1. National Local Joint Laboratory of Engineering Application of Microwave Energy and Equipment Technology, Kunming, 650093 Yunnan, China
2. Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, 650093 Yunnan, China
3. Fine Chemical Industry Research Institute, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275 Guangdong, China