Yingheng Huang

Thermal degradation kinetics study of curcumin with nonlinear methods

The results of TG/DTG when curcumin was used as the food colouring agent indicated that the processing temperature of the food should not exceed 190°C. The decomposition process of curcumin involved two stages. The results of Eα values, determined by an advanced isoconversional method, showed that the two stages were both single-step processes. The most probable mechanisms of the two stages were estimated by using comparative and nonlinear model-fitting methods. The mechanisms obtained from the two methods are the same, which are the assumed random nucleation and its subsequent growth for stage I and one-dimensional diffusion for stage II, respectively. The values of pre-exponential factor A for both stages were obtained on the basis of Ea and g(α). Besides, some thermodynamic functions (ΔS(≠), ΔH(≠) and ΔG(≠)) of the transition state complexes for the two stages were also calculated.

Strain-Induced Enhancement of Eu3+ Emission in Red Phosphor NaMgPO4:Eu3+, Al3+

A series of (NaMgPO4)0.98−x:

3D nanospherical CdxZn1−xS/reduced graphene oxide composites with superior photocatalytic activity and photocorrosion resistance

{\hbox{Eu}}_{0.02}^{3 + }

The dual charge compensation effect of Na+ ions on the luminescence behavior of red phosphor NaMgPO4:Eu3+

Eu0.023+,

Enhanced photoluminescence and energy transfer in the novel red emitting phosphors SrZn2(PO4)2:Eu3+, Tb3+, Li+

{\hbox{Al}}_{x}^{3 + }

Synthesis of α-Al2O3 platelets and kinetics study for thermal decomposition of its precursor in molten salt

Alx3+ phosphors were prepared by the solid-state method. X-ray powder diffraction results confirm that the samples contain mixture phases of crystals. The doped effect of Al3+ on the photoluminescence properties of (NaMgPO4)0.98−x: