In-situ nitrogen-doped black TiO2 with enhanced visible-light-driven photocatalytic inactivation of Microcystis aeruginosa cells: Synthesization, performance and mechanism

Cai, Min; Zhang, Xu; Cui, Naxin; Chen, Guifa; Zou, Guoyan

doi:10.1016/j.apcatb.2020.119019

Cited by 72 publications

(31 citation statements)

References 76 publications

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“…Except for the samples annealed under He atmosphere, the urea addition inhibited the transfer from anatase to rutile phase for samples annealed under vacuum or N 2 atmosphere. The same results had been observed in our previous study [ 17 ]. From Figure 2 c, the intensities and the full width at half maxima of (101) peaks in the samples with urea addition were sharper than those in the samples without urea addition, which indicated that crystal sizes became larger [ 21 ].…”

Section: Resultssupporting

confidence: 92%

“…On the other hand, why did the addition of urea inhibit the formation of OVs? Our previous study revealed that the addition of urea addition as an N precursor inhibited the incorporation of N and the production of OVs [ 17 ]. Nevertheless, it had been previously revealed that N doping facilitates the formation of OVs [ 32 ].…”

Section: Resultsmentioning

confidence: 99%

“…The synthesis process has been reported in our previous work [ 17 ]. Briefly, tetrabutyl titanate (14 mL) and urea (0.6 g) were mixed in ethanol (20 mL) using a magnetic stir bar (500 rpm) to form a light-yellow transparent solution A.…”

Section: Methodsmentioning

confidence: 99%

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Defective Black TiO2: Effects of Annealing Atmospheres and Urea Addition on the Properties and Photocatalytic Activities

et al. 2021

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A series of black TiO2 with and without the addition of urea were successfully prepared using a simple one-step synthetic method by calcination under different atmospheres (vacuum, He, or N2). The physicochemical, optical, and light-induced charge transfer properties of the as-prepared samples were characterized by various techniques. It was found that a vacuum atmosphere was more beneficial for the formation of oxygen vacancies (OVs) than the inert gases (He and N2) and the addition of urea-inhibited OVs formation. The samples annealed in the vacuum condition exhibited better visible-light adsorption abilities, narrower bandgaps, higher photo-induced charge separation efficiency, and lower recombination rates. Hydroxyl radicals (·OH) were the dominant oxidative species in the samples annealed under a vacuum. Finally, the samples annealed under vacuum conditions displayed higher photocatalytic activity for methylene blue (MB) degradation than the samples annealed under He or N2. Based on the above, this study provides new insights into the effects of annealing atmospheres and urea addition on the properties of black TiO2.

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Section: Resultssupporting

confidence: 92%

Section: Resultsmentioning

confidence: 99%

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Defective Black TiO2: Effects of Annealing Atmospheres and Urea Addition on the Properties and Photocatalytic Activities

et al. 2021

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“…There is only ~ 4-5% of solar light being within the UV range, while the visible light contributes about 50% of the total power. Therefore, many attempts were made to attain visible-light-induced photocatalytic activities, for instance, structure modification, metal and nonmetal doping, co-deposition of metals, and mixing of two semiconductors (Ref 72 - 75 ).…”

Section: Thermal-sprayed Photocatalytic Coatingsmentioning

confidence: 99%

“…It was found that the urea addition inhibits the anatase to rutile phase transformation and also the formation of black TiO 2 by N doping. The black TiO 2 had more efficient excited charge separation and higher photocatalytic efficiency for algae inactivation (Ref 88 ). Furthermore, to facilitate the application of black TiO 2 , Zhai et al fabricated black TiO 2 coatings by using a suspension plasma spray (SPS) method.…”

