Enhanced Photocatalytic Hydrogen Generation Using Polymorphic Macroporous TaON

Abstract

Macroporous TaON (mac-TaON) is prepared using polymer sphere templating and controlled ammonolysis. In contrast to typical powder synthesis, which gives the β polymorph, mac-TaON is a mixture of β and γ polymorphs. mac-TaON shows twice the activity for photocatalytic hydrogen generation in comparison to mac-TaON when normalised for surface area.

Achievement of visible-light-driven Z-scheme overall water splitting using barium-modified Ta3N5as a H2-evolving photocatalyst

“…SiO 2 , C 3 N 4 ) and surface modification have been made. 32–37 As a result of the poor proton reduction ability, Z-scheme overall water splitting using particulate Ta 3 N 5 as a H 2 -evolving photocatalyst is still not reported.…”

Templated Non-Oxide Sol-Gel Preparation of Well-Ordered Macroporous (inverse opal) Ta3N5 Films

“…16 Ta 3 N 5 inverse opal powders have been obtained by a templated sol-gel synthesis of the porous oxide powder followed by nitridation, and these materials were studied as photocatalysts for water splitting. 6 …”

Ni(OH)2 loaded on TaON for enhancing photocatalytic water splitting activity under visible light irradiation

“…Among them, TaON has a band gap of 2.4 eV and its conduction band (CB) edge locates at around −0.3 V (vs. SHE, pH 0), which is more negative than water reduction potential (0 V vs. SHE, pH 0) [11][12][13]. On account of a narrow band gap and favorable band gap position, TaON has been extensively studied for hydrogen production in the presence of a sacrificial reagent (e.g.…”