Copper doped titanium dioxide as a low-cost visible light photocatalyst for water splitting Authors Vu Thi Quyen, Kim Jitae, Pham Thi Huong, Le Thi Thu Ha, Dang My Thanh, Nguyen Minh Viet, Phan Quang Thang Publication year 2021 Index (WoS/Scopus) WoS Publisher Elsevier Journal Solar Energy Link https://doi.org/10.1016/j.solener.2021.02.036