当前位置：
X-MOL 学术
›
ACS Cent. Sci.
›
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.)
Visible-Light-Activated Type II Heterojunction in Cu3(hexahydroxytriphenylene)2/Fe2O3 Hybrids for Reversible NO2 Sensing: Critical Role of π–π* Transition
ACS Central Science ( IF 12.7 ) Pub Date : 2021-06-09 , DOI: 10.1021/acscentsci.1c00289 Young-Moo Jo 1 , Kyeorei Lim 1 , Ji Won Yoon 1 , Yong Kun Jo 1 , Young Kook Moon 1 , Ho Won Jang 2 , Jong-Heun Lee 1
ACS Central Science ( IF 12.7 ) Pub Date : 2021-06-09 , DOI: 10.1021/acscentsci.1c00289 Young-Moo Jo 1 , Kyeorei Lim 1 , Ji Won Yoon 1 , Yong Kun Jo 1 , Young Kook Moon 1 , Ho Won Jang 2 , Jong-Heun Lee 1
Affiliation
|
Metal–organic frameworks (MOFs) with high surface area, tunable porosity, and diverse structures are promising platforms for chemiresistors; however, they often exhibit low sensitivity, poor selectivity, and irreversibility in gas sensing, hindering their practical applications. Herein, we report that hybrids of Cu3(HHTP)2 (HHTP = 2,3,6,7,10,11-hexahydroxytriphenylene) nanoflakes and Fe2O3 nanoparticles exhibit highly sensitive, selective, and reversible detection of NO2 at 20 °C. The key parameters to determine their response, selectivity, and recovery are discussed in terms of the size of the Cu3(HHTP)2 nanoflakes, the interaction between the MOFs and NO2, and an increase in the concentration and lifetime of holes facilitated by visible-light photoactivation and charge-separating energy band alignment of the hybrids. These photoactivated MOF–oxide hybrids suggest a new strategy for designing high-performance MOF-based gas sensors.
中文翻译：
Cu3(hexahydroxytriphenylene)2/Fe2O3 杂化物中可见光激活的 II 型异质结用于可逆的 NO2 传感：π-π* 转变的关键作用
具有高表面积、可调孔隙率和多样化结构的金属有机框架 (MOF) 是化学电阻器的有前途的平台；然而，它们在气体传感中往往表现出低灵敏度、差选择性和不可逆性，阻碍了它们的实际应用。在本文中，我们报道了铜的杂种3（HHTP）2（HHTP = 2,3,6,7,10,11-六羟基）纳米片和Fe 2个ö 3纳米颗粒表现出高度敏感的，选择性的和NO的可逆检测2在20℃。根据 Cu 3 (HHTP) 2纳米薄片的尺寸、MOF 和 NO 之间的相互作用讨论了确定其响应、选择性和回收率的关键参数如图2所示，可见光光活化和杂化物的电荷分离能带排列促进了空穴浓度和寿命的增加。这些光活化的 MOF-氧化物杂化物提出了一种设计高性能 MOF 基气体传感器的新策略。
更新日期：2021-07-28
中文翻译：
Cu3(hexahydroxytriphenylene)2/Fe2O3 杂化物中可见光激活的 II 型异质结用于可逆的 NO2 传感：π-π* 转变的关键作用
具有高表面积、可调孔隙率和多样化结构的金属有机框架 (MOF) 是化学电阻器的有前途的平台；然而，它们在气体传感中往往表现出低灵敏度、差选择性和不可逆性，阻碍了它们的实际应用。在本文中，我们报道了铜的杂种3（HHTP）2（HHTP = 2,3,6,7,10,11-六羟基）纳米片和Fe 2个ö 3纳米颗粒表现出高度敏感的，选择性的和NO的可逆检测2在20℃。根据 Cu 3 (HHTP) 2纳米薄片的尺寸、MOF 和 NO 之间的相互作用讨论了确定其响应、选择性和回收率的关键参数如图2所示，可见光光活化和杂化物的电荷分离能带排列促进了空穴浓度和寿命的增加。这些光活化的 MOF-氧化物杂化物提出了一种设计高性能 MOF 基气体传感器的新策略。
京公网安备 11010802027423号