Advanced Sustainable Systems
·
2022
·Vol. 6
·期 12
·2200346
·
IF 6.737
Xiaohan Sun,Qianqian Yu,Zhaolin Yang,Senwei Hu,Haiyue Yang,Xin Wang,Jiazuo Zhou,Yuan Yu,Chengyu Wang,Yudong Li
The demand for improved indoor air quality has grown with improvements in the standards of living worldwide. While wood is widely used to construct furniture since it is a renewable resource and aesthetically pleasing, it is also flammable, which limits its applications. Although there have been extensive research efforts in reducing the flammability of wood products, current approaches often have adverse effects on the environment. In this work, a novel organo-inorganic coordination system is proposed to prepare a fire-retardant and smoke suppression wooden “air purifier” using a vacuum impregnation method. The “air purifier” is composed of tourmaline particles/KH550 (TPs/KH550) and delignified wood. The added TPs give the final composites capable to purify air (1000 psc cm −3 negative oxygen ions [NOIs]). Compared with pristine wood (PW), total heat release (THR), peak heat release rate (HRR), and smoke production rate (SPR) of the wooden “air purifier” are reduced by 47.88%, 11.73%, and 82.81%, respectively, highlighting that the composites have good fire-retardancy and smoke suppression performances. Life cycle assessment (LCA) results indicate the composites have minimal environmental impact (EI) in 15 categories. This green, eco-friendly wooden “air purifier” with fire-retardant and smoke suppression properties has a great potential application in furniture and buildings.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Chunxia Pang,Haijun Wang,Xiaoyan Lin
Atmospheric particulate matter (PM) pollution is a serious threat to human health, so the preparation of electret films with high efficiency and low resistance capturing particulate has attracted wide attention. Herein, a strategy for the fabrication of all-polymer hybrid electret fiber membranes by electrospinning is reported based on the ethyl cellulose (EC) and polystyrene (PS). The preparation conditions of electret fiber membrane were optimized by focusing on the effect of the mass ratio of EC/PS and the spinning time on the structure, surface potential and purification performance of fiber membrane. The result showed that the fiber membrane has a low fiber diameter of 572 ± 113 nm and porosity of 82.4%, and a better potential stability when the EC/PS mass ratio was 2.5/1 and the spinning time was 10 min. As a result of the enhanced effect of electrostatic attraction on particle capture, the EC/PS composite electret membrane could make the purification efficiency of PM2.5 reach to100% within 11 min. Moreover, the EC/PS composite electret membrane has the properties of ultra-light base weight of 1.08 g·m −2 , low air resistance of 28 Pa and long service life. Therefore, the all-polymer EC/PS electret nanofiber membranes have broad application prospects in the field of air purification .
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2019
·
IF 7.015
Xue Gao,Zhong-Kun Li,Jian Xue,Yong Qian,Li-Zhi Zhang,Jürgen Caro,Haihui Wang
Highly effective air filters are needed because of the increasing harm caused by air particulate matter pollution. Herein, two-dimensional titanium carbide Ti 3 C 2 T x MXene nanosheets with active surface-terminating groups (O, OH and F) were used to modify the polyacrylonitrile (PAN) nanofiber filters to strengthen their interaction force with PM2.5 . These forces were measured quantitatively through the force-distance curve-based AFM showing that the MXene modification of the PAN fiber induces three times larger interaction forces than before. The obtained filters show high PM2.5 removal efficiency of ∼99.7% with a low pressure drop of ∼42 Pa. Moreover, the presence of MXene nanosheets strongly inhibits the propagation of bacteria (e.g. E. coli and S. aureus ) in the filters. Such filters can significantly improve air quality, especially in public places such as hospitals.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Amjad Farooq,Haiwei Yang,Zhenhua Ding,Fan Bu,Mingming Guo,Wanlin Sun,Zongqian Wang,Mingwei Tian
In this study, we investigated the use of deep eutectic solvents (DESs) at different molar ratios and temperatures as a green and efficient approach for microfibers (MFs) extraction. Our approach entailed the utilization of Firmiana simplex bark (FSB) fibers, enabling the production of different dimensions of FSB microfibers (FSBMFs) by combining DES pretreatment and mechanical disintegration technique. The proposed practice demonstrates the simplicity and effectiveness of the method. The morphology of the prepared microfibers was studied using the Scanning electron microscopic (SEM) technique. Additionally, the results revealed that the chemical and mechanical treatments did not significantly alter the well-preserved cellulose structure of microfibers, and a crystallinity index of 56.6 % for FSB fibers and 63.8 % for FSBMFs was observed by X-ray diffraction (XRD) analysis. Furthermore, using the freeze-drying technique, FSBMFs in water solutions produced effective aerogels for air purification application. In comparison to commercial mask (CM), FSBMF aerogels' superior hierarchical cellular architectures allowed them to attain excellent filtration efficiencies of 94.48 % (PM 10 ) and 91.51 % (PM 2.5 ) as well as excellent degradation properties were analyzed. The findings show that FSBMFs can be extracted from Firmiana simplex bark, a natural cellulose-rich material, using DES for environmentally friendly aerogel preparation and applications.
