JOURNAL OF MEMBRANE SCIENCE
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2025
·
IF 9
Taotao Gao,Jiating Liu,Fusheng Pan,Xingchun Li,Hongju Da,Ming Xue,Xiangyu Cui,Han Zhang,Jian Lu,Zhongyi Jiang
Volatile organic compounds (VOCs) are pollutants detrimental to human health and the environment, necessitating the development of efficient separation technologies to support sustainable societal progress. Hybrid membranes incorporating metalated covalent organic frameworks (MCOFs) have shown great potential for VOCs separation due to the synergistic combination of polymer processability and the selective adsorption capacity of MCOFs. However, the performance of conventional MCOFs is limited by their microporous structures, which restrict molecular diffusion and accessibility to metal active sites. Herein, we have designed a mesoporous Cu(I)-metalated COF (Cu 3 L 3 -BD) with a pore diameter of 3.8 nm, which was further incorporated into poly(ether-block-amide) (Pebax) matrix to fabricate hybrid membranes (Pebax-Cu 3 L 3 -BD) for VOCs separation. The mesoporous channels facilitate improved gas transport and maximize exposure of Cu(I) coordination sites, thus enhancing the dissolution-diffusion process and improving the selectivity of Pebax-Cu 3 L 3 -BD. With a filler loading of 3 wt%, the Pebax-Cu 3 L 3 -BD exhibited optimal toluene permeance of 1.67 × 10 −6 mol μm m −2 s −1 Pa −1 and selectivity of 730, with the stability maintained over 120 h.
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高影响因子
Molecular Catalysis
·
2022
·
IF 5.089
Zhengjie Li,Chen Ma,Miao Qi,Yunlong Li,Yanchao Qu,Ying Zhang,Lilong Zhou,Jimmy Yun
Nano CeO 2 (CeMOF) maintaining the primary micromorphology and pore structure of MOFs was successfully synthesized by controlled pyrolysis of UiO-66(Ce) in air. CeMOFs showed excellent activity for catalytic combustion of VOCs, including toluene, benzene and xylene. The results showed that the T 10% , T 50% and T 90% of toluene over CeMOF were 185, 198 and 206 ℃ (GHSV = 22500 h −1 , toluene concentration = 1000 ppm), respectively, which are the lowest among ever reported ceria catalysts. According to various characterization results, the high catalytic activity of CeMOF can be ascribed to its neat pore structure and high percentage of Ce with low chemical valence. The latter leads to massive surface oxygen species and oxygen vacancies which provides abundant oxidative sites for VOCs. The low-temperature reducibility and multiple weakly acidic sites also enhanced the catalytic activity. In addition, CeMOF shows good ability to resist H 2 O and thermal stability. The in-situ DRIFTs study of CeMOF shows toluene is degraded by continuous stages through quick conversion of toluene to benzaldehyde and adsorbed benzoate, and forms CO 2 and H 2 O at last.
研究领域:
材料科学
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环境科学
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2024
·Vol. 35
·期 10
·1-12
·
IF 2.8
Li Ziheng,Zhang Mingxue,Zhang Zeyu,Hao Hongshun,Yan Shuang
Two-dimensional chalcogenides have made significant advances as chemiresistive gas sensors due to their high sensing response and low power consumption. However, their inherent morphological complexity, low thermal oxidation temperature, and poor conductivity pose as major obstacles to practical application. In this study, we introduced a synthesis method in combination of hydrothermal reaction and heat treatment to fabricate SnS-based sensing materials with different forms of two-dimensional nanostructure. During preparation, SnS 2 with different morphologies were firstly synthesized via hydrothermal reaction, followed by thermal oxidation and nitrogen calcination, flower-like SnS nanostructure, and nanoflake SnS–SnO 2 composite, respectively. The samples synthesized by this method demonstrate improved crystallinity, which can overcome the obstacle of poor conductivity. In comparison, the flower-like SnS nanostructure assembled by ultra-thin nanosheets demonstrates improved gas-sensitive performance over nanoflake SnS–SnO 2 composite. At the working temperature of 200 °C, the SnS sensor shows a response value as high as 13.3- to 100-ppm ethanol. Besides, the sensor exhibits stable sensing performance and excellent recovery characteristics in response to ethanol. The preparation method proposed in this paper provides an effective approach for the development of high-performance two-dimensional chalcogenide gas sensing materials.
