Photocatalytic Activity of B-doped Nano Graphene Oxide over Hydrogenated NiO-loaded TiO2 Nanotubes
學年 112
學期 1
出版（發表）日期 2023-12-01
作品名稱 Photocatalytic Activity of B-doped Nano Graphene Oxide over Hydrogenated NiO-loaded TiO2 Nanotubes
作品名稱（其他語言）
著者 TT Wang, SC Lim, CL Chiang, YJ Shen, P Raghunath, JR Li, YG Lin, MC Lin
單位
出版者
著錄名稱、卷期、頁數 Materials Today Sustainability, 24, 100497
摘要 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.
關鍵字 Boron dopant, Heterostructure, Photocatalysis, Hydrogen evolution, Synergistic
語言 en
ISSN
期刊性質 國外
收錄於 SCI SSCI Scopus
產學合作
通訊作者 YG Lin, MC Lin
審稿制度 是
國別 NLD
公開徵稿
出版型式 ,電子版
SDGS 可負擔的潔淨能源,產業創新與基礎設施