PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2025
·
IF 7.8
Jiajia Liu,Yaodi Fu,Shimei Liu,Ping Li,Banpeng Cao,Lihong Cheng,Jingjing Liu,Yi Tang,Xiangshu Chen,Hidetoshi Kita,Lingfang Qiu,Shuwang Duo
Ion intercalation technique is an effective strategy for enhancing the separation of photogenerated electron-hole pairs in photocatalysis. In this work, a novel [Mo 7 O 24 ] 6- polyanions-intercalated porous graphitic carbon nitride (MPCN) was synthesized through straightforward calcination process, based on the simple disolution-mixing of precursors and the drying-grinding treatment of the product. By optimizing the intercalation ratio of [Mo 7 O 24 ] 6- polyanions, the resulting MPCN demonstrated not only an extended light absorption range, but also an increased number of active sites. Furthermore, O atoms in the intercalated [Mo 7 O 24 ] 6- polyanions acted as efficient electron acceptors, effectively extracting photo-induced electrons from PCN and thereby promoting photo-induced carrier separation. Driven by the local electric field, the optimized MPCN exhibited a remarkable H 2 evolution rate of 1.08 mmol/g/h, surpassing that of pristine CN and PCN by factors of 2.5 and 2.3, respectively. Additionally, MPCN also behaved superior photocatalytic activity in the degradation of RhB. This work provides a promising approach for addressing energy shortages and environmental remediation through advanced photocatalyst design.
研究领域:
材料科学
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光催化
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能量转换
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环境修复
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纳米材料
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DOI
高影响因子
Environmental Science-Nano
·
2025
·
IF 5.1
Wen Jiang,Wenhao Lao,Zhe Xu,Yiping Feng,Jiuli Ruan
This study systematically investigates the peroxymonosulfate/ferrate (Fe(VI)/PMS) system for efficient degradation of the antibiotic fosfomycin (FOS) and simultaneous phosphate removal via in situ formed ferric nanoparticles. The Fe(VI)/PMS system achieved complete FOS degradation within 10 min, with a pseudo-first-order rate constant (0.25 min-1) significantly higher than Fe(VI) alone (0.03 min-1) or Fe(VI)/peroxodisulfate (0.18 min-1). Reactive species, including SO4•-, HO•, and high-valent iron species (Fe(V)/Fe(IV), were identified as key contributors, with HO• playing a dominant role. Optimal conditions included 200 µM PMS, 100 µM Fe(VI), and pH 5.0–7.0. Natural water matrices (e.g., river water, wastewater effluent) slightly inhibited degradation, while seawater enhanced FOS degradation efficiency. Degradation pathways of FOS involve oxidation, bond cleavage, and coupling reactions, with by-products showing reduced toxicity. Notably, in situ formed ferric nanoparticles effectively removed released phosphate via co-precipitation, and post-treatment solutions exhibited negligible toxicity to E. coli. This study highlights Fe(VI)/PMS as a promising strategy for FOS remediation with simultaneous nutrient control.
