Boosting the consolidation and antibacterial dual-functionalities of Ca(OH)2 mural restoration materials via supporting Ag/g-C3N4 on hexagonal nano-Ca(OH)2
Ting Zhao , Yu-Tong Kou , Nian-Chen Ding , Jian-Feng Zhu , Wen-Zong Yang , Yi Liu , Yi Qin
{"title":"Boosting the consolidation and antibacterial dual-functionalities of Ca(OH)2 mural restoration materials via supporting Ag/g-C3N4 on hexagonal nano-Ca(OH)2","authors":"Ting Zhao , Yu-Tong Kou , Nian-Chen Ding , Jian-Feng Zhu , Wen-Zong Yang , Yi Liu , Yi Qin","doi":"10.1016/j.culher.2025.03.006","DOIUrl":null,"url":null,"abstract":"<div><div>Ca(OH)<sub>2</sub> is a well-known commercial inorganic consolidation material, which is used to restore tomb murals. Herein, nano-Ca(OH)<sub>2</sub> with a high specific surface grown by molecular confinement method was supported with photocatalyst Ag/g-C<sub>3</sub>N<sub>4</sub> to form a highly permeable Ag/g-C<sub>3</sub>N<sub>4</sub>/Ca(OH)<sub>2</sub>, which achieved consolidation and antibacterial properties of simulated murals. Ag/g-C<sub>3</sub>N<sub>4</sub>/Ca(OH)<sub>2</sub> forms a unique gradient permeation structure on tomb murals. In this structure, the Ca(OH)<sub>2</sub> nanomaterial penetrates deeply, while the Ag/g-C<sub>3</sub>N<sub>4</sub>-rich layers remain on the mural surfaces. The Ag/g-C<sub>3</sub>N<sub>4</sub>-rich layer effectively protects the murals from bacteria. The results indicate that the Ag/g-C<sub>3</sub>N<sub>4</sub>/Ca(OH)<sub>2</sub> nanocomposite significantly enhances the mural's strength and antibacterial properties when the silver ion doping content is 0.24. Its strengthening performance is 2 times higher than commercial Ca(OH)<sub>2</sub>, while its antibacterial rate reaches 58.38 %, primarily due to its high permeability and stability. Further aging experiments indicate that the synthesized Ag<sub>0.24</sub>/g-C<sub>3</sub>N<sub>4</sub>/Ca(OH)<sub>2</sub> nanocomposite has no adverse effect on the mural's pigment layer. This work offers a new method for developing effective materials to protect tomb murals.</div></div>","PeriodicalId":15480,"journal":{"name":"Journal of Cultural Heritage","volume":"73 ","pages":"Pages 172-184"},"PeriodicalIF":3.5000,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Cultural Heritage","FirstCategoryId":"103","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1296207425000494","RegionNum":2,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"0","JCRName":"ARCHAEOLOGY","Score":null,"Total":0}
引用次数: 0
Abstract
Ca(OH)2 is a well-known commercial inorganic consolidation material, which is used to restore tomb murals. Herein, nano-Ca(OH)2 with a high specific surface grown by molecular confinement method was supported with photocatalyst Ag/g-C3N4 to form a highly permeable Ag/g-C3N4/Ca(OH)2, which achieved consolidation and antibacterial properties of simulated murals. Ag/g-C3N4/Ca(OH)2 forms a unique gradient permeation structure on tomb murals. In this structure, the Ca(OH)2 nanomaterial penetrates deeply, while the Ag/g-C3N4-rich layers remain on the mural surfaces. The Ag/g-C3N4-rich layer effectively protects the murals from bacteria. The results indicate that the Ag/g-C3N4/Ca(OH)2 nanocomposite significantly enhances the mural's strength and antibacterial properties when the silver ion doping content is 0.24. Its strengthening performance is 2 times higher than commercial Ca(OH)2, while its antibacterial rate reaches 58.38 %, primarily due to its high permeability and stability. Further aging experiments indicate that the synthesized Ag0.24/g-C3N4/Ca(OH)2 nanocomposite has no adverse effect on the mural's pigment layer. This work offers a new method for developing effective materials to protect tomb murals.
期刊介绍:
The Journal of Cultural Heritage publishes original papers which comprise previously unpublished data and present innovative methods concerning all aspects of science and technology of cultural heritage as well as interpretation and theoretical issues related to preservation.