Article
Engineering, Chemical
Vinayak Hegde, Parimal Pandit, Pranita Rananaware, Varsha P. Brahmkhatri
Summary: Sulfonic acid functionalized mesoporous silica catalysts with different morphology were designed and characterized. The cube-shaped catalyst exhibited better catalytic activity compared to the spherical-shaped catalysts, and it also showed good regenerability.
FRONTIERS OF CHEMICAL SCIENCE AND ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Chenyi Yuan, Xiqing Wang, Xuanyu Yang, Abdulaziz A. Alghamdi, Fahad A. Alharthi, Xiaowei Cheng, Yonghui Deng
Summary: Novel sulfonic acid functionalized core-shell Fe3O4@carbon microspheres were designed and synthesized as an efficient and recyclable heterogeneous acid catalyst. These microspheres possess magnetic properties, high saturation magnetization value, uniform core-shell structure, and abundant acid functional groups. They exhibited high selectivity and recyclability in the acetalization reaction, demonstrating promising potential for industrial applications.
CHINESE CHEMICAL LETTERS
(2021)
Article
Chemistry, Applied
Deepika Radhakrishnan, Vaishwik Patel, Shan Mohanan, Kavitha Ramadass, Ajay Karakoti, Ajayan Vinu
Summary: In this study, core-shell mesoporous silica nanomaterials (MSNSs) with high drug loading capacity were successfully synthesized using a unique combination of triple surfactants, and targeted delivery of carboplatin for the treatment of lung cancer was achieved. The optimized MSNS showed excellent surface properties and ordered structure, and could release drugs steadily in vitro with high targeting ability and cytotoxicity. This study provides a new single-step synthesis method for delivering drugs in treating different types of cancers.
MICROPOROUS AND MESOPOROUS MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Xiaobin Xie, Marijn A. van Huis, Alfons van Blaaderen
Summary: A new method for synthesizing Au NP@mSiO(2) yolk-shell particles with tunable size and hollow space is proposed, the structure can be manipulated from core-shell to yolk-shell by varying reaction parameters, and the release of Au nanotriangle cores in yolk-shell particles was demonstrated through liquid-cell transmission electron microscopy.
Article
Materials Science, Multidisciplinary
Desinta Dwi Ristiana, Suyanta Suyanta, Nuryono Nuryono
Summary: Ethyl levulinate (EL) is an important additive in biodiesel and industrial applications. The most common method for its production involves esterification of biomass-derived levulinic acid (LA) with ethanol (EtOH) using corrosive mineral acid catalysts. To improve the process, researchers have focused on developing highly active solid acid catalysts. In this study, the catalytic activity of sulfonic acid-functionalized silica (SiO2-SO3H) with varying hydrophobicity was investigated. It was found that longer alkyl chains decreased acidity and catalytic activity, while increasing particle size and hydrophobicity. Silica modified with the methyl group (SiO2-SO3H/Me) showed the highest acidity and catalytic performance.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Green & Sustainable Science & Technology
Xiaoxun Yang, Mohammad Mehdi Sadughi, Ashkan Bahadoran, Maysoon Al-Haideri, Pouya Ghamari Kargar, Aiyah S. Noori, Seyed Mehrzad Sajjadinezhad
Summary: This study systematically investigated the sustainable process and direct synthesis of 5-hydroxymethylfurfural (5-HMF) using inexpensive catalysts and recyclable magnetic nanocatalysts. A new magnetic heterogeneous catalyst, Fe3O4@SBA-16-SO3H, was successfully synthesized and showed excellent catalytic activity and recovery performance. It achieved a high conversion rate of glucose and fructose (95%) and a high yield of 5-HMF (97%).
Article
Engineering, Chemical
Yunlu Li, Liyuan Li, Hongliang Zhao, Jichang Liu, Kake Zhu
Summary: Researchers have discovered that functionalizing the surface of mesoporous silica MCM-41 can immobilize Ag+ on the material, transforming it from an unselective porous solid into an olefin selective molecular sieve material suitable for liquid phase binary mixture separations. Results show that ionically anchored Ag+ with intact complexation orbitals outperform coordinatively immobilized Ag+ in terms of antileaching property, olefin separation factor, and recyclability. The use of small mesopore size can boost olefin adsorption selectivity by compressing the available space for access of paraffins.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Inorganic & Nuclear
Pan-Feng Wu, Qi Xue, Tian-Yu Wang, Shan-Jian Li, Gao-Peng Li, Gang-Lin Xue
Summary: The novel composite Fe3O4@SiO2@mSiO(2)-PW12/Ag exhibits high photocatalytic activity, effectively degrading methyl orange and reducing Cr(vi) under simulated sunlight. The enhanced catalytic activities are attributed to its high specific surface area, synergistic effect among the components, and the formation of a heterojunction of PW12/Ag.
