SEPARATION AND PURIFICATION TECHNOLOGY
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2022
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IF 9.136
Yuhang Zhang,Jin Qian,Peifang Wang,Yuxuan He,Bianhe Lu,Sijing Tang,Kailin Xu
In this study, ternary magnetic nanocomposites (SrTiO 3 /CoFe 2 O 4 /rGO, SCG) doped with cobalt ferrite and loaded with rGO were successfully synthesized, and utilized to rapidly activate PMS to degrade LVF. After evaluating the efficacy of samples with different loading loads, SCG-1 (1 % wt rGO loading) was selected for further testing due to its optimal catalytic activity (degradation efficiency reached 87.4 % in 5 min). Quench experiments and electron paramagnetic resonance (EPR) analysis showed that SO 4 − , 1 O 2 , OH were the main active substance involved in LVF degradation. Based on the redox cycle of Co and Fe ions and the platform provided by perovskite and rGO, the reaction can be carried out quickly. The vulnerable sites and possible degradation pathways of LVF were further analyzed by density functional theory (DFT) calculation and LC-MS/MS analysis, and the developmental toxicity and ecological risk of intermediate products were determined based on toxicity assessment software (T.E.S.T). This study provided a new vision for realizing rapid antibiotic degradation in water environments and provided theoretical support for the subsequent research on novel nanomaterials.
研究领域:
环境科学
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纳米技术
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水处理
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材料科学
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DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 30
·期 18
·53355-53369
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IF 5.8
Ding Chunsheng,Lei Jia,Cai Zhiyue,Gao Mengying,Zou Zhaozheng,Li Yuanfeng,Deng Jing
In this research, FeCo 2 O 4 nanomaterial was successfully synthesized by a typical sol–gel method and conducted as an effective agent for peroxymonosulfate (PMS) activation to eliminate antibiotics flurbiprofen (FLU), a strong nonsteroidal drug. FeCo 2 O 4 nanomaterial was characterized by XRD, TEM, SEM, and XPS. Various characterization results proved that FeCo 2 O 4 held stable spinel structure. The interfering factors including initial pH, PMS concentration, catalyst dosage, inorganic anions, and humic acid on FLU removal were also discussed. The conclusion was that the removal efficiency of FLU reached 98.2% within 120 min after adding FeCo 2 O 4 (0.4 g L −1 ) and PMS (3 mM). The optimal pH for FLU degradation was the initial pH of 6.5; too acidic or alkaline was not conductive to the degradation. The existence of HA and Cl − restrained the degradation of FLU, and HCO 3 − promoted the removal, while the influence of NO 3 − and SO 4 2− could not be considered. The radical scavenging experiment confirmed that • OH, O 2 •− , and SO 4 •− participated in FLU removal and SO 4 •− functioned a leading role. FeCo 2 O 4 showed high efficiency for PMS activation in pH range of 3.0 to 10.0. After the fourth cycle operation, the FLU removal rate exceeded 76.9%, and the Co leaching rate was low during the catalytic reaction. This study shows that FeCo 2 O 4 nanomaterial is an efficient and environment-friendly catalyst, which can be applied for PMS activation to remove organic pollutants in water.
研究领域:
环境科学
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化学
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材料科学
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水处理
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DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
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IF 5.2
Geng Li,Zhuoyu Cai,Kun Su,Yuxin Zhao,Ying Zhu,Jiangang Han,Yuwei Pan,Weinan Xing,Guangyu Wu
In recent years, advanced oxidation technologies employ peroxynitrite activation have exhibited exceptional effectiveness in eliminating various emerging contaminants. In this study, different calcination temperatures were used to derive Co 3 O 4 nanospheres with varying surface morphologies . This method effectively addresses the issue of high cost associated with high-performance catalyst synthesis or poor catalytic performance of low-cost catalysts. The active species like O 2 •− , •OH, SO 4 •− , 1 O 2 played significant role in TC degradation and 1 O 2 was the dominant reactive oxygen species (ROS). The study also proposed possible degradation pathways based on the 15 intermediates identified through HPLC-MS. Furthermore, the developmental toxicity of the identified intermediates was evaluated using a quantitative conformational relationship prediction method. This paper delves into the reaction mechanism of Co 3 O 4 nanospheres in the activation of PMS and examines the impact of surface morphology on their catalytic performance, providing a new approach to developing a persulfate catalyst that is cost-effective and has high catalytic performance, with a simple synthesis step.
