Article
Polymer Science
Samson Lalhmangaihzuala, Zathang Laldinpuii, Chhakchhuak Lalmuanpuia, Khiangte Vanlaldinpuia
Summary: In this study, a biomass-waste-derived heterogeneous catalyst was prepared from waste orange peel for the depolymerisation of PET to its monomer, BHET. The catalyst showed excellent catalytic performance, depolymerising PET within 90 minutes and producing 79% recrystallised BHET. The ability to reuse the catalyst for multiple cycles without significant loss of activity and its environmentally-friendly nature make it a promising green route for PET recycling.
Article
Chemistry, Physical
Hao Sun, Chenzhe Xu, Xiaoting Yang, Lei Tao, Zheng Wang, Haitao Zhang, Xiang Ji, Juanjuan Ma, Lin Liu, Zhiwei Tong, Zhong Chen
Summary: A novel composite Pd@MgAl-LDH was prepared by using MgAl layered double hydroxide (LDH) as the host material and assembling the precursor (PdCl42-) with exfoliated LDH nanosheets followed by in-situ reduction. The heterogeneous catalyst exhibited evenly distributed Pd NPs with an average particle size of about 3.27 nm supported on LDH nanosheets. The Pd@MgAl-LDH catalyst showed excellent catalytic efficiency for the Heck reaction and could be reused 5 times without significant loss of catalytic activity.
APPLIED CLAY SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Jialei Du, Daili Xiang, Jie Chen, Hehuan Xia, Leichen Wang, Fushan Liu, Yiwei Zhao, Yuanyuan Zhang, Caixia Xu, Bin Wang
Summary: Nanoporous PdCu (NP-PdCu) is a competent self-supported heterogeneous catalyst prepared from a PdCuAl alloy precursor, suitable for Suzuki-Miyaura cross-coupling with high efficiency and yields, and can be reused multiple times without obvious loss of catalytic performance.
CHEMICAL COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Jian Hou, Wongi Jang, Jaehan Yun, Chan Young Park, Jun-Hyun Kim
Summary: This research utilizes oyster shell waste as a solid support to anchor gold nanoparticles, resulting in a highly selective, reactive, and recyclable catalyst for C-C bond forming reactions. The composite particles, consisting of bare gold nanoparticles incorporated in oyster shell powder, demonstrate great dispersity and stability in various solvents. The abundant carbonate groups on the oyster shell surfaces act as a base, while the bare surfaces of the gold nanoparticles act as catalytically reactive sites, leading to high reactivity and selectivity in the homocoupling of arylboronic acid.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Chemistry, Physical
Michael Martin Romo y Morales, Anthony Brunet-Manquat, Hadi Dib, Jean-Luc Rousset, Franck Morfin, Laurence Burel, Damien Bourgeois, Helena Kaper
Summary: This study uses electronic waste as an alternative source of palladium to prepare heterogeneous catalysts for methane oxidation. The research involves optimizing the leaching protocol to recover palladium from the waste and developing a suitable impregnation protocol from the strongly acidic leachate. The precipitation-deposition technique is found to be suitable for preparing catalysts from acidic media. The impact of Ba, Bi, and Ag impurities on catalytic performance is assessed and discussed through various analytical techniques.
Article
Chemistry, Multidisciplinary
Z. T. Laldinpuii, Chhakchhuak Lalmuanpuia, Samson Lalhmangaihzuala, Vanlalngaihawma Khiangte, Zodinpuia Pachuau, Khiangte Vanlaldinpuia
Summary: This study explores the valorization of biomass waste-derived orange peel ash (OPA) as a heterogeneous catalyst in aqueous aldol reactions and in promoting the methanolysis of poly(ethylene terephthalate) (PET) waste. The catalyst was characterized using various techniques to decode its chemical composition and was found to be effective in catalyzing reactions with minimal loss in catalytic activity over multiple cycles. The use of OPA offers a cost-free, eco-friendly and recyclable catalyst for greener C-C bond formation and PET waste recycling.
NEW JOURNAL OF CHEMISTRY
(2021)
Article
Engineering, Environmental
Zathang Laldinpuii, Samson Lalhmangaihzuala, Zodinpuia Pachuau, Khiangte Vanlaldinpuia
Summary: PET, as one of the most widely used polymeric materials, can be depolymerized using BLA derived catalyst, which is cost-free, environmentally friendly, and reusable for multiple cycles, making it an efficient and sustainable solution for plastic waste management.
Article
Chemistry, Physical
Carlos Lizandara-Pueyo, Xinyuan Fan, Carles Ayats, Miquel A. Pericas
Summary: This study involved the controlled synthesis of calcium carbonate particles surface-functionalized with azido groups, followed by copper-catalyzed alkyne-azide cycloaddition reactions to prepare novel catalytic materials. The immobilized catalyst demonstrated high selectivity and efficiency in catalyzing Michael addition reactions of aldehydes, with the added advantage of being reusable and adaptable to continuous-flow operation for increased productivity.
