دورية أكاديمية
Tailoring of Visible to Near-Infrared Active 2D MXene with Defect-Enriched Titania-Based Heterojunction Photocatalyst for Green H 2 Generation
| العنوان: | Tailoring of Visible to Near-Infrared Active 2D MXene with Defect-Enriched Titania-Based Heterojunction Photocatalyst for Green H 2 Generation |
|---|---|
| المؤلفون: | Sudeshna Das Chakraborty, Uttam Kumar, Pallab Bhattacharya, Trilochan Mishra |
| سنة النشر: | 2024 |
| مصطلحات موضوعية: | Medicine, Evolutionary Biology, Ecology, Marine Biology, Space Science, Chemical Sciences not elsewhere classified, Physical Sciences not elsewhere classified, pl intensity established, increased electron mobility, desired interface engineering, 6 times higher, 53 mmol g, 26 mmol g, free composite photocatalyst, third semiconducting site, enough oxygen vacancy, broad absorption window, tertiary composite due, free tertiary composite, based heterojunction photocatalyst, apparent quantum efficiency, 3 , solar light utilization, 2 , tertiary composite, solar spectrum, semiconducting cauliflower, sub ><, >, transfer resistance |
| الوصف: | A wide solar light absorption window and its utilization, long-term stability, and improved interfacial charge transfer are the keys to scalable and superior solar photocatalytic performance. Based on this objective, a noble metal-free composite photocatalyst is developed with conducting MXene (Ti 3 C 2 ) and semiconducting cauliflower-shaped CdS and porous Cu 2 O. XPS, HRTEM, and ESR analyses of TiO y @Ti 3 C 2 confirm the formation of enough defect-enriched TiO y (where y is < 2) on the surface of Ti 3 C 2 during hydrothermal treatment, thus creating a third semiconducting site with enough oxygen vacancy. The final material, TiO y @Ti 3 C 2 /CdS/Cu 2 O, shows a broad absorption window from 300 to 2000 nm, covering the visible to near-infrared (NIR) range of the solar spectrum. Photocatalytic H 2 generation activity is found to be 12.23 and 16.26 mmol g –1 h –1 in the binary (TiO y @Ti 3 C 2 /CdS) and tertiary composite (TiO y @Ti 3 C 2 /CdS/Cu 2 O), respectively, with good repeatability under visible–NIR light using lactic acid as the hole scavenger. A clear increase of efficiency by 1.53 mmol g –1 h –1 in the tertiary composite due to NIR light absorption supports the intrinsic upconversion of electrons, which will open a new prospective of solar light utilization. Decreased charge-transfer resistance from the EIS plot and a decrease in PL intensity established the improved interfacial charge separation in the tertiary composite. Compared to pure CdS, H 2 generation efficiency is 29.6 times higher on the noble metal-free tertiary composite with an apparent quantum efficiency of 12.34%. Synergistic effect of defect-enriched TiO y formation, creation of proper dual p–n junction on a Ti 3 C 2 sheet as supported by the Mott–Schottky plot, significant NIR light absorption, increased electron mobility, and charge transfer on the conductive Ti 3 C 2 layer facilitate the drastically increased hydrogen evolution rate even after several cycles of repetition. Expectantly, the 2D MXene-based heterostructure with ... |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | unknown |
| العلاقة: | https://figshare.com/articles/journal_contribution/Tailoring_of_Visible_to_Near-Infrared_Active_2D_MXene_with_Defect-Enriched_Titania-Based_Heterojunction_Photocatalyst_for_Green_H_sub_2_sub_Generation/24937251Test |
| DOI: | 10.1021/acsami.3c13075.s001 |
| الإتاحة: | https://doi.org/10.1021/acsami.3c13075.s001Test https://figshare.com/articles/journal_contribution/Tailoring_of_Visible_to_Near-Infrared_Active_2D_MXene_with_Defect-Enriched_Titania-Based_Heterojunction_Photocatalyst_for_Green_H_sub_2_sub_Generation/24937251Test |
| حقوق: | CC BY-NC 4.0 |
| رقم الانضمام: | edsbas.880686E8 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1021/acsami.3c13075.s001 |
|---|