研究领域:
环境科学
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水处理技术
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高级氧化工艺
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环境修复中的纳米技术
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抗生素污染控制
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高影响因子
ENVIRONMENTAL RESEARCH
·
2025
·
IF 7.7
Ziyan Feng,Yanyu Zhang,Xiaoyu Tian,Wen Lu,Qi Wang,Zhongguo Zhang,Aimin Wang
Vacuum ultraviolet (VUV) light has witnessed promising application potential in water treatment for the in situ generation of a series reactive species. Therefore, the coupling of VUV with heterogeneous Fenton systems offers the potential to enhance catalytic activity and pollutant degradation efficiency. Herein, a novel VUV/H 2 O 2 /FeOCl system, featuring VUV irradiation and FeOCl as the catalyst, was developed for acetaminophen (APAP) degradation. The as-prepared FeOCl was systematically characterized by XRD, XPS and SEM. The VUV/H 2 O 2 /FeOCl system exhibited significant superiority when compared to single systems (VUV, H 2 O 2 , FeOCl) and binary combinations (VUV/H 2 O 2 , VUV/FeOCl, H 2 O 2 /FeOCl). Specifically, the pseudo-first-order rate constant for APAP degradation in the VUV/H 2 O 2 /FeOCl process was 5.1–366.9 times higher than other processes, with corresponding mineralization rates enhanced by 7.4 %–81.1 %. Electron paramagnetic resonance (EPR) analysis and radical quenching experiments confirmed the involvement of singlet oxygen ( 1 O 2 ), holes (h + ), hydroxyl radicals ( • OH), electrons (e − ), and superoxide radicals (O 2 •- ) in the VUV/H 2 O 2 /FeOCl system. The generation of • OH was further validated via fluorescence spectroscopy, which revealed that the VUV/H 2 O 2 /FeOCl system achieved optimal H 2 O 2 activation and highest • OH accumulation. The degradation pathway of APAP was systematically proposed based on an ultra-performance liquid chromatography system coupled with triple quadrupole mass spectrometer (UPLC-QqQ-MS) analysis, and the evolution of intermediates toxicity was also investigated. Moreover, the VUV/H 2 O 2 /FeOCl system demonstrated excellent stability and reusability, enabling efficient degradation of various aquatic pollutants. This highly efficient process provides new insights into the remediation of pharmaceutical-contaminated water.
研究领域:
环境科学
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化学工程
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高级氧化技术
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水净化
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催化
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DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2025
·
IF 11.3
Yuzheng Wu,Jinyi Tan,Zifan Li,Luwen Liang,Bing Chen,Xinwen Ou,Shan Yao,Guiquan Che,Youqun Wang,Bin Han
Singlet oxygen ( 1 O 2 ) is one of the most important pivotal reactive oxygen species (ROSs) in environmental remediation; however, the selective formation of 1 O 2 in Fenton-like reactions is severely hindered by the disordered redox reactions of oxidants. Here, by microenvironment engineering of the anthraquinone site in covalent organic frameworks (COFs), we present a facile approach for the directed oxidation of peroxymonosulfate (PMS) to produce 1 O 2 efficiently and selectively. Under visible light irradiation, anthraquinone-based COFs with β -ketoenamine units (DQTp COFs) deliver efficient 1 O 2 generation with near 100 % selectivity, outperforming most reported systems, while its counterpart with imine linkage (DQTb COFs) produces mixed ROSs with much lower efficiency. Hence, the DQTp COFs/PMS photocatalytic system can selectively degrade various emerging pollutants with boosted performance. A DQTp COFs-based membrane reactor (20 × 30 × 2 cm) exerts long-lasting pollutants degradation under natural sunlight, demonstrating great application potential. Experiments and theoretical results reveal that β -ketoenamine units facilitate the separation of charge pairs, facilitate the hole aggregation, and PMS adsorption simultaneously on the adjacent anthraquinone sites. Therefore, the adsorbed PMS is oxidized to SO 5 •− intermediates, which can then dimerize to produce 1 O 2 . This work provides atomic-level insights for precisely controlling the formation of ROSs in Fenton-like reactions by site engineering of COFs.
研究领域:
环境化学
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材料科学
·
光催化
·
高级氧化技术
·
纳米材料
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Zonglin Pan,Xinyu Liu,Ruisong Xu,Xinyuan Zhou,Hang Yu,Lin Li,Yintao Yu,Chengwen Song,Tonghua Wang
Constructing high-performance catalytic membrane materials for addressing antibiotic wastewater pollution is of great significance. In this work, a Mn-doped FeOCl functionalized carbon catalytic membrane (CM-FM) was successfully fabricated by immobilizing a Mn-doped FeOCl catalyst onto a low-cost coal-based porous carbon membrane through a straightforward co-impregnation and calcination approach. A systematic investigation was conducted on the effects of key preparation parameters, including the doping ratio and precursor concentration. Results demonstrated that the CM-FM prepared with a Mn:Fe doping ratio of 1:8 and a precursor concentration of 7 wt% exhibited optimal catalytic performance. Under these conditions, the H₂O₂ decomposition efficiency reached 83.5 %, significantly higher than that of the pristine CM (14 %) and CM-FeOCl (78 %). Moreover, the removal efficiencies of tetracycline (TC) and total organic carbon (TOC) were considerably enhanced, achieving 97 % and 48.5 %, respectively. The influence of operational parameters on the catalytic degradation of TC by CM-FM was also examined, confirming its good applicability across different water matrices. Mechanistic studies revealed that Mn doping promotes the catalytic activation of H₂O₂ by the membrane, leading to increased generation of hydroxyl radicals (·OH) and singlet oxygen ( 1 O₂). Based on HPLC-MS analysis, potential TC degradation pathways during the catalytic process were proposed. Additionally, ECOSAR software was employed to evaluate changes in the toxicity of degradation products in the permeate solution after catalytic treatment, providing an assessment of the environmental impact reduction.
