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Xiao H, Zhang C, Zhao J, Zheng Z, Li Y. Selective hydrogenation of dimethyl terephthalate over a potassium-modified Ni/SiO 2 catalyst. RSC Adv 2023; 13:16363-16368. [PMID: 37266504 PMCID: PMC10230349 DOI: 10.1039/d3ra02223d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Accepted: 05/22/2023] [Indexed: 06/03/2023] Open
Abstract
Selective hydrogenation of dimethyl terephthalate (DMT) is an ideal way to prepare 1,4-cyclohexane dicarboxylate (DMCD), an important intermediate and monomer. Even though noble metal-based catalysts (e.g., Ru, Pd) have been developed for selective hydrogenation of DMT, the use of non-precious Ni catalysts to achieve high activity and selectivity is still challenging. In this study, we present that only 0.5 wt% of KF by post-impregnated doping can significantly improve the performance of Ni/SiO2 catalysts (83% vs. 96% selectivity; 41% vs. 95% conversion). The selectivity of DMCD can be up to 97%, which is the highest reported over Ni catalysts. The boosting effect of KF modification might be due to higher amounts of Ni(0) species and lower amounts of moderate acidic sites, which are beneficial for selective hydrogenation of phenyl rings over hydrogenolysis of ester groups.
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Affiliation(s)
- Han Xiao
- School of Chemical Engineering, Guizhou Minzu University Guiyang 550025 P. R. China
| | - Chao Zhang
- School of Chemical Engineering, Guizhou Minzu University Guiyang 550025 P. R. China
| | - Jiaojiao Zhao
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics (LICP), Chinese Academy of Sciences Lanzhou 730000 P. R. China
| | - Zhaohui Zheng
- College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology Qingdao 266000 P. R. China
| | - Yuehui Li
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics (LICP), Chinese Academy of Sciences Lanzhou 730000 P. R. China
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Zhang L, Han S, Ding L, He X, Zhang M. Flexible and functional SiO2 nanofibers immobilized with nickel nanoparticles for nanocatalysis and protein adsorption. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.129380] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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3
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Core-Shell Structured Magnetic Carboxymethyl Cellulose-Based Hydrogel Nanosorbents for Effective Adsorption of Methylene Blue from Aqueous Solution. Polymers (Basel) 2021; 13:polym13183054. [PMID: 34577955 PMCID: PMC8466880 DOI: 10.3390/polym13183054] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2021] [Revised: 08/27/2021] [Accepted: 08/28/2021] [Indexed: 11/17/2022] Open
Abstract
This article reports effective removal of methylene blue (MB) dyes from aqueous solutions using a novel magnetic polymer nanocomposite. The core-shell structured nanosorbents was fabricated via coating Fe3O4 nanoparticles with a layer of hydrogel material, that synthesized by carboxymethyl cellulose cross-linked with poly(acrylic acid-co-acrylamide). Some physico-chemical properties of the nanosorbents were characterized by various testing methods. The nanosorbent could be easily separated from aqueous solutions by an external magnetic field and the mass fraction of outer hydrogel shell was 20.3 wt%. The adsorption performance was investigated as the effects of solution pH, adsorbent content, initial dye concentration, and contact time. The maximum adsorption capacity was obtained at neutral pH of 7 with a sorbent dose of 1.5 g L−1. The experimental data of MB adsorption were fit to Langmuir isotherm model and Pseudo-second-order kinetic model with maximum adsorption of 34.3 mg g−1. XPS technique was applied to study the mechanism of adsorption, electrostatic attraction and physically adsorption may control the adsorption behavior of the composite nanosorbents. In addition, a good reusability of 83.5% MB recovering with adsorption capacity decreasing by 16.5% over five cycles of sorption/desorption was observed.