DALTON TRANSACTIONS
(2021)
Article
Chemistry, Applied
Rui Sun, Pengchao Qiao, Zhe Wang, Wei Wang
Summary: This study demonstrates the preparation of monodispersed large-pore mesoporous silica nanoparticles using a sulfuric acid assisted hydrothermal process, enabling precise control over drug loading and release performance with high surface area and large mesopore structures.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Chemistry, Applied
Anoop Singh, Narinder Singh, Navneet Kaur
Summary: In this study, fluorescent conjugated and nonconjugated polythioamide were synthesized using a one-pot method with dialdehyde, diamines, and elemental sulfur, in the presence of IL1-IL2@Fe(3)O(4)NPs as a catalyst via the Willgerodt-Kindler reaction. A magnetized iron nanoparticles heterogeneous catalyst coated with an ionic liquid was synthesized. The catalyst was characterized by BET, XPS, PXRD, TEM, and FTIR spectroscopy. The multicomponent reaction proceeded smoothly at ambient temperature with excellent yield in the presence of the catalyst. The magnetic catalyst could be easily recovered, indicating the potential of this method for efficient polymerization of structurally diversified polythioamides.
APPLIED ORGANOMETALLIC CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Yuji Fujii, Shujun Zhou, Manabu Shimada, Masaru Kubo
Summary: A method was developed to synthesize hollow mesoporous nanoparticles with controllable size and shell thickness for drug-delivery applications. Monodispersed hollow mesoporous organosilica (HMOS) and hollow mesoporous silica (HMS) nanoparticles were successfully prepared using soft and hard templating methods. The hollow size of HMOS can be tuned by changing the size of the hard templates, and the shell thicknesses of HMOS and HMS can be adjusted by changing the amount of precursor used.
Article
Chemistry, Multidisciplinary
Liang Peng, Huarong Peng, Chin-Te Hung, Dingyi Guo, Linlin Duan, Bing Ma, Liangliang Liu, Wei Li, Dongyuan Zhao
Summary: A programmable shear-induced dynamic assembly approach was developed to synthesize mesoporous carbon nanospheres with tunable core-shell structures and gradient pore systems. The micelle structures in the system can be adjusted by changing shear force and a programmatically proceeded synthesis process results in intelligent assembly of multimodal mesostructures. The resultant carbon nanospheres exhibit high capacity and ultra-long cyclic life for sodium-ion storage, showing potential for innovative applications.
Article
Chemistry, Multidisciplinary
Parth Patel, Raj Kumar Tak, Bhavesh Parmar, Shilpa Dabas, Brijesh Patel, Eringathodi Suresh, Noor-ul H. Khan, Saravanan Subramanian
Summary: The study introduces a nitrogen-rich sulfonated carbon catalyst derived from an inexpensive precursor for the synthesis of bioactive vicinal diols. The well-characterized catalyst exhibits wide generality and can be reused for four cycles without loss of activity under mild reaction conditions.
Article
Engineering, Environmental
Ali Akbari, Elham Akbari, Amirreza Azadmehr, Ardeshir Hezarkhani
Summary: The study successfully prevented the production of acidic effluent by preparing Pyrite@Silica on the surface of natural pyrite, showing significant adsorption capacity. Under optimal conditions, the adsorption capacities for the dyes were 349 mg g(-1) and 97 mg g(-1), respectively.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Applied
Agata Wawrzynczak, Sylwia Jarmolinska, Izabela Nowak
Summary: In this study, ordered nanostructured KIT-6 silica with different numbers of sulfonic groups were synthesized. The amount of the functional group precursor used affected the structural and textural parameters of the synthesized materials. The samples modified by grafting exhibited a stable mesoporous structure, while the ones synthesized by co-condensation showed characteristics of KIT-6 materials. The developed synthesis procedures yielded potential solid acid catalysts with desirable catalytic performances.
Article
Chemistry, Physical
Yifan Sun, Ye Lv, Wei Li, Jinli Zhang, Yan Fu
Summary: In this study, PtRu electrocatalysts were fabricated on carbon paper via cyclic electrodeposition for the electrocatalytic hydrogenation (ECH) of phenol. The Pt3Ru3 catalyst exhibited excellent activity and stability for the conversion of phenol to cyclohexanol at ambient temperature and various current densities. The in situ Raman spectroscopy and kinetic study revealed the hydrogenation mechanism of phenol over Pt3Ru3 in acidic electrolyte, providing an effective electrochemical strategy for the facile construction of durable electrode materials and efficient phenol hydrogenation.
JOURNAL OF CATALYSIS
(2024)
Article
Chemistry, Physical
Amir Shahzad, Khezina Rafiq, Muhammad Zeeshan Abid, Naseem Ahmad Khan, Syed Shoaib Ahmad Shah, Raed H. Althomali, Abdul Rauf, Ejaz Hussain
Summary: Photocatalytic hydrogen production through water splitting is an effective method for meeting future energy demands. In this study, researchers synthesized a 1 % Ag2S/Cu2S co-doped CdZnS catalyst and found that it can produce hydrogen at a higher rate. The co-doping of Ag2S and Cu2S in the CdZnS catalyst showed a synergistic effect, with Ag2S promoting oxidation reactions and Cu2S promoting reduction reactions.
JOURNAL OF CATALYSIS
(2024)
