Article
Environmental Sciences
Zhang-Hong Wan, Jing Guan, Chun-Miao Zhang, Wen-Qing Fei, Lin Wang, Shu-Guang Wang, Xue-Fei Sun
Summary: In this study, a scalable antibiofouling surface with improved permeability and fouling resistance was formed on a PEI-ZIF-PAA membrane using a layer-by-layer assembly technique. The PEI-ZIF-PAA membrane exhibited a satisfactory water flux of 120.78 LMH, which was 46.97% higher than that of the pristine PES membrane. This study indicates that ZIF-8 nanocrystals are promising materials for fabricating novel membranes for sewage treatment.
Article
Materials Science, Multidisciplinary
An-Ya Lo, Yi-Chen Chung, Pei-Jie Xie, Hengameh Delbari, Zone-Hank Yang, Fariborz Taghipour
Summary: In this study, we developed and optimized a mesoporous photocatalyst for CO2 photoreduction by integrating TiO2 with a CMK-3 template and conducting silver doping. The effects of Lewis acid sites, Lewis base sites, and charge-carrier recombination rates on the CO2 photoreduction efficiency and product selectivity were investigated. The engineered photocatalyst, S-Ag1.0TC470, exhibited superior CH4 selectivity and production yield compared to commercial P25.
APPLIED MATERIALS TODAY
(2023)
Article
Chemistry, Multidisciplinary
Yi-Feng Lin, Yu-Rou Lai, Hsiang-Ling Sung, Tsair-Wang Chung, Kun-Yi Andrew Lin
Summary: Novel heterogeneous catalysts with both Lewis acidic and basic sites were developed for the CO2/epoxide cycloaddition reaction without the need for toxic solvents. By grafting APTMS onto Zr-Mg mixed oxide aerogels, the yield of propylene carbonate reached 93.1%, indicating great potential for future industrial applications in CO2 reduction.
Article
Chemistry, Multidisciplinary
Philip Netzsch, Regina Stroh, Florian Pielnhofer, Ingo Krossing, Henning A. Hoeppe
Summary: Borosulfates offer fascinating structures and properties beyond pure silicate analogy. Mg-3[H2O -> B(SO4)(3)](2) is the first borosulfate with a boron atom coordinated by three tetrahedra, exhibiting higher Lewis and Brønsted acidity.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Multidisciplinary
Sen Jin, Wei Shao, Shichuan Chen, Lei Li, Shu Shang, Yan Zhao, Xiaodong Zhang, Yi Xie
Summary: This study proposes an in-plane heterostructure strategy to construct Lewis acid-base sites for efficient CO2 activation, and demonstrates the excellent performance of this strategy in CO2 fixation reactions.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Multidisciplinary
Byung Heung Park, Hun Yong Shin, Bong-Seop Lee
Summary: The electropositivity of carbon atom in CO2 allows it to act as a proton acceptor or electron acceptor in Lewis acid-base interactions with organic chemicals. High-pressure CO2/alcohol solvent systems are vital for supercritical extraction, dehydration of alcohols, and extraction of natural products. Understanding the Lewis acid-base interactions between CO2 and alcohols is crucial for the solvation process under high-pressure conditions and the development of thermodynamic models.
JOURNAL OF CO2 UTILIZATION
(2021)
Article
Chemistry, Physical
Yuejiao An, Yanfeng Zhang, Jinni Shen, Hong Cui, Xuxu Wang
Summary: This study presents the preparation of La-substituted BiOBr as an efficient photocatalyst for CO2 reduction, which exhibits enhanced adsorption and activation capacity for CO2 molecules.