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Choi W, Jo H, Choi JW, Suh DJ, Lee H, Kim C, Kim KH, Lee KY, Ha JM. Stabilization of acid-rich bio-oil by catalytic mild hydrotreating. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 272:116180. [PMID: 33445152 DOI: 10.1016/j.envpol.2020.116180] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Revised: 11/13/2020] [Accepted: 11/26/2020] [Indexed: 06/12/2023]
Abstract
Although liquid products derived from the pyrolysis of biomass are promising for the production of petroleum-like hydrocarbon fuels, the catalytic burden of hydrodeoxygenation must be reduced to achieve feasible upgrading processes. Herein, mild hydrotreating of an acid-rich biomass pyrolysis oil (bio-oil) with an unusually high total acid number (588 mg KOH/g bio-oil) was performed to stabilize the low-quality bio-oil. Ru-added TiO2-supported transition metal catalysts stabilized the bio-oil by reducing its acidity more compared to what could be achieved by Ru-free catalysts; this process also leads to lower loss of organic compounds compared to when using a Ru/TiO2 catalyst. Based on the performance of transition metal catalysts, including Ni, Co, and Cu, supported on TiO2, tungstate-zirconia, or SiO2, supported bimetallic catalysts were prepared by adding Ru to the TiO2-supported metal catalysts. The bimetallic catalysts Ru/Ni/TiO2 and Ru/Co/TiO2 exhibited good decarboxylation activity for the removal of carboxylic acids and a higher yield of organic compounds compared to that provided by Ru, which can be deemed appropriate for feedstocks when hydrodeoxygenation needs to suppress the loss of organic reactants. Using these catalysts, the carboxylic acid concentration was reduced to 319-323 mg KOH/g bio-oil with organic yields of 62-63 wt% at reaction temperatures 150-170 °C lower than the temperature required for direct conversion of carboxylic acids to alcohols or deoxygenates. The improved catalytic hydrotreating activity of Ru-added transition metals can be attributed to the high acid site densities of these catalysts along with their improved hydrogenation activities.
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Affiliation(s)
- Wonjun Choi
- Clean Energy Research Center, Korea Institute of Science and Technology, Seoul, 02792, Republic of Korea; Department of Chemical and Biological Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Hyeonmin Jo
- Clean Energy Research Center, Korea Institute of Science and Technology, Seoul, 02792, Republic of Korea; Department of Chemical and Biological Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Jae-Wook Choi
- Clean Energy Research Center, Korea Institute of Science and Technology, Seoul, 02792, Republic of Korea
| | - Dong Jin Suh
- Clean Energy Research Center, Korea Institute of Science and Technology, Seoul, 02792, Republic of Korea
| | - Hyunjoo Lee
- Clean Energy Research Center, Korea Institute of Science and Technology, Seoul, 02792, Republic of Korea; Division of Energy & Environment Technology, KIST School, Korea University of Science and Technology, Seoul, 02792, Republic of Korea
| | - Changsoo Kim
- Clean Energy Research Center, Korea Institute of Science and Technology, Seoul, 02792, Republic of Korea
| | - Kwang Ho Kim
- Clean Energy Research Center, Korea Institute of Science and Technology, Seoul, 02792, Republic of Korea; Department of Wood Science, University of British Columbia, Vancouver, BC, V6T1Z4, Canada
| | - Kwan-Young Lee
- Department of Chemical and Biological Engineering, Korea University, Seoul, 02841, Republic of Korea; Graduate School of Energy and Environment (Green School), Korea University, Seoul, 02841, Republic of Korea
| | - Jeong-Myeong Ha
- Clean Energy Research Center, Korea Institute of Science and Technology, Seoul, 02792, Republic of Korea; Division of Energy & Environment Technology, KIST School, Korea University of Science and Technology, Seoul, 02792, Republic of Korea.
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5
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Jiang A, Liu Y, Ma L, Mao F, Liu L, Zhai X, Zhou J. Biocompatible Heat-Shock Protein Inhibitor-Delivered Flowerlike Short-Wave Infrared Nanoprobe for Mild Temperature-Driven Highly Efficient Tumor Ablation. ACS APPLIED MATERIALS & INTERFACES 2019; 11:6820-6828. [PMID: 30677285 DOI: 10.1021/acsami.8b21483] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Multifunctional nanomaterials for dual-mode imaging guided cancer therapy are highly desirable in clinical applications. Herein, a flowerlike NiS2-coated NaLuF4:Nd (Lu:Nd@NiS2) nanoparticle was synthesized as a novel therapeutic agent for short-wave infrared light imaging and magnetic resonance imaging to guide photothermal therapy (PTT). The material was then loaded with phenolic epigallocatechin 3-gallate (EGCG), which is a natural heat-shock protein 90 (HSP90) inhibitor. Upon near infrared irradiation, EGCG was released from the Lu:Nd@NiS2-EGCG, which bound HSP90 and reduced cell tolerance to heat, resulting in a better therapeutic effect at the same elevated temperature. Therefore, with minimal side effects and remarkable antitumor efficacy in vivo, Lu:Nd@NiS2-EGCG appeared to be a promising photothermal agent for enhanced PTT.
