Article
Chemistry, Physical
Samer Abdulridha, Yilai Jiao, Shaojun Xu, Rongxin Zhang, Zhongyuan Ren, Arthur A. Garforth, Xiaolei Fan
Summary: Mesoporous Y zeolites were prepared using bottom-up templating and top-down post-synthetic treatment methods, with the latter showing more effective intracrystalline mesoporosity introduction using microwave-assisted chemical treatment, where nanocrystalline cellulose was found to be a more suitable template than carbon nanotubes.
APPLIED CATALYSIS A-GENERAL
(2021)
Article
Chemistry, Applied
Samer Abdulridha, Rongxin Zhang, Shaojun Xu, Aleksander Tedstone, Xiaoxia Ou, Jiacheng Gong, Boyang Mao, Mark Frogley, Carlo Bawn, Zhaoxia Zhou, Xinran Zhang, Sarayute Chansai, Stuart M. Holmes, Christopher Hardacre, Arthur A. Garforth, Sihai Yang, Yilai Jiao, Xiaolei Fan
Summary: A low-cost and highly energy efficient microwave-assisted chelation method was developed for the post-synthetic modification of synthetic zeolites, leading to the formation of hierarchical structures within minutes. The hierarchical Y zeolites prepared using this method exhibited exceptional specific external surface areas and mesopore volumes, showing significantly improved catalytic activities in reactions involving large substrates like catalytic cracking and hydrocracking of plastics.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Chemistry, Applied
Rongxin Zhang, Run Zou, Wei Li, Yabin Chang, Xiaolei Fan
Summary: The study systematically investigated the effects of microwave-assisted dealumination and subsequent alkaline treatment on the physiochemical properties of Y zeolite. The findings revealed the different dealumination mechanisms of the microwave-assisted method using different agents, providing important insights for the further development of effective microwave methods and the production of mesoporous zeolites.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Chemistry, Applied
Rujito S. R. Suharbiansah, Kamila Pyra, Michael Liebau, David Poppitz, Kinga Gora-Marek, Roger Glaser, Magdalena Jablonska
Summary: Mesopores were successfully introduced into zeolite Y through sequential treatment, and the resulting Cu2+-modified materials exhibited similar catalytic performance in NH3-SCR of NOx. Rapid scan FT-IR analysis revealed the rate-determining step in the catalytic reaction.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Chemistry, Inorganic & Nuclear
Hardik Koshti, Mahuya Bandyopadhyay, Mukesh Kumar, Nao Tsunoji, Rajib Bandyopadhyay
Summary: Hierarchical micro-mesoporous zeolites with different pore structure were synthesized using post-synthetic modification with acid and base. The structural changes were investigated through various characterization techniques, and the acidic characteristics of the materials were evaluated. In the toluene alkylation reaction, the base-treated samples showed higher mesoporous pore volume and better catalytic performance.
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Xiaoli Jia, Jingang Jiang, Shihui Zou, Lu Han, Haiyin Zhu, Qing Zhang, Yue Ma, Peng Luo, Peng Wu, Alvaro Mayoral, Xinbao Han, Jun Cheng, Shunai Che
Summary: The development of materials integrated with ultrasmall multi-metal nanoparticles (UMMNs) and mesoporous zeolite is a significant challenge in chemistry and materials science. A novel trifunctional surfactant was designed to synthesize UMMNs confined in the zeolite matrix, exhibiting improved catalytic performance.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Applied
Wenhao Cui, Dali Zhu, Juan Tan, Nan Chen, Dong Fan, Juan Wang, Jingfeng Han, Linying Wang, Peng Tian, Zhongmin Liu
Summary: Mesoporous high-silica zeolite Y, with improved accessibility of acid sites and mass transport properties, is a highly desired catalytic material for various industries. Its direct synthesis, named MSY, exhibits excellent catalytic cracking performance and thermal stability. The MSY-based catalyst demonstrates enhanced conversion and gasoline yield in cracking reactions compared to commercial ultra-stable Y and mesoporogen-free counterparts.
