Enhanced nitrogen photofixation on Fe-doped TiO2 with highly exposed (101) facets in the presence of ethanol as scavenger

Direct microwave–hydrothermal synthesis of Fe-doped titania with extended visible-light response and enhanced H2-production performance

“…Moreover, Castro-López et al [26] found that the sol-gel process increases the number of Fe atoms that serve as recombination centers for photo-induced electrons and holes, thereby reducing photoactivity. Our previous study [27] on Fe-doped TiO 2 prepared by a two-step hydrothermal method also demonstrated that when the Fe doping concentration exceeded 0.01%, the recombination rate was enhanced and the temporary photo-induced electrons observed in hole-trapping sites disappeared, resulting in a decrease in photoactivity.…”

“…As reported in our previous study [27], an electrochemical workstation (CH instruments 650D, China) with a three-electrode system was used for photoelectrochemical (PEC) experiments, which were carried out in conjunction with electrochemical impedance spectroscopy (EIS). A Mott-Schottky (MS) plots and an i-t curve for photocurrent transient responses were generated as well.…”

In situ construction of Z-scheme g-C3N4/Mg1.1Al0.3Fe0.2O1.7 nanorod heterostructures with high N2 photofixation ability under visible light

“…[7][8][9] In recent years, many novel nitrogen-photoxation catalysts are reported successively, including BiOBr (BiOCl), g-C 3 N 4 , multi-metal sulde and FeMoS-Chalcogels. [10][11][12][13][14][15][16] The details of their nding are shown in Table 1. However, compared with the photocatalytic H 2 production, N 2 photoxation is more challenging because of the hard formation of high-energy N 2 intermediates (N 2 À or N 2 H) during the N 2 photoxation process.…”

“…For these experiments, 0.2 g of photocatalyst was added to a 500 mL 0.789 g L À1 ethanol as a hole scavenger. 11 The suspension was dispersed using an ultrasonicator for 10 min. During the photoreaction under visible light irradiation, the suspension was exposed to a 250 W high-pressure sodium lamp with main emission in the range of 400 to 800 nm, and N 2 was bubbled at 100 mL min À1 through the solution.…”

“…11 The nitrogen photoxation experiments were performed in a double-walled quartz reactor in air. For these experiments, 0.2 g of photocatalyst was added to a 500 mL 0.789 g L À1 ethanol as a hole scavenger.…”