CATALYSIS LETTERS
·
2025
·Vol. 155
·期 4
·1-19
·
IF 2.4
Cheng Liu,Zhu Zhexin,Wang Gangqiang,Du Shiting
Since Peroxymonosulfate (PMS) is readily available and can produce sulfate radicals with a stronger oxidation capacity, the Fenton-like system Fe 2+ /PMS has gradually replaced Fe 2+ /H 2 O 2 system in organic pollutants degradation. However, the Fe 3+ /PMS system has almost no degradation effects, with the conversion of Fe 2+ to Fe 3+ being the rate-limiting step in the Fe 3+ /PMS system. In this paper, graphite-like phase carbon nitride (g-C 3 N 4 ) was employed to activate PMS using trace amounts of Fe 3+ for the treatment of water pollution under sunlight, and the Fe 3+ /g-C 3 N 4 /PMS system demonstrated the ability to rapidly degrade a wide range of difficult-to-degrade organic pollutants. The Fe 3+ /g-C 3 N 4 /PMS system was able to completely degrade carbamazepine (CBZ) within 30 min under sunlight. The fundings indicated that this system effectively improved the stringent limitations typically associated with Fenton process regarding the feed ratio of metal ions to oxidants, and could efficiently degrade CBZ across a broad pH range. In addition, the Fe 3+ concentration of 6.17 × 10 −6 M was used in the experiments to avoid the generation of large amounts of “iron sludge”. The trap burst experiments, DMSO oxidation experiments and electron paramagnetic resonance spectroscopy experiments indicated that O 2 · − and 1 O 2 exerted the major effectiveness in the photocatalytic degradation reaction of CBZ, and SO 4 · − and · OH jointly promoted the CBZ degradation. Graphical
研究领域:
环境科学
·
化学
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高影响因子
Desalination and Water Treatment
·
2016
·
IF 1.272
Yong-Sheng Lu,Zhan Wang,Yun-Feng Xu,Qiang Liu,Guang-Ren Qian
Iron molybdate (Fe2(MoO4)3) was used as a novel heterogeneous catalyst to activate persulfate () for rhodamine B (RhB) degradation. Results indicated 10 mg/L RhB can be completely removed under the addition of 4 mM and 0.4 g/L Fe2(MoO4)3 within 240 min. Fe2(MoO4)3 can be repeatedly used for six cycles and showed high stability with Fe leaching amounts less than 2.9% in each run. Possible catalytic mechanism was proposed as follows: RhB degradation intermediate products such as hydroxybenzene, quinone compounds and organic compound radicals acted as electron transfer agents to reduce Fe3+ to Fe2+, which reacted with persulfate to form Fe3+ creating the redox cycling of iron, the RhB and those intermediate products are oxidized directly by the molybdenum peroxo complexes which forming probably with and persulfate, and the synergy between Fe3+ and occurring the catalytic effect on the persulfate. Additionally, the major intermediates of RhB were identified according to GC/MS and the possible degradation pathway was proposed.
研究领域:
环境科学
·
化学工程
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.6
Yuhui Zuo,Jinze Li,Yan Liu,Jiamin Zhang,Wenfei Lan,Xinyi Li,Tong Li,Han Wang,Tongqing Wang,Shuyan Gao,Li Chen,Xinsheng Wang,Yusheng Niu,Yuanhong Xu
Thiol-disulfide exchange, one of the most popular dynamical combinatorial chemistries under physiological conditions, typically requires long equilibration times to reach the desired equilibrium composition. We successfully synthesized Cysteine-iron oxychloride (Cys-FeOCl) nanobelts by introducing L-cysteine as a dispersing agent during the liquid-phase exfoliation of FeOCl. This material utilizes the L-cysteine thiol group ( SH) to accelerate the Fe 3+ /Fe 2+ cycle, significantly enhancing the peroxidase-like (POD-like) activity, and constructing a coupling network of “cysteine-cystine” biochemical redox pair and “Fe 2+ -Fe 3+ chemical metal valence state cycling”, thereby continuously generating reactive oxygen species (ROS). Experimental results reveal that Cys-FeOCl exhibited 100% antibacterial efficiency against Gram-positive methicillin-resistant Staphylococcus aureus (MRSA) at 2 μg·mL −1 , and 99% antibacterial activity against Gram-negative extended-spectrum β-lactamase-producing Escherichia coli (ESBL-producing E. coli ) at 10 μg·mL −1 . The mechanism lies in the ROS burst, causing bacterial structure rupture, DNA damage and protein leakage. Interestingly, excessive addition of exogenous hydrogen peroxide (H₂O₂) will destroy the coupling cycle constructed by Cys-FeOCl, thereby weakening its bactericidal efficacy. This study confirms that cysteine, ultrasound-assisted, and FeOCl are the three essential factors for constructing the efficient nanozyme bactericidal agent Cys-FeOCl, providing a novel and powerful strategy for combating drug-resistant bacterial infections.
