Disparate roles of doped metal ions in promoting surface oxidation of TiO 2 photocatalysis

Xiao, Jiadong; Xie, Yongbing; Cao, Hongbin; Nawaz, Faheem; Zhang, Shanshan; Wang, Yueqiu

doi:10.1016/j.jphotochem.2015.09.013

Cited by 42 publications

(20 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For the catalysts calcined at 400-500°C, the S BET increased with an increase in the content of the dopant. This can be attributed to the segregation of the dopant cations at the grain boundary, which inhibits grain growth by restricting the coalescence of some smaller neighboring grains [16]. For the catalysts calcined at 550-600°C, when the doping amount increased, the S BET increased at first, and then decreased.…”

Section: Resultsmentioning

confidence: 99%

Enhanced photocatalytic oxidation of humic acids using Fe3+-Zn2+ co-doped TiO2: The effects of ions in aqueous solutions

Yuan

Liú

Wang

et al. 2017

Environmental Engineering Research

View full text Add to dashboard Cite

Photocatalytic oxidation in the presence of Fe-doped, Zn-doped or Fe-Zn co-doped TiO2 was used to effectively decompose humic acids (HAs) in water. The highest HAs removal efficiency (65.7%) was achieved in the presence of 500°C calcined 0.0010% Fe-Zn co-doped TiO2 with the Fe:Zn ratio of 3:2. The initial solution pH value, inorganic cations and anions also affected the catalyst photocatalytic ability. The HAs removal for the initial pH of 2 was the highest, and for the pH of 6 was the lowest. The photocatalytic oxidation of HAs was enhanced with the increase of the Ca 2+ or Mg 2+ concentration, and reduced when concentrations of some anions increased. The inhibition order of the anions on TiO2 photocatalytic activities was CO3 2-> HCO3-> Cl-, but a slightly promotion was achieved when SO4 2was added. Total organic carbon (TOC) removal was used to evaluate the actual HAs mineralization degree caused by the 500°C calcined 0.0010% Fe-Zn (3:2) co-doped TiO2. For tap water added with HAs, the UV254 and TOC removal rates were 57.2% and 49.9%, respectively. The UV254 removal efficiency was higher than that of TOC because of the generation of intermediates that could significantly reduce the UV254, but not the TOC.

show abstract

Section: Resultsmentioning

confidence: 99%

Enhanced photocatalytic oxidation of humic acids using Fe3+-Zn2+ co-doped TiO2: The effects of ions in aqueous solutions

Yuan

Liú

Wang

et al. 2017

Environmental Engineering Research

View full text Add to dashboard Cite

show abstract

“…The ionic dopants had an important effect on the available charge carriers by either shifting the absorption edge to higher wavelength or by increasing the lifetime of charge carriers [29,30]. Additionally, the ionic dopants can trap photoinduced electrons and suppress charge recombination, and, thus, enhance the photocatalytic activity [32]. The enhancing effect of Ag ?…”

Section: Photocatalysismentioning

confidence: 99%

Hydrothermal synthesis of Ag-doped BiOI nanostructure used for photocatalysis

et al. 2015

View full text Add to dashboard Cite

A series of Ag-doped BiOI photocatalysts with different Ag contents was successfully synthesized by a hydrothermal method at 120°C for 24 h. The assynthesized products were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and photoluminescence (PL) spectroscopy. The photocatalytic activities of the undoped BiOI and Ag-doped BiOI products under UV visible and visible daylight were evaluated through the decolorization of methyl orange (MO) and methylene blue in aqueous solutions. In this research, 1.0 mol% Ag-doped BiOI microflowers revealed the highest decolorization efficiency of 91.26 % to degrade MO under visible daylight within 180 min, controlled by the open surface area of the photocatalyst and illumination intensity.

show abstract

“…The photocatalytic properties of the titanium oxide (TiO 2 ) were first reported in 1972 (1). Since then, a large amount of work has been dedicated to TiO 2 with application in the realm of solar cells (2)(3)(4), dye wastewater decolorization (5)(6)(7)(8)(9) and self-cleaning (10)(11)(12) etc. On account of its UVblocking properties, this has been used in sunscreen lotions and coated on textile fabrics for enhancing the UV protection to the user.…”

Section: Introductionmentioning

confidence: 99%

Development of Cotton Fabrics with Durable UV Protective and Self‐cleaning Property by Deposition of Low TiO₂ Levels through Sol–gel Process

Mishra

Butola

2018

Photochem & Photobiology

View full text Add to dashboard Cite

In this article, the deposition of TiO on cotton fabric using sol-gel technique has been described. Various process routes (pad-dry-cure, pad-dry-hydrothermal and pad-dry-solvothermal) were examined to impart a stable coating of TiO on fabric. The role of precursor concentration, process temperature and time of treatment were studied to aim at a wash durable, UV protective and self-cleaning property in the treated fabric. EDX and ICP-MS techniques were used to examine the add-on percentage of TiO on cotton fabrics treated via different routes. It has been found that the TiO remains largely amorphous and nondurable if it is given a short thermal treatment. To convert the deposited TiO to its anatase crystal form, a prolonged hydrothermal treatment for at least 3 h needs to be given. TiO deposition levels of less than 0.1% were found to be effective in imparting reasonable degree of UV protection and self-cleaning property to the cotton fabric. The self-cleaning ability of the treated fabric against coffee stain was also studied and was found to be related to the process route and the deposition levels of TiO .

show abstract

Disparate roles of doped metal ions in promoting surface oxidation of TiO 2 photocatalysis

Cited by 42 publications

References 44 publications

Enhanced photocatalytic oxidation of humic acids using Fe3+-Zn2+ co-doped TiO2: The effects of ions in aqueous solutions

Enhanced photocatalytic oxidation of humic acids using Fe3+-Zn2+ co-doped TiO2: The effects of ions in aqueous solutions

Hydrothermal synthesis of Ag-doped BiOI nanostructure used for photocatalysis

Development of Cotton Fabrics with Durable UV Protective and Self‐cleaning Property by Deposition of Low TiO₂ Levels through Sol–gel Process

Contact Info

Product

Resources

About

Disparate roles of doped metal ions in promoting surface oxidation of TiO 2 photocatalysis

Cited by 42 publications

References 44 publications

Enhanced photocatalytic oxidation of humic acids using Fe3+-Zn2+ co-doped TiO2: The effects of ions in aqueous solutions

Enhanced photocatalytic oxidation of humic acids using Fe3+-Zn2+ co-doped TiO2: The effects of ions in aqueous solutions

Hydrothermal synthesis of Ag-doped BiOI nanostructure used for photocatalysis

Development of Cotton Fabrics with Durable UV Protective and Self‐cleaning Property by Deposition of Low TiO2 Levels through Sol–gel Process

Contact Info

Product

Resources

About

Development of Cotton Fabrics with Durable UV Protective and Self‐cleaning Property by Deposition of Low TiO₂ Levels through Sol–gel Process