研究领域:
环境科学
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化学工程
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材料科学
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高级氧化技术
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催化
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产品关联
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2023
·
IF 5.9
Renjie Ji,Mingya Liu,Jingyun Zhang,Zewei Hu,Hanli Zheng,Yunxi Hou,Jianfeng Liu,Shitao Yu,Shiwei Liu,Lu Li,Yue Liu
A core-shell carbon-based catalyst mZSM-5@SO 4 2- /mC-1.5N with mZSM-5 as core and SO 4 2- /mC-1.5 N as shell was prepared using phenolic resin as carbon source. The conversion of xylose was 97.4% and the furfural yield was 75.4% at 140 ℃ for 1 h when the catalyst was used to the reaction of xylose to furfural. The high activity of mZSM-5@SO 4 2- /mC-1.5 N was attributed to the core-shell structure could construct a high activity Brønsted acid-Lewis acid (BA-LA) interface, which promoted the synergistic effect of LA and BA and was conducive to the xylose-furfural cascade reaction. In additon, the combination of HNO 3 activation and H 2 SO 4 grafting method adjusted the density of -OH, -COOH and -SO 3 H on the mC surface, improved the Brønsted/Lewis (B/L) and hydrophilicity of the catalyst, and promoted the adsorption, fixation and transformation of xylose. Then, the effect -OH, -COOH and -SO 3 H in the reaction of xylose-furfural was studied by characterization analysis. Finally, the experimental results showed that mZSM-5@SO 4 2- /mC-1.5 N could reduce the activation energy of the xylose-furfural reaction, and the catalyst could maintain good stability after recycling and regeneration.
研究领域:
催化
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化学工程
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材料科学
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生物化学
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DOI
高影响因子
Materials
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2024
·Vol. 17
·期 19
·4762
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IF 3.1
Zhiyuan Song,Zainab Bibi,Sidra Chaudhary,Qinxiang Jia,Xiaoyong Li,Yang Sun
A water-soluble ternary copolymer bearing carboxyl, sulfonic, and amide functional groups was synthesized using ammonium persulfate-catalyzed free radical polymerization in water, resulting in high monomer conversion. This copolymer was then complexed with aluminum sulfate, forming an admixture containing Al(SO 4 )(OH)·5H 2 O, which was subsequently combined with silica gel. Characterization revealed that the synthesized copolymer formed a large, thin membrane that covered both the aluminum compounds and the silica gel blocks. The introduction of this complex admixture, combining the copolymer and aluminum sulfate, not only reduced the setting times of the cement paste but also enhanced the mechanical strengths of the mortar compared to using aluminum sulfate alone. The complex admixture led to the formation of katoite, metajennite, and C 3 A (tricalcium aluminate) in the mortar, demonstrating significant linking effects, whereas pure aluminum sulfate could not completely transform C 3 S within 24 h. Further addition of silica gel to the complex admixture further shortened the setting times of the paste, slightly reduced compressive strength, but improved flexural strength compared to the initial complex admixture. The silicon components appeared to fill the micropores and mesopores of the mortar, accelerating cement setting and enhancing flexural strength, while slightly decreasing compressive strength. This study contributed to the development of new cementing accelerators with improved hardening properties.
研究领域:
材料科学
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土木工程
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化学工程
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DOI
PubMed
高影响因子
Surfaces and Interfaces
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2024
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IF 5.7
Kuang He,Kaixuan Zheng,Li Wang,Kaihua Huang,Yong Wen,Yu Wang,Ning Hu,Jianwei Du,Lyumeng Ye,Lin Cheng
This study explores an innovative electrochemical strategy for the removal of the highly stable and toxic EDTA-Ni complex found in electroplating wastewater. Utilizing a cobalt-based single-atom catalyst (Co-NC) in an electro-enhanced system, we achieved significant activation of peroxydisulfate (PDS) for effective degradation of EDTA-Ni. Under optimal conditions of 40 mA current density and a pH range of 3–7, more than 97% of EDTA-Ni (1 mM) was successfully degraded within 90 min. Through detailed electrochemical experiments, we identified that atomic hydrogen (H*) played a crucial role in the indirect activation of PDS, facilitating the formation of reactive sulfate radicals (·SO4-). Computational analysis using density functional theory (DFT) confirmed that the H*-mediated reduction pathway had a notably low energy barrier (ΔGbs = 0.51 eV), making it the dominant activation mechanism. Gas chromatography-mass spectrometry (GC–MS) further revealed the primary degradation intermediates, providing insights into the breakdown process of EDTA-Ni. This research underscores the potential of Co-NC catalyst as a highly effective catalyst for treating persistent heavy metal complexes in advanced oxidation systems.
