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Author:

Li, Wenjing (Li, Wenjing.) | Wang, Qi (Wang, Qi.) | Zhang, Fang (Zhang, Fang.) | Shang, Hui (Shang, Hui.) | Bai, Shiyang (Bai, Shiyang.) | Sun, Jihong (Sun, Jihong.)

Indexed by:

Scopus SCIE PubMed

Abstract:

In this study, we synthesized pH-sensitive thiamethoxam-3-(2-aminoethylamino) propyl-bimodal mesoporous silica (P/Thi-NN-BMMs) nanoparticles (NPs). We used this bimodal mesoporous silica (BMMs) mesoporous material as a carrier based on the principle of free radical polymerization. The size of the P/Thi-NN-BMMs NPs was about 891.7 +/- 4.9 nm, with a zeta potential of about -25.7 +/- 2.5 mV. X-ray powder diffraction analysis, N-2-sorption measurements and thermogravimetric analysis indicated that thiamethoxam (Thi) was loaded into the pores of the mesoporous structure and that the mesopore surface was coated with polyacrylic acid (PAA). The loading rate of P/Thi-NN-BMMs was about 25.2%. The controlled-release NPs had excellent anti-photolysis performance and storage stability. The NPs showed significant pH sensitivity, and the Thi release rate in pH 10.0 phosphate buffer was higher than those in pH 7.4 and pH 3.0 phosphate buffers. We described the sustained-release curves according to the Weibull model. The relative toxicity of P/Thi-NN-BMMs against peach aphid was 1.44 times that of commercial Thi. This provides a promising instrument for effective insect control and environment protection.

Keyword:

controlled-release pH-sensitive nanoparticle pesticide bimodal mesoporous silica

Author Community:

  • [ 1 ] [Li, Wenjing]Beijing Univ Technol, Fac Environm & Life, Beijing 100124, Peoples R China
  • [ 2 ] [Wang, Qi]Beijing Univ Technol, Fac Environm & Life, Beijing 100124, Peoples R China
  • [ 3 ] [Zhang, Fang]Beijing Univ Technol, Fac Environm & Life, Beijing 100124, Peoples R China
  • [ 4 ] [Shang, Hui]Beijing Univ Technol, Fac Environm & Life, Beijing 100124, Peoples R China
  • [ 5 ] [Bai, Shiyang]Beijing Univ Technol, Fac Environm & Life, Beijing 100124, Peoples R China
  • [ 6 ] [Sun, Jihong]Beijing Univ Technol, Fac Environm & Life, Beijing 100124, Peoples R China

Reprint Author's Address:

  • [Zhang, Fang]Beijing Univ Technol, Fac Environm & Life, Beijing 100124, Peoples R China;;[Bai, Shiyang]Beijing Univ Technol, Fac Environm & Life, Beijing 100124, Peoples R China

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Source :

ROYAL SOCIETY OPEN SCIENCE

ISSN: 2054-5703

Year: 2021

Issue: 2

Volume: 8

3 . 5 0 0

JCR@2022

JCR Journal Grade:2

Cited Count:

WoS CC Cited Count: 1

SCOPUS Cited Count: 13

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 0

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