Study on the effect of reaction temperature to photocatalytic hydrogen production activity
Xi, Hao (2022)
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:amk-2022060716091
https://urn.fi/URN:NBN:fi:amk-2022060716091
Tiivistelmä
Energy is vital to humanity, and the problems of energy shortage and environmental protection have become increasingly severe in recent years. To solve these problems, the development of new energy sources is receiving more and more attention. Quantum dots have been widely studied as photocatalysts capable of harnessing solar energy. Still, the current quantum dots have the drawbacks of low efficiency of photocatalytic hydrogen production and low efficiency of visible light utilization. To find the factors affecting photocatalysis, especially the effect of temperature on photocatalytic activity, Ag-ZnIn2S4 photocatalysts were synthesized, and varying temperatures in this experiment characterized their photocatalytic activity. The electron sacrifices and concentrations used for testing were also determined by adding different electron sacrifices and concentrations of Ag-ZnIn2S4 photocatalysts.
The photocatalytic hydrogen production experiments at different temperatures revealed that the photocatalytic activity of Ag-ZnIn2S4 photocatalyst decreased after 30 °C while the photocatalytic activity of InP/ZnS photocatalyst increased consistently from 10 °C to 50 °C. This result is probably due to the ability of Ag-ZnIn2S4 to tolerate high temperatures, which is less stable than InP/ZnS. When constructing a photocatalytic hydrogen production system, studying the stability of the photocatalyst used in advance can improve the efficiency of photocatalytic hydrogen production.
The photocatalytic hydrogen production experiments at different temperatures revealed that the photocatalytic activity of Ag-ZnIn2S4 photocatalyst decreased after 30 °C while the photocatalytic activity of InP/ZnS photocatalyst increased consistently from 10 °C to 50 °C. This result is probably due to the ability of Ag-ZnIn2S4 to tolerate high temperatures, which is less stable than InP/ZnS. When constructing a photocatalytic hydrogen production system, studying the stability of the photocatalyst used in advance can improve the efficiency of photocatalytic hydrogen production.