CHINESE JOURNAL OF CATALYSIS
(2022)
Article
Chemistry, Multidisciplinary
Minseok Song, Eunji Eom, Jae Won Shin, Hae Sung Cho, Jeong-Chul Kim, Changbum Jo
Summary: We present a general synthetic approach for encapsulating metal nanoparticles within preformed zeolites using post-synthetic modification. The encapsulation process involves supporting anionic or cationic precursors onto the zeolite framework using a bi-grafting agent, resulting in the formation of small and uniform nanoparticles. The encapsulation provides protection against thermal sintering and coke fouling, leading to high catalytic performance in hydroisomerization and methane decomposition.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Masayoshi Miyazaki, Hiroshi Saito, Kiya Ogasawara, Masaaki Kitano, Hideo Hosono
Summary: The base strength of oxide catalysts is determined by the electron charge distribution between cations and anions. This study demonstrates the enhancement of catalytic basicity through selective doping of nitride ions at oxygen vacancy sites. The formation of oxynitride creates strong Lewis base sites that facilitate catalytic activation and improve reaction efficiency.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Biochemistry & Molecular Biology
Valentina Verdoliva, Giuseppe Digilio, Michele Saviano, Stefania De Luca
Summary: This paper presents a chemoselective and mild procedure for converting a peptide cysteine residue into lanthionine via S-alkylation on aziridine substrates. The method relies on a post-synthetic protocol promoted by molecular sieves and is assisted by microwave irradiation, providing a valuable alternative to the stepwise approach of incorporating lanthionine precursor into peptides.
Article
Chemistry, Multidisciplinary
Margherita Cavallo, Melodj Dosa, Natale G. Porcaro, Francesca Bonino, Marco Piumetti, Valentina Crocella
Summary: The CO2 adsorption performances of Linde-Type A (LTA) and natural Clinoptilolite (Clino) zeolites were investigated and compared. The ion-exchange procedure enhanced the adsorption capacity of the synthetic zeolite, while no significant improvement was observed for the natural one. Both synthetic and natural zeolites were affected by the cation exchange process in terms of CO2 adsorption reversibility. Natural Clino showed interesting CO2 adsorption performances at medium-high temperature and proved the presence of Fe2+ ions responsible for its strong interaction with CO2. The low cost and availability in shaped form make natural Clino a promising material for real CCS technologies.
JOURNAL OF CO2 UTILIZATION
(2023)
Review
Biochemistry & Molecular Biology
Efren Garcia-Baez, Itzia I. Padilla-Martinez, Feliciano Tamay-Cach, Alejandro Cruz
Summary: This article discusses the attractiveness of heterocyclic chemistry in the field of organic chemistry, focusing on the importance of nitrogen-containing heterocyclic compounds in biological activity and processes, as well as recent advances in the study of reactions of o-aminothiophenoles and their disulfides with carboxylic acids, esters, etc.
Review
Chemistry, Multidisciplinary
Jadab Majhi, Gary A. Molander
Summary: Formic acid salts have shown diverse capabilities in photoredox catalysis, acting as reductants, carbonyl sources, and reagents for hydrogen atom transfer. The CO2·- radical anion derived from formate exhibits strong reductant properties, allowing for the cleavage of C-X and C-O bonds, as well as playing a crucial role in carboxylation reactions. The multifunctionality of formic acid salts opens up exciting possibilities in synthetic organic chemistry.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Applied
Nolan C. Kovach, Glory A. Russell-Parks, Brian G. Trewyn
Summary: Carbon-based materials are widely used and their study at the nanoscale, particularly porous carbons, shows great potential and importance. Mesoporous carbons offer sufficient volume and surface area to host various guest species, and surface modifications can create new physicochemical functionalities.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Energy & Fuels
Min-Yee Choo, Lee Eng Oi, Yu-Chuan Lin, Tau Chuan Ling, Eng-Poh Ng, Wei-Hsin Chen, Chin Kui Cheng, Joon Ching Juan
Summary: Energy is essential in the 21st century, with most of it being supplied by fossil fuels. However, the environmental and sustainability issues associated with burning fossil fuels have led to the production of biofuels. In this study, two synthesis strategies were used to address the diffusion limitation of conventional zeolite Y, resulting in the preparation of hierarchical nanosized zeolite Y. The best hierarchical nanosized zeolite Y (MY0.15) showed good deoxygenation performance and reusability under H-2 free conditions.
Article
Energy & Fuels
Zijian Wang, Rongxin Zhang, Jieguang Wang, Zhongwei Yu, Yanjuan Xiang, Lingjiang Kong, Hongquan Liu, Aizeng Ma
Summary: This study manufactured different hierarchical ZSM-5 zeolites and characterized their structure properties and acidities. It was found that alkaline treatment with NaHCO3 could adjust acidity, form hierarchical structures, and enhance the catalytic ability and anti-coke deposition performance. Among the catalysts, ZNaHCO(3) showed the highest n-pentane conversion and light olefins selectivity.