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MESH Headings
- Animals
- Catechin/analogs & derivatives
- Catechin/chemistry
- Catechin/pharmacokinetics
- Catechin/pharmacology
- Cell Line, Tumor
- Coated Materials, Biocompatible/chemistry
- Coated Materials, Biocompatible/pharmacokinetics
- Coated Materials, Biocompatible/pharmacology
- HSP90 Heat-Shock Proteins/antagonists & inhibitors
- Humans
- Hyperthermia, Induced/methods
- Infrared Rays
- Magnetic Resonance Imaging
- Mice
- Mice, Nude
- Nanostructures/chemistry
- Nanostructures/therapeutic use
- Neoplasm Proteins/antagonists & inhibitors
- Neoplasms, Experimental/diagnostic imaging
- Neoplasms, Experimental/metabolism
- Neoplasms, Experimental/pathology
- Neoplasms, Experimental/therapy
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Affiliation(s)
- Anqi Jiang
- Department of Chemistry , Capital Normal University , Beijing 100048 , P. R. China
| | - Yuxin Liu
- Department of Chemistry , Capital Normal University , Beijing 100048 , P. R. China
| | - Liyi Ma
- Department of Chemistry , Capital Normal University , Beijing 100048 , P. R. China
| | - Fang Mao
- Department of Chemistry , Capital Normal University , Beijing 100048 , P. R. China
| | - Lidong Liu
- Department of Chemistry , Capital Normal University , Beijing 100048 , P. R. China
| | - Xuejiao Zhai
- Department of Chemistry , Capital Normal University , Beijing 100048 , P. R. China
| | - Jing Zhou
- Department of Chemistry , Capital Normal University , Beijing 100048 , P. R. China
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6
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Wang R, Ge C, Xing T, Zhang Y, Zhang Y, Zhang X. Facile synthesis of magnetic hybrid metal–organic frameworks with high adsorption capacity for methylene blue. Appl Organomet Chem 2017. [DOI: 10.1002/aoc.3798] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Rui Wang
- College of ChemistryLiaoning University Shenyang 110036 People's Republic of China
| | - Chunhua Ge
- College of ChemistryLiaoning University Shenyang 110036 People's Republic of China
| | - Tianzhu Xing
- College of ChemistryLiaoning University Shenyang 110036 People's Republic of China
| | - Yuanyuan Zhang
- College of ChemistryLiaoning University Shenyang 110036 People's Republic of China
| | - Yundi Zhang
- College of ChemistryLiaoning University Shenyang 110036 People's Republic of China
| | - Xiangdong Zhang
- College of ChemistryLiaoning University Shenyang 110036 People's Republic of China
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7
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Yin W, Hao S, Cao H. Solvothermal synthesis of magnetic CoFe2O4/rGO nanocomposites for highly efficient dye removal in wastewater. RSC Adv 2017. [DOI: 10.1039/c6ra26948f] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Magnetic CoFe2O4/rGO nanocomposites were fabricated via a solvothermal process and used as environmentally-friendly adsorbents for the adsorption of organic dyes.
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Affiliation(s)
- Wenzhu Yin
- Department of Chemistry
- Tsinghua University
- Beijing 100084
- P. R. China
| | - Shuo Hao
- Department of Chemistry
- Tsinghua University
- Beijing 100084
- P. R. China
- College of Chemistry and Molecular Engineering
| | - Huaqiang Cao
- Department of Chemistry
- Tsinghua University
- Beijing 100084
- P. R. China
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8
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Yin W, Cao H. One-step synthesis of SnO2-reduced graphene oxide (SOG) composites for efficient removal of organic dyes from wastewater. RSC Adv 2016. [DOI: 10.1039/c6ra21856c] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
In this work, SnO2 functionalized graphene oxide was shown to possess high adsorption capacities and fast adsorption rates for organic dyes over wide pH ranges. Additionally, the adsorbent could be easily regenerated by washing with ethanol.
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Affiliation(s)
- Wenzhu Yin
- Department of Chemistry
- Tsinghua University
- Beijing 100084
- P. R. China
| | - Huaqiang Cao
- Department of Chemistry
- Tsinghua University
- Beijing 100084
- P. R. China
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