研究领域:
材料科学
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化学传感器
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高影响因子
CHINESE JOURNAL OF CATALYSIS
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2021
·
IF 8.271
Longfu Wei,Changlin Yu,Kai Yang,Qizhe Fan,Hongbing Ji
Currently, air pollution is being exacerbated by rapid social, economic, and industrial development. Major air pollutants include volatile organic compounds (VOCs) and CO. Photocatalytic and thermocatalytic technology can be used to convert VOCs and CO into harmless gases effectively. Recently, photothermal synergistic catalysis has aroused much attention because of its higher performance than those of individual photocatalytic and thermocatalytic processes. There have been many reviews on separate photocatalysts and thermocatalysts for the treatment of VOCs and CO, but few reviews have focused on photothermal synergistic catalysis. In this minireview, we concentrate on recent progress into photothermal synergistic catalysis for the efficient removal of VOCs and CO. The treatment of typical VOCs (such as benzene, toluene, ethanol, formaldehyde, acetone, propylene , and propane) and CO are summarized and analyzed. Furthermore, we discuss the use of conventional reactor technology, such as fixed-bed quartz reactors, for VOCs and CO removal. We also discuss the mechanism of the photothermal synergistic catalytic removal of VOCs and CO. Finally, we present perspectives for the photothermal synergistic catalytic removal of VOCs and CO.
研究领域:
环境科学
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催化化学
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高影响因子
Insects
·
2024
·Vol. 15
·期 7
·548
·
IF 2.7
Mingtao Li,Jie Liu,Shunan Chen,Jun Yao,Lei Shi,Hang Chen,Xiaoming Chen
Simple SummaryThe butterflyByasa hedistusexhibits strong volatiles but shows no significant differences in color and shape. We analyzed the volatile organic compounds (VOCs) and tested the visual and olfactory behavioral responses ofB. hedistusduring foraging and courtship. The effects of colors and VOCs on the foraging and courtship ofB. hedistusare discussed. This study enhances our understanding of how male and female butterflies of similar coloration use different signals for foraging and courtship.AbstractColor and odor are crucial cues for butterflies during foraging and courtship. While most sexual dimorphic butterflies rely more on vision, our understanding of how butterflies with similar coloration use different signals remains limited. This study investigated the visual and olfactory behavioral responses of the similarly colored butterflyByasa hedistusduring foraging and courtship. While visiting artificial flowers of different colors, we found thatB. hedistusexhibits an innate color preference, with a sequence of preferences for red, purple, and blue. The frequency of flower visits byB. hedistussignificantly increased when honey water was sprayed on the artificial flowers, but it hardly visited apetalous branches with honey water. This proves that locating nectar sources by odor alone is difficult in the absence of floral color guides. During courtship, males are active while females hardly chase; only two models were observed: males chasing males and males chasing females. The courtship process includes four behaviors: slowing approach, straight chasing, hovering, and spinning.B. hedistuscannot distinguish between sexes based on color, as there is no significant difference in color and shape between them. Twenty-three VOCs (>1%) were identified inB. hedistus, with 21 shared by both sexes, while ketones are specific to males. These VOCs are principally represented by cineole, β-pinene, and linalool. When cineole was added to butterfly mimics, many butterflies were attracted to them, but the butterflies did not seem to distinguish between males and females. This suggests that cineole may be the feature VOC for identifying conspecific groups. Adding β-pinene and linalool to mimics induced numerous butterflies to chase, hover, spin around, and attempt to mate with them. This suggests that β-pinene and linalool are crucial cues indicating the presence of females.