SURFACES AND INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Heekyoung Choi, Soichiro Ogi, Naoki Ando, Shigehiro Yamaguchi
Summary: This study reports kinetically controlled supramolecular polymerization of boron-containing p-conjugated molecules using a seeding method based on dual trapping of a metastable state. The formation of helical supramolecular nanostructures with intense J-type aggregate emission was achieved through cooperative supramolecular polymerization. The presence of a Lewis acid-base complex enhanced the stabilization of the metastable monomeric state, allowing for successful production of homogeneous nanofibers even at high concentrations.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Chemistry, Physical
Dapeng Wu, Jing Guo, Hongju Wang, Xilin Zhang, Yonggang Yang, Can Yang, Zhiyong Gao, Zichun Wang, Kai Jiang
Summary: Boron and nitrogen co-doped titanium dioxide nanosheets with high surface area were synthesized using ammonia borane as the green regent, achieving excellent performance in photocatalytic reduction of carbon dioxide. Transient optical measurements indicated that the samples with rich defect states and elevated conduction band position could enhance light harvesting efficiency. It was suggested that Lewis acid-base pairs on the material could substantially increase the activation of inert CO2, facilitating its photoreduction with hydrogen.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Nanoscience & Nanotechnology
Wei-Yong Li, Zhi-Hong Luo, Xiang Long, Jia-Ying Long, Chi Pang, Huan Li, Xing Zhi, Bin Shi, Jiao-Jing Shao, Yan-Bing He
Summary: The incorporation of novel two-dimensional clay nanosheets with abundant cation vacancies in polymer electrolytes enhances ionic conductivity, lithium transference number, dissociation of lithium salts, and hopping mechanism of lithium ions. This results in high performance polymer electrolytes with improved characteristics.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Xue-Rui Tian, Xiao-Lei Jiang, Sheng-Li Hou, Zhuo-Hao Jiao, Jie Han, Bin Zhao
Summary: This study investigates the influence of Lewis acid-base sites in catalysts on the chemical fixation of CO2. It demonstrates that with the introduction of Lewis base sites, the catalytic ability of a metal-organic framework (MOF) is improved, leading to enhanced efficiency in the conversion of CO2.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Energy & Fuels
Xiushuai Guan, Xiaochao Zhang, Changming Zhang, Rui Li, Jianxin Liu, Yunfang Wang, Yawen Wang, Caimei Fan, Zhong Li
Summary: A simple solution coprecipitation strategy was proposed to synthesize CeO2 nanoparticles derived from Ce-metal organic frameworks (MOFs) in order to break the thermodynamic equilibrium and achieve efficient activation of CO2/CH3OH under a photothermal system. The CeO2-M-5 nanoparticles exhibited the highest DMC yield of 2.52 mmol(DMC) g(cat)(-1), which was 3.26 times higher than CeO2-C nanoparticles obtained by high-temperature calcination. Additionally, the DMC yield of CeO2-M-5 nanoparticles was increased by 10% under the photothermal synergistic system compared to the thermocatalytic system. The superior catalytic performance was attributed to the abundant Lewis acid-base sites, excellent light absorption capacity, and hydrophobicity of the CeO2-M-5 nanoparticles.
Article
Chemistry, Physical
Yanqing Di, Yiheng Chen, Yang Cao, Xiaowei Cui, Yongliang Liu, Chunsheng Zhou, Youying Di
Summary: A dual-channel material NUC-58 was synthesized, consisting of wave-like chains and [Yb(CO2)4(H2O)] units. It exhibits excellent physical and chemical properties and acts as a catalytic material for cycloaddition reactions and a sensor for Cu2+ detection. This study highlights the potential of pyridine-containing polycarboxylic acid ligands and rare earth ions assembled microporous MOFs as versatile materials.
Article
Chemistry, Physical
Bohong Chang, Bo Li, Lu Pan, Hui Li, Lian Wang, Lin Fu, Zihao Li, Longwei Yin
Summary: This study introduces an eco-friendly polyethylene glycol (PEG) polymer to effectively regulate the nucleation and growth of tin-based perovskite grains, leading to the fabrication of perovskite films with lower defect density, higher coverage, and improved performance and stability of photovoltaic devices. The proposed strategy demonstrates significant enhancement in film crystallization behavior, coverage, and carrier lifetime, resulting in an optimized device with high efficiency and long-term stability.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Chemistry, Applied
S. M. Orlyk, M. R. Kantserova, V. I. Chedryk, P. I. Kyriienko, D. Y. Balakin, Y. Millot, S. Dzwigaj
Summary: Ga(Ta,Nb)SiBEA zeolites with Ta(V), Nb(V), and Ga(III)-single sites were prepared using a two-step post-synthesis procedure. The acid-base properties of these zeolite catalysts were studied, and their catalytic performance in the oxidative dehydrogenation of propane to propylene was tested, showing a high propene selectivity. The presence of well-dispersed framework Ga(III) with weak and medium strength Lewis acid sites played a key role in the target process.
JOURNAL OF POROUS MATERIALS
(2021)
Article
Chemistry, Physical
P. Belmonte, J. M. Garcia-Vargas, J. F. Rodriguez, I. Garrido, M. T. Garcia, M. J. Ramos
Summary: In this study, four polythiourethane films with different types of polyols and isocyanates were synthesized, characterized, and foamed. The results showed that the type of isocyanate greatly influenced the crystallinity and stiffness of the polymers, while the type of polyol modified the FT-IR spectra and the decomposition curve of the material with temperature. Furthermore, the choice of isocyanate also affected the properties of the foams obtained from the polymeric material.
JOURNAL OF SUPERCRITICAL FLUIDS
(2024)
Article
Chemistry, Physical
Xutao Zhu, Jianguo Yan, Shouchun Liu, Fengling Zhu
Summary: This study experimentally assessed the hydrodynamic characteristics of supercritical-pressure R134a in a horizontal circular tube. It was found that the hydrodynamic characteristic curve of R134a under supercritical pressure does not have a negative-slope region but a transition region. The transition region becomes more evident with increasing heat flux, while it weakens with increasing pressure and inlet temperature. Moreover, the onset of the transition region shifts in the direction of high mass flow rate with increasing heat flux.
