Visible-light-driven deep oxidation of NO over Fe doped TiO2 catalyst: Synergic effect of Fe and oxygen vacancies

Cheng, Gang; Liu, Xin; Song, Xinjie; Chen, Xun; Dai, Wenxin; Yuan, Rusheng; Fu, Xianzhi

doi:10.1016/j.apcatb.2020.119196

Cited by 178 publications

(76 citation statements)

References 74 publications

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“…[167] (Figure 11 Besides the aqueous organic contaminates, photocatalysts with OVs have been employed to remove gaseous pollutants, for example, NO, Hg 0 , and SO 2 . [164,165,[168][169][170][171][172] Fe doped TiO 2 nanoparticles exhibited better catalytic properties of NO oxidation than pristine sample under visible light irradiation. [171] The incorporation of Fe ions facilitated the formation of OVs on the surface of TiO 2 , providing more adsorption and activation sites for NO oxidation reaction.…”

Section: Pollutants Removalmentioning

confidence: 97%

Oxygen Vacant Semiconductor Photocatalysts

Lin

Huang

2021

Adv Funct Materials

328

143

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Semiconductor photocatalysis acts as a sustainable green technology to convert solar energy for environmental purification and production of renewable energy. However, the current photocatalysts suffer from inefficient photoabsorption, rapid recombination of photogenerated electrons and holes, and inadequate surface reactive sites. Introduction of oxygen vacancies (OVs) in photocatalysts has been demonstrated to be an efficacious strategy to solve these issues and improve photocatalytic efficiency. This review systematically summarizes the recent progress in the oxygen vacant semiconductor photocatalysts. Firstly, the formation and characterizations of OVs in semiconductor photocatalysts are briefly introduced. Then, highlighted are the roles of OVs in the photocatalytic reactions of three types of typical oxygencontaining semiconductors, including metal oxides (TiO 2 , ZnO, WO 3 , W 18 O 49 , MoO 3 , BiO 2-x , SnO 2 , etc), hydroxides (In(OH) 3 , Ln(OH) 3 (Ln=La, Pr, and Nd), Layered double hydroxides) and oxysalts (bismuth-based oxysalts and others) photocatalysts. Moreover, the advanced photocatalytic applications of oxygen vacant semiconductor photocatalysts, such as pollutant removal, H 2 production, CO 2 reduction, N 2 fixation and organic synthesis are systematically summarized. Finally, an overview on the current challenges and a prospective on the future of oxygen vacant materials is proposed.

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Section: Pollutants Removalmentioning

confidence: 97%

Oxygen Vacant Semiconductor Photocatalysts

Lin

Huang

2021

Adv Funct Materials

328

143

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“…Doping with iron(III) has been widely investigated among different metal ions because of its distinctive electronic structure and size, that closely matches the titanium (IV) [ 11 , 12 , 13 ]. The electronic states of iron ions in titania lead to the creation of effective electron and holes trapping sites leading to the enhanced photocatalytic activity [ 14 , 15 ].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Fe-TiO2 Nanomaterial: Performance Evaluation for RB5 Decolorization and In Vitro Antibacterial Studies

et al. 2021

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A photocatalytic system for decolorization of double azo reactive black 5 (RB5) dye and water disinfection of E. coli was developed. Sol gel method was employed for the synthesis of Fe-TiO2 photocatalysts and were characterized using thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM) coupled with energy dispersive X-ray analysis (EDX), transmission electron microscopy (TEM), diffuse reflectance spectroscopy (DRS) and Brunauer–Emmett–Teller (BET) analysis. Results showed that photocatalytic efficiency was greatly influenced by 0.1 weight percent iron loading and 300 °C calcination temperature. The optimized reaction parameters were found to be the ambient temperature, working solution pH 6.2 and 1 mg g−1 dose to completely decolorize RB5. The isotherm studies showed that RB5 adsorption by Fe-TiO2 followed the Langmuir isotherm with maximum adsorption capacity of 42.7 mg g−1 and Kads 0.0079 L mg−1. Under illumination, the modified photocatalytic material had higher decolorization efficiency as compared to unmodified photocatalyst. Kinetic studies of the modified material under visible light irradiation indicated the reaction followed the pseudo-first-order kinetics. The illumination reaction followed the Langmuir-Hinshelwood (L-H) model as the rate of dye decolorization increased with an incremental increase in dye concentration. The L-H constant Kc was 1.5542 mg L–1∙h–1 while Kads was found 0.1317 L mg–1. The best photocatalyst showed prominent percent reduction of E. coli in 120 min. Finally, 0.1Fe-TiO2-300 could be an efficient photocatalyst and can provide a composite solution for RB5 decolorization and bacterial strain inhibition.

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“…2b, the main peaks located at around 709.58 and 722.89 eV were linked to the Fe 2p 3/2 and Fe 2p 1/2 , respectively. 27,28 They can be further tted with six peaks: two peaks locating at 710 and 723.20 eV assigned to Fe 3+ with the satellite peaks at 714.53 and 729.89 eV as the ngerprint of Fe 3+ , 28,29 and the additional peaks at 708.50 and 722.00 eV associated with Fe 2+ . 30 The XPS data for Ti 2p (Fig.…”

Section: Resultsmentioning

confidence: 99%

“…32,33 According to XPS results, it could be inferred that Vo might be present in the ultrathin nanosheets and mixed-valent iron ions were potential to be converted into each other during the photochemical reaction. 27,34 Compared to the bulk TiO 2 , the ultrathin TiO 2 nanosheets intrinsically possess more defect structures (e.g. Vo) for decreasing surface energy of nanomaterials in theory, which was further veried by a series of characterizations.…”

Section: Resultsmentioning

confidence: 99%

Enhanced active oxidative species generation over Fe-doped defective TiO₂ nanosheets for boosted photodegradation

et al. 2020

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Visible-light-driven deep oxidation of NO over Fe doped TiO2 catalyst: Synergic effect of Fe and oxygen vacancies

Cited by 178 publications

References 74 publications

Oxygen Vacant Semiconductor Photocatalysts

Oxygen Vacant Semiconductor Photocatalysts

Synthesis and Characterization of Fe-TiO2 Nanomaterial: Performance Evaluation for RB5 Decolorization and In Vitro Antibacterial Studies

Enhanced active oxidative species generation over Fe-doped defective TiO₂ nanosheets for boosted photodegradation

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Visible-light-driven deep oxidation of NO over Fe doped TiO2 catalyst: Synergic effect of Fe and oxygen vacancies

Cited by 178 publications

References 74 publications

Oxygen Vacant Semiconductor Photocatalysts

Oxygen Vacant Semiconductor Photocatalysts

Synthesis and Characterization of Fe-TiO2 Nanomaterial: Performance Evaluation for RB5 Decolorization and In Vitro Antibacterial Studies

Enhanced active oxidative species generation over Fe-doped defective TiO2 nanosheets for boosted photodegradation

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Enhanced active oxidative species generation over Fe-doped defective TiO₂ nanosheets for boosted photodegradation