Synthesis of TiC@C-anatase/rutile@polyvinyl alcohol/xylan: a powerful photocatalyst for degradation of organic pollutant under visible light

Abstract

In this study, a composite bearing titanium carbide (TiC), titanium dioxide (TiO 2 ), polyvinyl alcohol and xylan (TiC@C-anatase/rutile@polyvinyl alcohol/xylan) was synthesized and applied as a photocatalyst for the degradation of bromophenol blue (BPB) solution through several steps. Nanostructure of TiC and TiO 2 in the anatase and rutile phases was obtained through heat treatment of TiC at different times and temperatures (TiC@AR) which led to a reduction in energy bandgap from UV to visible light, in addition to the enhancement of the surface activity. After TiC@AR polymerization by xylan and polyvinyl alcohol and obtaining TiC@AR/PX, the energy bandgap reduced to IR range (52% of the sunlight) while showing an enhancement in the surface activity. The photocatalytic activity of the compounds was tested by studying the decomposition of BPB solution under visible light. The result illustrated the ability of TiC and TiC@AR to decrease the concentration of BPB after 150 min by 35% and 37%, respectively, while this reduction was 72% for TiC@AR/PX. Considering the effective parameters, the energy bandgap and the surface layer played key roles in photocatalytic degradation.

Unveiling the Mechanisms of Enhanced Photocatalysis: A Comprehensive Study on Metal–Organic Framework Encapsulation Strategies and the Synthesis of Pt@MOF for Efficient C–N Coupling Reactions

“…This discrepancy highlights that a photocatalyst’s efficiency is not solely dependent on its platinum content despite its renowned catalytic capabilities. Instead, efficiency is influenced by numerous references factors including surface area, light absorption, the presence of catalytic centers for producing specific species, and the recombination of electrons. , Pt 2–2 @MOF outperformed Pt 3–3 @MOF across these critical parameters, underscoring the significance of not just the quantity of catalytic material but also the quality of the photocatalyst’s design and the synergy among its components. The superior performance of Pt 2–2 @MOF can be attributed to its optimized integration of key elements such as 2-aminoterephthalic acid, the Ti ion, and the Pt complex.…”

“…Instead, efficiency is influenced by numerous references factors including surface area, light absorption, the presence of catalytic centers for producing specific species, and the recombination of electrons. 29,30 Pt 2−2 @MOF outperformed Pt 3−3 @MOF across these critical parameters, underscoring the significance of not just the quantity of catalytic material but also the quality of the photocatalyst's design and the synergy among its components.…”