研究领域:
环境科学
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化学工程
·
水处理技术
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催化
·
污染控制
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产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2025
·
IF 9.8
Yuanying Chen,Tianran Lin,Shuangshuang He,Qi Jiao,Shulin Zhao,Li Hou
Malathion plays an important role in agricultural production, and the accurate detection of malathion residues is essential to ensure food safety. A novel enzyme-free sensing method was proposed by employing bimetallic magnetic nanozymes for both colorimetric quantification and multicolor semi-quantitative detection of malathion. The nanozyme exhibits peroxidase-like activity, catalyzing H 2 O 2 -mediated oxidation of 3,3′,5,5′-Tetramethylbenzidine dihydrochloride (TMB). Malathion inhibits this activity via Zr O P coordination, reducing oxidized TMB (oxTMB) generation. Under acidic conditions, oxTMB is further converted to TMB 2+ , which etches gold nanorods, inducing aspect-ratio variations accompanied by distinct multicolor changes. This method demonstrates low detection limits of 0.68 ng/mL. It does not require biological enzymes and can semi-quantify the malathion concentration through color changes. Thus, it can achieve convenient and accurate quantitative analysis without instruments, meeting on-site detection requirements. This work contributes to food safety and the development of efficient and reliable methods for malathion detection.
研究领域:
分析化学
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纳米技术
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食品安全
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环境监测
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传感器与生物传感器
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产品关联
DOI
PubMed
高影响因子
TALANTA
·
2025
·
IF 6.1
Haotian Chen,Zimo Chen,Hanbing Yao,Yujuan Zhan,Binyu Xiao,Shuangshuang Liu,Jiayi Yan,Yifu Li,Chang Shu
Dopamine (DA) is an essential biomarker implicated in the diagnosis of neurological diseases. In this work, we designed a dual-enzyme mimetic activity MIL-101(Fe) that catalyzed specific cyclization reaction between 1,3-dihydroxynaphthalene (NR) and dopamine. As the concentration of dopamine increased, the fluorescence emission of NR at 440 nm was markedly quenched, concomitant with the emergence of a new fluorophore exhibiting enhanced emission at 480 nm and increased absorbance at 462 nm. The ratiometric fluorescence/colorimetric dual-mode detection strategy provided intrinsic self-calibration to effectively mitigate signal variations. Furthermore, a linear correlation was established for ratiometric fluorescence signal across the range of 0.25–35 μM (R 2 = 0.999), and similarly for colorimetric absorbance (R 2 = 0.999). This method provided an accurate, specific, sensitive and high-throughput detection of dopamine in human serum.
