Table 2. Main Instrument and Equipment Used in the Experiment.

name	manufacturer	model	accuracy
thermostatic water bath oscillator	Julabo Labortechnik GmbH	SW23	0.02 K
immersion magnetic stirrer	Julabo Labortechnik GmbH	CR40215
ultrapure water machine	Sichuan Youpu Ultrapure Technology Co., LTD.	UPL-H/U
electronic analytical balance	Sartorius Scientific Instruments (Beijing) Co., LTD.	BSA124S	0.0001 g
X-ray diffractometer	PANalytical B.V.	X-Pert PRO
ICP-OES spectrometer	PerkinElmer Co., Ltd	PE Avio 200