Efficient visible light driven photocatalytic removal of NO with aerosol flow synthesized B, N-codoped TiO2 hollow spheres

Ding, Xing; Xiao, Song; Li, Pengna; Ai, Zhihui; Zhang, Lizhi

doi:10.1016/j.jhazmat.2011.03.099

Cited by 59 publications

(9 citation statements)

References 54 publications

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“…Temporarily trapping the photoexcited electrons using these doped impurities, and inhibiting the charge recombination, could also achieve enhanced photocatalysis (Chen et al 2012;Nagaveni et al 2004;Pan et al 2010;Wong et al 2006;Wu et al 2010b;Zhang et al 1998;Zhu et al 2004Zhu et al , 2006. Recent efforts to modify TiO 2 photocatalysts using nonmetals, such as boron, carbon, nitrogen, sulfur and fluorine (B, C, N, S, and F), efficiently extended the photoresponse from the UV to the visible light region (Asahi et al 2001;Ding et al 2011;Ho et al 2006;Huang et al 2008;Yu et al 2005;Zhao et al 2004). Further theoretical calculations also suggested that anion doping of TiO 2 has considerable effects on band gap alteration (Asahi et al 2001).…”

Section: Visible Light-responsive Tio 2 Photocatalystsmentioning

confidence: 99%

Bactericidal Effects and Mechanisms of Visible Light-Responsive Titanium Dioxide Photocatalysts on Pathogenic Bacteria

Liou

Chang

2012

Arch. Immunol. Ther. Exp.

175

131

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This review focuses on the antibacterial activities of visible light-responsive titanium dioxide (TiO(2)) photocatalysts. These photocatalysts have a range of applications including disinfection, air and water cleaning, deodorization, and pollution and environmental control. Titanium dioxide is a chemically stable and inert material, and can continuously exert antimicrobial effects when illuminated. The energy source could be solar light; therefore, TiO(2) photocatalysts are also useful in remote areas where electricity is insufficient. However, because of its large band gap for excitation, only biohazardous ultraviolet (UV) light irradiation can excite TiO(2), which limits its application in the living environment. To extend its application, impurity doping, through metal coating and controlled calcination, has successfully modified the substrates of TiO(2) to expand its absorption wavelengths to the visible light region. Previous studies have investigated the antibacterial abilities of visible light-responsive photocatalysts using the model bacteria Escherichia coli and human pathogens. The modified TiO(2) photocatalysts significantly reduced the numbers of surviving bacterial cells in response to visible light illumination. They also significantly reduced the activity of bacterial endospores; reducing their toxicity while retaining their germinating abilities. It is suggested that the photocatalytic killing mechanism initially damages the surfaces weak points of the bacterial cells, before totally breakage of the cell membranes. The internal bacterial components then leak from the cells through the damaged sites. Finally, the photocatalytic reaction oxidizes the cell debris. In summary, visible light-responsive TiO(2) photocatalysts are more convenient than the traditional UV light-responsive TiO(2) photocatalysts because they do not require harmful UV light irradiation to function. These photocatalysts, thus, provide a promising and feasible approach for disinfection of pathogenic bacteria; facilitating the prevention of infectious diseases.

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Section: Visible Light-responsive Tio 2 Photocatalystsmentioning

confidence: 99%

Bactericidal Effects and Mechanisms of Visible Light-Responsive Titanium Dioxide Photocatalysts on Pathogenic Bacteria

Liou

Chang

2012

Arch. Immunol. Ther. Exp.

175

131

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“…Codoping could combine the advantages of these dopants, leading to improved photocatalytic performance. This approach has been widely used in TiO 2 modification [21,22].…”

Section: Introductionmentioning

confidence: 99%

Novel P O codoped g-C3N4 with large specific surface area: Hydrothermal synthesis assisted by dissolution–precipitation process and their visible light activity under anoxic conditions

et al. 2015

Applied Surface Science

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“…Once NO gas was shut off, the Hg 0 removal efficiency also promptly recovered to a value slightly lower than its initial value. The following reactions could occur in the presence of NO:

NO + 3^{•} OH \to {NO}_{3}^{-} + H_{2} normalO + H^{+},

NO +^{•} {normalO}_{2}^{-} \to {NO}_{3}^{-}, and

2NO + {2h}^{+} + O_{2} + {2H}_{2} normalO \to {2NO}_{3}^{-} + {4H}^{+} .

…”

Section: Resultsmentioning

confidence: 99%

Photocatalytic activity and characterization of AgCl/Ag composite for Hg⁰removal under fluorescent light irradiation

Zhang

Xing

et al. 2018

Asia-Pacific J Chem Eng

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A AgCl/Ag composite was synthesized via a facile precipitation method and applied to the photocatalytic oxidation removal of elemental mercury (Hg0) in a wet bubbling reactor under fluorescent light irradiation. The fresh photocatalyst and the used materials were characterized by N2 physisorption, X‐ray diffraction, scanning electron microscopy and energy‐dispersive X‐ray spectroscopy, diffuse reflectance spectroscopy, X‐ray photoelectron spectroscopy, and electron spin resonance. The results showed that the AgCl/Ag photocatalyst and fluorescent light have a great synergistic effect on Hg0 removal. A higher solution temperature was not favorable for Hg0 removal. The presence of lower concentrations of SO2 or NO showed little effect on Hg0 removal, whereas the inhibition of SO2 or NO on Hg0 removal became more serious with the SO2 or NO concentration increasing. Some amounts of Ag0 were produced onto the AgCl/Ag surface during the process of Hg0 removal in the absence and presence of SO2 or NO. The trapping experiments confirmed that •O2− was the primary reactive species in the photocatalytic process.

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Efficient visible light driven photocatalytic removal of NO with aerosol flow synthesized B, N-codoped TiO2 hollow spheres

Cited by 59 publications

References 54 publications

Bactericidal Effects and Mechanisms of Visible Light-Responsive Titanium Dioxide Photocatalysts on Pathogenic Bacteria

Bactericidal Effects and Mechanisms of Visible Light-Responsive Titanium Dioxide Photocatalysts on Pathogenic Bacteria

Novel P O codoped g-C3N4 with large specific surface area: Hydrothermal synthesis assisted by dissolution–precipitation process and their visible light activity under anoxic conditions

Photocatalytic activity and characterization of AgCl/Ag composite for Hg⁰removal under fluorescent light irradiation

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Efficient visible light driven photocatalytic removal of NO with aerosol flow synthesized B, N-codoped TiO2 hollow spheres

Cited by 59 publications

References 54 publications

Bactericidal Effects and Mechanisms of Visible Light-Responsive Titanium Dioxide Photocatalysts on Pathogenic Bacteria

Bactericidal Effects and Mechanisms of Visible Light-Responsive Titanium Dioxide Photocatalysts on Pathogenic Bacteria

Novel P O codoped g-C3N4 with large specific surface area: Hydrothermal synthesis assisted by dissolution–precipitation process and their visible light activity under anoxic conditions

Photocatalytic activity and characterization of AgCl/Ag composite for Hg0removal under fluorescent light irradiation

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Product

Resources

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Photocatalytic activity and characterization of AgCl/Ag composite for Hg⁰removal under fluorescent light irradiation