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
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