A visible light induced, highly oxidative, and highly reductive photocatalyst. The photocatalyst includes a first semiconductor with a bandgap between valence band and conduction band thereof between 2.0 eV and 3.0 eV, and second semiconductor, combined with the first semiconductor, with a bandgap between valence band and conduction band thereof between 2.0 eV and 3.0 eV. The conduction band of the first semiconductor is negative relative to that of H2/H2O with a difference of 0.2 eV or greater. The valence band of the second semiconductor is positive relative to that of H2/H2O with a difference of 2.8 eV or greater.
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机译：可见光诱导的，高氧化性和高还原性的光催化剂。光催化剂包括在价带和导带之间的带隙在2.0eV和3.0eV之间的第一半导体，和与第一半导体结合的在价带和导带之间的带隙在2.0eV和3.0eV之间的第二半导体。相对于H 2 / H 2 O，第一半导体的导带为负，且差为0.2 eV或更大。第二半导体的价带相对于H 2 / H 2 O的价带为正，相差2.8 eV或更大。
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