Glucose precursor carbon-doped TiO2 heterojunctions for enhanced efficiency in photocatalytic reduction of carbon dioxide to methanol

摘要: Abstract An alternative source for carbon-doped TiO2 photocatalysts, synthesized with glucose as precursor, calcined and tested the reduction of CO2 have been investigated. These samples are characterized using XRD, FTIR, DRUV-Vis, XPS HR-TEM. Glucose 6 wt.% loading (6C-TiO2) corresponds to optimum amount carbon doped into achieving a methanol yield 19.5 mmol gcat−1 h−1, more than 2-fold increase from that bare at 9.5 mmol gcat−1 h−1. Moreover, quantum increases by ca. 50% compared TiO2. From results, various surface species C OH, O functional groups confer association ligand-metal-charge-transfer (LMCT) complex between carbon. The low band gap UV–vis light absorption capacity facilitates transfer photo-generated electrons. 6C-TiO2 demonstrates high photostability constant even after five cycles testing. mechanism in is postulated be consistent LMCT phenomena. Therefore, photocatalyst provides heterojunction localization electrons, hinders charge recombination rate narrows enhanced photocatalytic activity under UV-VIS irradiation.