In this study, ZnSnO₃/NiO heterostructures were synthesized using a co-precipitation method followed by an annealing process. The gas-sensitive characteristics of the sensors based on these samples were evaluated. The results indicate that the sensor performance was optimized when the molar ratio of Ni to Zn was 1∶2. Specifically, the response values of the ZnSnO₃/NiO-2-based sensor to 100 μL·L^-1 triethylamine (TEA) gas at 220 ℃ reached 70.6, which were 6.1 times higher than that of the pure ZnSnO₃ based sensor. The findings demonstrate that ZnSnO₃/NiO heterostructures exhibited not only short response and recovery times (1 s/18 s) but also good gas selectivity, repeatability, and long-term stability. The enhanced sensing mechanism has been investigated in detail.

面向化学类(非高分子)专业的高分子化学实验教学发展较为缓慢，亟需紧跟研究前沿，引入新内容。本文总结了近十年的教学改革经验，并以温敏型高分子的制备、溶液性质、光学性能与应用为例，介绍如何通过实验教学内容、实验技术、教学方法等方面的创新，设计符合理科人才培养需求的、契合时代与科学发展的、被学生喜爱与重视的一系列高分子化学实验，以有效解决培养需求与课业负担之间的矛盾，且在不新增开课、课时有限的情况下，加入到化学类专业本科教学体系中，激发学生对学科领域的兴趣，提升学生的探究和创新能力。

(2E, 6E)-4-methyl-2, 6-bis(pyridin-3-ylmethylene)cyclohexan-1-one (L₁) and 4-methyl-2, 6-bis[(E)-4-(pyridin-4-yl)benzylidene]cyclohexan-1-one (L₂) were synthesized and combined with isophthalic acid (H₂IP), then under solvothermal conditions, to react with transition metals achieving four novel metal organic frameworks (MOFs): [Zn(IP)(L₁)]_n (1), {[Cd(IP)(L₁)]·H₂O}_n (2), {[Co(IP)(L₁)]·H₂O}_n (3), and [Zn(IP)(L₂)(H₂O)]_n (4). MOFs 1-4 have been characterized by single-crystal X-ray diffraction, powder X-ray diffraction, thermogravimetry, and elemental analysis. Single-crystal X-ray diffraction shows that MOF 1 crystallizes in the monoclinic crystal system with space group P2₁/n, and MOFs 2-4 belong to the triclinic system with the P1 space group. 1-3 are 2D sheet structures, 2 and 3 have similar structural characters, whereas 4 is a 1D chain structure. Furthermore, 1-3 exhibited certain photocatalytic capability in the degradation of rhodamine B (RhB) and pararosaniline hydrochloride (PH). 4 could be used as a heterogeneous catalyst for the Knoevenagel reaction starting with benzaldehyde derivative and malononitrile. 4 could promote the reaction to achieve corresponding products in moderate yields within 3 h. Moreover, the catalyst exhibited recyclability for up to three cycles without significantly dropping its activity. A mechanism for MOF 4 catalyzed Knoevenagel condensation reaction of aromatic aldehyde and malononitrile has been initially proposed.