| Demand for energy is more and more urgent in today’s society, however, Energy shortages and environmental degradation are increasingly prominent. Converting solar energy into heat energy, electrical energy, chemical energy is an important way to solve the energy problem. As a kind of solar fuel, hydrogen peroxide can make it pollution-free throughout the process of source of energy, conversion and final product. Hydrogen peroxide is also a versatile clean oxidant that is widely used for pulp bleaching, wastewater treatment, disinfection, and organic synthesis. At present, the design of effective photocatalyst for production of hydrogen peroxide clean and safe is still full of challenging.This work developed a non-noble metal photocatalyst with the interaction of double metal oxide or metal hydroxide with other materials. The core content in this article is:Composite precursor was obtained by simple hydrothermal reaction, and the composite was successfully obtained by the calcination of the precursors. The mixed metal oxide or carbon nitride alone cannot produce hydrogen peroxide in water system, however the mixed metal oxide/carbon nitride composite material photocatalyst facilitates highly efficient production of H2O2. The yield of H2O2 at 3h can reach 67 μmol/L. It is ascribed to the positive shift of the position of conduction band and valence band after the combination of MMO and carbon nitride. The position shift of conduction band can still carry out oxygen reduction reaction, and the position shift of valence band makes it more easy to carry out water oxidation reaction to produce hydrogen proton (H+) successfully, and producing hydrogen peroxide (H2O2) further. This work opens up a promising way to design the composite structure of photocatalysts for production of hydrogen peroxide high-efficiency and low-cost. |
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