Nanomaterials
·
2020
·Vol. 10
·期 10
·2025
·
IF 4.324
Ting-Ting Li,Yujia Fan,Xixi Cen,Yi Wang,Bing-Chiuan Shiu,Hai-Tao Ren,Hao-Kai Peng,Qian Jiang,Ching-Wen Lou,Jia-Horng Lin
Particulate matter 2.5 (PM2.5) has become a public hazard to people’s lives and health. Traditional melt-blown membranes cannot filter dangerous particles due to their limited diameter, and ultra-fine electrospinning fibers are vulnerable to external forces. Therefore, creating highly efficient air filters by using an innovative technique and structure has become necessary. In this study, a combination of polypropylene (PP) melt-blown and polyvinyl alcohol (PVA)/zeolite imidazole frameworks-8 (ZIF-8) electrospinning technique is employed to construct a PP/PVA/ZIF-8 membrane with a hierarchical fibrous structure. The synergistic effect of hierarchical fibrous structure and ZIF-8 effectively captures PM2.5. The PP/PVA composite membrane loaded with 2.5% loading ZIF-8 has an average filtration efficacy reaching as high as 96.5% for PM2.5and quality factor (Qf) of 0.099 Pa−1. The resultant membrane resists 33.34 N tensile strength and has a low pressure drop, excellent filtration efficiency, and mechanical strength. This work presents a facile preparation method that is suitable for mass production and the application of membranes to be used as air filters for highly efficient filtration of PM2.5.Keywords:PM2.5;zeolite imidazole framework-8 (ZIF-8), melt-blown;electrospinning
研究领域:
材料科学
·
环境科学
·
空气过滤技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF POLYMER ENGINEERING
·
2020
·Vol. 40
·期 6
·487-493
·
IF 1.126
Chen Wang,Kun Yan,Jun Wang,Siyu Chen,Jiaming Cui,Rui Zhang
In this research, we successfully fabricated a novel closed pore polyacrylonitrile (PAN)/polyvinyl pyrrolidone (PVP) composite nanofibrous membrane (PCNM) on the substrate of a commercial polypropylene window mesh. First, smooth and uniform PAN/PVP composite nanofibers (PCNs) were manufactured by blending PAN and PVP with a mass ratio of 5:5 during electrospinning. Subsequently, the prepared PCNs were hot pressed in a vacuum drying oven at a given temperature of 90°C. The morphology and filter efficiency of PCN and PCNM were investigated. It was found that hot-pressing treatment significantly affected the pore structure and orientation of PCNM, which contributed to its closed pore structure and good alignment. The filter efficiency results indicated that the hot-pressed PCNMs have excellent removal efficiency of up to 96.8% of fine particulate matter. This research demonstrates that PCNMs have potential as filters for indoor dust removal and will provide a new idea for the development of air filters.
研究领域:
材料科学
·
环境工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Building Simulation
·
2020
·Vol. 13
·期 4
·873-886
·
IF 2.472
Xia Tongling,Bian Ye,Shi Shanshan,Zhang Li,Chen Chun
When the outdoor PM 2.5 pollution is severe, if the windows are open, the occupants tend to be exposed to higher indoor PM 2.5 of outdoor origin. However, if the windows are closed, the ventilation rate tends to be insufficient for removing air pollutants generated indoors. Opening windows with the use of nanofiber window screens can be an alternative strategy that can balance between indoor PM 2.5 of outdoor origin and ventilation rate. This study fabricated a number of nanofiber window screens and conducted a series of experiments in a laboratory setup to measure the PM 2.5 removal efficiency and pressure drop with different window opening angles. A simple model was then developed for predicting the pressure drop, and the measured data was used to validate the model. Finally, the measured data and the validated model were used for two application cases. In the natural ventilation case, the use of nanofiber window screens can effectively reduce indoor PM 2.5 of outdoor origin, and the ventilation rate can be improved when compared with infiltration in the house. However, the nanofiber window screens could not reduce the PM 2.5 level in the kitchen with a range hood when the cooking PM 2.5 emission rate was high.
