Page 84 - 《精细化工》2022年第1期
P. 84

第 39 卷第 1 期                             精   细   化   工                                  Vol.39, No.1
             202 2 年 1 月                             FINE CHEMICALS                                  Jan.  2022


              功能材料
                 空心纳米 Ni@SiO 复合材料的制备及其催化性能
                                                 2


                                             2
                                                          1
                                                                       1
                                                                                   1
                                                                                                1*
                                1
                       高   睿 ,韩美玲 ,黄丽丽 ,王添巍 ,张淑芬 ,吕荣文
                 (1.  大连理工大学  精细化工国家重点实验室,辽宁  大连  116024;2.  大连海事大学  航海学院,辽宁  大
                 连  116026)
                 摘要:分别在非离子表面活性剂聚醚 L44、聚醚 L64、壬基酚聚氧乙烯醚 NP-7、脂肪醇聚氧乙烯醚 AEO-7、曲
                 拉通 X-100 和聚乙二醇十六烷基醚(Brij-58)与环己烷构成的反相微乳液体系中,从 Ni(NO 3 ) 2 出发,经水合肼
                 还原、正硅酸四乙酯水解包覆、焙烧、还原,得到不同结构的空心纳米 SiO 2 包覆镍(Ni@SiO 2 )复合材料。通
                 过 TEM、XRD 表征材料结构和组成。结果显示,以聚醚 L44、聚醚 L64、NP-7、AEO-7 和曲拉通 X-100 为模
                 板时,制备出管状空心纳米 Ni@SiO 2 ;以 Brij-58 为模板剂时,制备出球形空心 Ni@SiO 2 -Brij-58。对空心
                 Ni@SiO 2 -Brij-58 形成机理进行了研究。以催化 NaBH 4 还原对硝基苯酚为模型反应,研究了空心 Ni@SiO 2 -Brij-58
                 的催化性能,结果表明,15 min 内反应完全,对硝基苯酚转化率 97.6%。
                 关键词:Ni@SiO 2 ;反相微乳液体系;非离子表面活性剂;催化;功能材料
                 中图分类号:O69      文献标识码:A      文章编号:1003-5214 (2022) 01-0074-06


                    Synthesis and catalytic activity of hollow nano Ni@SiO 2 composites


                                                                                      1
                           1
                                                                                                      1*
                                         2
                                                      1
                                                                      1
                  GAO Rui , HAN Meiling , HUANG Lili , WANG Tianwei , ZHANG Shufen , LYU Rongwen
                 (1. State Key Laboratory of  Fine Chemicals, Dalian University of  Technology, Dalian  116024, Liaoning, China;
                 2. College of Navigation, Dalian Maritime University, Dalian 116026, Liaoning, China)
                 Abstract: Nickel nitrate was added into the reverse micelle systems formed by cyclohexane and non-ionic
                 surfactants polyether L44, polyether  L64, nonyl phenol ethoxylate  NP-7,  alcohol polyoxyethylene ether
                 AEO-7, Triton X-100 and polyethylene glycol hexanyl ether (Brij-58), respectively. And the above systems
                 were reduced by hydrazine hydrate, coated by tetraethyl orthosilicate hydrolysis, roasted and reduced to
                 give hollow nano SiO 2 coated nickel (Ni@SiO 2) composites with different structures. The as-synthesized
                 products  were characterized by TEM and XRD.  The results showed that  hollow  spherical Ni@SiO 2
                 composite (Ni@SiO 2-Brij-58) was obtained  using Brij-58  as template and hollow tubular  Ni@SiO 2
                 composites  were  prepared using polyether L44, polyether  L64, nonyl phenol  ethoxylate  NP-7,  alcohol
                 polyoxyethylene ether  AEO-7 and Triton  X-100 as templates. The formation mechanism of  Ni@SiO 2-
                 Brij-58 was also investigated. The  reduction of  p-nitrophenol in the  presence of a catalytic amount of
                 NaBH 4 as model reaction was used to test the catalytic activity of Ni@SiO 2-Brij-58. It was found that the
                 reaction was complete within 15 min, and the conversion rate of p-nitrophenol was 97.6%.
                 Key words: Ni@SiO 2; reverse microemulsion system; non-ionic surfactants; catalysis; functional materials


                 空心核-壳纳米材料        [1-5] 具有低密度、高比表面             构可以阻止纳米粒子发生团聚,使金属催化剂和壳体之
            积、良好热稳定性等特点,在催化纳米反应器、控                             间的相互作用更有效,赋予催化剂更高的催化性能                   [17-19] 。
            制释放、传感及药物输送等领域表现出优越的性能                                 已有研究证实,通过 SiO 2 稳定的金属催化剂具
            [6-11] 。由于金属纳米粒子具有较高的表面能,通过核-                      有良好的催化加氢活性,特别是金属镍,其在自然

            壳结构对纳米金属粒子催化剂进行包覆                 [12-16] ,这种结     界中大量存在,并且价格较为低廉。因此,通过不


                 收稿日期:2021-03-06;  定用日期:2021-06-11; DOI: 10.13550/j.jxhg.20210413
                 基金项目:国家自然科学基金(22078044);大连高层次人才创新支持计划(2019RD06)
                 作者简介:高   睿(1993—),男,硕士生。联系人:吕荣文(1961—),女,教授,E-mail:lurw@dlut.edu.cn。
   79   80   81   82   83   84   85   86   87   88   89