Using sodium lignosulfonate(LS) as a raw material and polyvinyl alcohol as an adhesive, a sodium lignosulfonate fluorescence membrane was prepared. The morphology and optical properties of LS were analyzed by fluorescence spectrometer and nano-size analyzer, and the quenching effect and mechanism of LS fluorescence by nitro compounds and non-nitro compounds were studied. Additionally, sodium lignosulfonate fluorescence membrane was applied for nitro-explosive detection. The results showed that LS had the property of aggregation induced emissions. The fluorescence quenching degree of LS by nitrobenzene and p-nitrophenol was as high as 90%, and the fluorescence of LS by m-dinitrobenzene was 56%, while benzene, toluene, phenol, terephthalic acid, terephthalaldehyde, o-phthalaldehyde and other nitro-free compounds almost had no fluorescence quenching effect on LS. This indicated that LS had high sensitivity and specific detection performances for nitrobenzene, m-dinitrobenzene, p-nitrophenol and other nitro-compound, which was mainly owing to the photoinduced electron transfer mechanism. The degrees of fluorescence extinction of the sodium lignosulfonate membrane immersed in the nitrobenzene solution, the m-dinitrobenzene solution and the p-nitrophenol solution were 89%, 78% and 100%, respectively. When the nitro compound solution was used to write on the fluorescent film, the handwriting could not be observed under sunlight, while the obvious fluorescence quenching phenomenon could be observed in the handwriting part under ultraviolet light.
