Enhancement of Hydrogen Evolution from Water Photocatalysis Using Liquid Phase Plasma on Metal Oxide-Loaded Photocatalysts

Abstract

This study examined hydrogen evolution by water photocatalysis using liquid phase plasma on metal oxide-loaded photocatalysts. Metal-loaded TiO 2 nanocrystallites supported on mesoporous materials were introduced as photocatalysts. SBA-15 and MCM-41 mesoporous materials were applied as a support for the metal-loaded TiO 2 nanocrystallites. The photocatalytic activities of the photocatalysts were estimated for hydrogen production from water. Hydrogen was generated in the photodecomposition of water through liquid phase plasma irradiation. The rate of hydrogen evolution was increased by the metal loading on the TiO 2 surface. Photocatalytic activity was improved significantly with Ni loading on the TiO 2 . The TiO 2 nanocrystallites prepared by sol−gel method were incorporated above 50 wt % on the MCM-41 mesoporous support. The mesoporous materials acted as an efficient photocatalytic support for the fixation of TiO 2 . Hydrogen evolution was enhanced with Ni incorporation on the TiO 2 supported on the mesoporous supports. The addition of formaldehyde to water induced an apparent enhancement of hydrogen evolution. The formaldehyde assists to improve the hydrogen production with adding of hydrogen by its decomposition.

Hydrogen Production through Catalytic Water Splitting Using Liquid-Phase Plasma over Bismuth Ferrite Catalyst

“…The OES of the LPP was performed while the plasma was directly irradiating the reactants using a fiber optic spectrometer (Avante, AvanSpec-4500, Louisville, KY, USA). The OES spectra were gathered by placing an optical fiber perpendicular to the axis of the needle electrode [47]. The measurement conditions for gathering the spectrum were 3 µs pulse-width, 230 V discharge-voltage, and 35 kHz frequency.…”

Construction of a Hierarchical Structure of Bimetallic Oxide Derived from Metal–Organic Frameworks

“…Bimetallic oxide, as a metal oxide material composed of two different metals, has aroused extensive attention concerning many domains including photocatalysis, , dye degradation, , gas sensing, , and electrochemical sensing, − ascribed to the numerous accessible metal active sites and inherent physical–chemical properties. In addition, because different types of metals usually endow target materials with specific functionality, most of the bimetallic oxides lead to enhanced performance because of the synergistic effect between two metals. ,, The common strategies to prepare bimetallic oxides include the sol–gel method, , coprecipitation, , and solvothermal and electrochemical deposition .…”

Facile Preparation of Ni-Co Bimetallic Oxide/Activated Carbon Composites Using the Plasma in Liquid Process for Supercapacitor Electrode Applications

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