A facile and general synthesis strategy to doped TiO₂ nanoaggregates with a mesoporous structure and comparable property

Abstract

A facile and general route was explored to fabricate porous metal-doped TiO 2 nanoaggregates from titanium glycolate precursor and metal salts, and the doping with Co or Ni is an effective approach to improve the photocatalytic efficiency.

Synthesis and characterization of BN/Bi2WO6 composite photocatalysts with enhanced visible-light photocatalytic activity

“…4b showed the plot of (αhv) 2 versus photon energy (hv) for the as-prepared composites and pure Bi 2 WO 6 , where α, h, and v are the absorption coefficient, constant, and light frequency, respectively. 34,35 The energy of the band gap is calculated by extrapolating the straight line to the abscissa axis. The band gap of the pure Bi 2 WO 6 was estimated to 2.89 eV.…”

Positive Ni(HCO3)2 as a Novel Cocatalyst for Boosting the Photocatalytic Hydrogen Evolution Capability of Mesoporous TiO2 Nanocrystals

“…The sharp absorption edge of pristine TiO 2 can be detected at ∼392 nm, corresponding to the intrinsic large band gap energy of 3.16 eV, and a similar result was also observed in the previous report. 47 The UV−vis diffuse reflectance spectrum of bluish-green Ni(HCO 3 ) 2 is different from those of conventional semiconductor photocatalysts. It displays three regions of absorption edges under light irradiation wavelengths from 200 to 800 nm, and a similar phenomenon was also observed by Parida et al 48 It was found the absorption edge could be divided into three parts: from 200 to 300 nm, from 300 to 500 nm, and from 500 to 800 nm.…”

Anion‐exchange synthesis of hollow BiOCl/Bi 2 S 3 hybrids with superior capability for photocatalytic reduction of hexavalent chromium under visible light irradiation

“…Photocurrent response and EIS were widely used to investigate separation efficiency and charge‐transfer capability of the photoinduced electron and holes in the photocatalyst during the photocatalysis reaction [22, 25]. As shown in Fig.…”

“…All the experiments were carried out in a standard three‐electrode cells containing 0.5 mol/l Sodium Sulfate (Na 2 SO 4 ) aqueous solution with a platinum foil and a saturated calomel electrode as the counter electrode and the reference electrode [22]. The working electrode was prepared according to the following process: 20 mg of as‐prepared sample was mixed with 1 ml of N, N‐Dimethylformamide (DMF) and 0.01 ml of nafion solution (5%, DuPont) to form homogeneous ink.…”