroscopy [FTIR]) were conducted to study the oxidizing or adsorption capacity and mechanism. The maximum adsorption capacity of FhBC for As(III) and As(V) is 1.315 and 1.325 mmol/g, respectively. In addition, FhBC has an efficient oxidizing capacity within a wide pH range, which is because biochar promotes the Fenton reaction by acting as an electron donator, electron shuttler, or by providing persistent free radicals. Moreover, the adsorption mechanism was studied by FTIR spectroscopy, XPS, and X-ray diffraction (XRD). The formation of internal spherical complexes and iron oxides with a higher degree of crystallization was observed, which indicate that the products of adsorption are stable and robust in a complex environment and can exist in a highly crystallized form after adsorbing arsenic ions. Therefore, the use of FhBC as an adsorbent for arsenic represents a new strategy of using the Fenton reaction while reducing secondary contamination. These results may contribute to further mechanistic studies or extensive practical applications of FhBC.
研究领域:
环境科学
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化学
✓ 已验证
DOI
PubMed
高影响因子
Analytical Methods
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2014
·Vol. 6
·期 19
·7973-7977
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IF 1.938
Yingfeng Qin,Liangliang Zhang,Gaojie Ye,Shulin Zhao
A homogeneous label-free colorimetric sensing strategy for bleomycin (BLM) assay was developed on the basis of BLM enhanced Fe(II)–H2O2–ABTS reaction. Fe(II) exhibits a catalytic effect on H2O2-mediated oxidation of ABTS by Fenton chemistry. BLM·Fe(II) complex possessed a significantly higher catalytic ability than Fe(II) probably because of the further formation of more active “activated oxo-iron-bleomycin complex”. The present method was convenient without any complicated chemical synthesis, modification, or tedious experimental procedures. Analysis results can be seen with the naked eye and monitored by UV-vis spectra. The peak absorbance exhibits a linear relationship with BLM concentrations from 25 nM to 1 μM, and a detection limit of 16 nM can be achieved. The designed colorimetric strategy may provide a promising alternative for BLM detection in clinical samples.
研究领域:
分析化学
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生物医学
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临床检验
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2024
·
IF 4.1
Xiaolin Bi,Nan Zhao,Meina Guo,Weihua Zhang,Fengping Zhou,Wuming Xie,Ruigang Wang
Roxarsone (ROX), a livestock growth enhancer, poses environmental and health hazards due to its remarkable stability, making traditional degradation methods ineffective. To tackle this issue, a novel Fenton-like composite, composed of nanoscale zero-valent iron supported on γ-aluminum oxide (nZVI/γ-Al 2 O 3 ), was synthesized to boost ROX degradation. Results demonstrated nearly complete mineralization of the ROX organic matrix within just 180 min, facilitated by the Lewis acidity sites of γ-Al 2 O 3 . Significantly, this composite exhibited selective adsorption of released AsO 4 3− ions on its surface, forming FeAsO 4 and Fe-As-Al complexes. It also established an internal redox cycle involving Fe(0), Fe(II), and Fe(III), ensuring a continuous and efficient generation of primary reactive oxygen species (·OH and O 2 ·− ). Thus, a simultaneous redox process occurred on the composite surface can be attributed to the synergy of the reducibility of nZVI and the oxidation catalyzed by ·OH and O 2 ·− . Initially, the nitro group of ROX was reduced by nZVI, forming more hydrophilic o-aminophenol, favoring subsequent oxidation and mineralization. Simultaneously, the As-C bonds in ROX were oxidized, yielding AsO 4 3− , which was subsequently adsorbed over extended reaction times. This innovative approach offers a potential solution for treating wastewater contaminated with metalloid-organic composite pollutants, addressing the environmental and health concerns associated with ROX residues.
