Ag-induced anatase-rutile TiO2−x heterojunction facilitating the photogenerated carrier separation in visible-light irradiation

Li, Jingru; Jin, Zhouzheng; Zhang, Yiming; Liú, Dan; Ma, Aijing; Sun, Yi; Li, Xiaoyun; Cai, Qi; Gui, Jianzhou

doi:10.1016/j.jallcom.2022.164815

Cited by 21 publications

(11 citation statements)

References 52 publications

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“…The hydrogen production rate (2.72 μmol·g –1 ·h –1 ) of the anatase/rutile biphasic TiO 2 @ MoS 2 photocatalyst synthesized by Zhong et al was 16 times higher than that of pure anatase (0.16 μmol·g –1 ·h –1 ). Another anatase–rutile TiO 2 heterojunction also presented greatly enhanced photocatalytic activity. , The results from the literature verified that the coexistence of anatase/rutile phases is good for obtaining excellent photocatalytic performance. In this context, the samples in this study (except for 8RMT) containing both phases (anatase and rutile) are promising for obtaining good photocatalytic performance.…”

Section: Results and Discussionmentioning

confidence: 78%

“…Another anatase−rutile TiO 2 heterojunction also presented greatly enhanced photocatalytic activity. 41,42 The results from the literature verified that the coexistence of anatase/rutile phases is good for obtaining excellent photocatalytic performance. In this context, the samples in this study (except for 8RMT) containing both phases (anatase and rutile) are promising for obtaining good photocatalytic performance.…”

Section: Resultsmentioning

confidence: 81%

“…76–0649) . The coexistence of two phases of TiO 2 can enhance the photocatalytic performance of the photocatalyst. − For example, Liu et al constructed an anatase/rutile titanium dioxide heterojunction that significantly increased the amount of hydrogen production (201 μmol·g –1 ·h –1 ) to 12 times that of the original amount. The hydrogen production rate (2.72 μmol·g –1 ·h –1 ) of the anatase/rutile biphasic TiO 2 @ MoS 2 photocatalyst synthesized by Zhong et al was 16 times higher than that of pure anatase (0.16 μmol·g –1 ·h –1 ).…”

Section: Results and Discussionmentioning

confidence: 99%

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Highly Enhanced Photocatalytic Hydrogen Production Performance of Heterostructured Ti₃C₂/TiO₂/rGO Composites

et al. 2022

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There has been a dire need for the exploration of renewable clean hydrogen energy recourses in recent years. In this work, we investigated the photocatalytic hydrogen production of heterostructured Ti3C2/TiO2/rGO composites. Ti3C2/TiO2/rGO heterojunction nanocomposites were synthesized using two-step calcination and hydrothermal methods, and the optimum in situ growth ratio of TiO2 of 71.8% (n Ti–O/n Ti) and rGO mass ratio (m RGO/m TiO2 /mTi3C2 ) of 12% were obtained. The target photocatalyst presented an outperforming photocatalytic hydrogen production performance of 1671.85 μmol·g–1 hydrogen production capacity in 4 h, with the maximum hydrogen production rate of 808.11 μmol·g–1·h–1 in the first hour being 3.08 times the maximum hydrogen production rate of bare TiO2 (262.66 μmol·g–1·h–1). The excellent hydrogen production performance was due to the formed rutile TiO2 and the constructed heterojunction of Ti3C2/TiO2/rGO, where rGO provided different electron transport channels, and made charge transfer easier, and restrained the recombination efficiency of electrons and holes.

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Section: Results and Discussionmentioning

confidence: 78%

Section: Resultsmentioning

confidence: 81%

Section: Results and Discussionmentioning

confidence: 99%

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Highly Enhanced Photocatalytic Hydrogen Production Performance of Heterostructured Ti₃C₂/TiO₂/rGO Composites

et al. 2022

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“…Such •OH species, combined with •O 2− , have strong oxidation capacity and took part in the follow-up degradation reaction (totally oxidize the organic pollutant to H 2 O and CO 2 ) and enhanced the decolorization efficiency. As a consequence, the photocatalytic performance would be greatly improved with higher visible light response and generation of large numbers of electrons and holes (Cao et al , 2018; Jiang et al , 2017; Fu et al , 2015; Li et al , 2022) (Figure 7).…”

Section: Resultsmentioning

confidence: 99%

Enhancement of visible-light photo-activity of TiO₂ arrays for environmental water purification

