Busabok, Chumphol, Wasana Khongwong, and Piyalak Ngernchuklin. “Simple Method to Synthesize g-C3N4 Doped Sn to Reduce Bandgap Energy (Eg)”. Suan Sunandha Science and Technology Journal 9, no. 2 (November 17, 2022): 63–70. accessed June 13, 2025. https://li02.tci-thaijo.org/index.php/ssstj/article/view/235.