Article
Energy & Fuels
Haiwei Li, Shangqing Zhao, Weilong Zhang, Hui Du, Xiaolong Yang, Yanhua Peng, Dezhi Han, Bo Wang, Zhuo Li
Summary: Zeolite-based solid acid catalysts are a promising alternative to liquid acid catalysts for producing eco-friendly plasticizer tributyl citrate (TBC), due to their non-corrosive nature, high hydrothermal stability, and recyclability.
Article
Energy & Fuels
Mingqiang Chen, Xiaoyang Feng, Yishuang Wang, Defang Liang, Chang Li, Zhonglian Yang, Jun Wang
Summary: In this study, attapulgite-based MCM-41 (AM) was synthesized using attapulgite as a silicon source, and AM-supported Ni/Ce/Zr catalysts were manufactured by sol-gel assisted impregnation method. It was found that the optimal Ce-Zr additives and calcination temperature could enhance the electronic interaction among Ni/Ce/Zr components, resulting in the highest ethanol conversion rate and stability of the catalyst. This study provides a new opportunity for the preparation of efficient and low-cost AM-supported Ni/Ce/Zr catalysts for ethanol steam reforming.
Article
Nanoscience & Nanotechnology
Emad Al-Dhubhani, Michele Tedesco, Wiebe M. de Vos, Michel Saakes
Summary: Electrospinning combined with electrospraying can produce efficient bipolar membranes (BPMs) with enhanced water dissociation performance by introducing MCM-41 as a catalyst, which is of great significance for fuel cell and flow battery applications.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Opeoluwa O. Fasanya, Abdulazeez Y. Atta, Myo T. Z. Myint, Joydeep Dutta, Baba Y. Jibril
Summary: CuZn-based catalysts synthesized by different methods showed diverse physico-chemical properties. Catalysts prepared by one pot hydrothermal synthesis and coimpregnation exhibited the highest methanol conversion and H2 selectivity, indicating that catalytic activity is largely affected by the nature of Cu species within the catalyst matrix.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Multidisciplinary
Yixuan Huang, Guangcai Zhang, Qinhui Zhang
Summary: The experiment demonstrated that the dispersity and acidity of the WOX/MCM-41 solid acid catalyst were influenced by the impregnation amount and calcination temperature of WOX speciation. In the ketalization reaction of glycerol and acetone, the optimal preparation conditions for the WOX/MCM-41 solid acid catalyst were impregnation of 20 wt % and calcination at 350 degrees C.
Article
Materials Science, Ceramics
Tiago Fernandes de Oliveira, Marta Ligia Pereira da Silva, Andre Luis Lopes-Moriyama, Carlson Pereira de Souza
Summary: The study successfully prepared a novel bimetallic mesoporous material MCM-41 by incorporating niobium and tantalum into the molecular sieve structure through direct hydrothermal synthesis, and verified the successful replacement of silicon atoms by metallic cations through various characterization techniques. The catalyst demonstrated good structural order preservation and high specific surface area, making it suitable for various applications.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Applied
Arti Malik, Udai P. Singh
Summary: We report the synthesis, characterization, and catalytic activity of a highly efficient and reusable silica-based catalyst MCM-41@CP@PAL@Cu. The catalyst was prepared by anchoring a Cu(II)-Schiff base complex onto mesoporous MCM-41 with a surface-grafted -chloro group. Various analytical methods, including FT-IR, Low angle P-XRD, TGA, N-2 adsorption-desorption, SEM, TEM, and MPAES, were used to characterize the obtained catalyst. The composition and chemical state of Cu metal in the catalyst were identified using X-ray photoelectron spectroscopy. The catalyst MCM-41@CP@PAL@Cu was employed for the conversion of various alkenes to their epoxides with a yield of 99% in the model reaction. The catalyst can be reused for at least six times.
JOURNAL OF POROUS MATERIALS
(2023)
Article
Engineering, Chemical
Jian-Feng Diao, Peng-Rui Li, Teng Zhang, Zhong-Ning Xu, Guo-Cong Guo
Summary: In this work, an efficient Zr-MCM-41 supported nickel phyllosilicate (Ni-PS) catalyst has been developed to address the problem of carbon deposition caused by CH4 cracking. Adding Zr improves the stability of the catalyst and enhances its ability to remove carbon deposition and improve stability.
CHEMICAL ENGINEERING SCIENCE
(2023)
Article
Chemistry, Physical
Reda S. Salama, Salah M. El-Bahy, Mohammed A. Mannaa
Summary: In this study, incorporation of sulfamic acid (SA) into mesoporous silica (MCM-41) was successfully achieved to prepare SA/MCM-41 composites with different weight content of SA. The composites were characterized using various techniques and displayed excellent performance in multicomponent reactions. The acidic strength of the composites improved progressively with increasing SA content, leading to high catalytic efficiency without significant loss in performance upon reuse.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Multidisciplinary Sciences
Aiqun Yuan, Hui Liang, Zengwei Huang, Dongping Wei
Summary: The mechanism and kinetic equation of tributyl citrate synthesis were studied, showing that particle size and stirring speed have significant effects on the reaction. A yield of 97% was achieved under optimized conditions, with the control step being the reaction between dibutyl citrate and n-butanol to form tributyl citrate.
Article
Chemistry, Inorganic & Nuclear
Saurabh Sharma, Udai P. Singh, A. P. Singh
Summary: A new and green heterogeneous MCM-41@PDCA-Co catalyst has been successfully applied in the synthesis of polyhydroquinoline and its derivatives with a yield of 98% under solvent free conditions at 100 degrees C. The catalyst can be easily recovered from the reaction mixture by simple filtration method and reused several times without significant loss in stability and activity.
Article
Chemistry, Inorganic & Nuclear
Saurabh Sharma, Udai P. P. Singh
Summary: A new hybrid catalyst has been synthesized by immobilizing copper(II) alpha-diimine complex on mesoporous silica. The catalyst shows high reactivity and stability in converting alkenes into epoxides, with trans stilbene achieving a maximum yield of 100%. It can be recycled and reused multiple times without significant loss of activity.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Chemistry, Applied
Monika Wysocka-Zolopa, Izabela Zablocka, Emilia Gradzka, Jakub Goclon, Krzysztof Winkler
Summary: A nanocomposite of polypyrrole@MCM-41 was prepared by polymerizing pyrrole inside silica nanopores, resulting in stable electrochemical activity at positive potentials. Characterization was done using various techniques, and the composite's electrochemical properties were compared with DFT calculations.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Chemistry, Physical
Amr A. Ibrahim, Reda S. Salama, Sohier A. El-Hakam, Abdelrahman S. Khder, Awad Ahmed
Summary: The insertion of phosphotungstic acid (PTA) and zirconia (ZrO2) into mesoporous MCM-41 significantly improved the acidic strength and surface acidity of the composite material. After determining the optimal catalytic activity and surface acidity of 25.0 wt% PTA/Zr-MCM-41, adsorption experiments revealed that this composite has high adsorption capacity for Methylene Blue (MB).
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Chemistry, Inorganic & Nuclear
M. Bharathi, S. Mathivathani, S. Indira, G. Vinoth, Denzil Britto Christopher Leslee, K. Shanmuga Bharathi
Summary: A new class of heterogeneous catalyst, Ni-MCM-41, has been synthesized and characterized. It shows excellent performance in the green synthesis of quinoxaline derivatives through thermal, ultrasonic, and microwave methods, providing advantages such as mild reaction conditions, short reaction time, high yield, catalyst stability, and easy retrievability.
