Abstract
BackgroundTo enhance the photocatalytic performance of commercial titanium dioxide (P25), carbon quantum dots (CQDs) and NH2−MIL-125 were utilized to address its limitations arising from the large bandgap and small specific surface area. The CQDs were employed to broaden the range of solar light absorption, while NH2−MIL-125 was used to disperse P25 with a higher specific surface area. MethodsA facile reflux method was conducted to synthesize CQD/P25/NH2−MIL-125 composite materials. The up-conversion photoluminescence (UCPL) effect of CODs was leveraged to convert longer wavelengths of light into shorter ones, facilitating P25 and NH2−MIL-125 to enhance photocatalytic performance. Significant findingsThe UCPL effect of CQDs not only broadened the light absorption range but also retarded the recombination of photo-induced electron-hole pairs, leading to improved photocatalytic reactions. Furthermore, the effect of additional amounts of CQDs was investigated, and it was found that 1wt% CQDs/P25/NH2−MIL-125 followed first-order kinetics, with the highest rate constant (k1) of 0.0141.
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