Enhanced visible light-driven photodegradation of rhodamine B by Ti3+ self-doped TiO2@Ag nanoparticles prepared using Ti vapor annealing
- 9 Downloads
In recent years, Ti3+ self-doped TiO2 (B-TiO2) exhibits great potential as a photocatalyst. In this work, Ti vapor-assisted annealing is first demonstrated for Ti3+ doping and improving the visible absorption of TiO2. TEM results exhibit the formation of disordered layer, indicating the successful fabricating of B-TiO2. The absorption increase in TiO2 caused by Ti vapor annealing reaches nearly 50% in the visible wavelength range. Benefiting from the absorption increase, the photocatalytic performance of TiO2 after Ti vapor annealing increases by 60–70%. Surface modification of Ag onto B-TiO2 is also carried out to further improve its optical property. Ag-modified Ti3+ self-doped TiO2 (B-TiO2@Ag) exhibits great visible photodegradation behavior to RhB. The RhB degradation rate reaches 97.76% after 60 min of visible light irradiation. Electrochemical performance tests demonstrate that as-prepared TiO2@Ag has lower resistance than W-TiO2. The results indicate that B-TiO2@Ag has great potential in solar photocatalytic degradation of pollutant.
This work is supported by National Natural Science Foundation of China (61774084), the Fundamental Research Funds for the Central Universities (3082017NP2017106), Joint Frontier Research Project of Jiangsu Province (BY2016003-09), the Postgraduate Research & Practice Innovation Program of Jiangsu Province (KYCX18_0273), and a Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions.
WY has taken the responsibilities of manuscript writing and the design of experiments. HS has modified the manuscript. The relevant characterizations were done by HM. Parts of experiment were finished by JG.
Compliance with ethical standards
Conflicts of interest
The authors declare there are no conflicts of interest regarding the publication of this paper.
- 9.Wang SC, Cai JS, Mao JJ, Li SH, Shen JL, Gao SW, Huang JY, Wang XQ, Parkin IP, Lai YK (2019) Defective black Ti3+ self-doped TiO2 and reduced graphene oxide composite nanoparticles for boosting visible-light driven photocatalytic and photoelectrochemical activity. Appl Surf Sci 467:45–55CrossRefGoogle Scholar
- 10.Qiao PZ, Wu JX, Li HZ, Xu YC, Sun BJ, Ren LP, Pan K, Wang L, Zhou W (2019) Improved charge separation of NiS nanoparticles modified defect-engineered black TiO2 hollow nanotubes for boosting solar-driven photocatalytic H2 evolution. Nanotechnology 30:125703(1–8)Google Scholar
- 25.Liu PT, Liu YG, Ye WC, Ma J, Gao DQ (2016) Flower-like N-doped MoS2 for photocatalytic degradation of RhB by visible light irradiation. Nanotechnology 27:225403(1–8)Google Scholar