Parameters of NCPs for different molar ratios.

Samples	Oxides	Average crystalline size D (nm)		Dislocation density δ × 10−3	Lattice strain ε × 10−3
		Scherer method	W–H plot method
ZNC-(1 : 1 : 1)		21.51	18.88	3.13	0.91
	ZnO	26.54	58.99	1.78	0.76
	NiO	16.42	15.51	3.77	1.2
	CuO	18.23	15.99	4.83	0.78
ZNC-(2 : 1 : 1)		27.91	33.16	1.84	0.72
	ZnO	32.63	353.83	1.25	0.66
	NiO	24.05	47.79	1.92	0.96
	CuO	24.91	18.93	2.93	0.60
ZNC-(1 : 2 : 1)		23.03	42.78	4.38	1.11
	ZnO	31.76	110.88	2.06	0.78
	NiO	12.41	35.81	7.30	1.90
	CuO	21.83	15.10	5.16	0.78
ZNC-(1 : 1 : 2)		20.23	15.77	7.04	1.28
	ZnO	22.39	18.49	8.90	1.47
	NiO	19.48	27.45	2.71	1.13
	CuO	11.43	10.86	12.97	1.23