Facile fabrication of the Ag nanoparticles decorated graphitic carbon nitride photocatalyst film for indoor air purification under visible light

Wang, Fengping; Li, Wei; Zhang, Wanming; Ye, Ranran; Tan, Xiaodan

doi:10.1016/j.buildenv.2022.109402

Cited by 15 publications

(5 citation statements)

References 53 publications

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“…The major generated species during the degradation process include superoxide radical anions and holes rather than hydroxyl radicals. The developed photocatalytic probe exhibited excellent recyclability even after ten successive cycles of application [31].…”

Section: Application Of Silver Nanoparticles For the Environmentmentioning

confidence: 99%

The Use of Silver Nanoparticles in Environmental Remediation

Panda¹,

Chakroborty²,

Krishna³

2023

Preprint

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The invention of nanoscience not only brings a revolutionary change in the field of science but also changed the direction of research. Today the whole world is under the trigger of nano and nanoparticles have multidimensional applications in every aspect of life including environmental point of view. Till today a plethora of nanoparticles have been synthesized and have also been applied for multiple purposes and hence grabbed the attention of researchers all over the world. Among the bunch of NPs discovered to date, we have a particular interest in silver nanoparticles (AgNPs) because of their cost-effectiveness and huge abundance in the earth’s crust. With respect to every passing day, due to various kinds of anthropological activities, the quality of the environment such as air, water and soil is depleting which ultimately hampers the human civilization. To encompass the growing environmental issues, many techniques have been adopted. Among the many strategies, tackling the current issues regarding environment through nanoscience is highly worthy as because of its cost-effectiveness, less time consuming and easy handling process. This article reviews the potential of nanoparticles, particularly silver nanoparticles, for a wide range of environmental applications, such as soil, air, and water remediation.

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Section: Application Of Silver Nanoparticles For the Environmentmentioning

confidence: 99%

The Use of Silver Nanoparticles in Environmental Remediation

Panda¹,

Chakroborty²,

Krishna³

2023

Preprint

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“…The bacterial structures associated with intact and damaged states on the bare air filter, flat nanostructured air filter (FNAF) and PNAF were investigated using SEM. Escherichia coli (E. coli) was used as a test bacterium since it has been widely used in antibacterial nanostructured surface studies [19,35] and has been used in various bioaerosol sterilization [36][37][38] and transfer studies. [39] A 10 µL droplet of E. coli suspension corresponding to a concentration of 10 3 CFU was dispensed on the bare and nanostructured air filters and dried at an air velocity of 2.4 m s −1 for 30 min.…”

Section: Mechano-bactericidal Activity Of Pnafmentioning

confidence: 99%

Catalyst Droplet‐Based Puncturable Nanostructures with Mechano‐Bactericidal Properties Against Bioaerosols

Lee

Kim

Kwak

et al. 2023

Adv Funct Materials

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Bioaerosol contamination problems have led to the need for new technologies that effectively collect and inactivate airborne microorganisms. Typical nanomaterial‐based filter membranes are usually sterilized using photocatalysts, electrical stimulation, and thermal treatment, which are expensive and require additional devices and cumbersome manufacturing. In this study, a membrane with nanotopographical features is manufactured via a catalyst droplet‐based procedure to mechanically damage airborne bacteria. The catalyst droplets are used as templates for in situ novel puncturable nanopillar growth on the membrane surface. Numerical simulations and microscopic observations show that puncturable nanopillars with a thin and rough nano‐edge are advantageous for rupturing the bacterial cell compared to flat nanopillars without a thin edge. A puncturable nanostructured air filter (PNAF) is compared to a bare air filter and exhibits higher bioaerosol collection efficiencies (>98% and 89.3–95.7%, respectively). PNAF is tested under breathing conditions as part of a face mask, where it effectively captures and deactivates E. coli aerosols through a mechano‐bactericidal effect, resulting in the inhibition of bacterial proliferation and finally death. Thus, PNAF can be applied as an air purifier or face mask filter for bioaerosol collection presenting antibacterial effects without external stimulation.

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“…Hence, the treatment of HCHO has attracted much attention. There are many traditional methods for HCHO treatment, such as adsorption purification method [6][7][8][9][10], biological degradation method [11][12][13], air negative ion technology [14][15][16], and thermal destruction method [17][18][19]. However, these methods all have certain deficiencies for poor HCHO treatment effect and easily-triggered secondary pollution.…”

Section: Introductionmentioning

confidence: 99%

Theoretical Study of the Impact of Pore Size in TiO₂ Aerogels on Photocatalytic Formaldehyde Decomposition

Xiang,

Sun,

2024

Preprint

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Formaldehyde (HCHO), an indoor volatile organic compound, is seriously harmful to human health. Therefore, green and effective decomposition of HCHO is essential. TiO2 has been employed for the degradation of HCHO via photocatalytic generation of reactive oxygen species (ROS) (O2-, ·OH), yet the low specific surface area of crystalline TiO2 depressed the catalytic performance. Herein, we prepared TiO2 aerogels with high specific surface area and high porosity by sol-gel method, and added PVA to introduce flexible molecular chains for pore size regulation. The photocatalytic performance test verifies that the pore size of TiO2 aerogel is one of the important factors for HCHO decomposition. Notably, through the establishment of theoretical model and calculation, we validated that the efficiency of HCHO decomposition is related to the oxygen pressure in the pores of TiO2 aerogel, and the oxygen pressure is inversely proportional to the pore size. Accordingly, the optimal pore size of TiO2 aerogel for the photocatalytic HCHO decomposition is 2 nm~10 nm. This study provides a theoretical idea for TiO2 aerogels in the decomposition reaction of HCHO, which is expected to inspire more breakthroughs in the study of TiO2 aerogels for green chemistry.

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Facile fabrication of the Ag nanoparticles decorated graphitic carbon nitride photocatalyst film for indoor air purification under visible light

Cited by 15 publications

References 53 publications

The Use of Silver Nanoparticles in Environmental Remediation

The Use of Silver Nanoparticles in Environmental Remediation

Catalyst Droplet‐Based Puncturable Nanostructures with Mechano‐Bactericidal Properties Against Bioaerosols

Theoretical Study of the Impact of Pore Size in TiO₂ Aerogels on Photocatalytic Formaldehyde Decomposition

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