Article
Chemistry, Applied
Haipeng Chen, Chenwei Wang, Mengyang Zheng, Chenlei Liu, Wenqiang Li, Qingfeng Yang, Shixue Zhou, Xun Feng
Summary: Catalytic hydrogenation of CO2 using renewable hydrogen is crucial for reducing greenhouse gas emissions and producing industrial chemicals. This study presents a Co-Fe bimetallic catalyst prepared through reactive ball-milling, which exhibits high activity and selectivity for the hydrogenation of CO2 to valuable hydrocarbons. The catalyst achieves superior results compared to previous Fe-based catalysts, with a selectivity of 57.3% for light olefin (C2=-C4=) and 22.3% for C5+ species at a CO2 conversion of 31.4%. The CO2 activation is enhanced by the formation of the CoFe phase, while in-situ Co2C and Fe5C2 promote the C-C coupling reaction. This strategy contributes to the development of efficient catalysts for CO2 hydrogenation.
JOURNAL OF ENERGY CHEMISTRY
(2023)
Article
Chemistry, Physical
Wangbing Sun, Mingxuan Sun, Xianglong Meng, Yongqiang Zheng, Ziyang Li, Xiangzhi Huang, Muhammad Humayun
Summary: A series of alkynyl carbon functionalized N-TiO2 was successfully prepared by ball milling. The alkynyl carbon materials were successfully doped into N-TiO2, and the catalytic performance of alkynylated N-TiO2 for various organic dyes and NH3 production was significantly enhanced under visible light. The introduction of alkynyl carbon into semiconductor materials is a promising strategy for improving their photocatalytic properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Polymer Science
Rocco Di Girolamo, Chiara Santillo, Anna Malafronte, Miriam Scoti, Fabio De Stefano, Giovanni Talarico, Geoffrey W. Coates, Claudio De Rosa
Summary: Isotactic polypropylene-block-polyethylene block copolymers were synthesized and their crystallization behavior was studied. It was found that polyethylene blocks crystallize first, followed by the nucleation of polypropylene blocks. The polyethylene lamellar stacks have a higher periodicity of 30 nm, while the polypropylene lamellar stacks have a lower periodicity of 11-12 nm. The crystallization of the copolymer drives microphase separation and leads to a lamellar morphology.
Article
Agricultural Engineering
Jiayi Tang, Yongfei Ma, Chenyu Zeng, Lie Yang, Song Cui, Suli Zhi, Fengxia Yang, Yongzhen Ding, Keqiang Zhang, Zulin Zhang
Summary: This study proposes a novel adsorbent (BMFA-BC) by using a facile ball milling technology to tailor Fe-Al oxides-laden bagasse biochar. The increased exposure of Fe-Al oxides and enhanced functional groups by ball milling result in a high adsorption capacity of BMFA-BC for aqueous tetracycline at 298 K, reaching up to 116.6 mg g-1. The adsorption performance is influenced by temperature.
BIORESOURCE TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Ruth D. Rittinghaus, Johannes Zenner, Andrij Pich, Moshe Kol, Sonja Herres-Pawlis
Summary: This article introduces a iron guanidine complex catalyst for the synthesis of copolymers with different microstructures. The catalyst exhibits high activity and fast polymerization of lactide, glycolide, and epsilon-caprolactone. By changing the polymerization set-up or sequentially adding monomers, both block and random-like copolymers, as well as copolymers with highly dispersed repeating unit distributions, can be obtained. This research represents an important step towards biocompatible polymers with tailor-made properties, contributing to a sustainable and circular material flow.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Engineering, Chemical
Chao Wang, Huimin Hu, Min Chen, Junwei Huang, Qing Shi, Chaocheng Zeng, Zixian Deng, Qiwu Zhang
Summary: The stockpiling of easily leachable barium-containing slag poses an unpredictable risk to the environment and human health. Current research on barium ion (Ba2+) contamination treatment mainly focuses on end-of-pipe treatment, with few options for front-end sequestration. This study successfully used gypsum dihydrate to passivate barium carbonate (BaCO3) and prevent barium leaching from landfilling, providing a potential green process for treating waste and tailings.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Matthew T. Whited, Jia Zhang, Anna M. Conley, Senjie Ma, Daron E. Janzen, Daniela Kohen
Summary: The research demonstrates a metal/ligand cooperative approach to reducing small molecules using metal silylene complexes, achieving net two-electron transformations through one-electron redox processes. Silicon activates incoming substrates and mediates the generation of bimetallic products with two metal centers, suitable for 3d metals.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Physical
