Article
Chemistry, Multidisciplinary
Jiaqi Yan, Kuiyi You, Wenjin Ni, Ting Duan, Zhenpan Chen, Fangfang Zhao, He'an Luo
Summary: In this study, a mild and efficient method for highly selective preparation of 1,5-dinitronaphthalene was developed through the catalytic nitration reaction. The synergetic catalysis of Fe1.5Mn0.5-SZ and O-2-Ac2O significantly improved the conversion of 1-nitronaphthalene and the selectivity of 1,5-dinitronaphthalene.
REACTION CHEMISTRY & ENGINEERING
(2021)
Article
Chemistry, Physical
Jiaqi Yan, Kuiyi You, Jiahong Yin, Wenjin Ni, Fangfang Zhao, Qiuhong Ai, He'an Luo
Summary: An efficient approach utilizing a mesoporous submicron sub-SO42-/Fe1.5Cu0.5-ZrO2 (s-SFCZ) superacid catalyst prepared by the two-step hydrothermal impregnation (THI) method is developed for the highly selective preparation of 1,5-dinitronaphthalene. The results demonstrate that the enhanced selectivity is attributed to the synergistic catalysis of s-SFCZ combined O2-Ac2O. Under optimal conditions, a conversion rate of 94.8% for 1-nitronaphthalene and a selectivity of 62.1% for 1,5-dinitronaphthalene are achieved. This work provides a novel strategy for preparing mesoporous submicron catalysts and holds potential application prospects.
SURFACES AND INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Jiaqi Yan, Xiaowen Zhang, Jiahong Yin, Fangfang Zhao, Kuiyi You, He'an Luo
Summary: A mild, efficient, and green approach for the selective synthesis of 1,5-dinitronaphthalene (1,5-DNN) was developed using a solid superacid S2O82-/Fe-ZrO2 catalyst combined with NO2 and O-2-Ac2O. The optimized reaction conditions led to a conversion rate of 96.8% for 1-NN and a selectivity of 62.6% for 1,5-DNN. The excellent catalytic activity of S2O82-/Fe-ZrO2 can be attributed to its Lewis acid sites and strong acidity. This work provides a practical strategy for the cost-effective, environmentally friendly, and efficient synthesis of 1,5-DNN with significant industrial application prospects.
RESEARCH ON CHEMICAL INTERMEDIATES
(2023)
Article
Chemistry, Organic
Isuru M. Jayalath, Madelyn M. Gerken, Georgia Mantel, C. Scott Hartley
Summary: The study investigates the impact of carbodiimide-induced geometry changes in a chemically fueled system, inspired by nucleotide-induced conformational changes in motor proteins. The results show that the efficiency, maximum concentration, and lifetime of the system are significantly influenced by steric hindrance and electronic effects of the substituents.
JOURNAL OF ORGANIC CHEMISTRY
(2021)
Article
Chemistry, Physical
Jithin Gopakumar, Sunniva Vold, Bjorn Christian Enger, David Waller, Per Erik Vullum, Magnus Ronning
Summary: The Ostwald process is the most common industrial process for producing nitric acid. This research focuses on catalytic oxidation of NO to NO2 using silver-promoted manganese on zirconia catalysts under industrially relevant conditions. The results show that the manganese catalysts can work effectively at low temperatures and concentrations relevant to industrial catalytic oxidation of NO.
CATALYSIS SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Physical
Xu-Fang Wang, Lin-Ya Xu, Cai-Hao Wen, Dan -Dan Li, Bei Li, Ji-Qing Lu, Qi-Hua Yang, Meng- Fei Luo, Jian Chen
Summary: In this study, it was discovered that enhancing strong metal-support interaction effectively weakens the competitive adsorption of H2O on Pt active sites in Pt-based catalysts. The formation of aggregated WO3 species in Pt-3W/SO42--ZrO2 leads to enhanced SMSI, which plays a critical role in weakening water vapor adsorption on active sites. As a result, Pt-3W/SO42--ZrO2 exhibits the highest activity (T90 = 200 degrees C) and water tolerance among Pt/ZrO2, Pt/WO3, Pt-3W/ZrO2, and Pt/SO42--ZrO2 under wet conditions (5% H2O). Our preliminary findings provide a promising strategy for designing superior platinum catalysts for VOCs complete oxidation.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Energy & Fuels
Xiaodi Li, Shan Ren, Lian Liu, Xiangdong Xing, Lin Chen, Jiangling Li, Jian Yang, Qingcai Liu
Summary: The deactivation of denitration catalysts by heavy metals is still a challenge in the practical application of selective catalytic reduction of NOx with NH3. In this study, a novel anti-poisoning strategy was proposed by designing a CeO2/ZrO2 catalyst supported by SO42-/ZrO2 superacid. The introduction of SO42-/ZrO2 significantly enhanced the catalytic performance, leading to high NOx removal efficiency throughout a wide temperature range.