研究领域:
环境科学
·
公共卫生
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2021
·Vol. 29
·期 17
·24612-24622
·
IF 4.223
Li Zhansheng,Zhao Hongxia,Li Xintong,Bekele Tadiyose Girma
Environmentally persistent free radicals (EPFRs) are an emerging class of environmental hazardous contaminants that extensively, stably exist in airborne particulate matter and pose harmful effects on human health. However, there was little research about the sources of EPFRs in actual atmospheric conditions. This study reported the occurrence, characteristics, and sources of EPFRs and polycyclic aromatic hydrocarbons (PAHs) in PM 2.5 collected in Dalian, China. The concentrations of PM 2.5 -bound EPFRs ranged from 1.13 × 10 13 to 8.97 × 10 15 spins/m 3 (mean value: 1.14 × 10 15 spins/m 3 ). Carbon-centered radicals and carbon-centered radicals with adjacent oxygen atoms were detected. The concentration of ∑PAHs ranged from 1.09 to 76.24 ng/m 3 , and PAHs with high molecular weight (HMW) were predominant species in PM 2.5 . Correlation of EPFRs with SO 2 , NO 2 , O 3 , and 12 kinds of PAHs indicated that both fuel (coal and biomass) combustion and photoreaction in atmosphere influenced the concentrations of EPFR. The positive matrix factorization (PMF) model results have shown that the primary sources contributed most of the EPFRs and those of secondary sources had a little proportion. Coal combustion (52.4%) was the primary contributor of EPFRs, followed by traffic emission (22.6%), industrial sources (9.6%), and secondary sources (9.2%) during the heating period, whereas industrial emission (39.2%) was the primary contributor, followed by coal combustion (38.1%), vehicular exhaust (23.5%), and secondary sources (9.6%) during the non-heating period. The finding of the present study provides an important evidence for further study on the formation mechanism of EPFRs in actual atmospheric to control the air pollution.
研究领域:
环境科学
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公共卫生
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大气化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2020
·Vol. 30
·期 14
·1910426
·
IF 16.836
Yuyao Li,Leitao Cao,Xia Yin,Yang Si,Jianyong Yu,Bin Ding
Particulate matter (PM) has taken heavy tolls on the global economy and public health, calling for air filters that can remove PM from high-temperature emission sources. However, creating desirable filter media capable of capturing polydisperse fine particles (PFPs) effectively and enduringly, while also withstanding high speed airstream, is extremely challenging. Here, a biomimetic and bottom-up strategy to prepare superelastic, strong, and thermostable nanofibrous aerogels (NFAs) as cascade filters by assembling semi-interpenetrating polymer network (semi-IPN)-based nanofibers into a gradient architecture is reported. Inspired by the robust loofah sponges originating from stiff cellulose networks, the mechanical property of NFAs is enhanced via tailoring the chain flexibility of heat-resistant semi-IPNs. Further constructing a gradient cellular architecture endows NFAs with a versatile cascade filtration behavior for capturing polydisperse fine particles. The resultant semi-IPN-based gradient NFAs exhibit temperature-invariant superelasticity, a high compressive stress (7.9 kPa) and modulus (12 kPa), high filtration efficiency (>99.97%, PM 0.3 ), low pressure drop (≈50% that of membranes), and ultrahigh dust-holding capacity (114 g m −2 ). The fabrication of this attractive material paves the way for designing next-generation air filters for industrial dust removal.
研究领域:
材料科学
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环境科学
·
仿生学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Lijian Jia,Weisheng Han,Yu Miao,Yifan Chen,Enfu Wang,Yipeng Liang,Wenbiao Zhang,Jingda Huang,Long-Hai Zou,Luming Li
Developing biomass air filter materials with efficient filtration for particulate matter 2.5 (PM2.5) and low pressure drop is a great challenge. Targeting this issue, cellulose nanofibrils (CNF) were employed as the skeleton materials mixing with bamboo activated charcoal (BAC), polyethyleneimine (PEI), and ammonium polyphosphate (APP) as the functional fillers, followed by freeze-drying and hydrophobic modification to prepare CNF/BAC based composite aerogel sheet for capture for PM2.5. The resulting aerogel sheet showed good filtration efficiency for PM2.5 (98.64 %), which benefited from the three-dimensional network structure from CNFs and PEI and electrostatic adsorption of both BAC and APP with negative charge. After reusing for 5 times, the filtration efficiency of the system could still maintain at 95.88 %. In addition, the introduced both APP and PEI made the system have excellent flame retardant through the synergistic effect of nitrogen and phosphorus. In view of excellent properties and simple preparation, this work supplies a promising way to prepare multifunctional biomass air filter.
