Robust Hydrogen Production via Pickering Interfacial Catalytic Photoreforming of n-Octanol-Water Biphasic System

Abstract

Pickering emulsion offers a promising platform for conducting interfacial reactions between immiscible reagents; it is particularly suitable for hydrogen production by photoreforming of non-water soluble biomass liquid and water. Herein, Pt-promoted (001)-facet-dominated anatase TiO2 nanosheets were synthesized by a hydrothermal route associated with microfluidic technology for high activity and metal dispersion, and selective surface modification was carried out for preparing Janus particles. Photoreforming hydrogen production through n-octanol and water that formed O/W microemulsion with an average diameter of 540 µm was achieved to obtain amphiphilic catalyst. The as-prepared 2D Janus-type catalysts exhibited remarkably stable emulsification performance as well as photocatalytic activity. This finding indicates that triethoxyfluorosilane had negligible impact on the catalytic performance, yet provided a remarkable benefit to large specific surface area at microemulsion interface, thereby enhancing the H2 yield up to 2003 μmol/g. The cyclic experiments indicate that the decrease in cyclic performance was more likely to be caused by the coalescence of the microemulsion rather than the decrease in catalytic activity, and the microemulsion could be easily recovered by simply hand shaking to more than 96% of the initial performance.

Research progress, trends, and updates on pollutants removal by Bi2WO6-based photocatalysts under visible light irradiation

“…The evolution and development of a discipline should be based on the existing knowledge. According to the citation records of articles in the WoS database, the discipline evolution of the research field can be well understood [ 51 ]. The vein diagram of the reference relationships in the field of Bi 2 WO 6 -based photocatalysts showed citing articles and cited articles ( Fig.…”

Amphiphilic Janus Particles for Aerobic Alcohol Oxidation in Oil Foams

“…49 In contrast, JPs with catalytic centers located on their hydrophilic hemispheres can promote dye decomposition 50−53 splitting. 54,55 JPs can also be employed to design interfacial catalysts with spatially isolated acid and basic centers, promoting acid−base tandem reactions. 56 Despite the significant progress in using JPs to stabilize emulsions, their potential for generating foams has been seldom explored.…”

“…Janus particles (JPs) are a class of anisotropic colloidal particles that possess different chemical compositions (and opposing wettability) on each hemisphere. − This amphiphilic nature allows JPs to adsorb much more strongly at the water–oil interface (up to a 3-fold increase in detachment energy) compared to randomly functionalized counterparts due to much lower liquid–particle surface tensions. − As a result, JPs can generate emulsions where interfacial particle self-assembly, orientation, and droplet morphology are governed by the type and density of functional groups on each hemisphere, and by the particle shape and architecture (e.g., spherical, cubic, icosahedral, nanosheets, dumbbell, mushroom-like). − These properties make JPs excellent candidates for engineering biphasic catalytic reactions at the water–oil interface, by carefully locating catalytic centers on either the water or oil sides of the interface. , JPs with catalytic centers located on their hydrophobic hemispheres are suitable for reactions in oil phases, including organic synthesis − and desulfurization . In contrast, JPs with catalytic centers located on their hydrophilic hemispheres can promote dye decomposition − and photocatalytic water splitting. , JPs can also be employed to design interfacial catalysts with spatially isolated acid and basic centers, promoting acid–base tandem reactions …”

Research progress, trends, and updates on pollutants removal by Bi2WO6-based photocatalysts under visible light irradiation

“…Analysis of subject journals3.3.1 Subject analysisThe evolution and development of a discipline should be based on the existing knowledge. According to the citation records of articles in the WoS database, the discipline evolution of the research eld can be well understood(Wang, Zhong, et al 2021). The vein diagram of the reference relationships in the eld of Bi 2 WO 6 -based photocatalysts showed citing articles and cited articles (Fig.4, left and right, respectively).…”