A novel photocatalyst PbSb2O6 for degradation of methylene blue

Black strontium titanate nanocrystals of enhanced solar absorption for photocatalysis

“…28,29 The R-STO is demonstrated to exhibit a drastically enhanced photocatalytic hydrogen-generation and photoelectrochemical properties compared with the pristine STO. The introduction of Ti 3+ 3d 1 states and oxygen vacancies into the lattice of SrTiO 3 causes impurity/defect states (oxygen vacancies) in the band gap, resulting in an enhancement in visible and infrared light absorption.…”

“…22,23 It can be found that both STO and R-STO include two broad bands centered in the 200500 and 600800 cm -1 regions, which agree well with the previous studies. 27,28 Therefore, the photocatalytic activity of R-STO would be superior to STO. Four additional peaks at  174 cm -1 , 541 cm -1 , 682 cm -1 and 791 cm -1 in STO belong to the first-order scattering and show an excellent match with the frequencies of TO2, TO4, TO and LO4 phonons, respectively.…”

Efficient red‐emitting phosphor of Eu3+‐activated (Na0.5Gd1.5)(TiSb)O7 derived via cation‐substitutions in Gd‐Pyrochlore

“…For Gd 2− x Na x Ti 2−2 x Sb 2 x O 7 :0.15Eu 3+ ( x = 0), O–2p and Ti–3d form the valence band (VB) and conduction band (CB) (Figure ), respectively . The band structure of cation‐substituted Gd 2− x Na x Ti 2−2 x Sb 2 x O 7 is shown in Figure ; this result was suggested basing from previous references on titanate and antimony semiconductors . The electronic components of Na ions have no contribution to the transition energy of Gd 2− x Na x Ti 2−2 x Sb 2 x O 7 .…”

“…In this study, the hybrid states for the VB and CB were only tentatively proposed on the references because this situation is common in antimony semiconductors. Therefore, the hybrid states in the VB and CB benefit the mobility of photogenerated charges . This state is beneficial to the optical absorption in Eu 3+ ‐doped phosphors because Eu 3+ has a vital drawback, i.e., a very low (<10 −6 ) oscillation strength in the near‐UV wavelength region due to its f – f forbidden transitions.…”

Nanocrystalline GaSbO4 with high surface area prepared via a facile hydrothermal method and its photocatalytic activity study

“…Recently we and others have found that some metal oxides consist of central ion of Sb 5+ , like M 2 Sb 2 O 7 (M = Sr 2+ and Ca 2+ ) [12][13][14], PbSb 2 O 6 [15], BiSbO 4 [16,17] and ZnSb 2 O 6 [18] show photocatalytic activity for the degradation of benzene and organic dyes. All these antimonate-based photocatalysts contain distorted Sb O polyhedra and encourage us to explore the photocatalytic performance of other antimonates with distorted Sb O polyhedra.…”