Bismuth titanate nanobelts through a low-temperature nanoscale solid-state reaction

摘要: Abstract In this study, an effective low-temperature method was developed, for the first time, synthesis of bismuth titanate nanobelts by using Na 2 Ti 3 O 7 as reactants and templates. The experimental procedure based on ion substitution followed a nanoscale solid-state reaction. step, were soaked in nitrate solution where at nanobelt surfaces led to formation compound overlayer. resulting bismuth-modified then subject calcination process controlled temperatures. At temperature 400 °C, top layer converted Bi whereas interior TiO (B), forming (B)@Bi core–shell nanobelts. When increased 450 °C, metastable interphase 20 32 produced surface structure remained virtually unchanged, now exhibited structure. temperatures higher than 550 °C, shell became 4 12 . even (600–700 °C), no (B) found single-crystalline characteristics that consistent with those Such structural evolution manifested X-ray diffraction, Raman Fourier transform infrared spectroscopic measurements, scanning electron microscopic transmission studies showed belt-like morphology maintained without any apparent distortion or destruction. A mechanism reactions proposed account evolution. Photoluminescence measurements markedly suppressed emission intensity, suggesting impeded recombination photogenerated carriers compared single-phase counterparts. unique feature be beneficiary photocatalysis, exemplified photodegradation methyl orange under UV irradiation, exhibit best performance among series.