Fig. 1. XRD spectra of Eu3+-doped ZMO. (a) Thermal annealing treatments at different temperatures; (b) comparison between spectra before thermal annealing and after thermal annealing of 2 h at 200 ℃ temperature

Fig. 2. SEM images of Eu3+-doped ZMO precursor after thermal annealing at different temperatures. (a) 200 ℃; (b) 400 ℃; (c) 600 ℃; (d) 800 ℃

Fig. 3. Experimental results of Eu3+-doped ZMO. (a) TG curve; (b) DSC curve

Fig. 4. PL spectra of Eu3+-doped ZMO after thermal annealing of 2 h at different temperatures. (a) 200 ℃; (b) 400 ℃; (c) 600 ℃; (d) 800 ℃

Fig. 5. CIE chromaticity diagram of color of PL from Eu3+-doped ZMO after thermal annealing at different temperatures

Fig. 6. Experimental spectra of Eu3+-doped ZMO after sintering of 2 h at 600 ℃. (a) EDX spectrum; (b) PL excitation spectrum

Fig. 7. Absorption spectra of undoped and Eu3+-doped ZMO nanosheets

Fig. 8. Semi-log graph of PL attenuation curve of Eu3+-doped ZMO nanosheet excited by 375 nm laser at room temperature. (a) Emission wavelength of 550 nm; (b) emission wavelength of 615 nm