JOURNAL OF SUPERCRITICAL FLUIDS
(2024)
Article
Chemistry, Physical
Stefania Mottola, Iolanda De Marco
Summary: In this study, corticosteroids were micronized with cyclodextrin using Supercritical Assisted Atomization (SAA), resulting in spherical micrometric particles with improved dissolution time.
JOURNAL OF SUPERCRITICAL FLUIDS
(2024)
Article
Chemistry, Physical
Honghai Liu, Yu Xie, Zhilan Li, Xiaokai Zhang
Summary: This study compared the effects of supercritical carbon dioxide dewatering (SCD) and conventional kiln drying (CKD) at a temperature of 55 degrees C on the dewatering rate, moisture transfer and distribution, shrinkage, and stress characteristics of bamboo strips. The results showed that SCD had a faster dewatering rate and lower shrinkage compared to CKD, but was less effective in reducing drying stress in bamboo.
JOURNAL OF SUPERCRITICAL FLUIDS
(2024)
Article
Chemistry, Physical
Tahmasb Hatami, Ozan N. Ciftci
Summary: This study fills the gap in previous research by establishing a hierarchy of significance for factors affecting SFE profitability, providing a deeper understanding of how technical and economic factors impact profitability. The findings highlight that the SFE facility becomes profitable when the extractor capacity surpasses 42 L.
JOURNAL OF SUPERCRITICAL FLUIDS
(2024)
Article
Chemistry, Physical
Tingshan Guo, Chuang He, Zhiyuan Liang, Qinxin Zhao
Summary: The initial oxidation behavior of Fe10Cr and Fe20Cr alloys in supercritical H2O and supercritical CO2 with O2 has been investigated. The results show that O2 has the highest adsorption energy on FeCr alloys and reacts faster than H2O and CO2.
JOURNAL OF SUPERCRITICAL FLUIDS
(2024)
Article
Chemistry, Physical
Vikash Chandra Roy, Jin-Seok Park, Ahmed Redwan Haque, Md Sadek Ali, Hee-Jeong Lee, Byung-Soo Chun
Summary: This research aimed to valorize brewery spent grain (BSG) using subcritical water hydrolysis (SWH) modified by six different natural deep eutectic solvents (DES) and determining their bipotentialities. The findings showed that BSG hydrolysates obtained through DES-induced SWH contained high levels of sugars, proteins, flavonoids, phenolic compounds, and essential amino acids. The hydrolysates also demonstrated antimicrobial activities, and the presence of bioactive compounds was confirmed through FT-IR analysis. This comprehensive profiling of bioactive compounds from BSG using DES-mediated SWH can contribute to the efficient valorization of BSG for industrial purposes.
JOURNAL OF SUPERCRITICAL FLUIDS
(2024)
Article
Chemistry, Physical
Kailiang Zhang, Hanyu Wang, Tong Liu, Zhu Wang, Lvxing Wang, Ping Fan, Feng Chen, Mingqiang Zhong, Bozhen Wu, Shanqiu Liu, Jintao Yang
Summary: This study investigates the influence of foam cell structure on the electromagnetic interference shielding performance of conductive polymer composite foam. The results suggest that foamed composites exhibit improved EMI shielding performance, and bimodal cell foams have higher electric conductivity but lower EMI shielding compared to uniform cell foams.
JOURNAL OF SUPERCRITICAL FLUIDS
(2024)
Article
Chemistry, Physical
Jaromir Valtr, Petr Roztocil, David Dasek, Radek Musalek, Frantisek Lukac, Jakub Klecka, Marek Janata, Mariana Arnoult-Ruzickova, Eva Mistova, Ludek Jelinek, Petr Sajdl, Jan Macak
Summary: This paper focuses on the design of an experimental facility for in-situ electrochemical testing at supercritical water conditions, including the design of the electrode system and surface insulation coating for electrode leads.
JOURNAL OF SUPERCRITICAL FLUIDS
(2024)
Article
Chemistry, Physical
Richard Djimasbe, Mikhail A. Varfolomeev, Nailya M. Khasanova, Ameen A. Al-Muntaser, Rustam R. Davletshin, Muneer A. Suwaid, Gazinur Z. Mingazov
Summary: This study confirms the capability of supercritical water to generate active hydrogen that interacts with different fractions in unconventional feedstocks, leading to synthetic oil production during hydrothermal reactions. The findings suggest that a maximum yield of 16.78% can be achieved at a temperature of 380 oC and a reaction time of 1-12 hours.
JOURNAL OF SUPERCRITICAL FLUIDS
(2024)