“…Following the sulfurization process and Zn(III) ion exchange, QDs@M- t -Zn exhibits increased visible light absorption between 400 and 800 nm in wavelength. Based on the Tauc plots formula, the band gap energies ( E g ) can be derived as (α h ν) n = A ( h ν – E g ), where h is the Planck constant, ν is the frequency vibration, and A is the proportionality constant . ZAIS, MIL-68(In), QDs@MIL-68(In), and QDs@M- t -Zn all had direct transition characteristics; hence, n = 2 was chosen for the samples. , Based on that, the replotted curves of (α h ν) 2 versus the light energy ( h ν) are displayed in Figure S8b–i and Figure S9b–d, and the band gap energies of ZAIS, MIL-68(In), QDs@MIL-68(In), and QDs@M- t -Zn are determined to be 2.01, 3.98, 3.91, 2.38, 2.36, 2.35, 2.33, 2.35, and 2.36 eV, respectively.…”