Graduate Institute of Environmental Engineering, NTU

School of Chemical Sciences, Universiti Sains Malaysia

Renewable Energy and Energy Efficiency Group, The University of Melbourne

Kyungpook National University, Department of Environmental Engineering

Shanghai Jiao Tong University

Nanyang Technological University

Department of Pure and Industrial Chemistry, Bayero University Kano-Nigeria.

Zhejiang Sci-tech University

Visvesvaraya Technological University