研究领域:
材料科学
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环境科学
·
生物工程
✓ 已验证
产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2025
·
IF 12.5
Yipeng Liang,Zhupeng Zhang,Enfu Wang,Yu Miao,Kuichuan Sheng,Siqun Wang,Weimiao Lu,Wenbiao Zhang,Jingda Huang
Chitosan (CS) based sponge shows important potential applications in adsorption, filtration, sensing, etc., which often requires good deformation-recovery ability that is usually achieved under the help of silane elastomers. Herein, a simple but innovative strategy was proposed that only bamboo activated carbon (BAC) was employed as the reinforcer to construct highly elastic phosphorylated chitosan (P-CS) sponge with through-hole structure like layer-support by freeze drying. In the system, the through-hole structure like layer-support was formed by directional freezing, where BAC as the “support” was fixed onto the P-CS “layer”. When the through h-hole structure like layer-support is squeezed, the “support” could limit the bending of the “layer” and protect it to some extent. Therefore, the resulting P-CS/BAC composite sponge displays excellent elastic properties. Based on the through-hole structure, the P-CS/BAC composite sponge is well suited for PM2.5 filtration, achieving a filtration efficiency of 99.61 % and a low pressure drop of only 60 Pa. Besides, it has excellent flame retardance (LOI of 50.4 %) due to the synergistic effect of N and P of P-CS. The system could achieve highly elastic without any silane, meanwhile, its simple preparation and excellent performance endow it a great development prospect in air purification.
研究领域:
材料科学
·
环境科学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ATMOSPHERIC ENVIRONMENT
·
2020
·
IF 4.039
Xuewen Guo,Nan Zhang,Xin Hu,Yue Huang,Zhuhong Ding,Yijun Chen,Hong-zhen Lian
PM 2.5 –bound toxic elements and organic pollutants have been extensively investigated, while limited information is available for environmental persistent free radicals (EPFRs) associated with PM 2.5 , which may lead to oxidative stress in the human lung when exposed to PM 2.5 . In this study, the levels and types of PM 2.5 –bound EPFRs present in Nanjing, a mega–city in China, were analyzed. PM 2.5 –bound EPFRs were found to mainly be a mixture of carbon– and oxygen–centered radicals. The concentration of PM 2.5 –bound EPFRs ranged from 2.78 × 10 12 to 1.72 × 10 13 spins m −3 , with an average value of 7.61 × 10 12 spins m −3 . The half–life of the PM 2.5 –bound EPFRs was calculated to be an average of 83.5 days when stored at room temperature, with only weak correlations observed between EPFRs and conventional air pollutants (NO 2 , O 3 , CO and PM 2.5 )/PM 2.5 –bound transition metals (Cu, Zn, Cr, Mn, V, Cd, and Ni) and significant correlations between EPFRs and SO 2 /PM 2.5 –bound Fe. PM 2.5 –bound EPFRs can induce the formation of reactive oxygen species (ROS) in both water and a H 2 O 2 solution, which are used to simulate lung solution of a healthy person and patient, respectively. Therefore, PM 2.5 –bound EPFRs can lead to potential oxidative stress in humans. Overall, PM 2.5 –bound EPFRs show an obvious temporal variation and can pose potential health risks to humans via the induction of ROS in the lung solution.
研究领域:
环境科学
·
公共卫生
·
毒理学
✓ 已验证
产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2022
·
IF 10.723
Keyu Zhao,Changying Ren,Youwei Lu,Qijun Zhang,Qiang Wu,Siqun Wang,Chunping Dai,Wenbiao Zhang,Jingda Huang
It is still a challenge to prepare air filtration materials with high filtration efficiency and good thermal stability from renewable materials. In this study, cellulose nanofibril (CNF), poly (vinyl alcohol) (PVA), and bamboo activated charcoal (BAC) were used to build an air filtration system with double filtration by mixing and freeze-drying. The resulting CNF/PVA/BAC aerogel sheet reached a filtration efficiency of 99.69% for PM2.5 due to its double filtration from the network structure of CNF and electrostatic adsorption of BAC. The composite material also showed high thermal stability with its filtration efficiency over 95% even after exposure to 200 °C. After modification, the hydrophobic CNF/PVA/BAC filtration sheet could be reused for over 5 times by water washing whereby the filtration efficiency remained above 95%. The environmentally friendliness excellent filtration efficiency and simplistic fabrication make the aerogel sheet a potential material choice to cope with the severe air pollution today.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2021
·
IF 7.46
Qiuyan Li,Mingxia Sun,Yingying Su,Kexin Zhang,Yi Lv
Chemiluminescence (CL) was a recognized excellent analytical method for SO 3 2− . Designing a CL sensing platform not only with selectivity but also with high sensitivity is of great significance for the SO 3 2− detection in complex samples. Herein, a novel chemiluminescence resonance energy transfer (CRET) strategy was designed by doping europium (Eu) into CeO 2 NPs. On the interface of Eu/CeO 2 , SO 3 2− was oxidized to generate the high-energy intermediate SO 2 * and the energy released was absorbed by Eu/CeO 2 nanoparticles to realize CRET. The energy donor (SO 2 * generated by the reaction of Eu/CeO 2 nanoparticles and HSO 3 - ) and the receptor (Eu/CeO 2 nanoparticles) are assembled together which simplifies system and improves the energy efficiency. The CRET system with rapid response (1 s) and high sensitivity (0.007 μM) was successfully exploited for the selective detection of SO 3 2− even in PM 2.5 samples. The study provides a new clue to design simple CL sensors with high selectivity and high sensitivity.
