Article
Chemistry, Multidisciplinary
Yuanzheng Huang, Ying Jia, Ruomeng Hou, Zhiyong Huang, Keke Shen, Guofeng Jin, Li'an Hou
Summary: TiO2/SBA-15 nanocomposites were synthesized via an in situ hydrothermal method and utilized for VUV photocatalytic degradation of UDMH, showing higher efficiency compared to UV photocatalysis. The optimized TS-2 catalyst exhibited superior photocatalytic activity and reusability under VUV light.
Article
Chemistry, Applied
P. Kraszkiewicz, M. Malecka, W. Mista
Summary: This study demonstrates the possibility of anchoring 2-3 nm size gold nanoparticles inside the pores of SBA-15 mesoporous silica, resulting in a highly thermal stable Au/SBA-15 catalyst with even distribution of gold nanoparticles. The catalyst exhibits high activity in low-temperature CO oxidation due to the small size of gold nanoparticles. The resistance of Au particles to sintering can be explained by the confinement effect and the strong metal-support interaction. The carbonaceous layer from the decomposition of ethylenediamine ligands plays a vital role in stabilizing gold nanoparticles inside the SBA-15 pores.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Chemistry, Applied
Luis M. M. Correia, Mohamed M. A. Soliman, Carlos M. Granadeiro, Salete S. Balula, Luisa M. D. R. S. Martins, Armando J. L. Pombeiro, Elisabete C. B. A. Alegria
Summary: The neutral trichloro[hydrotris(1-pyrazolyl)methane]vanadium(III) C-scorpionate complex was immobilized on amine-functionalized mesoporous silica to form a composite, which showed higher catalytic performance in peroxidative oxidation of benzyl alcohol compared to the analogous homogeneous complex. Various parameters were studied, leading to overall yields of around 60% and high turnover numbers. The composite also exhibited good recyclability and structural stability, making it a promising catalyst for other oxidative reactions.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Engineering, Environmental
Andreina Garcia, Maibelin Rosales, Minju Thomas, Giovanni Golemme
Summary: Versatile materials for oxidizing As(III) into less hazardous As(V) species have attracted increasing attention. Ti-SBA-15, prepared by coating 7% anatase TiO2 on pre-formed SBA-15, showed efficient adsorption and photo-oxidation of As(III) at different pHs. The presence of TiO2 on SBA-15 promoted reactive oxygen species generation, leading to successful oxidation of As(III). Despite covering only a small percentage of the surface, TiO2 exhibited unprecedented photocatalytic behavior, making it a prominent catalyst for arsenic removal from water.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Applied
Tao Liu, Xiaoqiu Ju, Zhixin Hu, Rongrong Xie
Summary: The confinement effect of ordered mesoporous SiO2 was found to effectively inhibit the aggregation of CoOx, promoting the formation of Co(III) species and enhancing the catalytic activity for CO oxidation. Additionally, the pore size of the carrier SBA-15 played a significant role in the catalytic activity of CoOx.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Chemistry, Physical
Zengqi Lu, Xiaolong Fu, Jiamao Li, Jingwei Hou, Guangming Ran, Chengjian Xiao, Xiaolin Wang
Summary: A hydrophobic microscopic reaction environment was constructed through the modification of mesoporous silica, which helped improve the catalytic activity of the LPCE reaction. The Pt@SBA-15-tetramethyldisilazane catalyst, prepared by modifying the SBA-15 carrier and loading metal Pt, exhibited a superhydrophobic structure with a water contact angle of 158 degrees. This structure enhanced the catalytic performance and prevented catalyst deactivation. Experimental results showed that the catalyst had good catalytic activity in tritium water and maintained high activity after 30 days.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Multidisciplinary
Qianqian Zhao, Mingyang Long, Hongmiao Li, Qi Wen, Di Li
Summary: MFeO3 (M = La or Bi) photocatalysts were synthesized via a sol-gel process and showed lower photocatalytic activity for the degradation of doxycycline hydrochloride under visible light irradiation. However, after loading in the channels of SBA-15, the photocatalytic activity was enhanced due to larger surface areas. Activation of peroxymonosulfate by MFeO3/SBA-15 showed the best degradation activity, with sulfate radical as the main active substance.
NEW JOURNAL OF CHEMISTRY
(2022)
Article
Optics
Sakthivel Kumaravel, Sivakumar Thiripuranthagan, Thanigaivel Vembuli, Elangovan Erusappan, Mathivanan Durai, Thamaraiselvi Sureshkumar, Mani Durai
Summary: Mesoporous SBA-15 and x% WO3-SBA-15 catalysts were synthesized by a hydrothermal in-situ method and characterized using various analytical techniques. Among the catalysts, 5.5% WO3-SBA-15 exhibited the highest photocatalytic activity for the degradation of RhB, MB, and CV dyes under visible light irradiation. The trapping experiment confirmed that h(+) and O-2(center dot-) were the major species responsible for the photocatalytic degradation over 5.5% WO3-SBA-15 catalysts.
