APPLIED CATALYSIS B-ENVIRONMENTAL
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2025
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IF 21.1
Rui Gan,Lijuan Huang,Wenxuan Shao,Rongling Wang,Yuxuan Ye,Xuanyuan Pei,Qiang Li,Wen Liu,Yuwei Deng,Fei Pan
This study investigates microenvironment-engineered Mn-CNF catalysts with tailored active sites to boost oxidant utilization in Fenton-like water purification. The catalyst was synthesized by in situ anchoring Mn sites onto the carbon framework, improving the electrical conductivity of the carbon fibers and coordination capacity for peroxydisulfate (PDS). The Mn-CNF/PDS system achieved a high degradation rate of target pollutants via electron transfer process (ETP), with 90.2 % TCH removal after 120 hours in continuous flow operation, while maintaining Mn leaching below 0.1 ppm. Theoretical calculations revealed a stronger adsorption energy for PDS on Mn-CNF (-7.35 eV) compared to MnO (-4.35 eV) and CNF (-4.24 eV), with the lowest Gibbs free energy for complex formation. The rapid ETP demonstrated high selectivity in the presence of competing ions and natural organic matter. This work provides a novel strategy for sustained, efficient water purification through microenvironmental engineering in Fenton-like catalysts.
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
SEPARATION AND PURIFICATION TECHNOLOGY
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2022
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IF 9.136
Zhongsen Yan,Xiaolei Chen,Shulei Bao,Haiqing Chang,Hongliang Liu,Gongduan Fan,Qiankun Wang,Xianzhi Fu,Fangshu Qu,Heng Liang
Intensive energy dependence and membrane fouling are the inherent limitations of membrane distillation (MD) process for the application. Solar energy is promising sustainable energy for both alleviating the energy shortage and activating the Fenton-like reaction for various pollutants degradation. By in situ integrating Fenton-like and photothermal MD processes, the restriction of energy dependence and membrane fouling on the MD process might be effectively liberated. In this study, Co-MoS 2 /CNT was introduced to PTFE membrane modification through vacuum filtration, which simultaneously endowed the membrane with optothermal effect and Fenton-like activation abilities. The membrane was evaluated in a dye wastewater treatment under the irradiation of 1 kW/m 2 light density. Results showed that the degradation degree of RhB can reach 80 % within 1 h on the feed side, while the permeate flux maintains at 2.43 kg/(m 2 ·h) with an initial feed temperature of 35 °C. In addition, the flux of the Co-MoS 2 /CNT/PTFE membrane can be maintained above 95 % after three fouling-cleaning cycles, indicating that the modified membrane has a good self-cleaning performance. This work provides a low carbon option which improving mass transfer effect and fouling control ability for dye wastewater treatment by MD using solar energy.
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
CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Qiang Li,Tianhui Zhao,Junjie Zhu,Muyuan Ma,Guoqing Hou,Mengyuan Fang,Yu Shen,Xiaoli Zhao,Zhi Tang,Fengchang Wu
Acetaminophen (ACTP) is a widely used antipyretic and analgesic, especially after the COVID-19 pandemic, during which its extensive use led to widespread distribution in the environment. Conventional wastewater treatment methods struggle to fully degrade ACTP, posing potential risks to human health and ecosystems. Therefore, developing efficient, safe, environmentally friendly, and cost-effective techniques for ACTP degradation is imperative. Herein, ultrathin-single Ti 3 C 2 T X MXene (USM) and multilayered Ti 3 C 2 T X MXene (MLM) with nanometer thickness and micron transverse size were synthesized from the MAX via acid/salt (HCl + LiF) etching process. Time-resolved photoluminescence indicated that the average fluorescence lifetimes (τ ave ) of USM (96.870 ns) and MLM (53.839 ns) are 9.47 and 5.26 times that of MAX (10.229 ns), respectively. Both materials exhibited excellent ACTP degradation ability (∼100 %) in a photocatalytic Fenton-like reaction process under visible light within 60 min. The visible light enhanced the degradation of ACTP by accelerating the redox cycles of Ti 3+ /Ti 4+ and achieving continuous catalytic activation of H 2 O 2 to form reactive oxygen species (h + , •OH, •O 2 – , and 1 O 2 ). Among these, h + radicals were the primary contributors, with •OH, •O 2 – , and 1 O 2 also playing supportive roles in the degradation process. The ecological structure–activity relationships analysis indicated that the degradation intermediates had significantly lower toxicity than ACTP itself. This study offers valuable insights into MXene’s application in photocatalytic Fenton-like systems, paving the way for efficient pharmaceutical degradation.