Article
Chemistry, Applied
Rongxin Zhang, Run Zou, Wei Li, Yabin Chang, Xiaolei Fan
Summary: The study systematically investigated the effects of microwave-assisted dealumination and subsequent alkaline treatment on the physiochemical properties of Y zeolite. The findings revealed the different dealumination mechanisms of the microwave-assisted method using different agents, providing important insights for the further development of effective microwave methods and the production of mesoporous zeolites.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Engineering, Chemical
Xinrui Wang, Wei Guo, Shanshan Xu, Huanhao Chen, Xiaolei Fan
Summary: Flow arrangement in a dielectric barrier discharge (DBD) plasma reactor plays a crucial role in multi-component gas reactions. A stainless-steel membrane distributor-type DBD reactor was utilized to study the effect of gas flow arrangements on plasma-assisted CH4/CO2 co-conversion to syngas. The DBD reactor with CO2 fed in the quartz wool-packed discharge zone and CH4 distributed via the membrane exhibited excellent stability and performance, achieving steady CO2/CH4 conversions of approximately 25%/20%, H2/CO selectivities of around 50%/32%, H2/CO molar ratio of 0.9-1.1, and energy efficiency of about 0.20 mmol.kJ(-1) based on the conversion of feed gases.
Article
Chemistry, Applied
Jingjing Li, Sarayute Chansai, Christopher Hardacre, Xiaolei Fan
Summary: The water gas shift (WGS) reaction is crucial for various industrial processes, but achieving both thermodynamic equilibrium conversion and fast kinetics under conventional conditions is challenging. Non-thermal plasma (NTP) processes have been proposed to improve the kinetics at low temperatures and achieve favorable thermodynamic conversion. This review critically examines the progress in NTP-assisted WGS reactions, including catalytic and non-catalytic systems, and evaluates the concept of reaction-separation integration using novel membrane reactors to enhance hydrogen production.
Article
Engineering, Environmental
Yao Zhang, Boji Wang, Zhaoqi Ji, Yilai Jiao, Yan Shao, Huanhao Chen, Xiaolei Fan
Summary: Plasma-assisted catalytic CO2 methanation is a promising method for utilizing CO2 under mild conditions, and it requires rational design of catalysts and processes. In this study, bimetallic NiFe_n/(Mg, Al)Ox catalysts were developed and the effects of Ni and Fe atomic ratio and reduction temperature were systematically investigated. The results showed that higher reduction temperature promoted the formation of Ni3Fe alloy and surface oxygen vacancies, leading to increased CO2 adsorption ability. The NiFe0.1/(Mg, Al)Ox-800 catalyst exhibited excellent catalytic performance with 84.7% CO2 conversion and 100% CH4 selectivity in plasma-assisted catalysis. Additionally, response surface methodology (RSM) was employed to optimize the plasma-catalytic CO2 methanation process for the first time.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Zhenyuan Yang, Yanan Guan, Lei Xu, Yangtao Zhou, Xiaolei Fan, Yilai Jiao
Summary: This work presents a method to prepare hierarchical titanium silicalite-1 (TS-1) zeolites with high tetra-coordinated framework Ti species content. The synthesis involves the preparation of aged dry gel and the treatment of the aged dry gel with tetrapropylammonium hydroxide (TPAOH) solution under hydrothermal conditions. The systematic studies show that specific synthesis conditions enable the synthesis of hierarchical TS-1 with desirable physiochemical properties.
CRYSTAL GROWTH & DESIGN
(2023)
Article
Biotechnology & Applied Microbiology
Jian Na, Hong Li, Xia Liu, Xiaoxia Ou, Xiaolei Fan, Xin Gao
Summary: Based on published experimental data, empirical correlations were developed in this study to predict the hydrodynamic performance and mass transfer efficiency of SiC ceramic foam monolithic trays. These new correlations take into account the tray structure parameters (such as open cell diameter and tray thickness) and the operation conditions (such as liquid and vapor flow rates), and the predicted results agree well with the experimental results. The availability of such empirical correlations can be beneficial for the chemical engineering design of practical distillation processes based on SiC foam monolithic trays.
