Table 1. Semiconductor–Semiconductor Heterostructures Reported as Catalysts for Photodegradation of Methyl Orange.

no	heterostructure (g)	MO (mg/L)	efficiency (%)	refs
1	TiO2–BiOBr (0.2)	10	90	Wang et al., 201548
2	TiO2–MoS2 (0.05)	20	97	Zhang et al., 201549
3	Ag2O–Ag3PO4 (0.05)	50	100	Wang et al., 201350
4	SnOX–Zn2SnO4 (0.1)	20	83	Wang et al., 201751
5	C3N4–Bi5Nb3O15 (0.1)	15	94	Zhang et al., 201352
6	SnS2–TiO2 (0.1)	2	92	Dai et al., 201853
7	β-Bi2O3-α-Bi2O3 (0.2)	4	95	Hou et al., 201354
8	Bi2O3–BiOI (0.1)	2	95	Han et al., 201555
9	BiOI–BiOBr (0.1)	10	63	Cao et al., 201156
10	TiO2-β-anatase (0.02)	5	100	Zhang et al., 201357
11	In2.77–S4–SrCO3 (0.02)	5	100	Wu et al., 201858
12	ZrO2–MoS2 (0.05)	10	95	Prabhakar Vattikuti et al., 201659
13	Bi12TiO20-g-C3N4 (0.2)	20	90	Cao et al., 201960
14	Bi2MoO6–Bi5O7Br–TiO2 (0.2)	16	47	Wang et al., 202061
15	WO3-g-C3N4 (0.1)	10	93	Yan et al., 201962
16	LaNiO3/TiO2 (0.1)	20	92	Chen et al., 202063
17	ZnFe2O4–SnS2 (0.1)	50	99	Zhou et al., 202064
18	Ag2Mo1–xWxO4 (0.05)	5	45	Andrade Neto et al., 202065
19	Co3O4-g-C3N4 (0.1)	10	99	Han et al., 201466
20	Co–ZnO (0.05)	100	93	this study
		200	60
		300	54