Article
Biochemistry & Molecular Biology
Lorenzo E. Fornasari, Bruna J. da S. Bronsato, Lucia G. Appel, Roberto R. de Avillez
Summary: Recent research investigates the enhancement of catalytic activity and selectivity in the physical mixture In2O3-ZrO2. The study aims to examine the relationship between oxygen diffusion, defect formation, and epitaxial tension in the mixture using molecular dynamics. Simulations of different configurations of the crystals and their mixture reveal significant oxygen defect formation in both. The mixture stabilizes In2O3 while destabilizing ZrO2, explaining the high activity and selectivity in the production of isobutylene from ethanol.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Engineering, Chemical
Sitan Wang, Xuan Meng, Naiwang Liu, Li Shi
Summary: A novel Al2O3@SO42-/ZrO2 catalyst with high aluminum content was successfully synthesized by coating sulfated zirconia on the surface of gamma-Al2O3. The unique structure not only stabilized the tetragonal zirconia phase but also promoted Bronsted acid sites, exhibiting outstanding catalytic activity and stability.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Physical
Ikram Ullah, T. A. Taha, Asma M. Alenad, Ikram Uddin, Asif Hayat, Ashiq Hayat, Muhammad Sohail, Ahmad Irfan, Javid Khan, Arkom Palamanit
Summary: Sulfated zirconia catalysts promoted by platinum and platinum alumina were synthesized by hydro-thermal route, showing excellent catalytic efficiency in the isomerization of n-butane. The Pt/Al2O3 (PA) modified SZ exhibited better catalytic performance and higher stability than SZ and Pt-modified SZ.
SURFACES AND INTERFACES
(2021)
Article
Engineering, Environmental
Wei Hong, Yan Liu, Tianle Zhu, Haining Wang, Ye Sun, Fangxia Shen, Xiang Li
Summary: In this study, an innovative α-MnO2/ZSM-5 catalyst modified with SO42- was successfully prepared, which showed enhanced adsorption ability and improved surface acidity. This catalyst exhibited excellent toluene conversion and COx selectivity, demonstrating promising potential for catalytic ozonation of toluene.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Engineering, Environmental
Wei Hong, Yan Liu, Xinxin Jiang, Chenguang An, Tianle Zhu, Ye Sun, Haining Wang, Fangxia Shen, Xiang Li
Summary: Appropriate introduction of alkali metal can improve the formation ability of hydroxyl radicals (center dot OH) during catalytic ozonation process, leading to enhanced toluene degradation. The introduction of 5.9wt% K+ resulted in the formation of the highest amount of center dot OH and exhibited excellent catalytic activity and selectivity. The deactivated catalyst can be regenerated through water washing and heat treatment.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Xiaohong Zheng, Xin Hong, Xinfeng Qiao, Yina Yang, Siqi Jiao
Summary: Two anodic oxidation processes were used to prepare ordered mesoporous zirconia nanotubes in this study. Ammonium metatungstate was introduced into zirconia to obtain mesoporous ZrO2-WO3 composite nanotubes. XRD, TEM, and SEM tests were performed on the material. Furthermore, a mixed electromotive force-based NO2 sensor was fabricated using ZrO2-WO3 nanotubes as sensing materials. The sensor showed low working temperature, high sensitivity, remarkable selectivity, stability, and repeatability due to the tubular structure of the composite and improved catalytic efficiency.
MATERIALS RESEARCH BULLETIN
(2023)
Article
Nanoscience & Nanotechnology
Yuhua Yan, Zongtao Ma, Jingyao Sun, Miaomiao Bu, Yanming Huo, Ziying Wang, Yunfei Li, Ning Hu
Summary: This study designed three room-temperature ZrO2-based sensors and compared their NO2 sensing properties, finding that the rod-shaped ZrO2 sensor exhibited higher sensitivity and response speed.
NANO MATERIALS SCIENCE
(2021)
Article
Energy & Fuels
Chenxi Zhao, Wenjun Zhu, Changhai Liang
Summary: This study investigates the influence of different crystalline ZrO2 supports on the catalytic performance of NiMo/ZrO2 catalyst for hydrodeoxygenation. Monoclinic ZrO2 is found to exhibit better catalytic activity and selectivity. NiMo/m-ZrO2 shows higher hydrogenation conversion and liquid alkanes selectivity, as well as excellent catalytic stability.
