The environmental influence (with alkaline and acid components) on the luminescence character of SnO2 nanoparticles’ ensembles in a porous silicate glass matrix was studied. The established changes in the luminescence are associated with the interaction nature of alkaline or acid ions with nanoparticles in the pores of silicate glass. A sharp drop in the radiation intensity is due to the formation of unstable ammonia complexes SnO2[NH3] in the alkaline environmental with a large capture cross section. Such complexes are not formed in an acidic environmental, and a slow and smooth change in the photoluminescence intensity is associated with the penetration of HCl molecules into the pores with subsequent dissociation. A correlation was also established between the changes in luminescence behavior and the composition of the initial solution for the porous matrix impregnation. The possibility of spontaneous restoration of the initial characteristics of the investigated material is established. This and its almost absolute chemical resistance make it possible to use an ensemble of SnO2 nanoparticles in silicate porous glass as an active working material for a luminescent ammonia sensor.

中文翻译：

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活性环境对多孔基体中 SnO2 纳米粒子集合体发光的影响

研究了环境对多孔硅酸盐玻璃基质中 SnO2 纳米颗粒的发光特性的影响（具有碱性和酸性成分）。已确定的发光变化与碱性或酸性离子与硅酸盐玻璃孔中纳米粒子的相互作用有关。辐射强度的急剧下降是由于在具有大捕获截面的碱性环境中形成了不稳定的氨络合物 SnO2[NH3]。这种复合物不是在酸性环境中形成的，光致发光强度的缓慢而平滑的变化与 HCl 分子渗透到孔隙中并随后解离有关。在发光行为的变化与多孔基质浸渍的初始溶液的组成之间也建立了相关性。建立了自发恢复所研究材料的初始特性的可能性。这及其几乎绝对的耐化学性使得在硅酸盐多孔玻璃中使用 SnO2 纳米粒子的集合作为发光氨传感器的活性工作材料成为可能。