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SnO/SnO_(2) heterojunction:an alternative candidate for sensing NO_(2) with fast response at room temperature

Frontiers of Materials Science 2022年第3期16卷 193-202页

作者： Pengtao WANG Wanyin GE Xiaohua JIA Jingtao HUANG Xinmeng ZHANG Jing LU School of Materials Science and Engineering Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic MaterialsShaanxi University of Science and TechnologyXi'an 710021China School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001China

The SnO_(2)-based family is a traditional but important gas-sensitive ***,the requirement for high working temperature limits its practical *** work has been done to explore ways to improve its gas-sensing performance at room temperature(RT).For this report,SnO_(2),SnO,and SnO/SnO_(2) heterojunction was successfully synthesized by a facile hydrothermal combined with subsequent *** SnO_(2) requires a high operating temperature(145℃),while SnO/SnO_(2) heterojunction exhibits an excellent performance for sensing NO_(2) at ***,SnO/SnO_(2) exhibits a fast response,of 32 s,to 50 ppm NO_(2) at RT(27℃),which is much faster than that of SnO(139 s).The superior sensing properties of SnO/SnO_(2) heterojunction are attributed to the unique hierarchical structures,large number of adsorption sites,and enhanced electron *** results show that SnO/SnO_(2) heterojunction can be used as a promising high-performance NO_(2) sensitive material at RT.

关键词： SnO SnO_(2) heterostructure NO_(2) roomtemperature

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Highly efficient synthesis and application of aryl diazonium salts via femtosecond laser-tailored 3D flow microfluidic chips

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Chinese Chemical Letters 2023年第4期34卷 326-331页

作者： Jing Ren Miao Wu Kaiwu Dong Min Zhang Ya Cheng Guoyue Shi School of Chemistry and Molecular Engineering Shanghai Key Laboratory for Urban Ecological Processes and Eco-RestorationEast China Normal UniversityShanghai 200241China School of Physics and Electronic Science East China Normal UniversityShanghai 200241China

The first example of the microfluidic chips(MFCs) consisting of centimeter-level 3D channels with highdensity and large-volume fabricated by femtosecond laser micromachining were utilized to develop a time-saving, economical and hazardless flow synthesis process, and its advantages have been proved by in situ formation of aryldiazonium salts and subsequent borylation with bis(pinacolato)diboron. There are several important advantages in our 3D MFC-based flow synthesis technology, including the following:(1) the reaction temperature was altered from ice bath to room temperature;(2) the residence time was reduced by 10 times;(3) the yield was greatly improved, that is, several arylboronates were successfully obtained with higher yield compared to traditional batch process. Therefore, it can be envisioned that a novel, simplified flow synthetic protocol will be developed toward green organic synthesis via MFCs.

关键词： 3D microfluidic chips Femtosecondlasermicromachining Flow synthesis Aryldiazoniumsalts roomtemperature

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