研究领域:
昆虫学
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行为生态学
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化学生态学
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PubMed
高影响因子
Insects
·
2023
·Vol. 14
·期 10
·809
·
IF 3
Chaoran Zhang,Penghua Bai,Jie Kang,Tian Dong,Haixia Zheng,Xianhong Zhang
Simple SummaryBruchophagus huonchiliis a serious threat to the yield and quality of the Chinese medicinal herbAstragalus membranaceusseeds. Plant volatile organic compounds (VOCs) are essential signaling substances for herbivorous insects when searching for host plants and mating partners. In this study, we collected and identified the VOCs emitted fromA. membranaceuspods and evaluated the attraction of individual and combined compounds toB. huonchili. Our results showed that specific concentrations of five VOCs (cis-β-ocimene, hexyl acetate, hexanal, decanal, and β-caryophyllene) attractB. huonchiliwasps. Moreover, our findings revealed that three formulations exhibited strong attraction toB. huonchiliin Y-tube olfactometer assays and in the field. This study suggests that a blend with specific VOCs and ratios emitted fromA. membranaceuscould be used as attractants in traps forB. huonchilimonitoring in the field.AbstractBruchophagus huonchiliis a pest that poses a serious threat to the yield and quality ofAstragalus membranaceusseeds. In this study, we employed solid-phase microextraction (SPME) and gas chromatography-mass spectrometry (GC-MS) to identify volatile organic compounds (VOCs) inA. membranaceuspods during the pod-filled period. Additionally, we utilized a Y-tube olfactometer to measure the behavioral response ofB. huonchilito different individual VOCs and specific VOC-based formulations. The most effective formulations were further evaluated for their effectiveness in attracting wasps in the field. Our findings revealed thatA. membranaceuspods emit 25 VOCs, including green leaf volatiles (GLVs) and terpenoid and aromatic compounds. Among these compounds, five were found to be most attractive toB. huonchiliat the following concentrations: 10 µg/µL cis-β-ocimene, 500 µg/µL hexyl acetate, 100 µg/µL hexanal, 1 µg/µL decanal, and 10 µg/µL β-caryophyllene, with respective response rates of 67.65%, 67.74%, 65.12%, 67.57%, and 66.67%. In addition, we evaluated 26 mixed VOC formulations, and three of them were effective at attractingB. huonchili. Furthermore, field experiments showed that one of the formulations was significantly more effective than the others, which could be used for monitoringB. huonchilipopulations.Keywords:seed wasps;Astragalus membranaceuspods;plant volatiles;attractants
研究领域:
植物科学
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昆虫学
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化学生态学
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害虫管理
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DOI
PubMed
高影响因子
Microorganisms
·
2023
·Vol. 11
·期 12
·2954
·
IF 4.5
Shufang Sun,Nawen Tang,Kun Han,Qunqing Wang,Qian Xu
Applying plant-derived fungicides is a safe and sustainable way to control wheat scab. In this study, volatile organic compounds (VOCs) of wheat cultivars with and without the resistance geneFhb1were analyzed by GC-MS, and 2-phenylethanol was screened out. The biocontrol function of 2-phenylethanol onFusarium graminearumwas evaluated in vitro and in vivo. Metabolomics analysis indicated that 2-phenylethanol altered the amino acid pathways ofF. graminearum, affecting its normal life activities. Under SEM and TEM observation, the mycelial morphology changed, and the integrity of the cell membrane was destroyed. Furthermore, 2-phenylethanol could inhibit the production of mycotoxins (DON, 3-ADON, 15-ADON) byF. graminearumand reduce grain contamination. This research provides new ideas for green prevention and control of wheat FHB in the field.Keywords:2-phenylethanol;Fusarium graminearum;volatile organic compounds (VOCs);antifungal mechanism;metabolomics
研究领域:
植物病理学
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农学
·
真菌学
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PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Jiaxin Qu,Xiaoqing Dang,Li Cao,Yongkang Kou,Hongzhou Ma,He Wang,Jing Dong
The substantial energy consumption and carbon loss associated with conventional thermal regeneration of activated carbon (AC) pose significant constraints on the advancement of deactivated AC recycling. Here, a vacuum-thermal process was applied to regenerate AC saturated with VOCs. Results showed that desorption efficiency under vacuum conditions (99 % at 200 °C) was significantly higher than that in air and nitrogen (85.2 % and 86.4 %, respectively). The adsorption capacities of different AC samples were maintained at 74.2 %, 97.8 %, 90.9 %, and 96.4 % after seven regeneration cycles, respectively. Pore structure analysis showed that vacuum-thermal regeneration caused less damage to the AC pore structure compared to the air and nitrogen. In addition, micropores were shown to be most conducive to the adsorption of VOCs, while mesopores larger than 4 nm are conducive to desorption. The larger the saturated vapor pressure of the VOCs, the larger the driving force it is subjected to, and the easier it is to desorption. Density field theory (DFT) calculations showed that the higher the binding energy between VOCs and AC surface, the more stable the adsorption system, making it more difficult to regenerate the adsorbent. This work provides insight into the development of an economical and environmentally friendly regeneration route for AC adsorption.