Xinyan Li, Muhua Chen, Guangyao Li, Ping Wang
Summary: Construction of heterophase junction is an effective approach to enhance catalytic performance, but its potential in formaldehyde pollution remediation is understudied. In this study, we report the fabrication, catalytic properties, and mechanism of an alpha/A-MnO2 heterophase junction catalyst for HCHO oxidation. The catalyst exhibited exceptional performance and stability, outperforming most reported MnO2-based catalysts.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Chanjuan Zhang, Philipp Gotico, Regis Guillot, Diana Dragoe, Winfried Leibl, Zakaria Halime, Ally Aukauloo
Summary: At the core of carbon monoxide dehydrogenase (CODH) active site, two metal ions and hydrogen bonding from amino acids facilitate the interconversion between CO2 and CO. A designed molecular catalyst with a bimetallic iron complex and hydrogen bonding interactions showed improved selectivity and stability in heterogeneous CO2 reduction to CO. X-ray structures revealed the compromise between rigidity and flexibility of the catalyst in accommodating CO2 capture, activation, and reduction.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Energy & Fuels
Xinqi Yao, Shuaishuai Yuan, Chuandong Li, Lei Wang, Xinhai Yu, Pengfei Tian, Shan-tung Tu
Summary: Methanol steam reforming (MSR) is an efficient method for hydrogen production in fuel cell applications, and Pd-Zn catalysts are commonly used. To minimize Pd loading, PdZn nanoparticles (NPs) and Pd1/ZnO single-atom catalysts (SACs) were prepared through ball milling. The 2PdZn/Al2O3 NP catalyst exhibited excellent antioxidation ability and stability at 350 degrees C, with methanol conversion maintained at 99.5% and CO concentration below 0.71%. It showed promising potential for on-board hydrogen production for fuel cell vehicles.
Review
Chemistry, Physical
Leong Kean Wei, Shayfull Zamree Abd Rahim, Mohd Mustafa Al Bakri Abdullah, Allice Tan Mun Yin, Mohd Fathullah Ghazali, Mohd Firdaus Omar, Ovidiu Nemes, Andrei Victor Sandu, Petrica Vizureanu, Abdellah El-hadj Abdellah
Summary: In the pursuit of achieving zero emissions, recycling metal waste from industries and workshops through the concept of waste-free is crucial. Metal recycling helps conserve natural resources and requires less energy compared to production from virgin raw materials. The use of metal scrap in rapid tooling for injection molding is a viable approach, and mechanical alloying has the potential for sustainable powder production. However, parameter factors such as ball milling type, ball-to-powder ratio, rotation speed, and process control agent can impact the quality and characteristics of the produced metal powders. Further research is needed to optimize the process and explore potential future applications.
Article
Polymer Science
Chunwei Zhuo, Han Cao, Huai You, Shunjie Liu, Xianhong Wang, Fosong Wang
Summary: A photothermal strategy was developed using visible light as an external stimulus for the copolymerization of carbon dioxide and epoxides. This strategy showed enhanced polymerization activity and demonstrated spatial-temporal control.
Article
Engineering, Chemical
Purvam Mehulkumar Gandhi, Siva Kumar Valluri, Mirko Schoenitz, Edward Dreizin
Summary: This study investigated the effects of liquid process control agents (PCA) on the properties of milled powders during high-energy ball milling. Correlations between different PCA properties and milling outcomes were identified. It was found that PCA density had an impact on particle and crystallite sizes, but its effect was less significant compared to other parameters. Particle size was strongly correlated with PCA proton affinity and surface tension for Bi2O3 and CuO, respectively, while crystallite size was most strongly correlated with PCA dynamic viscosity and density for Bi2O3 and CuO, respectively.
ADVANCED POWDER TECHNOLOGY
(2022)
Review
Engineering, Environmental
Abhinav Sharma, Prakash M. Gore, Balasubramanian Kandasubramanian
Summary: Carbon dioxide pollution is the primary cause of climate change and global warming. Developing various catalysts for electrochemical reduction of CO2 is a promising approach to mitigate the impacts of CO2 emissions.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Physical
Cheng Wang, Huiyan Xu, Chiyuan Wang, Tongyao Liu, Shuaijun Yang, Yong Nie, Xiaodan Guo, Xin Ma, Xuchuan Jiang
Summary: In this study, VO2 (B) nanobelts were successfully transformed into spherical VO2 (M/R) nanoparticles using the ball milling method for the first time. The obtained VO2 (M/R) nanoparticles showed good optical properties and have potential applications in smart windows.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