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PubMed
高影响因子
Journal of Energy Chemistry
·
2016
·
IF 2.322
Ran An,Guizhuan Xu,Chun Chang,Jing Bai,Shuqi Fang
Butyl levulinate (BL) is a promising new candidate as diesel fuel and fuel additive. In this study, an efficient process for a one-pot synthesis of BL from biomass-derived carbohydrates in butanol medium with the catalysis of metal sulfates was developed. The catalytic activity of a series of metal sulfates for the synthesis of BL from fructose was investigated. Among various metal sulfates, ferric sulfate Fe 2 (SO 4 ) 3 was found to be the most efficient catalyst, which gave a remarkably high BL yield of 62.8 mol% under the conditions of 463 K, 3 h, a catalyst dosage of 5.0 g/L, and fructose concentration of 25 g/L. Different carbohydrates including glucose, cellulose , inulin and sucrose were also used for one-pot synthesis of BL with the catalysis of Fe 2 (SO 4 ) 3 , showing the yields of 39.6, 30.5, 56.6 and 50.1 mol%, respectively. In addition, the recycling and reuse of Fe 2 (SO 4 ) 3 was studied by characterizing them using powder X-ray diffraction (XRD), scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS). A plausible reaction pathway for the one-pot synthesis of BL from fructose was proposed. This study provides a facile and feasible way for the synthesis of BL from biomass.
研究领域:
生物化学
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能源科学
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高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2016
·Vol. 23
·期 17
·17822-17830
·
IF 2.76
Zhang Qian,Xia Yu-Feng,Hong Jun-Ming
As widely used disinfectants, the pollution caused by benzalkonium chloride (BAC) has attracted a lot of attention in recent years. Since it is not suitable for biodegradation, BAC was degraded firstly by Fenton advanced oxidation technologies (AOTs) in this research to enhance the biodegradability of the pollutions. The result revealed that the optimal molar ratio of H 2 O 2 /Fe 2+ for BAC degradation was 10:1, and the COD removal rate was 32 %. To clarify the pathway of degradation, the technique of GC-MS was implemented herein to identify intermediates and the toxicity of those BAC intermediates were also novelty tested through microbial fuel cells (MFC). The findings indicated that ten transformation products including benzyl dimethyl amine and dodecane were formed during the H 2 O 2 /Fe 2+ processes, which means the degradation pathway of BAC was initiated both on the hydrophobic (alkyl chain) and hydrophilic (benzyl and ammonium moiety) region of the surfactant. The toxicity of BAC before and after treated by Fenton process was monitored through MFC system. The electricity generation was improved 337 % after BAC was treated by H 2 O 2 /Fe 2+ oxidation processes which indicated that the toxicity of those intermediates were much lower than BAC. The mechanism and toxicity research in this paper could provide the in-depth understanding to the pathway of BAC degradation and proved the possibility of AOTs for the pretreatment of a biodegradation process.
研究领域:
环境科学
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毒理学
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PubMed
高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
·
2021
·Vol. 36
·期 2
·e6513
·
IF 4.105
Haifeng Zhang,Cheng Cai,Tao Hu,Zhijie Zhang,Lina Dai,Huafeng Fei,Hongli Bai,Chonggang Wu,Xinghou Gong,Xuan Zheng
Understanding the interaction between metal and the support is crucial in searching of efficient and recyclable noble metal heterogeneous catalysts. Herein, we report a core-shell structured support for Pt catalyst with a magnetic Fe 3 O 4 core and a porous silica shell bearing amino groups. The prepared catalyst Fe 3 O 4 @mSiO 2 -APTES-Pt showed a high loading of Pt (7.93 wt%) as well as a high fraction of active Pt 0 species, which both contributed to the high activity toward a model hydrosilylation reaction between 1-octene and 1, 1, 1, 3, 5, 5, 5-heptamethyltrisiloxane (HMTS). X-ray photoelectron spectra (XPS) analysis revealed that the amino ligands played a dominant role in Pt loading and Fe 2+ probably facilitated the formation of low valence Pt 0 . Under the combined effect of magnetic nature of the support and proper support-metal interactions, the catalyst exhibited excellent recyclability with a recovery of 99.7% and a yield of over 90% even after eight runs of recycling. This catalyst may provide a new option in designing and preparing heterogeneous catalysts that are highly recoverable, reusable, and recyclable.