Baqaei

Alvani

Sameie

2022

PRT

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Purpose Over the past decades, intense efforts have been devoted to design and synthesize efficient photocatalysts which are active under sunlight for environmental and energy applications. Titanium dioxide (TiO2) has attracted much attention over many years for organic contaminant degradation in air or water due to its strong optical absorptivity, chemical stability and low cost. However, TiO2 has a very low photo quantum yield which prompts the easy recombination of photogeneration electron/hole pairs. In addition, bandgap of 3.2 eV restrains application of this photocatalyst mainly to the UV range. Design/methodology/approach Vertically oriented one-dimensional TiO2 nanostructures remarkably improve electron transport by creating a direct conduction pathway, decreasing intercrystalline contacts and stretching grown structure with the specified directionality. In this research, to enhance the visible light absorbance of TiO2, prearranged hydrogenated titanium dioxide nanorods (H-TNRs) in the presence of H2/N2 gas flow are hydrothermally synthesized. Findings The X-ray diffraction patterns illustrated the characteristic peaks of tetragonal rutile TiO2 and confirmed that there is no phase change after hydrogenation. Trivalent titanium ions surface defects and oxygen vacancies were considered as major reasons for redshift of absorption edge toward visible region and subsequently narrowing the bandgap to 2.27 eV. The optimized photocatalysts exhibited high visible-light-driven photocatalytic activity for degradation of methylene blue in water within 210. The synthesized H-TNRs established themselves as promising photocatalysts for organic compounds degradation in the aqueous solution. Originality/value To the best of the authors’ knowledge, this work is original and has not been published elsewhere nor is it currently under consideration for publication elsewhere.

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“…Meanwhile, because of the intense interfacial contact between anatase, rutile, and Ag NPs, the conduction band potential of anatase was more positive than that of rutile. Additionally, the hot electrons firstly tended to flow to the CB of the rutile, followed by flowing to the CB of anatase [ 44 ]. This type of flow prolonged the lifetime of carriers, enhanced the separation and transfer abilities of electron-hole pairs, and was conducive to photocatalytic activity [ 45 ].…”

Section: Discussionmentioning

confidence: 99%

Efficient Inhibition of Aspergillus flavus to Reduce Aflatoxin Contamination on Peanuts over Ag-Loaded Titanium Dioxide

Yang

Wei

Yang

et al. 2023

Toxins

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Peanuts are susceptible to aflatoxins produced by Aspergillus flavus. Exploring green, efficient, and economical ways to inhibit Aspergillus flavus is conducive to controlling aflatoxin contamination from the source. In this study, Ag-loaded titanium dioxide composites showed more than 90% inhibition rate against Aspergillus flavus under visible light irradiation for 15 min. More importantly, this method could also reduce the contaminated level of Aspergillus flavus to prevent aflatoxins production in peanuts, and the concentrations of aflatoxin B1, B2, and G2 were decreased by 96.02 ± 0.19%, 92.50 ± 0.45%, and 89.81 ± 0.52%, respectively. It was found that there are no obvious effects on peanut quality by evaluating the changes in acid value, peroxide value, and the content of fat, protein, polyphenols, and resveratrol after inhibition treatment. The inhibition mechanism was that these reactive species (•O2−, •OH−, h+, and e−) generated from photoreaction destroyed cell structures, then led to the reduced viability of Aspergillus flavus spores. This study provides useful information for constructing a green and efficient inhibition method for Aspergillus flavus on peanuts to control aflatoxin contamination, which is potentially applied in the field of food and agri-food preservation.

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Ag-induced anatase-rutile TiO2−x heterojunction facilitating the photogenerated carrier separation in visible-light irradiation

Cited by 21 publications

References 52 publications

Highly Enhanced Photocatalytic Hydrogen Production Performance of Heterostructured Ti₃C₂/TiO₂/rGO Composites

Highly Enhanced Photocatalytic Hydrogen Production Performance of Heterostructured Ti₃C₂/TiO₂/rGO Composites

Enhancement of visible-light photo-activity of TiO₂ arrays for environmental water purification

Efficient Inhibition of Aspergillus flavus to Reduce Aflatoxin Contamination on Peanuts over Ag-Loaded Titanium Dioxide

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Ag-induced anatase-rutile TiO2−x heterojunction facilitating the photogenerated carrier separation in visible-light irradiation

Cited by 21 publications

References 52 publications

Highly Enhanced Photocatalytic Hydrogen Production Performance of Heterostructured Ti3C2/TiO2/rGO Composites

Highly Enhanced Photocatalytic Hydrogen Production Performance of Heterostructured Ti3C2/TiO2/rGO Composites

Enhancement of visible-light photo-activity of TiO2 arrays for environmental water purification

Efficient Inhibition of Aspergillus flavus to Reduce Aflatoxin Contamination on Peanuts over Ag-Loaded Titanium Dioxide

Contact Info

Product

Resources

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Highly Enhanced Photocatalytic Hydrogen Production Performance of Heterostructured Ti₃C₂/TiO₂/rGO Composites

Highly Enhanced Photocatalytic Hydrogen Production Performance of Heterostructured Ti₃C₂/TiO₂/rGO Composites

Enhancement of visible-light photo-activity of TiO₂ arrays for environmental water purification