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學年
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112 |
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學期
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1 |
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出版（發表）日期
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2023-12-01 |
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作品名稱
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Photocatalytic Activity of B-doped Nano Graphene Oxide over Hydrogenated NiO-loaded TiO2 Nanotubes |
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作品名稱（其他語言）
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著者
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TT Wang, SC Lim, CL Chiang, YJ Shen, P Raghunath, JR Li, YG Lin, MC Lin |
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單位
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出版者
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著錄名稱、卷期、頁數
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Materials Today Sustainability, 24, 100497 |
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摘要
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A hydrogenated NiO-loaded anatase TiO2 with unique heterostructure nanotube arrays (denoted as H:(NiO/TiO2)) NTs were synthesized, followed by the attachment of boron-doped reduced nanographene oxide nanoparticles (B-nGO NPs) to form a vigorous composite photoelectrode B-nGO/H:(NiO/TiO2) NTs. The p-n junction created between p-type NiO and n-type TiO2 produces sufficient built-in electric field to facilitate the electron–hole pair separation and boost the interfacial electron transfer, subsequently a hydrogenation treatment to adjust the donor density and maximize the electron–hole separation. The microstructure characterization with synchrotron-based X-ray techniques straightened out that the created NiO oxygen vacancies can provide emptier d-orbitals to accept more photoexcited electrons. With the incorporation of B-nGO NPs, the partially replacement of C atoms of nGO by B atoms can form an electron–hole-rich configuration in the heterostructure to decrease the Fermi level, with a more rapid electron transfer toward TiO2 substrate during photocatalysis, which also confirmed by quantum-chemical calculations. The as-synthesized B-nGO/H:(NiO/TiO2) NTs exhibited a high photocurrent density (2.0 mA/cm2) and an effective photoconversion efficiency (2.07%) under simulated sunlight irradiation (AM1.5G, 100 mW/cm2). The eventuated photoconversion efficiency is 6 times enhanced with respect to the pristine TiO2, along with an impressive hydrogen evolution rate of 31 μmol/h/cm2. Moreover, the photocurrent durability test has confirmed the stability of B-nGO/H:(NiO/TiO2) electrode, with only a slight decay of <1% after continuous illumination for more than 4 h. Incident photon conversion efficiency spectra have revealed a boosted photo-response under visible light region (extended to ∼520 nm) with the synergistic attachment of NiO and B-nGO. |
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關鍵字
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Boron dopant, Heterostructure, Photocatalysis, Hydrogen evolution, Synergistic |
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語言
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en |
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ISSN
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期刊性質
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國外 |
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收錄於
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SCI
SSCI
Scopus
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產學合作
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通訊作者
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YG Lin, MC Lin |
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審稿制度
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是 |
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國別
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NLD |
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公開徵稿
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出版型式
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,電子版 |