研究领域:
催化化学
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材料科学
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高影响因子
RSC Advances
·
2021
·Vol. 11
·期 52
·33149-33159
·
IF 3.361
Yu-qiong Gao,Yan-yan Rao,Han Ning,Da-qiang Yin,Nai-yun Gao
In this study, molybdenum disulfide (MoS2) was chosen as a co-catalyst to enhance the removal efficiency of phenacetin (PNT) in water by a ferrous ion-activated peroxymonosulfate (Fe2+/PMS) process. Operating parameters, such as the initial solution pH and chemical dose on PNT degradation efficiency were investigated and optimized. Under an initial pH of 3, an Fe2+ dose of 25 μM, a PMS dose of 125 μM and a MoS2 dose of 0.1 g L−1, the degradation efficiency of PNT reached 94.3%, within 15 min. The presence of common water constituents including Cl−, HCO3−, SO42− and natural organic matter (NOM) will inhibit degradation of PNT in the MoS2/Fe2+/PMS system. Radical quenching tests combined with electron paramagnetic resonance (EPR) results indicated that in addition to free radical species (˙OH, SO4˙− and O2˙−), nonradical reactive species (1O2) were also crucial for PNT degradation. The variations in the composition and crystalline structure of the MoS2 before and after the reaction were characterized by XPS and XRD. Further, the degradation pathways of PNT were proposed according to the combined results of LC/TOF/MS and DFT calculations, and primarily included hydroxylation of the aromatic ring, cleavage of the C–N bond of the acetyl-amino group, and cleavage of the C–O bond of the ethoxy group. Finally, toxicity assessment of PNT and its products was predicted using the ECOSAR program.
研究领域:
环境科学
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化学工程
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PubMed
高影响因子
ANALYTICA CHIMICA ACTA
·
2022
·
IF 6.911
Long Wu,Wei Zeng,Bing Hu,Ting Wu,Min Zhou,Weihong Xie
Since pesticide residues in food have attracted increasing concern worldwide, it is crucial to develop rapid and sensitive analytical methods to detect pesticide residues and ensure food safety. In this work, via the biotin-streptavidin (SA) recognition system, we constructed a magnetic relaxation switching (MRS) immunosensor for sensitive detection of chlorpyrifos (CPF). With a competitive immunoassay mode, H 2 O 2 and Fe 2+ were firstly optimized as the reaction substrates. Wherein, horseradish peroxidase (HRP) acted as enzyme label to catalyze H 2 O 2 and mediated the conversion of Fe 2+ /Fe 3+ . By introducing Fe 2+ /Fe 3+ interconversion as MRS signal output, CPF was detected by the immunoreaction induced variations of the transverse relaxation time (ΔT 2 ). The proposed MRS immunosensor exhibited a detection linear range from 0.01 to 1000 ng mL −1 (R 2 = 0.9916), with the limit of detection (LOD) of 6 pg mL −1 (3S/M, n = 3). As a proof-of-concept, CPF was easily detected among five different pesticides at a low concentration level (0.1 ng mL −1 ), as well as in real samples (apple, tea, and lettuce) with recoveries of 80.70–115.30%. Besides, the sensor can realize one step of “separation and detection” towards CPF with the aid of magnetic nanoparticles , which demonstrate its promising potential for pesticide residue detection in food samples and environment.
研究领域:
食品安全
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分析化学
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生物传感
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PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Chaowei Wan,Yu Yang,Jianxin Chen,Yang Wu,Zhifei Ma,Daishe Wu
Manganese sulfide (MnS) has been considered as a persulfate (PS) activator due to the presence of manganese and sulfur elements. Manganese sulfide (MnS) has been considered as a persulfate (PS) activator due to the presence of manganese and sulfur elements. However, the water solubility and hydrophobicity of MnS result in inefficient PS activation . Herein, we demonstrated that the MnS/PS system was significantly efficient for the degradation of phenol in the presence of Fe 2+ . Within the MnS/PS system, the Fe 2+ /Fe 3+ cycle could act as a station to facilitate the transfer of electrons from Mn 2+ and S 2- to PS, thereby enhancing electron transfer efficiency. As a result, the degradation efficiency of phenol reached 91.38% within 30 min in the Fe 2+ / MnS/PS system, but the MnS/PS system without Fe 2+ was only 61.63%, and the reaction rate of the former was 2.52 times that of the latter. In addition, the effects of different conditions on phenol degradation were investigated, including MnS, Fe 2+ , PS, phenol, initial solution pH, inorganic anions. Quenching experiment and electron paramagnetic resonance (EPR) confirmed that sulfate radical, hydroxyl radical and singlet oxygen were the main active substances in the degradation of phenol. This study provides a promising idea for application in the advanced treatment of groundwater and wastewater at the end of flocculation treatment with high background iron ions.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Shuhui Fan,Yanan Hu,Tan Zhang,Qiang Zhao,Jinping Li,Guang Liu
The synthesis of ammonia via electrochemical nitrogen reduction reaction (NRR) provides an attractive alternative approach to the traditional Haber-Bosch process. In this regard, a one-step hydrothermal method was adopted to synthesize a bimetallic oxide， ferric molybdate (Fe 2 (MoO 4 ) 3 ), coated with carbon black on the surface (denoted as Fe 2 (MoO 4 ) 3 /C). The carbon black coating minimizes aggregation of Fe 2 (MoO 4 ) 3 , leading to increased electrochemical active sites for NRR. Additionally, this coating improves the electrical conductivity of Fe 2 (MoO 4 ) 3 thereby accelerating electron transfer between carbon black and Fe 2 (MoO 4 ) 3 , which is beneficial to charge transfer and enlarge the electrochemical active surface areas. At a potential of −0.4 V RHE (vs. reversible hydrogen electrode , RHE), the ammonia yield achieved was up to 51.76 μg h −1 mg cat −1 , with a Faradaic efficiency of 90.63% at −0.35V RHE . Impressively, this electrocatalyst exhibited excellent cycle stability and durability.