研究领域:
环境科学
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材料科学
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高影响因子
International Journal of Environmental Research and Public Health
·
2018
·Vol. 15
·期 7
·1520
·
IF 2.145
Zhuqiu Sun,In-Sun Kang,Qianyuan Wu,Jinying Xi,Hongying Hu
Ultraviolet (UV) photodegradation is increasingly applied to control volatile organic compounds (VOCs) due to its degradation capabilities for recalcitrant compounds. However, sometimes the UV photodegradation products are also toxic and can affect human health. Here, 10 VOCs at 150~200 ppm in air were treated using a laboratory-scale UV reactor with 185/254 nm irradiation, and the biotoxicity of their off-gas was studied by investigating their off-gas absorption solutions. The CO2increase and VOC decrease were 39~128 ppm and 0~42 ppm, respectively, indicating that the VOCs and their products were mineralized in off-gas absorption solutions. The total organic carbon (TOC) of the absorption solutions are 4~20 mg∙L−1. Luminescent bacteria andDaphnia magnawere used to detect the acute toxicity, and anumuassay was used to determine the genotoxic potential. Trichloroethylene showed a highest toxicity to luminescent bacteria, while chlorobenzene had the lowest toxicity. Water-soluble UV photodegradation products for styrene are very toxic toDaphnia magna. In theumuassay, the genotoxicities of off-gas absorption solutions of trichloroethylene, methylbenzene, ethyl acetate, butyl alcohol, and styrene were 51.26, 77.80, 86.89, 97.20, and 273.62 mg (4-NQO)·L−1respectively. In addition, the analysis of the genotoxicity/TOC and intermediates products indicated that the off-gas absorption solutions of styrene, trichloroethylene, and butyl alcohol contain many highly toxic substances.Keywords:VOCs;UV photodegradation;biotoxicity;luminescent bacteria;Daphnia magna
研究领域:
环境科学
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毒理学
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DOI
PubMed
高影响因子
Surfaces and Interfaces
·
2026
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IF 6
Qiubai Jiang,Tianle Tan,Hui Deng,Jiang Wan,Long Wang,Min Li,Yang Wang,Guangxu Liu
Solar-driven interfacial evaporation (SDIE) is a low-energy and environmentally friendly technology for clean-water production. However, when applied to complex waters, volatile organic compounds (VOCs) can readily enter the condensate. In this study, a sequential strategy involving carbonization followed by composite fabrication was used to construct a CuO@Fe 2 O 3 @CC-SA (CFCC-SA) bimetallic oxide aerogel evaporator with both mechanical stability and flexibility for efficient water evaporation and VOC degradation. Synergistic interactions between Fe and Cu enhanced both the photothermal conversion efficiency and Fenton-like catalytic activity of the material. Meanwhile, the porous aerogel network provided excellent hydrophilicity and rapid water transport, thereby promoting efficient evaporation. Under 1.0 kW m –2 irradiation, the CFCC-SA evaporator exhibited an evaporation rate of 2.06 kg·m –2 ·h –1 , corresponding to an approximately 20% increase relative to the monometallic CuO@CC-SA evaporator. For phenol, CFCC-SA achieved removal efficiencies of 98.4% in the condensate and 63.8% in the raffinate. Furthermore, CFCC-SA maintained high phenol removal performance over a broad pH range and under highly saline conditions (20 wt% NaCl). Overall, by integrating efficient water transport with synergistic bimetallic catalysis, the CFCC-SA evaporator offers a promising strategy for designing SDIE systems that simultaneously enable high-rate water evaporation and VOC removal. Download: Download high-res image (272KB) Download: Download full-size image