研究领域:
生物传感器
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分析化学
·
纳米材料
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生物医学诊断
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环境监测
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产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL RESEARCH
·
2025
·
IF 7.7
Juncheng Zheng,Han Song,Yuankun Yang,Haidong Li,Xuemei Luo,Shu Chen
Persulfate (PDS)-based advanced oxidation processes have emerged as promising methods for antibiotic removal, but achieving high catalytic efficiency for tetracycline (TC) degradation remains difficult. The catalytic performance of FeGCB-N in PDS activation depended on Fe content and pyrolysis temperature, with defect density and intermetallic compound formation largely determined by the pyrolysis temperature. The optimized Fe 0.2 GCB-N-800 exhibited remarkable PDS activation performance for tetracycline degradation, achieving over 99% removal within 65 min under conditions of 10 mg·L -1 TC, 1 mM PDS, and pH 3. X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR), Raman spectroscopy and X-ray photoelectron spectroscopy (XPS) collectively indicate that surface oxygen-containing functional groups, defect sites, and intermetallic Fe compounds provide active sites for PDS activation by FeGCB. Electron paramagnetic resonance (EPR) and quenching results demonstrated that superoxide radicals (O 2 •- ) and sulfate radicals (SO 4 •− ) were the primary reactive species in TC degradation. Density functional theory (DFT) calculations indicate that Fe-N is the key active site for PDS activation. Based on DFT results and liquid chromatography-mass spectrometry (LC-MS) analysis, potential degradation pathways for tetracycline (TC) are proposed. ECOSAR toxicity assessment showed that the O 2 •- -mediated pathway would generate fewer toxic byproducts. This work offers an effective approach to design environment friendly catalysts from algae biomass for treating wastewater.
研究领域:
环境科学
·
材料化学
·
水处理技术
·
催化
·
废弃生物质利用
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Yong Chen,Chenming Duan,Liangxia Zhu,Yong Liu,Xiaobo Gong
Photocatalytic fuel cell (PFC) provides a promising method for environmental remediation and energy recovery. However, how to efficiently generate, extract, and utilized charge carriers is a crucial concern for PFC. A CdS@ZnO/ITO photoanode was well-designed for sulfide (S 2− ) oxidation reaction (SOR) and a nitrogen-doped graphite felt (GF-N) cathode was designed for oxygen reduction reaction (ORR). The CdS@ZnO/ITO had a layered structure where ZnO nanosheets were inserted between CdS and ITO, forming a stepwise energy level alignment at the CdS/ZnO interface. At the junction of CdS and ZnO, a robust internal electric field modulated Type-II heterojunction with an interfacial O-Zn-S bond acted as a charge transfer bridge, promoting the extraction and quick transfer of photogenerated electrons. On the other hand, GF-N possesses a pore structure and abundant N-active sites, favoring the catalysis toward the two-electron route of ORR. Benefiting from the clever design of the electrodes, a PFC system through SOR coupled with ORR was used for the purification of S 2− -rich wastewater. In the PFC, 89.0 % sulfur recovery, 10.8 mmol/L H 2 O 2 yield, and 23.0 W/m 2 P max were simultaneously achieved under simulated sunlight (light intensity: 100 mW/cm 2 ) for 4 h at an initial S 2− concentration of 500 mg/L. Furthermore, the novel PFC system exhibits a good potential for the purifying of shale gas and leather wastewater.
研究领域:
环境科学
·
材料科学
·
化学工程
·
能源化学
·
光催化
·
废水处理
·
电化学
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DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Lin Zhang,Yibing Sun,Zhichao Yang,Hongchao Li
MoO 2 has been extensively recognized as an efficient cocatalyst in Fe-based Fenton-like systems. However, current understanding has predominantly limited its functional role to that of a reducing agent. This study elucidates a previously unexplored mechanism involving surface interaction-mediated self-sustained Fe redox cycling in MoO 2 -cocatalytic Fe(III)/peroxymonosulfate (PMS) system. Experimental findings demonstrate the formation of multiple reactive species (i.e., free radicals and high-valent iron-oxo species (Fe IV =O), leading to differential degradation efficiencies for various pollutants (i.e., higher than 96.5 % for sulfamethoxazole, phenol, benzoic acid, atrazine, and carbamazepine, and 28.9 % for p -nitrobenzoic acid). Notably, the observed PMS decomposition efficiency exceeds the stoichiometric reduction capacity of MoO 2 , thereby challenging the conventional perception of its sole function as a sacrificial electron donor. Kinetic analyses further reveal that Fe(II), generated via the reduction of Fe(III) by MoO 2 , accounts for less than 27.8 % of the total PMS decomposition. Instead, the surface-adsorbed Fe(III) (Fe(III) sur ) on MoO 2 is identified as the dominant active site for PMS activation, preferentially yielding Fe IV O as the key reactive intermediate. Based on these observations, we propose that MoO 2 not only serves as a reducing agent but, more importantly, might play as a ‘solid ligand’ that regulates the reaction activity and pathway of Fe(III) with PMS. This work provides critical insights into the design of self-sustaining Fenton-like systems for wastewater treatment.