研究领域:
化学
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环境科学
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材料科学
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高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2020
·
IF 6.155
Chongyang Yuan,Wei Chen,Zunxian Yang,Zhenguo Huang,Xuebin Yu
MgH 2 is regarded as a potential hydrolysis material for the hydrogen generation due to its high theoretical hydrogen yield, abundant source on earth and environmentally friendly hydrolysates. However, the quickly formed passive magnesium hydroxide layer on the surface of MgH 2 will hinder its further hydrolysis reaction, leading to sluggish reaction kinetics and low H 2 yield. In this paper, we explore the improvement of different anions and cations in solutions for the hydrolysis of MgH 2 . It is found that the cations in the solution promote the reaction rate of MgH 2 hydrolysis through the hydrolysate-induced growth effect, among which the fastest hydrogen yield can get 1664 mL/g within a few minutes in the Fe 2 (SO 4 ) 3 solution. As for the anions, it enables different microstructures of the Mg(OH) 2 hydrolysate which give rise to enhanced water utilization. Specially, for the mixed 0.5 M MgCl 2 + 0.05 M MgSO 4 solution, the water utilization rate attains the optimum value of 51.3 %, much higher than that of the single MgCl 2 or MgSO 4 solutions. These findings are of great significance for the application of MgH 2 hydrolysis as hydrogen generation.
研究领域:
材料科学
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化学工程
·
氢能
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高影响因子
RADIATION PHYSICS AND CHEMISTRY
·
2017
·
IF 1.315
Libing Chu,Shuting Zhuang,Jianlong Wang
The gamma radiation induced-degradation of a β-lactam antibiotic, penicillin G was investigated in aqueous solution. Special attention was paid to the effects of the organic substances such as peptone and glucose on penicillin G degradation, which can be found in the wastewater of the factories producing antibiotics. Results showed that gamma radiation was effective to degrade and deactivate penicillin G in pure water. With the initial concentrations of 0.27 mM, 1.34 mM and 2.68 mM, a complete removal of penicillin G could be achieved at the adsorbed doses of 2.5 kGy, 10 kGy and 20 kGy, respectively. Penicilloic acid from the β-lactam ring cleavage and a series of fragment compounds such as thiazolidine and penicillic acid were identified during gamma irradiation-induced degradation of penicillin G. Addition of Fe 2+ was efficient to enhance the mineralization. The TOC removal efficiency of penicillin G was 21.7% using gamma irradiation alone at 10 kGy, which increased to 56.4% with 1.0 mM Fe 2+ addition. The gamma radiation-induced degradation of penicillin G was inhibited in the presence of peptone and glucose and the inhibitive effect increased with increasing their concentrations. The rate constant, k of the pseudo first-order kinetics decreased by 74% and 64% in the presence of 1.0 g/L of peptone and glucose, respectively, and by 96% and 89% in the presence of 10 g/L of peptone and glucose, respectively. The ratio of k / k 0 was increased by 1.3 times with H 2 O 2 addition and by 3 times with Fe 2+ addition, in the presence of 10 g/L of glucose. Adding Fe 2+ was effective to improve the ionizing radiation induced degradation of penicillin G antibiotic in the glucose-containing wastewater.
研究领域:
环境科学
·
辐射化学
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药学
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高影响因子
危险品化学品经营许可证（带存储）