研究领域:
环境科学
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电化学
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催化
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废水处理
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DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
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2019
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IF 5.589
Lu Gan,Qiang Zhong,Aobo Geng,Linjie Wang,Chi Song,Shuguang Han,Juqing Cui,Lijie Xu
We prepared carbon nanofiber (CCNF) using cellulose as the carbon source in this study and utilized for the first time as the support to enhance the catalytic performance of the cobalt ferrite (CoFe 2 O 4 ) for peroxymonosulfate (PMS) activation. The catalytic capability of the CoFe 2 O 4 /CCNF nanocomposites activated PMS was investigated through degrading dimethyl phthalate (DMP), a classical organic pesticide pollutant, in water media. The influence factors like CCNF content, nanocomposite and PMS dosage, DMP content, and pH value on the degradation speed were systematically investigated and analyzed. Since CoFe 2 O 4 is a spinel structured molecule which is magnetically separable, the reusability of the prepared CoFe 2 O 4 /CCNF nanocomposites under multiple cycles was also tested. Besides, the degradation intermediates during the catalytic process were also analyzed and identified by liquid chromatography-mass spectrometry (LC-MS) with a possible degradation mechanism. The results indicated that the prepared nanocomposite had promising catalytic capability in degrading DMP, in which the SO 4 − radicals played the main role as the active oxidation agent. Furthermore, the CoFe 2 O 4 /CCNF nanocomposites exhibited very good stability and reusability. The present study provides a clean biochar supported catalyst which could readily enhance the PMS activation efficiency for recycled decontamination of refractory organic pollutants in water media.
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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水处理
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产品关联
DOI
PubMed
高影响因子
ChemSusChem
·
2020
·Vol. 13
·期 9
·2239-2244
·
IF 7.962
Yuwen Luo,Feipeng Zheng,Luojia Liu,Kaixiang Lei,Xuesen Hou,Gang Xu,Hui Meng,Jifu Shi,Fujun Li
Graphical Tunable operating voltage : The anion effect induces a varied redox ability of p-type organic radicals, leading to tunable operating voltage of Zn–organic radical batteries. DFT calculations reveal that the stronger interaction of the anion with the organic radical host, the higher the operating voltage of the Zn–organic radical battery. In contrast to traditional rechargeable rock-chair metal-ion batteries, dual-ion batteries (DIBs) involve redox reactions with anions rather than cations in p-type cathodes. In principle, regulating the electrochemical performance of the DIB by different anion species is highly feasible. Herein, the anion effect on the electrochemical performance of a DIB, the aqueous Zn– organic radical battery (Zn-ORB), consisting of a poly(2,2,6,6tetramethylpiperidinyloxy-4-yl vinyl ether) cathode and a Zn anode, was investigated by DFT calculations. SO 4 2− , CF 3 SO 3 − , and ClO 4 − with different molecular electrostatic potential values were selected as anion models. DFT calculations revealed that a stronger electrostatic interaction of the anion with the organic radical resulted in a higher operating voltage of the Zn-ORB, which was consistent with experimental results. These results bring new insight into the redox chemistry of p-type organic radicals with anions and will promote the development of high-power aqueous Zn-ORBs as well as inspire more investigations into the anion effect towards novel battery designs.
研究领域:
电化学
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电池技术
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材料科学
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计算化学
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2022
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IF 6.371
Dandan Du,Wenjie Chen,Congya Tian,Yiqun Li,Chen Chen,Ning Liang
A catalyst with multi-metal introduction and a hollow structure is very promising for peroxymonosulfate (PMS) activation. In this study, Ce doped hollow bimetallic sulfide carbon composite (CoCeS/C) were fabricated from three dimensional layered double hydroxides (LDHs), which was synthesized via metal-organic frameworks (MOFs) self-sacrificial template strategy. The as-synthesised composite was applied to the catalytic degradation of ofloxacin (OFX) and the result indicated that the reaction rate constant (k 2 ) of Ce doped CoCeS/C (18.539 mmol −1 ·L·min −1 ) was about 5.7 times higher than CoS/C (3.230 mmol −1 ·L·min −1 ) which was without Ce doping. Singlet oxygen ( 1 O 2 ) and SO 4 - • were verified as the dominant reactive oxygen species (ROS) responsible for OFX via quenching tests and electron paramagnetic resonance spectroscope (EPR). The catalyst kept high removal efficiency over the pH range of 3.0–11.0. In addition, the catalyst still showed good reusability after four runs, as well as strong resistance to versatile inorganic ions and background organic matters in the oxidative treatment of OFX. Finally, degradation pathways were proposed by analyzing the degradation intermediates. These results revealed that the designed CoCeS/C catalyst exhibits wide promising application prospects for the degradation of organic residues in environmental remediation.
