A porous nanoparticle film composed of Cd0.5Zn0.5S and TiO2 was constructed on Ti plate using screen printing technology. Based on this, the photocatalytic activity of the film for the degradation of methyl orange in a simulated flow bed was investigated. The results showed that the prepared photocatalytic system exhibited high photocatalytic activity for the degradation of methyl orange in water. Additionally, it demonstrated good flexibility and mechanical stability, was easy to recover, and could be used on various carriers with complex shapes. This suggests that the system has promising application prospects in large-scale organic wastewater treatment in the future.
Nano-photocatalytic suspension systems have been a research hotspot. However, we found that there existed a problem of insufficient light penetration distance in this system. In this paper, we explored immobilization of CdS/SrWO4 nanoparticles on nano-cellulose to prepare a photocatalyst which can float on water and be easily separated. Next, its application in the photocatalytic H2 generation was studied deeply. From the results above, we can conclude that the as-prepared sample possesses satisfactory photocatalytic activity for H2 evolution. In addition, the process of separating the photocatalyst from the reaction system and converting into a high quality catalyst film on a solid substrate is easy. This indicates that our immobilization technique is promising and may be extended to the immobilization of other catalytic systems.
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