Section: Thermal-sprayed Photocatalytic Coatingsmentioning

confidence: 99%

Thermal-Sprayed Photocatalytic Coatings for Biocidal Applications: A Review

et al. 2020

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There have been ever-growing demands for disinfection of water and air in recent years. Efficient, eco-friendly, and cost-effective methods of disinfection for pathogens are vital to the health of human beings. The photocatalysis route has attracted worldwide attention due to its highly efficient oxidative capabilities and sustainable recycling, which can be used to realize the disinfection purposes without secondary pollution. Though many studies have comprehensively reviewed the work about photocatalytic disinfection, including design and fabrication of photocatalytic coatings, inactivation mechanisms, or practical applications, systematic reviews about the disinfection photocatalysis coatings from fabrication to effort for practical use are still rare. Among different ways of fabricating photocatalytic materials, thermal spray is a versatile surface coating technique and competitive in constructing large-scale functional coatings, which is a most promising way for the future environmental purification, biomedical and life health applications. In this review, we briefly introduced various photocatalytic materials and corresponding inactivation mechanisms for virus, bacteria and fungus. We summarized the thermal-sprayed photocatalysts and their antimicrobial performances. Finally, we discussed the future perspectives of the photocatalytic disinfection coatings for potential applications. This review would shed light on the development and implementation of sustainable disinfection strategies that is applicable for extensive use for controlling pathogens in the near future.

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A facile synthesis of bio‐inspired hierarchical microstructure TiO₂: Characterization and photocatalytic activity

Türkten

Karataş

Karatas

et al. 2022

Env Prog and Sustain Energy

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Hierarchical photocatalysts have attracted notable concern due to their excellent features such as lower density, higher specific surface area, higher light-harvesting efficiency, and good surface permeability. Generally, such particular properties are achieved via the use of templates, preferentially focusing on natural biological materials.In this respect, rice husk (RH), an environmental waste containing elements C, N, S, and Si was used as a biotemplate to prepare TiO 2 hierarchical microstructure photocatalyst (TiO 2 -HMP) along with TiO 2 nanoparticle photocatalyst (TiO 2 -NP) by a facile sol-gel method. RH and the prepared TiO 2 photocatalysts were characterized by using Fourier transform infrared (FTIR), X-ray powder diffraction (XRD), environmental scanning electron microscope-energy dispersive X-ray analysis (ESEM-EDAX), X-ray photoelectron spectroscopy (XPS), UV-visible diffuse reflectance spectroscopy (UV-DRS), photoluminescence (PL), and Brunauer-Emmett-Teller (BET) methods. The combination of RH and TiO 2 via biotemplate strategy not only altered the band gap (E bg = 2.74 eV) also slightly increased the surface area ($10%). The photocatalytic activities of TiO 2 -NP and TiO 2 -HMP specimens were determined by degradation of 4-nitrophenol (4-NPh) under UV-A light irradiation. TiO 2 -HMP exhibited enhanced photocatalytic activity (≥10%) compared to TiO 2 -NP most probably due to RH originated in-situ self-codoping by the presence of multidopant ions (C, N, S, and Si ions) as verified by EDAX elemental weight distribution profiles. These results demonstrated a beneficial use of an environmental waste in photocatalytic applications.

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In-situ nitrogen-doped black TiO2 with enhanced visible-light-driven photocatalytic inactivation of Microcystis aeruginosa cells: Synthesization, performance and mechanism

Cited by 72 publications

References 76 publications

Defective Black TiO2: Effects of Annealing Atmospheres and Urea Addition on the Properties and Photocatalytic Activities

Defective Black TiO2: Effects of Annealing Atmospheres and Urea Addition on the Properties and Photocatalytic Activities

Thermal-Sprayed Photocatalytic Coatings for Biocidal Applications: A Review

A facile synthesis of bio‐inspired hierarchical microstructure TiO₂: Characterization and photocatalytic activity

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In-situ nitrogen-doped black TiO2 with enhanced visible-light-driven photocatalytic inactivation of Microcystis aeruginosa cells: Synthesization, performance and mechanism

Cited by 72 publications

References 76 publications

Defective Black TiO2: Effects of Annealing Atmospheres and Urea Addition on the Properties and Photocatalytic Activities

Defective Black TiO2: Effects of Annealing Atmospheres and Urea Addition on the Properties and Photocatalytic Activities

Thermal-Sprayed Photocatalytic Coatings for Biocidal Applications: A Review

A facile synthesis of bio‐inspired hierarchical microstructure TiO2: Characterization and photocatalytic activity

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A facile synthesis of bio‐inspired hierarchical microstructure TiO₂: Characterization and photocatalytic activity