Tunable Bandgap Engineering of Zn_<i>x</i>Cd_1−<i>x</i>Se Solid Solution with Controlled Ratio via a Facile One‐Pot Synthesis for Visible‐Light Photocatalytic H₂ Production

Metal selenide semiconductors in photocatalysis are limited, owing to their low activity and poor stability. Herein, a facile one‐pot solution approach is developed prepare particulate Zn x Cd 1− Se solid solutions with tunable energy band structures. X‐ray diffractometer (XRD) patterns demonstrate that the crystal structure of samples not changed. The analysis UV–vis photoluminescence spectra exhibits bandgap photocatalysts utilizing oleylamine as an organic template can be accurately controlled, which gradually becomes wider from 1.60 2.70 eV increasing Zn/Cd molar ratio. Under visible‐light irradiation, optimal 0.5 without any cocatalyst superior photocatalytic H 2 generation rate (438.3 μmol h −1 g ), exceeding pristine CdSe ZnSe by more than 12 17 times, apparent quantum yield 1.7% at 420 nm excellent results on account balance between width conduction (CB) potential Se, implying excitation photogenerated electrons faster charge carrier separation efficiency, could substantiated transient photocurrent response electrochemical impedance spectroscopy. Therefore, this work provides straightforward strategy synthesize metal for diverse applications.