研究领域:
环境科学
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化学
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生物学
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL RESEARCH
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2021
·
IF 6.498
Xiaoqing Meng,Xiaomeng Wang,Chunmei Zhang,Su Yan,Guanyu Zheng,Lixiang Zhou
Co-contamination of arsenic and polycyclic aromatic hydrocarbons (PAHs) in groundwater is frequently reported, and it is thus necessary to develop efficient techniques to tackle this problem. Here, we evaluated the feasibility of utilizing schwertmannite to co-adsorb As(III) and phenanthrene from water solution and regenerating spent schwertmannite via a heterogeneous Fenton-like reaction to degrade adsorbed phenanthrene and meanwhile oxidize adsorbed As(III). The results suggested that schwertmannite with a hedgehog-like morphology was superior to that with a smooth surface for the adsorption removal of As(III) or phenanthrene because of the much higher BET surface area and hydroxyl proportion of the former one, and schwertmannite formed at 72 h incubation effectively co-adsorbed As(III) and phenanthrene from water solution. The adsorption of As(III) and phenanthrene on schwertmannite did not interfere with each other, while the acidic initial solution pH delayed the adsorption of As(III) on schwertmannite but enhanced the adsorption capacity for phenanthrene. The adsorption of As(III) on schwertmannite mainly involved its exchange with SO 4 2− (outer-sphere or inner-sphere) and its complexation with iron hydroxyl surface groups, and phenanthrene adsorption mainly occurred through cation-π bonding and OH-π interaction. During the adsorption-regeneration processes, schwertmannite adsorbed As(III) and phenanthrene firstly, and then it can be successfully regenerated via Fenton-like reaction catalyzed by itself to effectively degrade the adsorbed phenanthrene and meanwhile oxidize the adsorbed As(III) to As(V). Therefore, schwertmanite is an outstanding environmental adsorbent to decontaminate As(III) and phenanthrene co-existing in groundwater.
研究领域:
环境科学
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化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2017
·Vol. 24
·期 21
·17598-17605
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IF 2.741
Wang Na,Jia Daqing,Jin Yaoyao,Sun Sheng-Peng,Ke Qiang
The present study investigated the degradation of trichloroethylene (TCE) in sand suspensions by Fenton-like reaction with magnetite (Fe 3 O 4 ) in the presence of various chelators at circumneutral pH. The results showed that ethylenediaminetetraacetic acid (EDTA) and nitrilotriacetic acid (NTA) greatly improved the rate of TCE degradation, while [S,S]-ethylenediaminedisuccinic acid (s,s-EDDS), malonate, citrate, and phytic acid (IP6) have minimal effects on TCE degradation. Quenching tests suggested that TCE was mainly degraded by hydroxyl radical (HO · ) attack, with about 90% inhibition on TCE degradation by the addition of HO · scavenger 2-propanol. The presence of 0.1–0.5% Fe 3 O 4 /sand ( w / w ) contributed to 40% increase in TCE degradation rates. In particular, the use of chelators can avoid high concentrations of H 2 O 2 required for the Fenton-like reaction with Fe 3 O 4 , and moreover improve the stoichiometric efficiencies of TCE degradation to H 2 O 2 consumption. The suitable concentrations of chelators (EDTA and NTA) and H 2 O 2 were suggested to be 0.5 and 20 mM, respectively. Under the given conditions, degradation rate constants of TCE were obtained at 0.360 h −1 with EDTA and 0.526 h −1 with NTA, respectively. Enhanced degradation of TCE and decreased usage of H 2 O 2 in this investigation suggested that Fenton-like reaction of Fe 3 O 4 together with NTA (or EDTA) may be a promising process for remediation of TCE-contaminated groundwater.
