RETRACTED: In Situ Growth of Highly Dispersed TiO<sub>2</sub> in Covalent Organic Frameworks for Photocatalytic H<sub>2</sub> Evolution
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Post-publication record
- Nature
- Retraction
- Reason
- Duplication of/in Article;Euphemisms for Duplication;
- Date
- 5/15/2025 0:00
- Flagged by OpenAlex?
- Yes
Source: Retraction Watch, joined by DOI. OpenAlex records retraction as is_retracted, a boolean over a state space with at least four values, so it cannot express an expression of concern, a correction or a reinstatement — it reports them as false, which reads as “fine”.
Abstract
Titanium dioxide (TiO 2 ) has the disadvantages of being difficult to excite and easily agglomerating in use. The imine-linked covalent organic frameworks (COFs) have shown various excellent properties in diverse fields, but the drawbacks such as monofunctionality and poor light-corrosion resistance are the problems that need to be improved in photocatalytic applications. In this paper, the imine-linked COF (COF-Im) was prepared and then transformed into a quinoline-based COF (COF-Qui) by an aza-Diels–Alder reaction, which successfully improved the light absorption and stability of the COFs. The COF-Qui-TiO 2 heterojunction photocatalyst was successfully prepared by in situ growth of TiO 2 in pores of COF-Qui. The highest H 2 evolution rate of COF-Qui-TiO 2 was 5373 μmol·h –1 ·g –1, and it maintained good performance and a stable structure after 5 cycles. This work provided valuable experience for the development of novel, efficient heterojunction photocatalysts.
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The record
- Venue
- Inorganic Chemistry
- Topic
- Covalent Organic Framework Applications
- Field
- Materials Science
- Canadian institutions
- Innovation Cluster (Canada)
- Funders
- Beijing Institute of TechnologyNational Natural Science Foundation of ChinaNatural Science Foundation of Xinjiang Province
- Keywords
- IminePhotocatalysisChemistryCovalent bondCovalent organic frameworkHeterojunctionChemical engineeringCorrosionTitanium dioxideAbsorption (acoustics)QuinolineNanotechnologyOrganic chemistryCatalysisMaterials scienceComposite materialOptoelectronics
- Has abstract in OpenAlex
- yes