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Peer-reviewedCC BY 4.0ACS Omega

Valorization of Rice Husk through the Development of New Materials of Silica Functionalized with Phthaloyl Diamide Ligands: Characterization, Isomer Effect, Ag+ Adsorption Investigation, and Antibacterial Activity

  • Brenda Mello Franco1
  • Tauana Fernanda Jantsch Voigt2
  • Juliana Felipetto Cargnelutti3
  • Sabrina Frantz Lütke1,3
  • Cristiano Rodrigo Bohn Rhoden4
  • Marcos Leandro Silva Oliveira5
  • Luis Felipe Oliveira Silva5
  • Guilherme Luiz Dotto1
5 affiliations
  1. 1Universidade Federal de Santa Maria , , Av. Roraima, 1000-7 , ,
  2. 2Universidade Federal de Santa Maria, Graduate Program in Veterinary Medicine , Av. Roraima, 1000 , ,
  3. 3Universidade Federal de Santa Maria , , Av. Roraima, 1000 , ,
  4. 4Universidade Franciscana , , , ,
  5. 5Corporacion Universitaria de la Costa , Calle 58 #55−66 , , ,
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Abstract

Silica was obtained from rice husk, a low-cost and abundant agricultural waste, and chemically modified with three phthaloyl diamide ligand isomers, aiming to develop new materials with adsorptive and antibacterial potential. The prepared adsorbents were fully characterized, confirming the successful functionalization. The isomeric structure of the ligands significantly influenced both the uniformity and extent of functionalization and the Ag+ adsorption efficiency. The Ag+ adsorption was favored at pH 5.0 and room temperature, and the adsorption rate was very fast, reaching equilibrium in about 15 min. The maximum adsorption capacity was 19.94 mg g–1. Antibacterial tests demonstrated that the Ag+-loaded adsorbent exhibited marked antibacterial activity against Escherichia coli, highlighting the dual functionality of the synthesized material. These results underscore the potential of phthaloyl-modified rice husk-derived silica as a novel and effective material for integrated Ag+ removal and antibacterial protection.

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Cite

BibTeXRIS
BibTeX
@article{franco2026valorization,
  title = {{Valorization of Rice Husk through the Development of New Materials of Silica Functionalized with Phthaloyl Diamide Ligands: Characterization, Isomer Effect, Ag+ Adsorption Investigation, and Antibacterial Activity}},
  author = {Brenda Mello Franco and Tauana Fernanda Jantsch Voigt and Juliana Felipetto Cargnelutti and Sabrina Frantz Lütke and Cristiano Rodrigo Bohn Rhoden and Marcos Leandro Silva Oliveira and Luis Felipe Oliveira Silva and Guilherme Luiz Dotto},
  journal = {ACS Omega},
  year = {2026},
  month = oct,
  doi = {10.1021/acsomega.6c04955},
  url = {https://pubs.acs.org/acsodf/article/doi/10.1021/acsomega.6c04955/5460350/Valorization-of-Rice-Husk-through-the-Development},
  note = {CC BY 4.0},
}
RIS
TY  - JOUR
TI  - Valorization of Rice Husk through the Development of New Materials of Silica Functionalized with Phthaloyl Diamide Ligands: Characterization, Isomer Effect, Ag+ Adsorption Investigation, and Antibacterial Activity
AU  - Brenda Mello Franco
AU  - Tauana Fernanda Jantsch Voigt
AU  - Juliana Felipetto Cargnelutti
AU  - Sabrina Frantz Lütke
AU  - Cristiano Rodrigo Bohn Rhoden
AU  - Marcos Leandro Silva Oliveira
AU  - Luis Felipe Oliveira Silva
AU  - Guilherme Luiz Dotto
PY  - 2026
DA  - 2026/10/28
JO  - ACS Omega
DO  - 10.1021/acsomega.6c04955
UR  - https://pubs.acs.org/acsodf/article/doi/10.1021/acsomega.6c04955/5460350/Valorization-of-Rice-Husk-through-the-Development
AB  - Silica was obtained from rice husk, a low-cost and abundant agricultural waste, and chemically modified with three phthaloyl diamide ligand isomers, aiming to develop new materials with adsorptive and antibacterial potential. The prepared adsorbents were fully characterized, confirming the successful functionalization. The isomeric structure of the ligands significantly influenced both the uniformity and extent of functionalization and the Ag+ adsorption efficiency. The Ag+ adsorption was favored at pH 5.0 and room temperature, and the adsorption rate was very fast, reaching equilibrium in about 15 min. The maximum adsorption capacity was 19.94 mg g–1. Antibacterial tests demonstrated that the Ag+-loaded adsorbent exhibited marked antibacterial activity against Escherichia coli, highlighting the dual functionality of the synthesized material. These results underscore the potential of phthaloyl-modified rice husk-derived silica as a novel and effective material for integrated Ag+ removal and antibacterial protection.
SN  - 2470-1343
ER  -