Fabrication of lanthanum and nitrogen – co-doped SrTiO 3 – TiO 2 heterostructured macroporous monolithic materials for photocatalytic degradation of organic dyes under visible light

Fabrication, functionalization and performance of doped photocatalysts for dye degradation and mineralization: a review

“…Heterostructures are created by combining the semiconductor with metals or non-metals which introduces new energy states that help in the separation of photogenerated charges by delocalizing them into different carriers and thus preventing them from recombining with each other (Dutta et al 2015;Ola and Maroto-Valer 2015). For example, Ruzimuradov et al (2017) have fabricated visible light-active lanthanum-and N-co-doped strontium titanate-titanium dioxide heterostructured macroporous monolithic materials having a bicontinuous morphology. Based on the results from X-ray powder diffraction characterization, Ruzimuradov et al (2017) observed that the impregnation of Sr, La and N had effectively delayed phase transformation of titanium dioxide from anatase to rutile and growth of crystallites.…”

A novel n-type CdS nanorods/p-type LaFeO3 heterojunction nanocomposite with enhanced visible-light photocatalytic performance

“…The migration and separation efficiency of photo-generated charge carriers between the two semiconductors in the nanocomposite were extensively investigated by photoluminescence (PL) spectroscopy. [70][71][72][73][74][75][76][77][78][79] PL spectroscopy is a useful technique to survey the separation efficiency of the photogenerated electronhole pairs in semiconductors because the electron-hole recombination's in semiconductors are mainly responsible for PL emissions. 80,81 Actually, the PL emission is a mainly consequence of the recombination of photoexcited electron-hole pairs, and a lower PL intensity indicates a lower recombination rate of photoexcited electron-hole pairs.…”

Fabrication and photocatalytic property of magnetic SrTiO3/NiFe2O4 heterojunction nanocomposites

“…The pure SrTiO 3 exhibits a 385 nm absorption band-edge in the UV region, corresponding to band gap energy of 3.15 eV. 39,40 The pure NiFe 2 O 4 absorption band extends to the whole visible-light region and the absorption peak intensity is more stronger. We also observe that the 15 wt% SrTiO 3 /NiFe 2 O 4 composite has the strongest absorption intensity, which suggests that the integration of SrTiO 3 and NiFe 2 O 4 could promote the photoabsorption ability.…”