研究领域:
环境科学
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催化
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水处理
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材料科学
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产品关联
DOI
高影响因子
CATALYSIS LETTERS
·
2025
·Vol. 155
·期 9
·1-16
·
IF 2.4
Hu Rui,Wang Haiyin,Luo Jiahui,Song Jianjun,Jia Haiyuan
Peroxymonosulfate (PMS)-based advanced oxidation processes (AOPs) have been proven to be an effective method for the removal of tetracycline in water. In this study, the Co 3 O 4 /molecular sieve catalyst synthesized by the incipient wetness impregnation method was used for PMS activation. The effect of specific surface area on the catalytic performance of Co 3 O 4 /molecular sieve catalyst was investigated and analyzed in detail by characterization techniques. In the Tetracycline hydrochloride (TCH) degradation experiment, the Co 3 O 4 /13X catalyst exhibited the highest specific surface area (490.584 m 2 /g) and provide abundant active sites, enabling 98.0% TCH degradation within 30 min under optimal conditions (1.5 g catalyst, 0.3 mM PMS, pH 8.0, 25℃), with a reaction rate constant (k obs ) of 0.0977 min -1 . In addition, the degradation mechanism of TCH was explored using electron paramagnetic resonance (EPR) spectroscopy and quenching experiments. It was confirmed that free radicals (SO 4 •− , •OH, O 2 •− ) and non-free radical species ( 1 O 2 ) generated during the reaction play a crucial role in the degradation process of TCH. In summary, the Co 3 O 4 /13X catalyst, when activating PMS, exhibits a remarkable synergistic effect on the degradation of TCH, and shows good repeatability and environmental adaptability. This study provides valuable insights into the design and optimization of catalysts for degrading antibiotic pollutants in water treatment processes. Graphical
研究领域:
环境科学
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催化
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水处理
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化学工程
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污染物降解
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产品关联
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
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2021
·
IF 7.963
LiWei Yang,YanYan Jia,YaQi Peng,Peng Zhou,Dian Yu,ChuanLiang Zhao,JiaoJie He,ChuanLang Zhan,Bo Lai
Removal of pharmaceutical and personal care products from wastewater is very important in water treatment process. Combining photocatalysis with persulfate (PS) could be a good solvent for this problem. Novel perylene diimide derivative (EHPDI) was designed and synthesized. Furthermore, self-assembled EHPDI/TiO 2 composite photocatalyst (EPT) was prepared and applied in activating persulfate (PS) under visible light to enhance the photodegradation of pollutants. The presence of the alkyl side chain 2-ethylhexyl optimizes the self-assembly process, enabling the composite material to achieve high performance under low EHPDI loading. Various methods were used to detect the physical and chemical characteristics of EPT. Carbamazepine (CBZ) was chosen to be the model pollutant to study the removal efficiency of EPT/PS system under visible light. Within 30 min, 5.0 mg/L CBZ could be almost completely degraded, and the removal ratio of TOC was 75.2% within 60 min. The SO 4 – , OH, O 2 – , 1 O 2 , and h + were proved to be involved in the removal of CBZ by EPR and quenching experiments. Then, other typical pollutants were degraded by this EPT/PS system, demonstrating this system is suitable for degrading different pollutants. Besides, the degradation paths of CBZ were proposed by HPLC/MS. Finally, the EPT showed excellent recyclability and stability.
研究领域:
环境科学
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水处理
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光催化
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材料科学
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Yuxuan He,Jin Qian,Peifang Wang,Jie Wu,Bianhe Lu,Sijing Tang,Pan Gao
The nanocomposite of MoS 2 embedded manganese ferrite doped perovskite (SrCoO 3 /MnFe 2 O 4 /MoS 2 , abbreviated as SMM) was successfully synthesized for peroxymonosulfate (PMS) activation under visible-light. It was optimized that the SMM-3 (mass ratio of MoS 2 modified nanocomposite was 0.3) exhibited excellent catalytic performance to activate PMS for levofloxacin (LVF) degradation, with the degradation efficiency of 95.1% in 20 min. Besides, SMM-3 was able to efficiently degrade LVF under real water matrix. The quenching experiments and electron paramagnetic resonance (EPR) analysis revealed that SO 4 •- and HO • played a dominant role in reaction. Due to the photocatalytic property of nanocomposites, the visible light could excite electrons to react with oxygen and form O 2 •- , which further reacted with HO • to produce 1 O 2 . In the reaction process, the rapid redox cycle of metal ions (including Co, Mn, Fe and Mo) boosted the activation of PMS and promoted the degradation of LVF in a short time. The Density functional theory (DFT) calculation and LC-MS/MS further revealed that oxidation of piperazine ring, decarboxylation and defluorination processes were the main LVF degradation pathways. Finally, the toxicity analysis based on Toxicity Estimation Software Tool (T.E.S.T) verified the ecological risks of transformation residues.
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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光化学
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催化
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）