1. College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, Guangdong, P. R. China
2. College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, Guangdong, P. R. China
3. School of Chemistry and Environmental Engineering, Hanshan Normal University, Chaozhou 521041, Guangdong, P. R. China