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Highly Efficient,Dual‑Functional Self‑Assembled Electrospun Nanofiber Filters for Simultaneous PM Removal and On‑Site Eye‑Readable formaldehyde sensing

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Advanced Fiber Materials 2023年第3期5卷 1088-1103页

作者： Jin Yeong Song Seongmin Kim Jaeseong Park Sang Min Park School of Mechanical Engineering Pusan National University63‑2 Busan University‑RoGeumjeong‑GuBusan 46241South Korea

Air pollution containing particulate matter(PM)and volatile organic compounds has caused magnificent burdens on indi-vidual health and global *** advances in highly efficient or multifunctional nanofiber filters have been achieved,many existing filters can only deal with one type of air pollutant,such as capturing PM or absorbing and detecting toxic ***,highly efficient,dual-functional,self-assembled electrospun nanofiber(SAEN)filters were developed for simultaneous PM removal and onsite eye-readable formaldehyde sensing fabricated on a commercial fabric *** the use of an electrolyte solution containing a formaldehyde-sensitive colorimetric agent as a collector during electrospinning,the one-step fabrication of the dual-functional SAEN filter on commercial masks,such as a fabric mask and a daily dispos-able mask,was *** electrolyte solution also allowed the uniform deposition of electrospun nanofibers,thereby achieving the high efficiency of PM filtration with an increased quality factor up to twice that of commercial *** SAEN filter enabled onsite and eye-readable formaldehyde gas detection by changing its color from yellow to red under a 5 ppm concentrated formaldehyde gas *** repetitive fabrication and detachment of the SAEN filter on a fabric mask minimized the waste of the mask while maintaining high filtration efficiency by replenishing the SAEN filters and reusing the fabric *** the dual functionality of SAEN filters,this process could provide new insights into design-ing and developing high performance and dual-functional electrospun nanofiber filters for various applications,including individual protection and indoor purification applications.

关键词： Electrospinning Nanofiber Self-assembly PM removal formaldehyde sensing

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PtCu-SnO_(2)nanocomposites for ultrasensitive and rapid ultra-low formaldehyde sensing

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ChemPhysMater 2022年第3期1卷 227-236页

作者： Zejun Han Yunxiang Tang Guixia Lu Yuan Qi Hao Wu Zhengyi Yang Hecheng Han Xue Zhang Lili Wu Zhou Wang Jiurong Liu Fenglong Wang Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of Education Shandong UniversityJinan 250061China School of Civil Engineering Qingdao University of TechnologyQingdao 266033China School of Energy and Environment City University of Hong KongHong Kong 999077China Shenzhen Research Institute of Shandong University A301 Virtual University Park in South District of Nanshan High-tech ZoneShenzhen 518057China

SnO 2 nanospheres with diameters of 30∼50 nm and Pt x Cu 1-x bimetallic nanoparticles with sizes of approxi-mately 10 nm were synthesized via hydrothermal and solvothermal methods,*** Pt x Cu 1-x bimetal-lic nanoparticles were impregnated on the surface of the SnO 2 spheres to form Pt x Cu 1-x-SnO 2 *** varying the atomic ratios between platinum(Pt)and copper(Cu),we found that Pt 0.75 Cu 0.25-SnO 2,with a large specific surface area of 89.21 m 2/g,enabled the selective and accurate detection of low-concentration formalde-hyde compared to other metal-deposited samples and pure SnO *** response value of Pt 0.75 Cu 0.25-SnO 2 to 500×10−9 formaldehyde was approximately 20 at an operating temperature of 160◦C with an extremely high-speed response(15 s).The porous structures with large specific surface areas,as well as the improved catalytic effects of Pt 0.75 Cu 0.25,comprehensively contributed to the enhanced sensing performance towards formaldehyde.