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
Journal of Cleaner Production
·
2020
·
IF 7.246
Chun Pei,Ji-Hua Zhu,Feng Xing
Titanium dioxide (TiO 2 ) photocatalyst coatings on cement material surfaces of buildings or structures that require high mechanical integrity, such as tunnel walls and pedestrian roads, can directly utilize solar energy for self-cleaning surfaces and removing air pollutants in the environment. However, TiO 2 can utilize only ultraviolet (UV) light, which accounts for only 5% of sunlight. To improve photocatalytic efficiency, graphene/TiO 2 nanocomposites are prepared by a sol-gel assisted electrospray method and characterized by various instrumental analysis methods. Photocatalytic cement mortars are prepared by incorporating the as-prepared nanocomposites and commercial TiO 2 into cement mortar. The self-cleaning and air purifying properties of the cement mortars are evaluated by the discoloration of rhodamine B (RhB) and the removal of nitric oxide (NO). As desired, cement mortar coated with graphene/TiO 2 nanocomposites expresses high photocatalytic effectiveness on both RhB and NO. In addition, the regeneration of graphene/TiO 2 nanocomposite photocatalysts has also been studied. The results show that the photocatalytic activity can be effectively regenerated by UV irradiation, with good repeatability and stability. Therefore, graphene/TiO 2 -coated cement mortar is a potential candidate for effective building self-cleaning and air purification through the use of solar irradiation .
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2022
·
IF 6.14
Zhimin Hao,Juntao Wu
A complex air pollution environment requires filters to be multifunctional. Nanofibrous materials with surface-loaded metal–organic frameworks (MOF-fibers) are reasonable structures for multifunctional air filtration. These materials can not only utilize the network structure of fibers to intercept particulate matter (PM) but also retain the porous structure of the MOFs to adsorb toxic gas. Epitaxial growth methods are commonly utilized to prepare MOF-fibers but are uneconomical and time-consuming. Herein, a facile self-assembly strategy is developed to prepare zeolitic imidazolate framework-polyimide (ZIF-PI) nanofibers with an interconnected network structure and high porosity for air filtration applications. Due to their unique structure, the ZIF-PI nanofibrous membrane exhibited high PM2.5 filtration efficiency and enhanced SO2 adsorption capacity. Moreover, by exploring the morphology evolution of the ZIF-PI nanofibrous membrane, a possible “synergistic effect of hydrophobic and electrostatic force” self-assembly mechanism was demonstrated.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2022
·
IF 10.53
Xin Lu,Yingdong Chen,Wentao Yan,Kaizhen Wang,Yong Zhou,CongJie Gao
Polytetrafluoroethylene (PTFE) membranes with three-dimensional interconnected porous networks are usually used as air filters. However, they are easily contaminated by oily aerosols in air filtration, resulting in a decrease in filtration efficiency. Herein, a strategy for the preparation of amphiphobic PTFE membranes with a ring-on-string-like micro/nano structure for air purification was proposed. First, the PTFE fibers were locked by OTS polysiloxane rings to form an OTS layer with ring-on-string-like structure by spraying octadecyltrichlorosilane (OTS) solution on the membrane surface. Subsequently, fluorinated silica (F–SiO 2 ) nanoparticles were sprayed to build the micro/nano structure and the surface with low surface energy. The prepared amphiphobic membrane had high liquid repellency to water (～153°), diiodomethane (～136°) and hexadecane (～124°). Moreover, the membrane amphiphobicity exhibited a high stability, which can be ascribed to the OTS layer. The layer has a special ring-on-string-like structure and can act as an anchor to fix the nanoparticles on the membrane surface because of the strong interaction between OTS and the nanoparticles. The filtration test results showed that the amphiphobic membrane developed possessed high removal efficiency for 0.1, 0.16 and 0.2 μm particles (˃ 99.9670%). As for the anti-oil fouling ability, the amphiphobic membrane maintained a pressure drop below 3 kPa in the smoke filtration within 10 min, meaning that the membrane developed had a high anti-oil fouling ability. The developed amphiphobic PTFE membrane in this work has a promising prospect in air purification in oil environments.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2022
