Titanate nanotube modified with different nickel precursors for enhanced Eosin Y-sensitized photocatalytic hydrogen evolution. (18th May 2015)

• Record Type: Journal Article
• Authors: Peng, Shaoqin; Zeng, Xianping; Li, Yuexiang
• Is Part Of: International journal of hydrogen energy. Volume 40:Number 18(2015)
• Page Start: 6038
• Page End: 6049
• Publication Date: 2015-05-18
• Subjects: Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2015.03.055
• Languages: English
• ISSNs: 0360-3199

Abstract

<abstract xml:lang="en" abstract-type="author" id="abs0010"> <title id="sectitle0010">Abstract</title> <sec> <p id="abspara0010">Nickel species were loaded on titanate nanotubes (TNT) as a hydrogen evolution cocatalyst by an impregnation–calcination method. Nickel chloride, nickel nitrate and nickel acetate were used as the precursors. More Ni²⁺ ions intercalate into the interlayer of TNT when nickel chloride is used as the precursor. In the calcination process, the titanate transforms into anatase TiO₂, and Ni²⁺ ions are reduced and doped partly in TiO₂ and titanate. The Ni²⁺ ions intercalated into TNT inner can promote the phase transformation, growth of metal Ni particles and the Ni²⁺ doping. The formed Ni particles can be oxidized in air to form core/shell Ni@NiO structure. The Ni²⁺ doping promotes the formation of oxygen defects and increases the conductivity of TNT. The photocatalytic activity of Eosin Y-sensitized nickel-modified TNT for hydrogen evolution was investigated. The TNT modified with nickel chloride exhibit higher activity, which can be attributed to the higher conductivity and more effective formation of Ni@NiO structure.</p> </sec> </abstract>