TY - JOUR
T1 - Controlled synthesis of TiO2 nanorod arrays immobilized on ceramic membranes with enhanced photocatalytic performance
AU - Zhang, Shuai
AU - Du, Yan
AU - Jiang, Hong
AU - Liu, Yefei
AU - Chen, Rizhi
N1 - Publisher Copyright:
© 2017 Elsevier Ltd and Techna Group S.r.l.
PY - 2017/6/15
Y1 - 2017/6/15
N2 - In this work, TiO2 nanorod arrays (NRAs) were synthesized directly on flat sheet Al2O3 ceramic membrane (CM) substrates by a two-step hydrothermal method. The effects of the addition of anions and cations and the preparation parameters in the second step on the morphology and size of TiO2 were investigated in detail, and the photocatalytic activities of the as-synthesized TiO2-loaded ceramic membranes were investigated by the degradation of methylene blue (MB) under UV light. The results highlighted that the growth of TiO2 on the CM strongly depended on the synthesis conditions. The anions of Cl- and Br- were favorable for the further growth of TiO2 nanorods, while the anions of SO42- and PO43- with larger ionic radius and higher charge number could retard the growth of TiO2 nanorods. The SO42- and PO43- could accelerate the formation of nanospheres or nanosheets, respectively. The cation like Na+, K+, Mg2+ and Ca2+ had no obvious impact on the formation of TiO2 NRAs. TiO2 nanorods exhibited the highest photocatalytic activity, as about 2.2 and 1.9 times larger than those of TiO2 nanosheets and TiO2 nanospheres, respectively. More importantly, the as-synthesized TiO2 NRAs-loaded ceramic membrane could be easily reused and exhibited better photocatalytic stability. These findings would aid the development of TiO2 photocatalytic materials with high performance.
AB - In this work, TiO2 nanorod arrays (NRAs) were synthesized directly on flat sheet Al2O3 ceramic membrane (CM) substrates by a two-step hydrothermal method. The effects of the addition of anions and cations and the preparation parameters in the second step on the morphology and size of TiO2 were investigated in detail, and the photocatalytic activities of the as-synthesized TiO2-loaded ceramic membranes were investigated by the degradation of methylene blue (MB) under UV light. The results highlighted that the growth of TiO2 on the CM strongly depended on the synthesis conditions. The anions of Cl- and Br- were favorable for the further growth of TiO2 nanorods, while the anions of SO42- and PO43- with larger ionic radius and higher charge number could retard the growth of TiO2 nanorods. The SO42- and PO43- could accelerate the formation of nanospheres or nanosheets, respectively. The cation like Na+, K+, Mg2+ and Ca2+ had no obvious impact on the formation of TiO2 NRAs. TiO2 nanorods exhibited the highest photocatalytic activity, as about 2.2 and 1.9 times larger than those of TiO2 nanosheets and TiO2 nanospheres, respectively. More importantly, the as-synthesized TiO2 NRAs-loaded ceramic membrane could be easily reused and exhibited better photocatalytic stability. These findings would aid the development of TiO2 photocatalytic materials with high performance.
KW - Ceramic membranes
KW - Controllable synthesis
KW - Ion effects
KW - Photocatalytic degradation
KW - TiO nanorod arrays
UR - http://www.scopus.com/inward/record.url?scp=85014454378&partnerID=8YFLogxK
U2 - 10.1016/j.ceramint.2017.03.019
DO - 10.1016/j.ceramint.2017.03.019
M3 - 文章
AN - SCOPUS:85014454378
SN - 0272-8842
VL - 43
SP - 7261
EP - 7270
JO - Ceramics International
JF - Ceramics International
IS - 9
ER -