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
(2023)
Article
Multidisciplinary Sciences
Monica J. Mendoza-Castro, Zhipeng Qie, Xiaolei Fan, Noemi Linares, Javier Garcia-Martinez
Summary: Hybrid zeolites with optimized catalytic performance can be conveniently prepared by interrupting the interconversion of different zeolite types at different times. These materials, named Hybrid Zeolites, show significantly improved selectivity and conversion compared to commercial zeolites FAU and MFI.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Lan Lan, Helen Daly, Rehana Sung, Floriana Tuna, Nathan Skillen, Peter K. J. Robertson, Christopher Hardacre, Xiaolei Fan
Summary: This study investigated the mechanistic details of glucose photoreforming over TiO2 and Pt/m-TiO2 catalysts. The alpha-scission mechanism of glucose oxidation was confirmed by the formation of arabinose and formic acid in the initial oxidation step. The selectivity to sugar products and formic acid differed over Pt/TiO2 and TiO2, with Pt/TiO2 showing lower selectivity to formic acid due to enhanced adsorption/conversion. In situ ATR-IR spectroscopy revealed the presence of molecular formic acid and formate on the surface of both catalysts, suggesting the dominance of formic acid oxidation in glucose photoreforming.
Article
Engineering, Chemical
Ming-Liang Qu, Martin J. Blunt, Xiaolei Fan, Sajjad Foroughi, Zi-Tao Yu, Qingyang Lin
Summary: A dual-network model (DNM) was developed to study incompressible water flow and heat transport from pore-scale to mesoscale. It considered the effect of temperature-dependent fluid viscosity and successfully simulated the pore-scale fluid flow and heat transfer. By varying the pore volume, the effect of bed porosity on transport processes was demonstrated, providing insights into the trade-off between flow conditions and heat transfer.
Review
Chemistry, Applied
Shanshan Xu, Huanhao Chen, Xiaolei Fan
Summary: Non-thermal plasma catalysis (NTP-catalysis) has the unique ability to enable challenging chemical conversions under mild conditions. However, catalyst design considering the features of NTP activation has not been achieved. This review critically evaluates previous research on catalyst design for selected NTP-catalytic systems and provides suggestions for rational design of bespoke catalysts for NTP-catalysis.
Article
Engineering, Chemical
Zhipeng Qie, Zhaoqi Ji, Huan Xiang, Xinhan Zhang, Abdullah Alhelali, Lan Lan, Hassan Alhassawi, Guangbo Zhao, Xiaoxia Ou, Xiaolei Fan
Summary: Hydrophobic Beta zeolites were developed using a microwave-assisted post-synthetic treatment method. The most hydrophobic Beta zeolite showed the highest benzene adsorption capacity per surface area. The modified Beta zeolites could be easily regenerated and maintained their physiochemical properties and adsorption capacity.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Yani Peng, Boya Qiu, Shengzhe Ding, Min Hu, Yuxin Zhang, Yilai Jiao, Xiaolei Fan, Christopher M. A. Parlett
Summary: This study presents the development of a simple synthesis method for preparing bimetallic AuPd alloy catalysts for selective oxidation of 5-HMF to FDCA. Under strong base conditions, the cooperation of Pd and Au promotes FDCA formation but also leads to the formation of undesired by-products. Under weak base conditions, increasing the Au loading enhances FDCA productivity and mass balances.
Article
Physiology
Xiu-Li Wang, Yi-Tong Xu, Shu-Li Zhang, Xiao-Yan Zhu, Hong-Xia Zhang, Yu-Jian Liu
Summary: This study investigates the impact of dysregulation of hydrogen sulfide (H2S) production on the senescence of alveolar type II (AT2) cells and the communication between AT2 and fibroblasts. The results show that H2S can attenuate AT2 cell senescence and suppress senescence-associated secretory phenotype (SASP) of AT2 cells via the inhibition of p53/p21 pathway, leading to the suppression of fibroblast proliferation and transdifferentiation. The findings suggest that abnormal H2S synthesis may contribute to the development of pulmonary fibrosis by promoting the activation loop involving senescent AT2 cells and activated fibroblasts.
Article
Chemistry, Applied
Qijie Jin, Shaowei Chen, Xuelu Meng, Ranran Zhou, Mutao Xu, Mengfei Yang, Haitao Xu, Xiaolei Fan, Huanhao Chen
Summary: In this study, a Ni/ZrO2 catalyst was developed for methanol steam reforming and H2 production. It was found that non-thermal plasma could initiate methanol conversion, while the addition of the composite catalyst did not significantly improve the reaction. The thermal catalytic system was inactive at 90°C, but the Ni/ZrO2 catalyst showed satisfactory activity at 400°C.