研究领域:
环境科学
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材料科学
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化学工程
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产品关联
DOI
高影响因子
Current Microwave Chemistry
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2022
·Vol. 9
·期 2
·109-120
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IF 0
Cao Menghan,Tian Ke,Shi Fengyin,Zhang Guangshan
Background: In previous work, we successfully prepared CuO/Al2O3 catalysts and evaluated their catalytic activity, kinetics and degradation mechanism for Fenton-like oxidation of p-nitrophenol (PNP) under microwave irradiation. However,
we did not study the effect of important preparation parameters on the activities of catalysts. Objectives: (1) The effect of preparation conditions: CuSO4 concentration of the impregnating solution, Al2O3 to CuSO4
solution ratio, type and concentration of precipitant and calcination temperature on the physico-chemical properties and catalytic activity were studied. (2) The catalytic performance of the Fenton-like oxidation reaction of PNP under microwave irradiation was evaluated and correlated with
the characterization results. (3) The stability and catalytic mechanism of the catalysts were investigated. Methods: The CuO/Al2O3 catalyst was prepared by the impregnation deposition method. The 20 g pretreated Al2O3
particles were immersed in 0.6 mol/L Cu (NO3)2 solution and 0.4 mol/L NaOH solution for 24 h before and after. After cleaning and drying, the samples were calcined in an air muffle furnace for 4 h at a certain temperature to obtain CuO/Al2O3
catalyst. Then the catalyst was characterized and catalyzed. Results: XRD, BET and FESEM results have demonstrated that the catalyst claimed at 300 and 350°C showed a smaller size, a higher specific surface area and a better distribution of the CuO species than their counterparts prepared
at higher calcination temperatures. The CuO/Al2O3 catalyst claimed at 300 and 350°C also showed higher removal efficiencies for PNP than other catalysts prepared at higher calcination temperatures. Conclusion: It was found that the catalysts
prepared at 350°C as calcination temperature showed higher surface area, smaller CuO particle size, and uniform CuO particle size distribution, and consequently showed better catalytic activities with better stability and reusability. Moreover, the XPS results of the catalysts showed a
decrease in the Isat/Ip ratio after microwave enhanced Fenton- like reaction, confirming that CuO species has been reduced to Cu2O to some extent.
研究领域:
环境科学
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催化化学
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DOI
ELECTROCHIMICA ACTA
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2025
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IF 5.6
Juan Yang,Jiao Peng,Yi Tang,Peng Liu,Chaobai Yi,Yongqiang Shen,Liping Zheng,Xianyou Wang
The rational design of high-performance electrode materials plays a key role in the capacitive performance of supercapacitors. This study presents a novel strategy for the synergistic preparation of biomass-derived porous carbon via a mild Fenton-like reaction pretreatment combined with KOH activation. This strategy reveals the formation mechanism of porous carbon, wherein the pretreatment effectively decomposes the macromolecular structures in biomass, promoting the formation of pore structures and the significant increase of activation sites, thus improving the activation efficiency of KOH. Due to the synergistic effects of pretreatment and KOH activation, the obtained porous carbon material exhibits a remarkable specific surface area of 2801 m 2 g –1 , and the activation efficiency doubled compared to the unpretreated sample. In a 3 M KOH electrolyte, the optimized porous carbon electrode has a high specific capacitance of 349 F g −1 . Furthermore, the assembled symmetric supercapacitor retains a capacitance retention rate as high as 99 % after 70,000 charge-discharge cycles, showing exceptional long-term cycling stability. In addition, the symmetric supercapacitor assembled with the porous carbon in 1 M Na 2 SO 4 electrolyte achieves a high energy density of 26.2 Wh kg −1 , further verifying the practical application potential of the material. This study not only confirms the positive role of Fenton-like reaction pretreatment in improving the performance of biomass-based porous carbon materials, but also offers a new insight and method for developing high-performance supercapacitor electrode materials.
研究领域:
材料科学
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能源存储技术
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产品关联
DOI
高影响因子
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