研究领域:
环境科学
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Catalysts
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2023
·Vol. 13
·期 11
·1407
·
IF 3.9
Wei Chen,Mei Zeng,Junjiao Yang
In the heterogeneous Fenton reaction, a solid catalyst reacts with H2O2to generate highly oxidizing free radicals, that degrade organic pollutants in aqueous solutions. In this study, impregnation calcination was used to modify activated carbon and load it with various metal compounds. The synergistic catalysis of the various metal compounds showed improved catalytic activity, and the prepared heterogeneous Fenton catalyst exhibited high catalytic activity, a wide pH range, and good stability. The concentration ratios of the Fenton catalyst impregnation solutions-were as follows: Fe3+, Cu2+, Mn2+, and Ce3+at 0.45, 0.72, 0.19, and 0.11 mol/L, respectively. The optimal sintering temperature of AC impregnation was determined through TGA/DSC, SEM, SEM-EDS, XPS, and XRD testing. At a final calcination temperature of 900 °C, the degradation efficiency of 10 ppm methylene blue reached 98.25% at pH 5 with 5 mM H2O2. After ten soaking cycles, the degradation efficiency exceeded 90%. The structure and performance of the catalysts were characterized using EPR, BET, ICP, and UV spectroscopy, demonstrating the excellent performance of the catalyst and providing an improved treatment plan for solving wastewater problems.Keywords:Fenton;catalyst;water treatment;methylene blue
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
高影响因子
ENVIRONMENTAL POLLUTION
·
2020
·
IF 6.793
Jingwei Wang,Qiao Ma,Zhaojing Zhang,Catherine Sekyerebea Diko,Yuanyuan Qu
Buckminster fullerene (C 60 ), the most representative type among fullerenes, has attracted widely attentions because of its many potential applications. The increasing application of fullerene and limited knowledge of its environmental fate are required concerns. Herein, the biotransformation of C 60 by Labrys sp. WJW was investigated. Cell numbers reached 25.76 ± 1.85 folds within 8 days using 100 mg/L C 60 as sole carbon source. The biotransformation of C 60 by Labrys sp. WJW was analyzed by various characterization methods. Raman spectra indicated that strain WJW broke the soccer ball like structure of C 60 . After 12 days, over 60% of C 60 was degraded evidenced by UV–vis spectrophotometry and liquid chromatography-mass spectrometry. The underlying biotransformation mechanism of C 60 through an extracellular Fenton-like reaction was illustrated. In this reaction, the • OH production was mediated by reduction of H 2 O 2 involving a continuous cycle of Fe(II)/Fe(III). Bacterial transformation of C 60 will provide new insights into the understanding of C 60 bioremediation process.
研究领域:
环境科学
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微生物学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2019
·Vol. 54
·期 11
·8236-8246
·
IF 3.442
Wen Yun,Zhao Yue,Guo Mingzhen,Xu Yan
Photo-Fenton reactions and the related functional nanomaterials have been widely studied for applications in wastewater treatment industry. Herein, visible-light-responsive Fe 2 O 3 nanoparticle-decorated BiVO 4 nanoplates were designed and successfully prepared through a one-pot hydrothermal route. The as-prepared Fe 2 O 3 /BiVO 4 nanocomposites exhibit excellent photo-Fenton catalytic activity toward the discoloration of methylene blue (MB) and Rhodamine B (RhB) dye molecules in the presence of H 2 O 2 . The experimental results indicate that nearly 100% of MB (100 mL, 10 mg L −1 ) and RhB (100 mL, 5 mg L −1 ) dye molecules are degraded in the presence of 1 g L −1 Fe 2 O 3 /BiVO 4 -1 (FB-1) photo-Fenton catalyst and 0.5 mL of H 2 O 2 within 20 min. The Fe 2 O 3 /BiVO 4 Fenton photocatalyst also demonstrates high reusability under visible light irradiation with λ ≥ 420 nm. The photoinduced electrons on the conduction band of BiVO 4 nanoplates can move toward the surface of Fe 2 O 3 /BiVO 4 to accelerate the reduction of Fe 3+ ; then, the as-formed Fe 2+ ions on the surface of the catalyst greatly enhance the decomposition of H 2 O 2 to form reactive · OH species for the use in photodegradation of MB and RhB dye molecules. The synergetic effect of Fe 2 O 3 and BiVO 4 reported in this work might provide more opportunity to fabricate other novel semiconductor-based Fenton nanocomposites for contamination treatments in wastewater.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2019