JOURNAL OF CATALYSIS
(2021)
Article
Chemistry, Multidisciplinary
Zsuzsanna Feher, Johanna Kiss, Peter Kisszekelyi, Janos Molnar, Peter Huszthy, Levente Karpati, Jozsef Kupai
Summary: Chemical depolymerisation is a sustainable plastic recycling method that can achieve a circular economy by recovering pure monomers. In this study, commercially available organocatalyst-modified silica gels and functionalized silica gel were tested for the glycolysis of PET. The reaction was optimized and the recyclability of the catalysts was evaluated. The results showed that the modified silica gels had higher catalytic activities and achieved a high yield of monomers, making them a promising solution for PET waste management.
Article
Biochemistry & Molecular Biology
Jingliang Huang, Yangjia Liu, Chuang Liu, Liping Xie, Rongqing Zhang
Summary: In pearl oysters, the prismatic layer consists of polygonal prisms enveloped by organic matrices that are heterogeneously distributed, with highly acidic fractions inside the prisms columns and basic fractions as inter-column framework. The organic matrices are enriched in specific amino acids, influencing the matrix's properties. Proteomics data reveals a role of electric charge and hydrophobic effect in matrix heterogeneity.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Article
Chemistry, Applied
Mahsa Khorasani, Hossein Naeimi, Zohreh Zahraei
Summary: A mobile Ca/Mg core was formed inside the silica shell of mesoporous yolk-shell nanocomposites, which exhibited high reactivity and recyclability in multicomponent reactions.
APPLIED ORGANOMETALLIC CHEMISTRY
(2023)
Article
Engineering, Chemical
Jianguang Liang, Jingjian Zha, Nana Zhao, Zhengyu Tang, Yucai He, Cuiluan Ma
Summary: This study successfully utilized ultrasonic-treated chestnut shell waste as a biobased support catalyst to convert waste lignocellulosic materials into furfural, achieving high yield and recyclable properties.
Article
Environmental Sciences
Jin Wang, Jihui Zhang, Yahui Song, Xianmang Xu, Mengyun Cai, Peichuang Li, Wenpeng Yuan, Yujiao Xiahou
Summary: In this research, a highly recyclable catalyst of Ag-based agarose hydrogel was successfully fabricated through a simple reduction method. The hydroxyl functional groups in agarose effectively control the growth and dispersion of Ag nanoparticles in the hydrogel, ensuring the reusability of the catalyst. The hydrogel showed great potential as a catalyst for reducing aromatic organic pollutants, achieving high conversion rates and efficient reduction of various pollutants.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Engineering, Environmental
Z. T. Laldinpuii, Vanlalngaihawma Khiangte, Samson Lalhmangaihzuala, Chhakchhuak Lalmuanpuia, Zodinpuia Pachuau, C. Lalhriatpuia, Khiangte Vanlaldinpuia
Summary: The decomposition of used PET bottles using bamboo leaf ash as a catalyst resulted in high yields of DMT and EG. The catalyst showed excellent thermal stability, bio-compatibility, and recyclability, making it an attractive and greener alternative for PET depolymerization.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2022)
Article
Green & Sustainable Science & Technology
Rauf Foroutan, Reza Mohammadi, Jafar Razeghi, Bahman Ramavandi
Summary: A new heterogeneous biochar/CaO/K2CO3 catalyst was developed for biodiesel production from waste edible oil. The catalyst showed high efficiency (98.83%) at optimal conditions and was found to be exothermic. Additionally, the catalyst demonstrated a high reusability rate of up to 90% in up to 5 steps.
Article
Chemistry, Multidisciplinary
Xuemei Liu, Chaonan Cui, Shuoshuo Wei, Jinyu Han, Xinli Zhu, Qingfeng Ge, Hua Wang
Summary: This study presents a new strategy for designing efficient photocatalysts that can convert CO2 into hydrocarbons by utilizing synergistic catalytic sites. The findings provide a solution for the selective photocatalytic reduction of CO2 to CH4.
Article
Chemistry, Multidisciplinary
Chengxian Hu, Dan Wang, Lu Wang, Ying Fu, Zhengyin Du
Summary: A novel one-pot, three-component reaction conducted under electrochemical conditions was studied. The reaction involved 2-aminothiophenols, aldehydes, and malononitrile, using TBABF4 as an electrolyte and CuI as a catalyst. The proposed reaction mechanism suggested that CuI served as an electron relay. This method offers simplified operation, high atom economy, and mild reaction conditions.