Article
Engineering, Environmental
Hailu Liu, Linqiao Wang, Heng Liu, Min Guan, Chun-Jen Su, U-Ser Jeng, Bin Zhao, Chao Weng, Kuiyi You, Xinhui Lu
Summary: The study demonstrates that ternary polymerization is an efficient strategy to obtain high-performance all-polymer solar cells with green-solvent processing.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Organic
Shanping Chen, Yi Xia, Shikai Jin, Hanwen Lei, Kuiyi You, Guo-Jun Deng
Summary: A mild two-step synthetic approach has been developed for the preparation of structurally valuable indolo[3',2':4,5]pyrrolo[3,2,1-kl]phenothiazines. Cyclohexanone was used as the key bridge to connect the indole and phenothiazine frameworks, leading to the construction of a structurally valuable indole-fused derivative. This protocol achieved the cascade construction of multiple C-hetero bonds, providing a convenient approach for accessing a hexacyclic-fused system containing both indole and phenothiazine, two privileged skeletons.
JOURNAL OF ORGANIC CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Gui Chen, Kuiyi You, Xiangbo Gong, Fangfang Zhao, Zhenpan Chen, He'an Luo
Summary: A highly selective method for preparing benzyl alcohol and benzaldehyde from toluene oxidation using CeO2-MnOx composite oxides in a solvent-free system was successfully developed. The composite oxides exhibited high selectivity and stability, offering a new insight into selective aromatic alcohol and aldehyde production.
REACTION CHEMISTRY & ENGINEERING
(2022)
Article
Chemistry, Physical
Hui Yin, Feng Su, Chao Luo, Lixia Zhu, Wenzhou Zhong, Liqiu Mao, Kuiyi You, Dulin Yin
Summary: In the selective oxidation of cyclohexane, a new concept of using CuCl2/TS-1 hollow structure was developed to achieve complete selectivity in the formation of the final oxidation product KA-oil. Experimental studies combined with theoretical calculations show that the major tetrahedral Ti-O4 sites in heterojunctions play a crucial role in isolating energy levels near the conduction and valence bands.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Engineering, Chemical
Jian Jian, Dexing Yang, Peng Liu, Kuiyi You, Weijie Sun, Hu Zhou, Zhengqiu Yuan, Qiuhong Ai, Hean Luo
Summary: A highly efficient and stable hydrotalcite-derived Cu-MgAlO catalyst was developed for the partial oxidation of cyclohexane. The catalyst showed excellent catalytic activity in promoting the decomposition of cyclohexyl hydroperoxide into a mixture of cyclohexanol and cyclohexanone.
CHINESE JOURNAL OF CHEMICAL ENGINEERING
(2022)
Article
Chemistry, Inorganic & Nuclear
Zhenpan Chen, Pengpeng Cai, Jie Cai, Shuoqi Hao, Yujie Chen, Wenguang Yu, Feifei Xu, Kuiyi You, He'an Luo
Summary: This study used short-range structure tailored active carbon and cobalt catalyst to improve the conversion rate of calcium oxide in the solid-phase synthesis of calcium carbide. Changing the short-range structure of carbon material played a crucial role in enhancing the reactivity, and adding the cobalt catalyst further increased the conversion rate.
JOURNAL OF SOLID STATE CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Gui Chen, Kuiyi You, Fangfang Zhao, Zhenpan Chen, Hean Luo
Summary: An inexpensive and controllable CeMnOx composite oxides catalyst was prepared for the liquid-phase catalytic oxidation of toluene using ultrasound-assisted co-precipitation method. The CeMnOx composite oxides catalyst showed good catalytic performance and provided a simple, benign, and controllable approach for the selective oxidation of toluene to valuable oxidation products.
RESEARCH ON CHEMICAL INTERMEDIATES
(2022)
Article
Chemistry, Applied
Cheng Zhong, Zhichao Shang, Caixian Zhao, He'an Luo, Yi Cao, Dejian Yan, Kuiyi You
Summary: In this paper, a ZnO/Ti3C2TX composite photoanode was fabricated for enhanced photoelectrochemical water splitting. The results showed that the addition of Ti3C2TX co-catalyst increased the photocurrent density by 1.4 times and achieved a photoconversion efficiency of 0.32%.