·Vol. 14
·期 22
·4933
·
IF 4.967
Yuezhen Hua,Wang Cui,Zekai Ji,Xin Wang,Zheng Wu,Yong Liu,Yuyao Li
Fibrous air filtration materials are highly desirable for particle removal from high-temperature emission sources. However, the existing commercial filter materials suffer from either low filtration efficiency or high pressure drop, due to the difficulty in achieving small fiber diameter and high porosity simultaneously. Herein, we report a facile strategy to fabricate mechanical robust fibrous aerogels by using dual-scale sized PAI/BMI filaments and fibers, which are derived from wet spinning and electrospinning technologies, respectively. The creativity of this design is that PAI/BMI filaments can serve as the enhancing skeleton and PAI/BMI fibers can assemble into high-porosity interconnected networks, enabling the improvement of both mechanical property and air filtration performance. The resultant dual-scale sized PAI/PBMI fibrous aerogels show a compressive stress of 8.36 MPa, a high filtration efficiency of 90.78% (particle diameter of 2.5 μm); for particle diameter over 5 μm, they have 99.99% ultra-high filtration efficiency, a low pressure drop of 20 Pa, and high QF of 0.12 Pa−1, as well as thermostable and fire-retardant properties (thermal decomposition temperature up to 342.7 °C). The successive fabrication of this material is of great significance for the govern of industrial dust.Keywords:polyamide-imide;structural construction;air filtration;binary aerogels
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
CATALYSIS LETTERS
·
2025
·Vol. 155
·期 2
·1-12
·
IF 2.4
Wang Xiuxiu,Zhao Jiawei,Zhao Chuanjun,Zhang Yexin,Mahmud Sakil,Zhang Jian
The catalytic removal of trace formaldehyde (HCHO) at ambient temperatures is crucial for improving indoor air quality, necessitating the use of monolithic catalysts over traditional powder forms for real-world applications. In this study, an aluminosilicate fiber-woven ceramic filter paper (CFP) was selected as the substrate, onto which a Mn 2 O 3 catalyst was in situ coated via a combustion method utilizing Mn(NO 3 ) 2 as the oxidant and glycine as the fuel. The resulting monolithic Mn 2 O 3 /CFP catalyst was compared to a MnO 2 /CFP catalyst, prepared by direct decomposition of Mn(NO 3 ) 2 on the same substrate. The Mn 2 O 3 /CFP catalyst exhibited superior characteristics for HCHO oxidation, including a more porous architecture, higher redox capability, and an abundance of surface-active oxygen species with enhanced mobility of surface lattice oxygen. These features enabled the Mn 2 O 3 /CFP catalyst to achieve significantly higher HCHO conversion at room temperature (90%) compared to the MnO 2 /CFP catalyst (21%). Additionally, in a durability test carried out in a mode of dynamic flow at room temperature, the Mn 2 O 3 /CFP catalyst maintained a high HCHO conversion rate of 66% over 11 days, demonstrating its potential for practical indoor air purification applications. Graphical abstract
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
BUILDING AND ENVIRONMENT
·
2020
·
IF 4.971
Ding-Chao Zhang,JunJie Liu,Cong Wang,Yong Liu,Jia-Hua Wang,Xu Han
