Structure and catalytic performance of Zn-doped TiO₂ film

Abstract

Purpose This paper aims to investigate the photocatalytic activity of zinc doped MAO-TiO2 films under the optimum MAO treatment condition. Design/methodology/approach The coating was prepared by micro arc oxidation, and the influence of doping on the properties of the coating was also investigated. Findings The results show that the BET surface area is 78.25±0.03m2/g, total pore area is 76.32 ± 0.04m2/g, and the total pore volume is 0.2135 ± 0.0004cm3/g. The degradation ratio of the film electrode with Zn-doped in methyl orange solution is up to 94%. When the react circles is 10 times, the degradation ratio is up to more than 85% and remains steady. With the different reaction conditions, these kinetics of the reactions show some different formulas. Originality/value A kinetic equation for photocatalytic activity is established.

Effect of heat treating process on phase transformation and photocatalytic activity of Zn‐doped nano‐titania

“…The TiO 2 nanopowder sintered at 700°C was exposed to ultraviolet light for only 60 min, and the degradation rate of MB reached more than 95%, indicating that it has a good application prospect. In addition, it is of great significance to prepare photocatalysts with high degradation rate of organic matter by the economical and simple preparation method of sol–gel method compared to other complex preparing method [17–19].…”

“…Fu et al [16] have reported that the doping of zinc could induce a significant change of particle size, then affecting the photoelectric properties. Mei Yang et al [17] prepared the zinc‐doped micro‐arc oxidation (MAO)‐TiO 2 films using titanium substrate and Zn(NO 3 ) 2 solution. They discovered that Zn doping broadens the absorption spectra of the investigated films and the excitation wavelength of MAO Zn film electrode was extended to the visible light range.…”

Influence of Group III and IV Elements on the Hydrogen Evolution Reaction of MoS2 Disulfide

“…The environmental problems caused by the increase in fossil fuel consumption as well as the huge energy demand have invited the society to pay attention to sustainable new energy. − Hydrogen is considered a good substitute for fossil fuels due to its comprehensive sources, extremely high calorific value, nonpolluting combustion, and renewable cycle. − There are many ways to obtain hydrogen, − but hydrogen production by electrolysis of water is regarded as a reliable method due to its high purity, high efficiency, and nonpollution during the hydrogen production process. − Hydrogen production by electrolysis of water usually requires catalysts to accelerate water splitting and such catalysts are noble metals. However, due to the high price and scarcity of noble metals, the large-scale application of hydrogen production by electrolysis of water is limited. − Therefore, it is urgent to find alternative non-noble metal-based electrocatalysts.…”

Construction and photocatalytic performance of fluorinated ZnO–TiO2heterostructure composites

“…Organic pollutants are degraded into inorganic substances such as H 2 O and CO 2 via photocatalytic reactions. [8][9][10][11][12] Nowadays, many kinds of photocatalysts have been found, mainly including semiconductor metal oxides and semiconductor metal suldes, such as TiO 2 , ZnO, CdS, ZnS, etc. [13][14][15][16][17][18][19] Among them, TiO 2 has attracted extensive attention because of its low cost, non-toxicity and good photocatalytic activity.…”