研究领域:
分析化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2025
·
IF 11.3
Qianyu Zhang,Huimin Ma,Jun Li,Fei liu,Hongxing Jiang,Jinbo Huang,Bin Jiang,Jing You,Guanghui Dong,Qilu Li,Wanli Ma,Zhiqiang Yu,Gan Zhang
The potential of PM2.5 to cause lung cancer has been well established; however, evidence regarding which specific components are responsible remains limited. We investigated dissolved organic matter (DOM) in PM2.5 using high-resolution mass spectrometry (HRMS) and cellular DNA damage assays to elucidate molecular composition and sources of carcinogenic components. Our analysis revealed hundreds of genotoxic compounds, with condensed aromatic amines predominating in number, abundance, and contribution to overall genotoxicity. Notably, norharman, a heterocyclic aromatic amine, was identified as a key carcinogenic component. Genotoxicity analysis using a lung cell exposure model indicated that, based on the measured concentration ratio of norharman to benzo[a]pyrene in DOM, the genotoxicity of norharman was approximately 0.21 to 0.6 times that of benzo[a]pyrene. Compared to proinflammatory compounds, these carcinogenic compounds exhibited greater unsaturation, increased aromaticity, an augmented reduced state, and the presence of nitrogenous organic matter. Two-ring aromatic amines containing two nitrogen atoms were identified as key contributors to both inflammation and genotoxicity. Regional source apportionment revealed significant regional variability in condensed aromatic amines within PM2.5. While polycyclic aromatic hydrocarbons (PAHs) are significant, condensed aromatic amines also warrant consideration in PM2.5 management. Effective mitigation requires tailored prevention measures based on regional pollution profiles and health impacts.
研究领域:
环境毒理学
·
大气污染与健康
·
分子毒理学
·
环境化学
·
肺癌病因学
·
暴露组学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Sustainability
·
2023
·Vol. 15
·期 20
·14744
·
IF 3.9
Muni Li,Peng Tan,Prabhat Kumar Rai,Yu Li,Huan Meng,Tong Zhang,Zhi Zhang,Weikang Zhang
Increasing concentrations of atmospheric particulate matter (PM) can cause a serious threat to urban air quality and human health. To reduce PM pollution in urban environments, pragmatic screening and planting of tolerant tree species can be effective and sustainable ways. However, our understanding of the effects of the capture ability of PM2.5on plant tolerance, and efforts to devise explicit assessment tools for suitability analysis for urban green belt plantations, are still inadequate. In this study, six common green tree species (Pinus tabuliformis,Abies holophylla,Juniperus chinensis,Salix babylonica,Robinia pseudoacacia, andPopulus alba) from three pollution sites in Shenyang City, China, were collected in order to assess their PM2.5capture ability, biochemical characteristics, leaf microstructures, and air pollution tolerance index (APTI). The results revealed that different sites and tested plant species can significantly affect the amount of PM2.5retained by leaf surfaces. The PM2.5retention amount ofAbies holophyllawas the highest at the SFH site and 1.41–8.89 times that of other tested species (p< 0.05). Morphological plant attributes, such as leaf surface roughness (r= 0.52 **) and contact angle (r= −0.57 **), were strongly related to the PM2.5retention amount. The PM2.5retention amount per unit leaf area had the strongest and most significant negative influence on total chlorophyll content (r= −0.743 **), indicating that the accumulation of leaf PM2.5reduced the photosynthetic efficiency of the plants. Among the tested plants,Robinia pseudoacaciahad the highest APTI value and was identified as the most resilient plant at all three sites, whereasJuniperus chinensishad the lowest APTI at all study sites. However, the integration of PM2.5capture ability with APTI showedPinus tabuliformisto be the best species for the construction of urban green belts in Shenyang City.Keywords:PM2.5;leaf microstructures;air pollution tolerance index;ascorbic acid;green belt plant
研究领域:
环境科学
·
城市林业
·
空气质量管理
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）