Given that the toxic hexanal in indoor air is primarily originated from the cooking oil fumes, it is necessary to purify hexanal in the cooking oil fumes to prevent the adverse health effects of hexanal to human beings. In this study, four typical metal-organic frameworks (MOFs), namely MIL-101 (Cr), UiO-66, ZIF-8 and Cu-BDC were synthesized and applied to purify the indoor hexanal, and their adsorption capacities to hexanal were compared with the commercial activated carbon (AC). Our results show that the adsorption capacities of hexanal follow the order of MIL-101(Cr) (135 mg g −1 )> UiO-66 (64.3 mg g −1 )> ZIF-8 (40.3 mg g −1 )> AC (35.8 mg g −1 )> Cu-BDC (32.5 mg g −1 ), and the desorption capacities (by air) follow the order of MIL-101(Cr) (55.5 mg g −1 )> UiO-66 (26.1 mg g −1 )> AC (24.5 mg g −1 )>ZIF-8 (19.3 mg g −1 )> Cu-BDC (5.5 mg g −1 ), indicating that hexanal adsorbed on MIL-101 (Cr)/UiO-66 is more appropriate than the commercial AC to be desorbed. FTIR analysis confirms that O–H in Cr–OH/Zr–OH, O–C–O and aromatic C–H in H 2 BDC in both MIL-101 (Cr) and UiO-66 are possible sites for hexanal adsorption. DFT calculations further reveal that Cr–OH/Zr–OH and aromatic C–H in H 2 BDC are important sites to interact with C O in hexanal. This study provides a possibility to purify indoor aldehyde contaminants by the highly porous MOF materials.
研究领域:
材料科学
·
环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Pei Lyu,Liangjun Xia,Xin Liu,Christopher Hurren,Weilin Xu,Xungai Wang
Environmental pollution and resource waste are two major concerns with the development of civilization. During hemp fiber separation short fiber noil is produced as a waste. This paper demonstrates the reuse of waste hemp noil by dissolution in a precooled NaOH/urea system to form porous aerogels. After hydrophobization, the hemp aerogels exhibited self-cleaning ability and could be used for oil adsorption and air purification. The superhydrophobic hemp aerogels exhibited elastic behavior with 75 % recoverable strain after 10 cycles of compression. The high porosity and compressibility endowed hemp aerogels with excellent oil absorption capacity and reusability. With a fiber concentration of 1.5 %, the hemp aerogel could achieve an oil removal of 29.4 times of its own weight, whilst 85.4 % of the initial absorption capacity remained after 10 absorption/desorption cycles. The ultrafast oil absorption was completed within 0.048 s. The oil contaminated hemp aerogel could be self-cleaned in an ethanol solution. The hemp aerogels also had high removal efficiencies of particulate materials (PM) such as PM 2.5 and PM 10 at both 94 %. The remodeled waste hemp noil showed great potential in environmental governance and recycling of natural resources.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
POLYMER
·
2022
·
IF 4.432
Pengfei Tan,Yuanzhang Jiang,Dakai Gong,Yidong Shi,Xianning Shi,Pengfei Wu,Lin Tan
Health problems caused by airborne particulate matter (PM) and bacteria have placed a severe burden on public health. At present, most personal protective equipment focused on PM filtration but ignored the threat from pathogens like bacteria in the air. Moreover, the disposable protective items such as masks used in large quantities have caused great pollution issues. Hence, in this study, a fresh polyurethane nanofibrous membrane (named as PU/PIU-Cl) was synthesized with imidazolidinyl urea groups as block components for enhanced biocidal effect which not only has extremely high filtration efficiency (up to 99.92%) against particulate pollutants, but also excellent intrinsic antibacterial ability (>99%) and safety, indicating its remarkable performance for integrated air pollution control. Furthermore, the antibacterial ability of the membrane can be facilely regenerated by re-chlorination, and the active chlorine content of PU/PIU-Cl membrane through halogenation hardly decreased after five cycles. Therefore, the PU/PIU-Cl nanofibrous membrane can not only be used as protective equipment, such as masks with sterilization function, but also can effectively alleviate the pollution problem of disposable protective products.
研究领域:
环境科学
·
材料科学
·
公共卫生
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）