Details

Autor(en) / Beteiligte

• Firtina‐Ertis, Irem
• Kerkez‐Kuyumcu, Özge

Titel

Effect of Different Amounts of Pt on Fe 3 O 4 −TiO 2 for Photocatalytic H 2 Production Under Solar Light

Ist Teil von

• ChemistrySelect (Weinheim), 2023-07, Vol.8 (27)

Erscheinungsjahr

2023

Quelle

Wiley Online Library Journals Frontfile Complete

Beschreibungen/Notizen

• Abstract In this study, Pt doped Fe 3 O 4 −TiO 2 photocatalysts were synthesized in two steps; (i) Fe 3 O 4 −TiO 2 (FT) was prepared by the complex‐assisted vapor thermal (VT) method, (ii) Pt was doped to Fe 3 O 4 −TiO 2 (FT−Pt) by the polyol method. The effect of different amounts of Pt was investigated for photocatalytic hydrogen production. The absorption spectrum of FT with 5.0 % Pt exhibits a surface plasmon resonance (SPR) peak of ∼420 nm which corresponds to the band gap of 2.95 eV. The FT and Pt doped FT samples showed a less intense photoluminescence (PL) band than TiO 2 (T) due to the lower e − /h + recombination rate. By increasing % wt. Pt in the FT samples, PL intensity was decreased. Thus, Pt plays an essential role to hinder the recombination of e − /h + pairs. Consequently, FT‐5.0 % Pt showed 144 μmol/g‐cat H 2 production rate, just about 3.3 times higher than that of FT photocatalyst; due to the suitable band gap energy and the retarded e − /h + recombination. Therefore, the synergistic effect of Pt and Fe 3 O 4 is found to be beneficial to decrease the e − /h + recombination rate thus the photocatalytic activity enhancement was achieved.