关键词： SnO_(2)nanospheres Pt^(x)Cu_(1-x)bimetallic nanoparticles formaldehyde sensing Catalytic effect

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Metal-organic frameworks-derived hierarchical ZnO structures as efficient sensing materials for formaldehyde detection

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Chinese Chemical Letters 2020年第8期31卷 2071-2076页

作者： Nan Zhang Luming Yan Yang Lu Yizhuo Fan Sijia Guo Samira Adimi Dali Liu Shengping Ruan State Key Laboratory on Integrated Optoelectronics and College of Electronic Science&Engineering Jilin UniversityChangchun 130012China ARTICLE INFO

Semiconducting metal oxides have been considered as effective approach for designing highperformance chemical sensing *** this paper,a kind of metal-organic frameworks ZIF-8 was used as sacrificed template to prepare porous ZnO hollow nanocubes for the application in gas *** is found that changing calcination temperature and solvent can greatly influence the morphology of the material,which finally affects the gas sensing ***-sensing properties of the sensors were investigated in *** can be clearly seen that the material used methanol as reaction solvent with the decomposition at 350℃for 2 h(ZnO-350-M)showed the optimal formaldehyde-sensing behaviors compared with other materials prepared in this *** dynamic transients of the ZnO-350-M-based sensors demonstrated a high response value(about 10),fast response and recovery rate(4 s and 4 s,respectively)and good selectivity towards 100 ppm(part per million)formaldehyde as well as a low detectable limit(1 ppm).As exemplified for the sensing inve stigation towards formaldehyde,the porous ZnO hollow nanocubes showed a significantly improved chemical sensitivity due to the highly syne rgistic effects from the well exposed surfaces,defect states and the robust ZnO.

关键词： Metal-organic framework ZIF-8 formaldehyde sensing Pore-rich structure ZnO nanocubes

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Ti_(3)C_(2)T_(x)/SnO_(2)P–N heterostructure construction boosts room-temperature detecting formaldehyde

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Rare Metals 2024年第1期43卷 267-279页

作者： Yue Zhang Ming-Yue Wang Xiao-Guang San Yan-Bai Shen Guo-Sheng Wang Lei Zhang Dan Meng College of Chemical Engineering Shenyang University of Chemical TechnologyShenyang 110142China Institute for Superconducting and Electronic Materials(ISEM) Australian Institute for Innovative Materials(AIIM)University ofWollongongWollongongNSW2500Australia College of Resources and Civil Engineering Northeastern UniversityShenyang 110819China

formaldehyde is a common atmospheric pollutant produced in industrial production and daily ***,the traditional semiconductor formaldehyde gas sensor cannot work at room temperature,which limits its practical ***,developing high-performance gas sensors for rapidly and accurately detecting formaldehyde at room temperature is an important *** this study,Ti_(3)C_(2)Tx/SnO_(2)heterostructures were constructed,which could selectively detect formaldehyde at room temperature with a response value of 29.16%(10×10^(-6)).In addition,the sensor shows a remarkable theoretical detection limit of 5.09×10^(-9)and good longterm *** functional theory(DFT)simulations reveal that SnO_(2)nano spheres provide the majority of adsorption sites that strongly interact with ***,Ti_(3)C_(2)T_(x)acting as a conductive layer facilitates the transfer of charge carriers so that they show a sensing response to formaldehyde at room ***,the formation of p-n heterostructures between SnO_(2)and Ti_(3)C_(2)T_(x)boosts the Schottky barrier at the interface,which is the critical factor in enhancing the sensing properties by turning the Schottky barrier upon introducing formaldehyde *** perspective is expected to provide instructive guidance for utilizing MXene/metal oxide nanocomposites to improve the gas sensing performance at room temperature.

关键词： Ti_(3)C_(2)T_(x)/SnO_(2)nanocomposites p-n heterostructures formaldehyde sensing Room temperature DFT calculations

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Novel formaldehyde Sensor based on Hydrogen Peroxide/Melamine Modulated Photoluminescence of Nitrogen-doped Graphene Quantum Dots

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Journal of Wuhan University of Technology(Materials Science) 2017年第6期32卷 1481-1486页

作者：张玉 SU Xingguang 马强 Department of Analytical Chemistry College of Chemistry Jilin University Changchun 130012 China

A modulated photoluminescence nanosensor was developed for the quantitative detection of formaldehyde with nitrogen-doped graphene quantum dots and melamine. The sensing system was based on the different activated effects of melamine and hydrogen peroxide on the photoluminescence intensity of nitrogendoped graphene quantum dots. Under the optimal conditions, the modulated photoluminescence sensing system can be used to detect formaldehyde with a good linear relationship between the nitrogen-doped graphene quantum dots photoluminescence difference and the concentration of formaldehyde. The novel sensing system provided new directions for the detection of formaldehyde with high selectivity and quick response.

关键词： nanosensor modulated photoluminescence nitrogen-doped graphene quantum dots formaldehyde sensing

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