Article
Chemistry, Applied
Mihaela Filip, Gabriela Petcu, Elena M. Anghel, Simona Petrescu, Bogdan Trica, Petre Osiceanu, Nicolae Stanica, Irina Atkinson, Cornel Munteanu, Mihaela Mureseanu, Viorica Parvulescu
Summary: By synthesizing several FeTi-SBA-15 magnetic nanocomposites using different titanium precursors and synthesis methods, the photocatalytic performance in degrading pollutants was studied. The results demonstrated that samples with iron showed higher photocatalytic activity, and there was a synergistic effect between titanium and iron species. Additionally, these samples exhibited good stability over multiple photocatalytic cycles, indicating their potential for wastewater purification.
Article
Chemistry, Physical
Ze-Wei Wu, Jing Xiong, Cun-Wen Wang, Yuan-Hang Qin
Summary: In this study, high-loading Ni catalyst on SBA-15 is investigated to overcome the low intrinsic activity issue of Ni in NH3 decomposition. The results show that Ni/SBA-15-80 with a loading close to 40 wt% exhibits superior NH3 decomposition performance and excellent catalytic stability.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Nadeem Asghar Khan, Iqbal Ahmad, Naghmana Rashid, Muhammad Nadeem Zafar, Farooq Khurum Shehzad, Zahid Ullah, Anwar Ul-Hamid, Muhammad Faizan Nazar, Muhammad Junaid, Muhammad Faheem, Syed Salman Shafqat, Uzma Jabeen, Alaa Dahshan
Summary: This study synthesized Co3O4, Co9S8, and their heterostructure Co3O4/Co9S8 as water oxidation catalysts, and found that the Co3O4/Co9S8 heterostructure showed excellent electrocatalytic activity at low onset potential, along with good long-term stability and a low Tafel slope.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Engineering, Chemical
Syahida Nasuha Bukhari, Chi Cheng Chong, Herma Dina Setiabudi, Yoke Wang Cheng, Lee Peng Teh, Aishah Abdul Jalil
Summary: By transforming rod-like SBA-15 into fibrous type F-SBA-15 and evaluating Ni/F-SBA-15 in CO2 methantion, a superior catalytic performance was achieved due to the favorable physicochemical properties of F-SBA-15. This was evidenced by the higher stability and coke resistance ability demonstrated by Ni/F-SBA-15 compared to Ni/SBA-15.
CHEMICAL ENGINEERING SCIENCE
(2021)
Article
Chemistry, Physical
Jin Kim, Anand P. Tiwari, Myungwoo Choi, Qiang Chen, Jinho Lee, Travis G. Novak, Minsu Park, Kisun Kim, Ki-Seok An, Seokwoo Jeon
Summary: The doping state of graphene is crucial for ideal electron transfer in electrocatalytic reactions. Functionalization of graphene with non-covalent adsorbents allows accurate modulation of its electronic state, and embedding graphitic carbon-nitride on non-oxidized graphene aerogel promotes catalytic performance in oxygen reduction or evolution reactions.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Chemistry, Multidisciplinary
Seyyed Mohammad Ebrahimi, Ali Kareem Abbas, Hossein Shahbazi-Alavi, Javad Safaei-Ghomi, Atefeh Bakhtiari, Raheleh Teymuri
Summary: Functionalized SBA-15 has been utilized as an efficient catalyst for the preparation of spiroindolines, offering advantages such as catalyst reusability, low loading, high yields in short reaction times, easy product separation, and the use of ultrasonic irradiation as a valuable and powerful technology. Characterization of the catalyst was conducted using various techniques, including XRD, FE-SEM, TEM, EDX, XPS, FT-IR, N-2 adsorption analysis, TPD, and TGA.
RESEARCH ON CHEMICAL INTERMEDIATES
(2021)
Article
Engineering, Chemical
Yibin Liu, Minghao Zha, Hansong Qin, Shuang Yao, Xin Zhou, Siming Zhao, Nan Sheng, Yinghao Sun, Xin Jin, Hao Yan, Xiang Feng, Xiaobo Chen, Chaohe Yang
Summary: The study revealed that Au and Pt mainly exist in the form of alloy in the catalyst, with Au playing the role of reducing the size of AuPt alloy nanoparticles to enhance the adsorption and activation of intermediate products. After optimizing various factors, the Au1Pt2/MgO/SBA-15 (0.05) catalyst showed excellent catalytic activity and selectivity for the oxidation of glycerol. The synergistic effect between Pt and Au active sites was confirmed to facilitate the activation of C-H bond and oxidation of aldehyde group during the oxidation of glycerol.
