Preparation of NaTaO₃ by Spray Pyrolysis and Evaluation of Apparent Photocatalytic Activity for Hydrogen Production from Water

Table 3

Quantum yield (QY) obtained by (1) and apparent photocatalytic activity (APA) obtained by (2) of several semiconductor photocatalysts for water splitting.

Photocatalyst	Reactor	Reactant volume (L)	H2 (μmol/hr)	Actinometer [light used]	Apparent photocatalytic activity	Ref.
	Lamp	Catalyst (g)	QY (%)		(𝜇mole/g⋅L⋅hr⋅W)
NiO/TiO2	Pyrex cylinder	0.3	600	Potassium ferrioxalate [–]	14.29	Lee et al. (2001) [9]
	700 W High pressure Hg lamp	0.2	12.0
NiOx/RbTaWO6	Quartz reaction cell	0.07	69.7	Spectra radiometer [313 nm]	3.32	Ikeda et al. (2004) [10]
	1 kW superpressure Hg lamp	0.3	1.5
Pt/TiO2-A1 and TiO2-R2	Inner irradiation type reactor	0.5	220	Thermopile power meter [350 nm]	2.75	Abe et al. (2005) [11]
	400 W high pressure Hg lamp	0.4	4.0
NiOx/Ba2In2O5/ In2O3:Cr	Inner irradiation quartz cell	0.5	29.3	−[320 nm]	0.40	Wang et al. (2005) [12]
	400 W high pressure Hg lamp	0.37	4.2
Sr2Nb2O7	Inner irradiation quartz cell	0.35	402	Ferrioxalate Fe(C2O4)3^3− [<300 nm]	2.55	Kim et al. (1999) [13]
	450 W high pressure Hg lamp	1	23
Pt/(AgIn)0.22 Zn1.56S2	Side window Pyrex cell	0.3	944	Photodiode [420 nm]	34.96	Tsuji et al. (2004) [14]
	300 W Xe lamp	0.3	20
NiOy/ In0.9Ni0.1TaO4	Pyrex glass cell	0.25	16.6	−[402 nm]	0.44	Zou et al. (2001) [15]
	300 W Xe lamp	0.5	0.67
NiO/NaTaO3	Inner irradiation quartz cell	0.35	2180	Ammonium ferrioxalate [270 nm]	15.57	Kato and Kudo (1999) [2]
	400 W high pressure Hg lamp	1	28
NiO/NaTaO3:La	Inner irradiation quartz cell	0.39	15000	Ammonium ferrioxalate [270 nm]	96.15	Kudo and Kato (2000) [16]
	400 W high pressure Hg lamp	1	50