Microwave-Assisted Synthesis of Porous ZnO/SnS₂ Heterojunction and Its Enhanced Photoactivity for Water Purification

Table 4

Pseudo-first-order rate constants and the respective chi-square test statistics of the model fit for the photocatalytic transformations of the model pollutants over the as-prepared catalysts.

Pollutant	ZnO		SnS2		ZOSS-1		ZOSS-2		ZOSS-3		mm-ZOSS
	CIP	1.2^b	0.0002	6.2	0.0010	27.2	0.0785	57.1	0.0102	33.3	0.0867	6.8	0.0201
Cr^VI	~0^c	—	6.8	0.0003	NA^d	NA	311.9	0.0020	NA	NA	NA	NA
MB	~0	—	10.9	0.0017	NA	NA	99.4	0.0016	NA	NA	NA	NA

All have units of min⁻¹; ^bsee text for explanation; ^cZnO is a large band gap semiconductor that is not active in visible-light. ^dExperiment not performed.