Immobilization of TiO2 Photocatalyst Particles on Stainless Steel Substrates by Electrolytically Deposited Pd and Cu

Abstract

A novel process to immobilize oxide particles with electrolytically deposited metals as binders was proposed. Commercial TiO 2 photocatalyst particles, P25, were successfully immobilized on the surface of stainless steel substrates with Pd and Cu by this process. The effects of the conditions of electrolysis and the composition of the source solutions on the amount and the morphology of the particles accumulated on the surface were investigated. Addition of another particle with superior dispersibility, NanoTek, and sonication during electrodeposition were important to inhibit agglomeration of the particles and to achieve uniform and dense immobilization. Photocatalytic activity, which was evaluated by photobleaching of methylene blue solution, of the immobilized particles was as high as 50ಚ of the particles suspended in the solution.

Effectiveness of a photocatalytic organic membrane for solar degradation of methylene blue pollutant

“…This problem has become a limiting factor in practical application of the technology [19,20]. To avoid secondary pollution, much effort has been devoted to immobilizing TiO 2 on a variety of substrates [21], including glass [22,23], stainless steel [24], carbon fiber [25], titanium substrate [26,27], and polymers [28,29], by means of sol-gel method, thermal treatment, chemical vapor deposition (CVD), and electrophoretic deposition.…”

Immobilization of TiO2 nanoparticles in polymeric substrates by chemical bonding for multi-cycle photodegradation of organic pollutants

“…Nevertheless, the filtration to eliminate and recycle the powdered TiO 2 suspended in the treated water increases running cost and induces the secondary pollution, which has become a main limiting factor for practical application [9,10]. Alternatively, to solve the problem, many efforts have been devoted to immobilizing TiO 2 nanoparticles on a variety of substrates [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25], such as glass [17,18], stainless steel plate [19], carbon fiber film [20], TiO 2 substrate [21,22] and polymers [23,24], by means of sol-gel method, thermal treatment, chemical vapor deposition (CVD) and electrophorectic deposition. And the adherences between substrates and TiO 2 nanoparticles are often focused on the physical adsorption [20], electrostatic interaction [24], hydrogen bonding interaction [26] and chemical bonding interaction.…”

Visible Light Photocatalysts Based on Manganese Doped TiO2 Integrated Within Monolithic Reduced Graphene Oxide/Polymer Porous Monolith

“…The lack of robustness in such case leaded towards development of a slurry reaction system, with low practical importance due to increased costs and additional pollution during catalyst purification . In order to resolve these problems, TiO 2 nanosized catalysts were immobilized onto various substrates, including polymers, glass, stainless still, ceramic plates, cellulose, or aerogels etc. These substrates offer an optimization of the photocatalyst surface area and a preservation of the photocatalytic activity in various cycles .…”