Preparation and photocatalytic activity of nitrogen and carbon co-doped titanium dioxide on degradation of rhodamine B - Nguyen Thi Thien Kieu.; Dao Ngoc Nhiem; Le Thanh Son.; Le Thi Thanh Thuy.; Nguyen Dinh Bang.; Nguyen Minh Phuong; Nguyen Thi Dieu Cam.; Nguyen Thi Lien.; Nguyen Van Noi.