Protonation and Photocatalytic Activity of the Rb₂La₂Ti₃O₁₀ Layered Oxide in the Reaction of Hydrogen Production

Table 1

Characteristics of obtained Rb₂La₂Ti₃O₁₀ samples S0, S1, S2, and S3: interlayer distance, protonation degree measured by TG and X-ray microanalysis, intercalated water content, and BET surface area.

	Space group	Interlayer distance (Å)	Substitution degree of K^+ with H^+ (%)		Amount of intercalated water per formula unit	Optical band gap (eV)	BET surface area (m^2/g)
			TG	X-ray microanalysis
S0	I4/mmm	15.23	—	0	0	3.60	1.4
S1	C222	16.26	0.48	0.52	0.82	3.65	7.1
S2	P4/mmm	14.90	0.68	0.76	0.54	3.58	7.8
S3	C222	13.72	0.95	0.97	0.16	3.55	8.1