Potential application of MoS2 nanoflowers as photocatalysts in cement: Strength, hydration, and dye degradation properties

被引：19

作者：

Lin, Run-Sheng ^{[1
,2
]}

Kim, Taewan ^{[1
,2
]}

Wang, Xiao-Yong ^{[1
,2
]}

Du, Wei ^{[3
]}

机构：

[1] Kangwon Natl Univ, Dept Architectural Engn, Chuncheon-si, South Korea

[2] Kangwon Natl Univ, Dept Integrated Energy & Infra Syst, Chuncheon-si, South Korea

[3] Ningbo Univ, Sch Mat Sci & Chem Engn, Ningbo 315211, Peoples R China

来源：

JOURNAL OF CLEANER PRODUCTION | 2022年 / 330卷

基金：

新加坡国家研究基金会;

关键词：

Photocatalysis; Dye degradation; Hydration; Portland cement; MoS2; nanoflowers; NANO-SILICA; RHODAMINE; 6G; DOPED TIO2; PERFORMANCE; LIMESTONE; CONCRETE; POWDER; MECHANISMS; REMOVAL;

D O I：

10.1016/j.jclepro.2021.129947

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

A new method using MoS2 nanoflowers to prepare cement paste for degradable dyes is proposed. In this study, MoS2 nanoflowers were synthesized and applied to improve the hydration rate and dye degradation performance of cement. The effects of MoS2 on the hydration, strength, microstructure, hydration products, and dye degradation performance of the cement system were systematically studied. The main conclusions of this study are as follows: (1) MoS2 nanoflowers (0.5 wt% and 1 wt%) show a nucleation effect and can promote early cement hydration. The promotion effect of MoS2 in the later stage of hydration is not as remarkable as in the early stage; (2) Although MoS2 does not change the type of cement hydration products, it slightly affects the amounts produced. After adding MoS2, the cumulative pore volume is slightly reduced; (3) Compared to a plain specimen, the MoS2-blended cement specimen shows a better degradation effect on rhodamine 6G. The presence of MoS2 in the cement paste promotes the photobleaching effect for rhodamine 6G degradation.

引用

页数：15