Evaluation of the Water-treatment Ability of Silica-doped Titanium Dioxide-coated Glass Plates Using a Cationic Coupling Reagent Based on a Flow Analytical System

Abstract

In this study, a photocatalytic plate bound to highly dispersible silica-doped titanium dioxide (SiT) on a trimethoxysilylpropyldiethylenetriamine (dien)-coated glass plate (dien-plate) was newly synthesized, and was evaluated by a flow analytical (FA) system, which consists of a photocatalytic reactor and a spectrophotometer, to continuously monitor the absorbance of tested chemicals. The method was not required to collect any sample solution at a constant period. The SiT-dien-plate facilitated the photodecomposition of methylene blue (MB) and indigo carmine (InC) in aqueous solutions. Notably, MB was quantitatively photo-decomposed following 18 h of UV-light irradiation, related to the electrostatic adsorption of surface-bound particles. A water-treatment ability of visible-light-responsive vanadium-modified nitrogen/ silica co-doped titanium dioxide fixed on the dien-plate was also evaluated by the FA system. It clarified to decompose MB and InC under visible-light irradiation. Finally, the decomposition of a humic substance dissolved from Middle West China peaty soils by the SiT-dien-plate under UV-irradiation was assessed as applying the FA system with a photocatalytic plate.

Engineered ZnO‐TiO2 Nanospheres for High Performing Membrane Assimilated Photocatalytic Water Remediation and Energy Harvesting

“…[7] Decontamination and regeneration of water via solar energy has emerged as a preferred method among the clean and sustainable form of purifying polluted water. [8][9][10][11] A photocatalytic material is used for the process of decontamination and purification whereby it absorbs sunlight at a specific wavelength creating active species that react with the contaminants resulting in the production of non-toxic output. [10,12] In addition to this, recently, photo-thermal water evaporation with plasmonic interfacial system are used that increases confined heating process.…”

“…[8][9][10][11] A photocatalytic material is used for the process of decontamination and purification whereby it absorbs sunlight at a specific wavelength creating active species that react with the contaminants resulting in the production of non-toxic output. [10,12] In addition to this, recently, photo-thermal water evaporation with plasmonic interfacial system are used that increases confined heating process. Merging solar evaporation with photocatalytic reactions, Liu et al fabricated bi-functional membranes of TiO 2 , Au nanoparticle on anodized aluminum oxide that showed significant decontamination efficiency.…”

Evaluation of Photocatalytic Abilities by Variation of Conductivity and Dimethyl Sulfoxide: Photocatalytically Active TiO2-coated Wire Mesh Prepared via a Double-layer Coating Method

“…1). The FAS-CD system was modified using a spectrophotometer, which was developed according to Sugita et al, 17 to a conductivity detector to monitor the generations of electrolyte in aqueous media during the photocatalytic reaction. Furthermore, sample solutions were collected from the FAS at a constant time and the concentrations of DMSO and its derivatives were determined through ion chromatography (IC).…”

Bioinspired Bifunctional Membrane for Efficient Clean Water Generation

“…One way to battle water shortage is to reuse contaminated water through various decontamination processes, such as purification or distillation. Due to the cleanness and sustainability of solar energy, using solar energy for clean water regeneration has attracted significant attention, and tremendous progress has been reported recently. − …”

“…One promising and widely studied route to use solar energy for the purification of water is decontamination through photocatalytic processes. In the photocatalytic decontamination process, a photoactive material absorbs sunlight and creates highly active species, such as H 2 O 2 , OH • , O 2 •– , and O 3 , which can react with contaminants to produce small nontoxic molecules . Most of the catalysts studied, however, can only be activated by specific ranges of photon wavelengths, while the other wavelengths of the solar spectrum are not efficiently used.…”