Article
Chemistry, Multidisciplinary
Zhi Yang, Yu Chen, Linxi Wan, Yuxiao Li, Dan Chen, Jianlin Tao, Pei Tang, Fen-Er Chen
Summary: A highly enantioselective method for the complete hydrogenation of pyrimidinium salts using Ir/(S,S)-f-Binaphane complex as the catalyst was developed. This method provides easy access to fully saturated chiral hexahydropyrimidines, which are prevalent in many bioactive molecules. The reactions exhibit high yields and enantioselectivities under mild reaction conditions without additives. Successful application of this methodology in a continuous flow fashion further extends its practical utility.
Article
Chemistry, Multidisciplinary
Tina Jeoh, Jennifer Danger Nill, Wujun Zhao, Sankar Raju Narayanasamy, Liang Chen, Hoi-Ying N. Holman
Summary: In this study, the enzymatic hydrolysis of cellulose was investigated using real-time infrared spectromicroscopy. The spatial heterogeneity of cellulose was found to impact the hydrolysis kinetics. Hydration affected cellulose ordering, and Cel7A preferentially removed less extensively hydrogen bonded cellulose.
Article
Chemistry, Multidisciplinary
Tiphaine Richard, Walid Abdallah, Xavier Trivelli, Mathieu Sauthier, Clement Dumont
Summary: An effective method of grafting functionalities onto lignin based on glycerol carbonate has been developed using an efficient nickel-catalysed telomerisation reaction. This method allows lignin to have new reactive functions and reduces the glass transition temperatures of modified lignins, thereby expanding the application range of lignin-based resins.
Article
Chemistry, Multidisciplinary
Jing Qi, Xiyan Wang, Gan Wang, Srinivas Reddy Dubbaka, Patrick ONeill, Hwee Ting Ang, Jie Wu
Summary: This study presents a green and environmentally friendly approach for the synthesis of imides using electrocatalytic oxidation with H2O as the oxygen source. The method eliminates the need for toxic or expensive oxidants and achieves high yields under mild reaction conditions. It shows broad substrate compatibility and potential for industrial applications.
Article
Chemistry, Multidisciplinary
Babasaheb Sopan Gore, Lin-Wei Pan, Jun-Hao Lin, Yi-Chi Luo, Jeh-Jeng Wang
Summary: Here, we report a visible light-promoted intramolecular radical cascade reaction for the construction of fluorenol and naphthalene-fused cyclopropyl carbaldehyde derivatives. This method offers mild reaction conditions, a broad substrate scope, excellent step efficiency, and scalability, without the need for external chemical oxidants. The novelty of this protocol was demonstrated by synthesizing chrysene analogs and performing late-stage functionalizations.
Article
Chemistry, Multidisciplinary
Juho Antti Sirvio, Idamaria Romakkaniemi, Juha Ahola, Svitlana Filonenko, Juha P. Heiskanen, Ari Ammala
Summary: This article discusses the method of using supramolecular interaction between an aromatic hydrogen bond donor and lignin to achieve rapid delignification of softwood at low temperatures.
Article
Chemistry, Multidisciplinary
Yunyan Meng, Chunxiang Pan, Na Liu, Hongjiang Li, Zixiu Liu, Yao Deng, Zixiang Wei, Jianbin Xu, Baomin Fan
Summary: A novel visible light-driven synthesis method for 2,3-diamines has been developed, which has mild conditions, avoids the use of metal reagents, and can synthesize diamines and diols in one pot.
Article
Chemistry, Multidisciplinary
Mingqing Huang, Haiyang Huang, Mengyao You, Xinxin Zhang, Longgen Sun, Chao Chen, Zhichao Mei, Ruchun Yang, Qiang Xiao
Summary: A direct air-oxidized strategy for the synthesis of benzo[b]phosphole oxides was developed in this study. Arylphosphine oxides were transformed into phosphinoyl radicals, which were further combined with various alkynes to achieve the desired products. DFT calculations revealed the mechanism of phosphinoyl radical formation.
Article
Chemistry, Multidisciplinary
Anwei Wang, Jiayin Huang, Chunsheng Zhao, Yu Fan, Junfeng Qian, Qun Chen, Mingyang He, Weiyou Zhou
Summary: This study demonstrates an innovative strategy for the aerobic oxidation of C(sp(3))-H bonds using gamma-valerolactone. By optimizing the reaction conditions and utilizing specific catalysts, efficient oxidation of C(sp(3))-H bonds is achieved with good chemoselectivity in certain cases.
Article
Chemistry, Multidisciplinary
Shun Li, Likai Tong, Zhijian Peng, Bo Zhang, Xiuli Fu
Summary: Sulfide compounds show promise as electrocatalysts for water splitting, but their performance is limited by factors such as limited active sites and hindered substance transport. This study successfully prepared a high-entropy sulfide (ZnCoMnFeAlMg)(9)S-8, which reduced grain size and increased specific surface area, enabling the realization of a dual-functional catalyst with multiple catalytic sites. High entropy also modulated the electronic properties of sulfides, reducing the potential energy barrier for hydrolysis. This research introduces a new approach for functionalizing high entropy nanomaterials and improves the performance of water splitting catalysts.