| MOFs自牺牲模板法制备ZnO及其对NO2的气敏性能 |
| MOFs Self-Sacrifice Template Preparation and NO2 Gas Sensing Performance of ZnO |
| 作者 | 单位 | E-mail | | 陈沭璇 | 齐齐哈尔大学化学与化学工程学院, 精细化工黑龙江省省属高校重点实验室, 齐齐哈尔 161006 | | | 贾丽华 | 齐齐哈尔大学化学与化学工程学院, 精细化工黑龙江省省属高校重点实验室, 齐齐哈尔 161006 | jlh29@163.com | | 郭祥峰 | 广东石油化工学院化学学院, 茂名 525000 | | | 赵振龙 | 齐齐哈尔大学化学与化学工程学院, 精细化工黑龙江省省属高校重点实验室, 齐齐哈尔 161006 | | | 杨瑞 | 齐齐哈尔大学化学与化学工程学院, 精细化工黑龙江省省属高校重点实验室, 齐齐哈尔 161006 | | | 王欣 | 齐齐哈尔大学化学与化学工程学院, 精细化工黑龙江省省属高校重点实验室, 齐齐哈尔 161006 | |
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| 摘要: 以硝酸锌和2，5-二羟基对苯二甲酸为原料，采用溶剂热法制备了Zn-MOF-74，并利用MOFs自牺牲模板法制备了ZnO纳米材料。利用热重-差示扫描量热法（TG-DSC）、X射线衍射（XRD）、红外光谱测试（FT-IR）、X射线光电子能谱测试（XPS）、氮气吸附-脱附、扫描电镜（SEM）和高倍透射电镜（HRTEM）等方法对合成的样品进行了结构表征。研究了煅烧温度对产物结构、形貌和组成的影响，以及材料的气敏传感性能。结果表明，450℃煅烧Zn-MOF-74制备的六方柱状介孔氧化锌（ZnO450）是由直径约为20 nm的粒子组成的纳米片堆叠形成的，表面残留部分有机官能团，且吸附氧含量明显高于350和550℃处理的样品。基于ZnO 450的气敏传感器选择性响应NO2气体，对100 mL·m-3的NO2气体响应值达到了77.40，是所测试的其他气体响应值的6~105倍，检出限为0.1 mL·m-3；并且在有SO2等气体共存时，对NO2的响应值基本不变，抗干扰能力强。该传感器对NO2优异的响应能力是由于材料表面吸附氧含量高、比表面积及孔径较大，这些有利于NO2的吸附、表面反应和扩散。 |
| 关键词: 金属有机框架 自牺牲模板法 ZnO 传感器 气敏 NO2 |
| 基金项目: 黑龙江省省属高校基本科研业务费科研项目（No.TSTAU-R2018006，135409404，135309116）资助。 |
| Abstract: An efficient self-sacrifice template method of Zn-MOF-74 was used to fabricate ZnO nanomaterials which exhibited selective and sensitive gas sensing response to NO2. Herein, the precursor of Zn-MOF-74 was synthesized via solvothermal strategy, and subsequently calcinated at different temperatures to gain ZnO nanomaterials. The structure, morphology, and sensing property of ZnO nanomaterials were investigated using thermogravimetric-differential scanning calorimetry (TG-DSC), X-ray diffraction (XRD), infrared spectroscopy (FT-IR), X-ray photo-electron spectroscopy (XPS), nitrogen adsorption-desorption, scanning electron microscopy (SEM) and high power transmission electron microscopy (HRTEM). The results show that hexagonal columnar structure of ZnO450, which was obtained from calcination of Zn-MOF-74 at 450℃, was stacked by nanosheets composed of nanoparticles with average size of 20 nm, and some organic functional groups remaining on the surface as well as the absorbed oxygen content was obviously higher than that of samples calcinated at 350 and 550℃. The response of the sensor based on ZnO 450 to 100 mL·m-3 NO2 reached 77.40 which was 6~105 times higher than that of the selective gases. In addition, the low detection limit was 0.1 mL·m-3. Moreover, the response to NO2 was remain unchanged in the coexistence of the gases such as SO2, et al, indicating strong anti-interference ability. The sensor's excellent response to NO 2 is due to the high adsorbed oxygen content on the surface, and the large specific surface area and pore diameter, which are conducive to NO2 adsorption, surface reaction and diffusion. |
| Keywords: metal-organic frameworks self-sacrifice template method ZnO sensors gas sensing NO2 |
| 投稿时间：2020-01-08 修订日期：2020-06-09 |
| 摘要点击次数: 2054 |
| 全文下载次数: 635 |
| 陈沭璇,贾丽华,郭祥峰,赵振龙,杨瑞,王欣.MOFs自牺牲模板法制备ZnO及其对NO2的气敏性能[J].无机化学学报,2020,36(9):1639-1648. |
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