Abstract
A low-temperature process to synthesize and print photoactive TiO2 nanofilms onto polymeric substrates using a modified desktop inkjet printer is presented. The coated substrates were assembled in ...
Highlights
Photocatalysis is a developing branch of heterogeneous catalysis with numerous applications mainly in air and water pollutant treatment.[1,2] This technology is considerably effective in removing different types of contaminants compared to conventional treatment methods such as ozonolysis and chlorination.[3,4] In photocatalytic reactions, UV/vis light absorption generates pairs of electrons−holes on the surface of the catalyst
The T-sol particles are smaller in size, and the ink was prepared directly from the TiO2 sol which may cause the higher colloidal stability
A simple, low-cost manufacturing approach using laser cutting and transmission laser welding methods was used to build the reactor, while inkjet printing was used for deposition of tunable TiO2 catalyst films on polypropylene substrate
Summary
Photocatalysis is a developing branch of heterogeneous catalysis with numerous applications mainly in air and water pollutant treatment.[1,2] This technology is considerably effective in removing different types of contaminants compared to conventional treatment methods such as ozonolysis and chlorination.[3,4] In photocatalytic reactions, UV/vis light absorption generates pairs of electrons−holes on the surface of the catalyst. Dispersed catalysts must be filtered in downstream or from the reactor medium after each cycle.[12] Many attempts have been made to fix the photocatalytic particles in continuous reactor systems such as using optofluidic devices or coated microchannels manufactured on ceramics, glass, or silicon.[13,14] Despite the significant progress of coating techniques in macro- and microfluidic devices, there are still limitations due to complex fabrication procedures and low performance.[15] Conventional deposition methods such as dip-coating and spin-coating suffer from producing large waste of materials and low capability in patterning and film thickness control.[16] Other alternatives like lithography and vacuum deposition involve costly multistep processing at elevated temperatures.[17]. Surface tension, and density are necessary to characterize the droplet formation, the printability depends on the nozzle diameter and jetting conditions. The overall characterization and kinetic studies were performed on the synthesized TiO2 and commercial TiO2 nanopowders
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