Table 5.

Metal selenide-based nanomaterial in wastewater remediation

Nanomaterial	Contaminant	Mechanism	Sorption/catalytic capacity	Conditions studied			Cycles	References
				pH	Time	Temp °C
Iron-bismuth selenide chitosan microspheres	Crystal violet	Photocatalytic degradation	98.95%	8	150		4	[469]
Selenium-functionalized metal–organic framework MIL-101 Se/MIL-101	Mercury	Sorption	148.19 mg/g		90			[470]
Copper selenide-functionalized polyurethane sponge Cu2Se/PUS	Mercury	Sorption	25.90 mg/g					[471]
CdSe (cadmium selenide)-decorated graphene composites coupled with TiO2 (titanium oxide)	Methyl orange	Photocatalytic degradation	85%		180		4	Ghosh et al. [472]
	Rhodamine B
Selenized magnetic nanoparticles (Fe3O4−xSey)	Mercury	Sorption	98.1%		120	100	10	[473]
Nanosized copper selenide	Mercury	Sorption	210.8 mg/g		90	50		[474]
CuSe/ZIF-8	Mercury	Sorption	309.8 mg/g		240	50		[475]
Selenide-coated copper (Cu2Se-Cu)	Mercury	Sorption	100%		120	60		[476]
Molybdenum selenide nanosheets	Mercury	Sorption	1000 mg/g					[477]
Amorphous molybdenum selenide intercalating magnetite [MoSex(inter)Fe3O4]	Mercury	Sorption	100%		240		10	[478]
Marcasite-type metal selenides (MSe2)	Mercury	Sorption						[479]
Zinc selenide sulphide composite ZnSe0.7S0.3	Mercury	Sorption	99%		120	150		[480]
Selenide-functionalized mineral sulfide xSe-FeS	Mercury	Sorption	87%		120	90	4	[481]
C fibers@MoSe2 nanoplate core–shell composite	Methylene blue	Photocatalytic degradation			80			[482]
	Rhodamine B
	p-Chlorophenol (4-CP)
	Potassium dichromate
Amorphous MoSex	Rhodamine B	Photocatalytic degradation	96.7%		120			[483]
	Methylene blue		98.9%
MoSe2/TiO2 nanofibers	Rhodamine B	Photocatalytic degradation					3	[484]
	Tetracycline hydrochloride
	K2Cr2O7
Copper selenide	2-Chlorophenol	Photocatalytic degradation	100%					[485]
CuSe nanoparticles	Methylene blue	Photocatalytic degradation	76%		720	90		[486]
	Rhodamine B		87%