1. Key Laboratory of Optoelectronic Sensing Integrated Application of Henan Province, College of Electronic and Electrical Engineering, Henan Normal University, Xinxiang, Henan 453007, P. R. China
2. Key Laboratory for Yellow River and Huai River Water Environmental and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, School of Environment, Henan Normal University, Xinxiang, Henan 453007, P. R. China