التفاصيل البيبلوغرافية
| العنوان: |
Bimetallic Mesoporous MCM-41 Nanoparticles with Ta/(Ti, V, Co, Nb) with Catalytic and Photocatalytic Properties |
| المؤلفون: |
Viorica Parvulescu, Gabriela Petcu, Nicoleta G. Apostol, Irina Atkinson, Simona Petrescu, Adriana Baran, Daniela C. Culita, Ramona Ene, Bogdan Trica, Elena M. Anghel |
| المصدر: |
Nanomaterials, Vol 14, Iss 24, p 2025 (2024) |
| بيانات النشر: |
MDPI AG, 2024. |
| سنة النشر: |
2024 |
| المجموعة: |
LCC:Chemistry |
| مصطلحات موضوعية: |
Ta/Me-MCM-41, Me (Nb, Ti, V, Co), bimetallic catalysts, photocatalysts, olefine oxidation, organic pollutants, Chemistry, QD1-999 |
| الوصف: |
Bimetallic (Ta/Ti, V, Co, Nb) mesoporous MCM-41 nanoparticles were obtained by direct synthesis and hydrothermal treatment. The obtained mesoporous materials were characterized by XRD, XRF, N2 adsorption/desorption, SEM, TEM, XPS, Raman, UV-Vis, and PL spectroscopy. A more significant effect was observed on the mesoporous structure, typically for MCM-41, and on optic properties if the second metal (Ti, Co) did not belong to the same Vb group with Ta as V and Nb. The XPS showed for the TaTi-MCM-41 sample that framework titanium is the major component. The new nanoparticles obtained were used as catalysts for oxidation with hydrogen peroxide of olefinic compounds (1,4 cyclohexadiene, cyclohexene, styrene) and photodegradation of organic pollutants (phenol, methyl orange) from water. The results showed improvementsin activity and selectivity in oxidation reactions by the addition of the second metal to the Ta-MCM-41 catalyst. The slow addition of H2O2 was also beneficial for the selectivity of epoxide products and the stability of the catalysts. The band gap energy values decreased in the presence of the second metal, and the band edge diagram evidenced positive potential for all the conduction bands of the bimetallic samples. The highestlevels of photocatalytic degradation were obtained for the samples with TaTi and TaV. |
| نوع الوثيقة: |
article |
| وصف الملف: |
electronic resource |
| اللغة: |
English |
| تدمد: |
2079-4991 |
| Relation: |
https://www.mdpi.com/2079-4991/14/24/2025; https://doaj.org/toc/2079-4991 |
| DOI: |
10.3390/nano14242025 |
| URL الوصول: |
https://doaj.org/article/48b639275d954ad3b964adec45153144 |
| رقم الانضمام: |
edsdoj.48b639275d954ad3b964adec45153144 |
| قاعدة البيانات: |
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