Ti3+ self-doped mesoporous black TiO2/SiO2/g-C3N4 sheets heterojunctions as remarkable visible-lightdriven photocatalysts

Hu, Mengqiao; Xing, Zipeng; Cao, Yan; Li, Zhenzi; Yan, Xu; Xiu, Ziyuan; Zhao, Tianyu; Yang, Shilin; Zhou, Wei

doi:10.1016/j.apcatb.2017.12.069

Cited by 136 publications

(37 citation statements)

References 42 publications

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“…Lately, there has been some research devoted to black titanium dioxide. Mengqiao Hu et al used Ti 3+ self-doped mesoporous black TiO 2 /SiO 2 /g–C 3 N 4 sheets [ 137 ]. The system has a bandgap of ~2.25 eV and photocatalytic hydrogen evolution of 572.6 µmol/gh.…”

Section: Experimental Researchmentioning

confidence: 99%

TiO2 as a Photocatalyst for Water Splitting—An Experimental and Theoretical Review

et al. 2021

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Hydrogen produced from water using photocatalysts driven by sunlight is a sustainable way to overcome the intermittency issues of solar power and provide a green alternative to fossil fuels. TiO2 has been used as a photocatalyst since the 1970s due to its low cost, earth abundance, and stability. There has been a wide range of research activities in order to enhance the use of TiO2 as a photocatalyst using dopants, modifying the surface, or depositing noble metals. However, the issues such as wide bandgap, high electron-hole recombination time, and a large overpotential for the hydrogen evolution reaction (HER) persist as a challenge. Here, we review state-of-the-art experimental and theoretical research on TiO2 based photocatalysts and identify challenges that have to be focused on to drive the field further. We conclude with a discussion of four challenges for TiO2 photocatalysts—non-standardized presentation of results, bandgap in the ultraviolet (UV) region, lack of collaboration between experimental and theoretical work, and lack of large/small scale production facilities. We also highlight the importance of combining computational modeling with experimental work to make further advances in this exciting field.

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Section: Experimental Researchmentioning

confidence: 99%

TiO2 as a Photocatalyst for Water Splitting—An Experimental and Theoretical Review

et al. 2021

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“…NAA template-based fabrication enables tailor-engineering of a periodic structure, as demonstrated by Lim et al [ 216 ], where the fabrication of 2D Au nanodot single-lattices with different geometry is presented. There are many ways in which a material of interest can be introduced into NAA: Electrodeposition [ 217 , 218 ], salinization [ 206 ], inkjet printing [ 219 ], galvanic displacement [ 220 ], spraying [ 221 ], and polymerization [ 222 ]. With a precisely adjusted experimental setup, obtained structures feature an advanced morphology and can mix several functionalities or elements ( Figure 17 ) [ 223 ].…”

Section: Examples Of Naa Applicationsmentioning

confidence: 99%

Recent Advances in Nanoporous Anodic Alumina: Principles, Engineering, and Applications

2021

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The development of aluminum anodization technology features many stages. With the story stretching for almost a century, rather straightforward—from current perspective—technology, raised into an iconic nanofabrication technique. The intrinsic properties of alumina porous structures constitute the vast utility in distinct fields. Nanoporous anodic alumina can be a starting point for: Templates, photonic structures, membranes, drug delivery platforms or nanoparticles, and more. Current state of the art would not be possible without decades of consecutive findings, during which, step by step, the technique was more understood. This review aims at providing an update regarding recent discoveries—improvements in the fabrication technology, a deeper understanding of the process, and a practical application of the material—providing a narrative supported with a proper background.

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“…Figure 2c presents the Ti 2p photoelectron spectra of TiO 2 , the Ti 2p peaks at 464.76, 463.7, 459.03, and 458.48 eV were observed corresponding to Ti 4+ 2p 1/2 , Ti 3+ 2p 1/2 , Ti 4+ 2p 3/2 , and Ti 3+ 2p 3/2 , respectively [55,62]. However, it can be seen that after the plasma treatment in the Ar atmosphere, the peaks of Ti 4+ at 459.03 eV and 464.76 eV were shifted by 0.36 eV and 0.24 eV, and the content of Ti 3+ peak was increased, implying that Ti 3+ was generated as a result of the Ti 4+ reduction.…”

Section: Resultsmentioning

confidence: 99%

Enhanced Photocatalytic Degradation of Organic Dyes via Defect-Rich TiO2 Prepared by Dielectric Barrier Discharge Plasma

Wang

et al. 2019

Nanomaterials

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The dye wastewater produced in the printing and dyeing industry causes serious harm to the natural environment. TiO2 usually shows photocatalytic degradation of dye under the irradiation ultravilet light rather than visible light. In this work, a large number of oxygen vacancies and Ti3+ defects were generated on the surface of the TiO2 nanoparticles via Ar plasma. Compared with pristine TiO2 nanoparticles, the as-obtained Ar plasma-treated TiO2 (Ar-TiO2) nanoparticles make the energy band gap reduce from 3.21 eV to 3.17 eV and exhibit enhanced photocatalytic degradation of organic dyes. The Ar-TiO2 obtained exhibited excellent degradation properties of methyl orange (MO); the degradation rate under sunlight irradiation was 99.6% in 30 min, and the photocatalytic performance was about twice that of the original TiO2 nanoparticles (49%). The degradation rate under visible light (λ > 400 nm) irradiation was 89% in 150 min, and the photocatalytic performance of the Ar-TiO2 was approaching ~4 times higher than that of the original TiO2 nanoparticles (23%). Ar-TiO2 also showed good degradation performance in degrading rhodamine B (Rho B) and methylene blue (MB). We believe that this plasma strategy provides a new method for improving the photocatalytic activity of other metal oxides.

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Ti3+ self-doped mesoporous black TiO2/SiO2/g-C3N4 sheets heterojunctions as remarkable visible-lightdriven photocatalysts

Cited by 136 publications

References 42 publications

TiO2 as a Photocatalyst for Water Splitting—An Experimental and Theoretical Review

TiO2 as a Photocatalyst for Water Splitting—An Experimental and Theoretical Review

Recent Advances in Nanoporous Anodic Alumina: Principles, Engineering, and Applications

Enhanced Photocatalytic Degradation of Organic Dyes via Defect-Rich TiO2 Prepared by Dielectric Barrier Discharge Plasma

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