·
IF 3.261
Binyang Zhang,Mengdie Chen,Dongya Li,Haiming Xu,Dongsheng Xia
FeOCl was prepared by a partial thermal decomposition method to effectively catalyze hydrogen peroxide under the visible light for the degradation of toxic organic wastewater. The combination of DRS and VB-XPS indicated that FeOCl is a narrow band gap catalyst with visible light absorption capacity (Eg =1.63 eV). The degradation rate constant of RhB in FeOCl/H 2 O 2 /Vis system is about 13.4 times that of FeOCl/H 2 O 2 system. Compared to other heterogeneous Photo-Fenton systems, the oxidant utilization efficiency in FeOCl/H 2 O 2 /Vis system is higher. In addition, FeOCl has stable Photo-Fenton activity in a wide pH range (3.0–9.0). The content of Fe(II) increased after 5 cycles reaction through the ESR and XPS characterization, which proves that the electron transfer of Fe(III)/Fe(II) was improved during the reaction. After quantitative analysis of the ·OH generated in the reaction, the formation rate of ·OH in FeOCl/H 2 O 2 /Vis system is increased about 30% compared with FeOCl/H 2 O 2 /dark system. These results indicate that visible light excites FeOCl to generate produces photogenerated electron-hole pairs, accelerating the cycle of Fe(III)/Fe(II), promoting the production rate of ·OH, and enhancing the catalytic efficiency of FeOCl.
研究领域:
环境科学
·
催化化学
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
·
IF 4.9
Huanan Guan,Yanyu Chen,Yue Xue
The self-assembly approach has successfully been used to generate Fe 3 O 4 @Pt, a material that can mimic peroxidase . The material was created by modifying the surface of Fe 3 O 4 nanoparticles (Fe 3 O 4 NPs) with -NH 2 functional groups using 3-Aminopropyltriethoxysilane (APTES), and then using the coordination between platinum ions and -NH 2 on the surface of magnetic particles to reduce platinum ions to the surface of magnetic particles under ultrasonic conditions to produce Fe 3 O 4 @Pt composite nanoparticles . The Fe 3 O 4 @Pt core-shell composite material not only has the inert metal Pt to protect Fe 3 O 4 to improve the stability of Fe 3 O 4 in the biological matrix, but also has the high catalytic activity of Fe 3 O 4 and Pt. The catalysts were characterized, and the findings revealed that they were non-homogeneous Fenton catalysts with high dispersion, uniform particle size, and a large specific surface area . Since a large number of free radicals generated during the catalysis of Fe 3 O 4 @Pt mimic enzyme can trigger the Fenton reaction, tetracycline (TC) and oxytetracycline (OTC) were chosen as target substances, and a system for the combined degradation of tetracyclines pollutants by mimic enzyme and Fenton reaction was established, and the catalytic mechanism of this system has been investigated. The findings indicate that by using a concentration of 0.25 mol/L of H 2 O 2 , a catalyst amount of 1.5 g/L, a reaction time of 50 min, and a reaction temperature of 50°C, the degradation rate of TC and OTC can exceed 97 %, following first-order degradation kinetics. Under ideal conditions, over 95 % of each tetracyclines was degraded in the simulated food processing wastewater, effectively achieving tetracyclines degradation in the actual wastewater. In addition, the reusability of the recovered Fe 3 O 4 @Pt mimetic enzyme was investigated. The findings indicated that the Fe 3 O 4 @Pt mimetic enzyme has exceptional activity, stability, and reproducibility. The combination of the Fenton reaction with the Fe 3 O 4 @Pt mimetic enzyme can expedite the degradation of tetracyclines, offering a novel approach for eliminating recalcitrant contaminants in wastewater.
研究领域:
环境科学
·
催化材料
·
生物化学
✓ 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）