Photocatalytic overall water splitting on isolated semiconductor photocatalyst sites in an ordered mesoporous silica matrix: A multiscale strategy

Crystallization of well-defined anatase nanoparticles in SBA-15 for the photocatalytic decomposition of acetic acid

“…The light harvesting to the anatase nanoparticles is thought to be enhanced by the multiple light reections in the pore channels. 52 The light scattering may be difficult to be avoided due to the surface roughness of the SBA-15 particles seen in the SEM image ( Fig. 2(B)).…”

Suppressing the Photocatalytic Activity of Titania by Precisely Controlled Silica Coating

“…The improved photon absorption by the interface formed between porous silica and semiconductor or the molecular sieving function of porous silica has been reported to enhance the photocatalytic overall water splitting. 23,24 To suppress the photocatalytic decomposition, ST-21@silica was heated in air at different temperatures to reduce the porosity of the silica layer. The samples are designated as ST-21@silica-HX, where X is the temperature of the heat treatment.…”

“…The porous silica layer was reported to play a role to concentrate MB, leading to the acceleration of the decomposition. ,, The effects of porous silica coating on the function of titania have been reported for overall water splitting reaction. The improved photon absorption by the interface formed between porous silica and semiconductor or the molecular sieving function of porous silica has been reported to enhance the photocatalytic overall water splitting. , …”

“…The surface modification of semiconductor photocatalysts has been done to modify the activity of the photocatalysts, to accelerate the reaction by the modification of the affinity to reactants, to enhance the photon absorption ability and prevent the fouling, to impart molecular recognition by molecular sieving effects of porous silica, and to suppress the reactivity by covering the surface to block the reactant access. − When TiO 2 is used as UV absorbing pigment in paints, chalking and color fading of paints are caused by the photocatalytic activity of TiO 2 even by the sunlight. , The formation of reactive oxygen species, which is harmful to human skin, by a UV absorber (TiO 2 ) is pointed out for the sunscreen application. − Thus, the photocatalytic activity of TiO 2 is required to be suppressed for such applications as paints and cosmetics. Heteroelement doping − and coating of TiO 2 particles with aluminum oxide, tin oxide, and silicon dioxide have been reported for suppressing the photocatalytic activity of TiO 2 particles. − To suppress the photocatalytic activity more precisely, it is important to develop efficient coating protocols for uniform and perfect coverage to completely block the particle surface from accessing of the reactants.…”

In-situ pressure-induced BiVO4/Bi0.6Y0.4VO4 S-scheme heterojunction for enhanced photocatalytic overall water splitting activity

“…Photocatalytic reactions were carried out in a Pyrex reaction cell connected to a closed gas circulation and evacuation system, as reported previously [31]. Rh@Cr2O3 was loaded onto BYV through photodeposition [11], using loading amount of 1 wt% for both Rh and Cr.…”