研究领域:
环境化学
·
环境工程
·
催化化学
·
水污染控制
·
材料化学
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产品关联
DOI
高影响因子
DIAMOND AND RELATED MATERIALS
·
2025
·
IF 5.1
Khanh-Huyen Nguyen,Thu-Hien Le,Thi-Duyen To,Xuan-Duc Nghiem,Dinh-Trinh Tran
MgFe 2 O 4 /rGO/WO 3 (MAG) Z -scheme visible light-driven photocatalyst was successfully synthesized with high purity. Synergic effects within MAG Z -scheme photocatalyst effectively enhanced the photocatalytic activity by a factor of 1.5–3.3. The photocatalytic performance was evaluated through the degradation of tetracycline (TC), ciprofloxacin (CIP) antibiotics, methylene blue (MB), direct blue 71 (DB-71), livestock and textile industrial wastewaters. MB and DB-71 degradation efficiency catalyzed by MAG reached 90.22 ± 2.56 % and 87.62 ± 2.26 % after 150 min, while these figures for TC and CIP were respectively 84.47 ± 2.16 % and 78.58 ± 2.36 %. The removal efficiency depended on contact time, pH value, catalyst dosage, pollutant concentration, and co-existing ions. Radical trapping tests and electron paramagnetic resonance spectroscopy analyses showed that superoxide anion radicals were mainly responsible for degrading the pollutants. The chemical oxygen demand and toxicology assessment revealed about 75 % of organic dyes and 67 % of antibiotics were mineralized while the toxicology of the by-products was negligible. The photocatalytic performance was high and stable after five repetitive cycles, with no discernible changes to the photocatalyst's surface properties. COD removal efficiency for textile and livestock wastewaters respectively reached 48.6 % and 42.9 %, lower than those for synthetic samples due to the presence of other organic compounds and co-existing ions, but met national technical regulations on the effluents of livestock and textile industry of Vietnam. The findings in this work provide a practical approach to mitigating hazardous organic dyes and antibiotics commonly found in textile and livestock wastewaters, thereby protecting public health and the environment.
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高影响因子
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
·
2025
·Vol. 122
·期 42
·e2508673122
·
IF 9.1
Guanghui Yuan,Jixuan Wang,Yingchang Cao,Zihao Jin,Fang Hao,Keyu Liu,Yang Li,Hans-Martin Schulz,Jon Gluyas,Richard N. Zare
Sedimentary basins host high-grade gold mineralization at intersections of auriferous hydrothermal fluids and hydrocarbons. However, the precise mechanism of native gold formation associated with organic matter remains poorly understood. Here, we investigate gold precipitation at oil–water interfaces through in situ thermal experiments using various combinations of oil and HAuCl4-bearing solutions. Our results reveal that gold particles form spontaneously following the extensive generation and evolution of water microdroplets at oil–water interfaces at temperatures of 140 to 400 °C. We propose that electrons (e−), released from the conversion of hydroxide ions (OH−) to hydroxyl radicals (·OH) in water microdroplets, together with H atoms (·H) formed through electron transfer involving H3O+, and spontaneously generated H2O2 from·OH recombination, drive the reduction of Au3+ to Au0. The atomic gold progressively aggregates into Au0 clusters and Au nanoparticles (AuNPs), ultimately forming micrometer-scale gold particles and wires. This precipitation process occurs within minutes at temperatures above 350 °C and within hours below 200 °C. The experimentally produced gold particles exhibit textures like those in natural ore deposits. This interfacial microdroplet–induced mechanism provides a unique perspective on native gold formation in hydrocarbon-rich geosystems. Beyond its geological significance, this mechanism offers a potentially simplified approach for gold recovery from electronic waste without the need to introduce complex adsorbents or reducing agents into the waste stream.
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高影响因子
危险品化学品经营许可证（带存储）