Enhanced photoelectrochemical performances in photocatalytic pollutant degradation and water splitting by direct Z-scheme Bi2Sn2O7/TiO2 NTAs

Enhanced photocatalytic degradation of tetracycline by a H2O2-assisted Bi3NbO7/Bi2Sn2O7 composite under visible light

“…5(c and d). Both BNO and BSO are n-type semiconductors with flat-band potentials of À0.73 eV and À0.9 eV (vs. Ag/AgCl, pH = 7), 30,33 respectively. While the flat-band potential of n-type semiconductors is more positive (about 0.1 eV) than the conduction band (CB) potential, the potential of CB (E CB ) values of BNO and BSO are À0.83 eV and À1.0 eV (vs. Ag/AgCl, pH = 7).…”

“…28 Bismuth stannate Bi 2 Sn 2 O 7 (BSO), a pyrochlore-type stannate, has attracted great attention in the field of photocatalysis due to its crystal structure with a corner-sharing octahedral network, which can promote the migration of charge carriers. 29,30 Even so, the basic problems of easy recombination of photogenerated carriers and low utilization of sunlight still remain. Thus, it must be modified to expand the spectral response of the photocatalyst and to improve the charge carrier separation efficiency.…”

Fabrication and research of bi-functional CuNi2S4 nanosheets decorated TiO2/CuNi2S4 heterojunction photoanode for photoelectrochemical water splitting

“…[22,23] Since Fujishima and Honda first used TiO 2 as photoan-ode in 1972, it has been found that titanium dioxide had excellent electronic and optical properties under ultraviolet irradiation. [24][25][26][27] With the extensive and in-depth research on titanium dioxide by scientists, titanium dioxide has been found to have a variety of morphologies, such as nanotubes (NTs), [28] nanorods (NRs), [29] nanosheets (NSs), [30] nanospheres (NSPs), [31] and nanowires (NWs). [32] Compared with other TiO 2 nanomaterials, one-dimensional, highly ordered TiO 2 nanotube arrays structure not only has a larger internal surface area, but also has a very strong adsorption capacity.…”