Entomology Department, Faculty of Science, Ain Shams University, Cairo, Egypt.
Chemistry Department, Faculty of Science, Ain Shams University, Cairo, Egypt.
Neotrop Entomol. 2023 Jun;52(3):500-511. doi: 10.1007/s13744-023-01037-1. Epub 2023 Mar 13.
Cinnamon (Cinnamomum zeylanicum Blume) essential oil has vast potential as an antimicrobial but is limited by its volatility and rapid degradation. To decrease its volatility and prolong the efficacy of the biocide, cinnamon essential oil was encapsulated into mesoporous silica nanoparticles (MSNs). The characterization of MSNs and cinnamon oil encapsulated with silica nanoparticles (CESNs) was estimated. Additionally, their insecticidal activity against the rice moth Corcyra cephalonica (Stainton) larvae was evaluated. The MSN surface area decreased from 893.6 to 720 m g and the pore volume also decreased from 0.824 to 0.7275 cc/g after loading with cinnamon oil. X-ray diffraction, Fourier transform infrared spectroscopy (FTIR), energy-dispersive X-ray spectroscopy (EDX), and N2 sorption by Brunauer-Emmett-Teller (BET) confirmed the successful formation and evolution of the synthesized MSNs and CESN structures. The surface characteristics of MSNs and CESNs were analyzed by scanning and transmission electron microscopy. Compared with the sub-lethal activity values, the order of toxicity after 6 days of exposure was MSNs ˃ CESN ˃ cinnamon oil ˃ silica gel ˃ peppermint oil. The efficacy of CESNs gradually increases its toxicity more than MSN after the 9th day of exposure.
肉桂（Cinnamomum zeylanicum Blume）精油具有巨大的抗菌潜力，但由于其挥发性和快速降解性而受到限制。为了降低其挥发性并延长杀菌剂的功效，将肉桂精油包封到介孔硅纳米粒子（MSNs）中。对 MSNs 和用硅纳米粒子包封的肉桂油（CESNs）进行了表征。此外，还评估了它们对稻螟（Corcyra cephalonica（Stainton）幼虫的杀虫活性。负载肉桂油后，MSN 的表面积从 893.6 降至 720 m²/g，孔体积也从 0.824 降至 0.7275 cc/g。X 射线衍射、傅里叶变换红外光谱（FTIR）、能谱（EDX）和 Brunauer-Emmett-Teller（BET）的氮气吸附证实了合成的 MSNs 和 CESN 结构的成功形成和演变。通过扫描和透射电子显微镜分析了 MSNs 和 CESNs 的表面特性。与亚致死活性值相比，暴露 6 天后的毒性顺序为 MSNs ˃ CESN ˃肉桂油 ˃硅胶 ˃薄荷油。暴露 9 天后，CESNs 的功效逐渐增加，其毒性超过 MSN。
