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Journals / Celal Bayar Üniversitesi Fen Bilimleri Dergisi / 2021 / Cilt: 17 - Sayı: 2

A Novel Donor-π-Acceptor Type Sensitizer for Dye Sensitized Photochemical Hydrogen Generation

Emre ASLAN
Pages
167–173
Publication Date
2021-06-28
DOI
—
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

The mechanism of photochemical HER is explained by electrochemical band levels of the D-π-A dye and TiO2 photocatalyst.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:A novel triphenylamine (TPA) based donor-π-acceptor (D-π-A) dye is synthesized and its optical and electrochemical properties are examined by UV-Vis absorption spectroscopy and cyclic voltammetry methods, respectively.
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Key Findings & Data:The synthesized D-π-A dye plays a role as a visible light sensitizer to wide bandgap TiO2 photocatalyst.
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Conclusion & Impact:The mechanism of photochemical HER is explained by electrochemical band levels of the D-π-A dye and TiO2 photocatalyst.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:donor-π-acceptor dye · dye sensitization · hydrogen evolution reaction

Abstract

A novel triphenylamine (TPA) based donor-π-acceptor (D-π-A) dye is synthesized and its optical and electrochemical properties are examined by UV-Vis absorption spectroscopy and cyclic voltammetry methods, respectively. The synthesized D-π-A dye plays a role as a visible light sensitizer to wide bandgap TiO2 photocatalyst. Hydrogen evolution reaction (HER) are carried out by using D-π-A dye sensitized TiO2 (Dye/TiO2) under visible light irradiation in the aqueous triethanolamine (TEOA) medium. Photoelectrochemical properties of Dye/TiO2 are investigated by using linear sweep voltammetry (LSV) and chronoamperometry (CA) techniques in the aqueous Na2SO4/TEOA solution and its transient photoelectrochemical response is reached 90 μA cm-2. In addition, phtocatalytic hydrogen evolution rates are found out as 0.52 mmol g-1 h-1 and 1.95 mmol g-1 h-1 by using of Dye/TiO2 and Dye/TiO2/Pt, respectively, which are obtained by in situ photoreduction of H2PtCl6 on the Dye/TiO2 photocatalyst. The mechanism of photochemical HER is explained by electrochemical band levels of the D-π-A dye and TiO2 photocatalyst.

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Cite This Article

ASLAN, E. (2021). A Novel Donor-π-Acceptor Type Sensitizer for Dye Sensitized Photochemical Hydrogen Generation. Celal Bayar Üniversitesi Fen Bilimleri Dergisi, Cilt: 17 - Sayı: 2, 167–173. https://ajindex.com/articles/215361

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