TY - JOUR
T1 - Enhanced visible-light-induced photocatalytic NOx degradation over (Ti,C)-BiOBr/Ti3C2Tx MXene nanocomposites
T2 - Role of Ti and C doping
AU - Hermawan, Angga
AU - Hasegawa, Takuya
AU - Asakura, Yusuke
AU - Yin, Shu
N1 - Funding Information:
The authors acknowledge the financial support from JSPS Grant-in-Aid for Scientific Research Grants Number (20H00297) and the Research Grants on Innovative Areas “Mixed anion” (No.16H06439). The authors thank to Dynamic Alliance for Open Innovations Bridging Human, the Cooperative Research Program of “Network Joint Research Center for Materials and Devices” and the Nippon Sheet Glass Foundation for Materials Science and Engineering for the financial aid.
Publisher Copyright:
© 2021
PY - 2021/9/1
Y1 - 2021/9/1
N2 - NOx gas pollutants have induced continuous and massive damage to our health and environment. Photocatalysts are regarded as an efficient approach for NOx degradation. Various strategies have been devoted to optimizing photocatalyst performance. In this work, a bismuth oxybromide (BiOBr) photocatalyst was successfully combined with 2D Ti3C2Tx MXene by the solvothermal treatment. It is also found that partial decomposition of Ti3C2Tx has led the in situ doping sources for BiOBr/Ti3C2Tx nanocomposite. The photocatalytic NOx purification activity of the constructed (Ti, C) co-doped BiOBr/Ti3C2Tx nanocomposites was evaluated under light illumination. The results showed that up to 61% of NOx gas has been decontaminated as short as 10 min, exceeding the pristine BiOBr and P25 titania photocatalysts. Stable performance was also achieved after several cycles, which makes (Ti,C)-BiOBr/Ti3C2Tx nanocomposites a great promise for the long term and repeated utilization. The present strategy enhanced the photoinduced electron-hole separation and transfer of the heterostructured (Ti,C)-BiOBr/Ti3C2Tx. The match band structure configuration between (Ti,C)-BiOBr and Ti3C2Tx MXene and the synergistic process between photogenerated charge carrier transfer and intermediate Ti and C levels is discussed to explain the improved photocatalytic mechanism.
AB - NOx gas pollutants have induced continuous and massive damage to our health and environment. Photocatalysts are regarded as an efficient approach for NOx degradation. Various strategies have been devoted to optimizing photocatalyst performance. In this work, a bismuth oxybromide (BiOBr) photocatalyst was successfully combined with 2D Ti3C2Tx MXene by the solvothermal treatment. It is also found that partial decomposition of Ti3C2Tx has led the in situ doping sources for BiOBr/Ti3C2Tx nanocomposite. The photocatalytic NOx purification activity of the constructed (Ti, C) co-doped BiOBr/Ti3C2Tx nanocomposites was evaluated under light illumination. The results showed that up to 61% of NOx gas has been decontaminated as short as 10 min, exceeding the pristine BiOBr and P25 titania photocatalysts. Stable performance was also achieved after several cycles, which makes (Ti,C)-BiOBr/Ti3C2Tx nanocomposites a great promise for the long term and repeated utilization. The present strategy enhanced the photoinduced electron-hole separation and transfer of the heterostructured (Ti,C)-BiOBr/Ti3C2Tx. The match band structure configuration between (Ti,C)-BiOBr and Ti3C2Tx MXene and the synergistic process between photogenerated charge carrier transfer and intermediate Ti and C levels is discussed to explain the improved photocatalytic mechanism.
KW - BiOBr
KW - In-situ doping
KW - NO gas
KW - Nanocomposites
KW - Photocatalysts
KW - TiCT MXene
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U2 - 10.1016/j.seppur.2021.118815
DO - 10.1016/j.seppur.2021.118815
M3 - Article
AN - SCOPUS:85104913789
SN - 1383-5866
VL - 270
JO - Separation and Purification Technology
JF - Separation and Purification Technology
M1 - 118815
ER -