TOPICS IN CATALYSIS
(2023)
Article
Engineering, Chemical
Shangjun Fu, Kuiyi You, Zhenpan Chen, Taobo Liu, Qiong Wang, Fangfang Zhao, Qiuhong Ai, Pingle Liu, He'an Luo
Summary: A Co3O4-CeO2 composite oxide catalyst was successfully prepared and showed higher selectivity in the selective oxidation of cyclohexane. The synergistic effects between the Co3+/Co2+ and Ce4+/Ce3+ redox pairs in the catalyst improved the efficiency and stability of the reaction. This study provides a feasible strategy for designing high-performance catalysts for the selective oxidation of alkanes.
FRONTIERS OF CHEMICAL SCIENCE AND ENGINEERING
(2022)
Article
Chemistry, Physical
Zhenpan Chen, Qingqing Jiang, Hongyu An, Juan Zhang, Shuoqi Hao, Xinju Li, Lili Cai, Wenguang Yu, Kuiyi You, Xuefeng Zhu, Can Li
Summary: Ceria substituted with zirconium (Ce1-xZrxO2) is a promising material with great oxygen storage capacity and potential fuel production in thermochemical CO2/H2O splitting cycles. However, the fuel release rate of Ce1-xZrxO2 solid solution is relatively slow. In this study, noble metal catalysts (RuOx, PtOx, and IrOx) are used to enhance the CO release rate of Ce-0.85Zr0.15O2-based two-step thermochemical CO2 splitting, resulting in increased solar-to-fuel energy conversion efficiency.
Article
Chemistry, Multidisciplinary
Agata Blasiak, Anh T. L. Truong, Peter Wang, Lissa Hooi, De Hoe Chye, Shi-Bei Tan, Kui You, Alexandria Remus, David Michael Allen, Louis Yi Ann Chai, Conrad E. Z. Chan, David C. B. Lye, Gek-Yen G. Tan, Shirley G. K. Seah, Edward Kai-Hua Chow, Dean Ho
Summary: The study used the IDentif.AI platform to investigate the drug-drug and drug-dose interactions of six potential therapies for COVID-19. The results showed that while few drugs demonstrated moderate efficacy as monotherapies, combinatorial drug testing revealed significant dose-dependent drug-drug interactions. These findings may support further exploration of dose-dependent drug interactions between different drug classes as possible combinatorial therapies in clinical trials.
Article
Engineering, Chemical
Zhan Tan, Shangshang Zhang, Xinwei Yue, Fangfan Zhao, Fengcao Xi, Dejian Yan, Hao Ling, Rui Zhang, Feiying Tang, Kuiyi You, He'an Luo, Xiaowen Zhang
Summary: This study utilized low-cost and environmentally friendly clay catalysts to accelerate CO2 desorption in amine-based CO2 capture technology, leading to improved efficiency. Among the catalysts, attapulgite demonstrated better catalytic activity and stability. This research contributes to the development of low-energy consuming CO2 capture technology.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Yanan Wei, Wenjin Ni, Chun Zhang, Kuiyi You, Fangfang Zhao, Zhenpan Chen, Qiuhong Ai, He'an Luo
Summary: In this research, a simple and efficient method for the high-yield preparation of cyclohexylamine from the vapor-phase catalytic amination of cyclohexanol was developed. The NiCu/MgAlO alloy catalyst showed excellent catalytic performance and stability. This study demonstrates the potential of this highly dispersed and stable Ni-Cu alloy catalyst for efficient amination of alcohols in the vapor phase.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Article
Engineering, Environmental
Zhan Tan, Shangshang Zhang, Fangfang Zhao, Rui Zhang, Feiying Tang, Kuiyi You, He'an Luo, Xiaowen Zhang
Summary: This study demonstrates the use of a SnO2/ATP solid acid catalyst to enhance CO2 desorption in amine solutions. The catalyst showed superior performance in terms of CO2 desorption rate and amount, and effectively reduced the relative heat duty. These findings highlight the significant potential of the catalyst for low-energy and environmentally friendly CO2 capture processes.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Organic
Shanping Chen, Yi Xia, Wei Feng, Kuiyi You, Guojiang Mao, Guo-Jun Deng
Summary: A novel Cu-catalyzed synthesis of structurally valuable spiroimidazole derivatives from 2-(indol-3-yl) cyclohexanones and amidines via an indolyl mediated cyclization-rearrangement reaction is described. The present approach features advantages including easily available starting materials, mild reaction conditions, gram-scale synthesis and high atom economy, providing convenient access to spiroimidazole derivatives.
ORGANIC CHEMISTRY FRONTIERS
(2022)
