Fe 3 O 4 @SiO 2 -SO 3 H nanocomposites: an efficient magnetically separable solid acid catalysts for esterification reaction

Micro & nano letters

article

Jing Li¹  Hongxiao Zhao¹  Xufeng Hou¹  Wenjun Fa¹  Junhui Cai¹ 

[1] Key Laboratory for Micro-Nano Energy Storage and Conversion Materials of Henan Province, College of Advanced Materials and Energy, Institute of Surface Micro and Nano Materials, Xuchang University

关键词: organic compounds;    nanofabrication;    recycling;    chromatography;    reaction rate constants;    adsorption;    Fourier transform infrared spectra;    transmission electron microscopy;    scanning electron microscopy;    X-ray diffraction;    catalysts;    catalysis;    nanocomposites;    silicon compounds;    iron compounds;    nanocomposites;    magnetically separable solid acid catalysts;    esterification reaction;    X-ray diffraction;    scanning electron microscopy;    transmission electron microscopy;    Fourier transform infrared spectroscopy;    vibrating sample magnetometry;    VSM;    nitrogen physical adsorption;    Brunauer-Emmett-Teller theory;    catalytic activities;    n-butyl acetate;    isoamyl acetate;    acid esterification rate;    gas chromatography;    n-butyl alcohol;    isoamyl alcohol;    magnetic bar;    recycling;    sulphonic acid;    SO3H;    Fe3O4-SiO2;   

DOI  :  10.1049/mnl.2016.0463

学科分类：计算机科学（综合）

来源: Wiley

【 摘 要 】

Background & Aims: Incidence of anterior cruciate ligament (ACL) tearing is especially high in athletes, and reconstruction surgery is often required, associated with severe post-operative pain requiring active interventions. In the present study we compared the continuous intravenous morphine infusion technique with femoral nerve block regarding efficacy of pain management and patients’ satisfaction, so that the best post-operative pain management for ACL reconstruction can be decided. Methodology: We recruited 54 patients for this study and divided them randomly in 2 equal groups; Group-A (continuous intravenous morphine infusion) and Group-B (femoral nerve block). Femoral block for coded subjects was performed at the end of the surgery right before shifting the patient. For patients in the other group, catheter was inserted for continuous infusion after extubation and transfer to recovery room. Pain intensity was assessed and recorded in recovery service and right after complete consciousness, and then every 4 hours by trained nurses of the department, using visual analogue scale (VAS). After complete consciousness and every 12 hours, patients’ satisfaction from post-operative analgesia was questioned and recorded, using five Likert scale items. Post-operative complication were recorded. Results: The pain in Group-A (the continuous infusion pump group) at 20 and 24 hours after surgery was significantly lower than Group-B (nerve block group) (p<0.05). Post-operative complications (especially nausea) in femoral nerve block was lower. Conclusion: Analgesic degree of nerve block is comparable with the impact of continuous infusion pump at least during 20 hours after anterior cruciate ligament reconstruction surgery.

【 授权许可】

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