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高影响因子
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
·
2026
·Vol. 131
·期 17
·e2026JD047457
·
IF 3.8
Qiaodi Lu,Lei Yao,Shuwen Yan,Chuang Li,Xun Rong,Yuruo Fu,Cong An,Kaiqi Lai,Jiayi Zhou,Ning Wang,Yueyang Li,Lin Wang
Volatile organic compounds (VOCs) are receiving more attention for their potential to form ozone and secondary organic aerosol (SOA). Considerable amounts of VOCs are released from freshwater algae, and their chemical compositions and release rates have not been well understood. In this work, chemical compositions and release rates of VOCs emitted from a dominant algae species ( Microcystis aeruginosa ) in freshwater phytoplankton community were investigated under various cultivation conditions (i.e., BG11 medium, BG11 + extra nitrogen nutrient, BG11 + extra phosphorus nutrient, and low pH). 238 VOC species were identified from the emission of M. aeruginosa , among which 40 were hydrocarbons (elemental composition: CH), 81 were oxygenated-VOCs (elemental composition: CHO), 61 were nitrogen-containing VOCs (elemental composition: CHN and CHNO), 56 were sulfur-containing VOCs (elemental composition: CHS, CHSO, CHNS, CHNSO). The average release rates of hydrocarbons, oxygenated-VOCs (CHO), sulfur-VOCs (CHS and CHSO), and nitrogen-VOCs (CHN and CHNO) across all cultivation conditions were 668.6 ± 431.6, 352.0 ± 244.7, 2562.5 ± 1347.3, and 12.3 ± 5.76 ng·m −2 ·h −1 , respectively, among which, sulfur-VOCs were the dominant species. Adding NH 4 Cl or CO(NH 2 ) 2 as extra nitrogen nutrient significantly reduced total VOCs release. Hydrocarbons and nitrogen-VOCs were mainly released during the growth stage of algae, while some oxygenated species and sulfur-containing species were released during the decline phase. This study offers enhanced insight into the diversity and emission levels of VOCs produced by freshwater algae and underlying SOA and ozone formation over and around inland eutrophic lakes.
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高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2014
·
IF 4.331
Hongning Wang,Mei Tang,Ke Zhang,Daofei Cai,Weiqiu Huang,Ruoyu Chen,Chengzhong Yu
Functionalized hollow siliceous spheres (HSSs) have been prepared by surface modification with trimethylchlorosilane (TMCS) for the removal of volatile organic compounds (VOCs). The resultant HSSs-TMCS possesses a uniform and well-dispersed hollow spherical structure, high surface area, large total pore volume, high VOCs adsorption capacity, and small water vapor adsorption capacity. The adsorption and desorption performance of HSSs-TMCS under static (n-hexane and 93# gasoline) and dynamic (n-hexane) conditions was investigated. Compared with commercial silica gel (SG) and activated carbon (AC), HSSs-TMCS show higher capacity of adsorbing n-hexane and 93# gasoline with good stability and low water vapor adsorption capacity under static adsorption conditions, higher dynamic adsorption capacity and stable breakthrough time under dynamic adsorption conditions. The high efficiency and stability of functionalized HSSs are associated with their unique hollow morphology and structure parameters. The designed HSSs-TMCS with high VOCs removal capacity and recyclability are promising candidates for the treatment of air pollution.
研究领域:
材料科学
·
环境科学
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DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）