当前位置：
X-MOL 学术
›
ACS Appl. Nano Mater.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Hollow Zinc Oxide Microsphere–Multiwalled Carbon Nanotube Composites for Selective Detection of Sulfur Dioxide
ACS Applied Nano Materials ( IF 5.3 ) Pub Date : 2020-08-31 , DOI: 10.1021/acsanm.0c01707 Ni Luh Wulan Septiani 1 , Adhitya Gandaryus Saputro 1 , Yusuf Valentino Kaneti 2 , Arifin Luthfi Maulana 1 , Fadjar Fathurrahman 1, 3 , Hyunsoo Lim 4 , Brian Yuliarto 1, 3 , Nugraha 1, 3 , Hermawan Kresno Dipojono 1, 3 , Dmitri Golberg 2, 5 , Yusuke Yamauchi 2, 4, 6
ACS Applied Nano Materials ( IF 5.3 ) Pub Date : 2020-08-31 , DOI: 10.1021/acsanm.0c01707 Ni Luh Wulan Septiani 1 , Adhitya Gandaryus Saputro 1 , Yusuf Valentino Kaneti 2 , Arifin Luthfi Maulana 1 , Fadjar Fathurrahman 1, 3 , Hyunsoo Lim 4 , Brian Yuliarto 1, 3 , Nugraha 1, 3 , Hermawan Kresno Dipojono 1, 3 , Dmitri Golberg 2, 5 , Yusuke Yamauchi 2, 4, 6
Affiliation
|
This work reports the first utilization of anthocyanin extracted from black rice (Oryza sativa L.) grains as a structure-directing agent for the synthesis of hollow zinc oxide (ZnO) spheres via a simple solvothermal reaction and their subsequent modifications with various amounts of multiwalled carbon nanotubes (MWCNTs). Following hybridization with MWCNTs, some MWCNTs are observed to penetrate into the inner cavities of the spheres, while ZnO nanoparticles are formed on the surface of some MWCNTs. When employed as a sulfur dioxide (SO2) sensor, the ZnO–MWCNT (15:1) composite displays a high response of 156 to 70 ppm of SO2 at an optimum temperature of 300 °C as well as good selectivity to SO2 with the response to 50 ppm of SO2 gas being 3 times higher than those to other gases, such as CO, CO2, methanol, toluene, hexane, and xylene. Interestingly, the sensing behavior of this composite is strongly influenced by the proportion of MWCNTs. Specifically, n-type sensing behavior is observed for both ZnO–MWCNT (10:1) and (15:1) composites, while p-type behavior is observed for the ZnO–MWCNT (5:1) composite. The switch in sensing behavior suggests the major contribution of p-type MWCNTs to the electronic and sensing properties of the ZnO/MWCNT composites. The density functional theory (DFT) simulations on the adsorption of SO2 on the ZnO/CNT system reveal that the SO2 molecule only chemically interacts with the O adatom of ZnO (i.e., oxygen atom adsorbed on the surface of ZnO) to form sulfur trioxide (SO3), and charge transfer is observed from ZnO to CNT, which enhances the change in resistance of the composite sensor upon exposure to SO2 gas.
中文翻译：
空心氧化锌微球-多壁碳纳米管复合材料用于二氧化硫的选择性检测
这项工作报告了从黑米（Oryza sativa L.）谷物中提取的花色苷首次用作结构导向剂，通过简单的溶剂热反应合成空心的氧化锌（ZnO）球，并随后对其进行了修饰，并使用了多种多层壁碳纳米管（MWCNT）。与MWCNT杂交后，观察到一些MWCNT渗透到球的内腔中，而ZnO纳米颗粒形成在某些MWCNT的表面上。当用作二氧化硫（SO 2）传感器时，ZnO-MWCNT（15：1）复合材料在最佳温度为300°C时对SO 2的响应为156至70 ppm，并且对SO 2的选择性良好对50 ppm SO的响应2种气体比其他气体（例如CO，CO 2，甲醇，甲苯，己烷和二甲苯）的气体高3倍。有趣的是，这种复合材料的传感行为受到MWCNT的比例的强烈影响。特别是，对于ZnO-MWCNT（10：1）和（15：1）复合材料，都观察到n型传感行为，而对于ZnO-MWCNT（5：1）复合材料则观察到p型行为。传感行为的转变表明，p型MWCNT对ZnO / MWCNT复合材料的电子和传感特性有重要贡献。对ZnO / CNT系统中SO 2吸附的密度泛函理论（DFT）模拟表明，SO 2分子仅与ZnO的O原子发生化学相互作用（即，吸附在ZnO表面的氧原子）形成三氧化硫（SO 3），并且观察到电荷从ZnO向CNT转移，这增强了复合材料电阻的变化传感器暴露在SO 2气体中。
更新日期：2020-09-25
中文翻译：
空心氧化锌微球-多壁碳纳米管复合材料用于二氧化硫的选择性检测
这项工作报告了从黑米（Oryza sativa L.）谷物中提取的花色苷首次用作结构导向剂，通过简单的溶剂热反应合成空心的氧化锌（ZnO）球，并随后对其进行了修饰，并使用了多种多层壁碳纳米管（MWCNT）。与MWCNT杂交后，观察到一些MWCNT渗透到球的内腔中，而ZnO纳米颗粒形成在某些MWCNT的表面上。当用作二氧化硫（SO 2）传感器时，ZnO-MWCNT（15：1）复合材料在最佳温度为300°C时对SO 2的响应为156至70 ppm，并且对SO 2的选择性良好对50 ppm SO的响应2种气体比其他气体（例如CO，CO 2，甲醇，甲苯，己烷和二甲苯）的气体高3倍。有趣的是，这种复合材料的传感行为受到MWCNT的比例的强烈影响。特别是，对于ZnO-MWCNT（10：1）和（15：1）复合材料，都观察到n型传感行为，而对于ZnO-MWCNT（5：1）复合材料则观察到p型行为。传感行为的转变表明，p型MWCNT对ZnO / MWCNT复合材料的电子和传感特性有重要贡献。对ZnO / CNT系统中SO 2吸附的密度泛函理论（DFT）模拟表明，SO 2分子仅与ZnO的O原子发生化学相互作用（即，吸附在ZnO表面的氧原子）形成三氧化硫（SO 3），并且观察到电荷从ZnO向CNT转移，这增强了复合材料电阻的变化传感器暴露在SO 2气体中。
京公网安备 11010802027423号