1. Centre for Advanced Materials and Environmental Research, Mahanakorn University of Technology, Bangkok 10530, Thailand
2. The Petroleum and Petrochemical College, Chulalongkorn University, Bangkok 10330, Thailand
3. Nanotec-KMUTT Center of Excellence on Hybrid Nanomaterials for Alternative Energy, King Mongkut's University of Technology Thonburi (KMUTT), Thonburi, Bangkok 10140, Thailand