In order to effectively solve the problem of pollutant degradation in cement-based materials, the BiVO₄ was introduced into the reconstruction of the water-encountered MgAl-LDHs layer after calcination utilizing the memory effect of MgAl-LDHs which successfully prepared the highly adsorbable visible light photocatalytic material, BiVO₄/MgAl-LDHs. Its layered structure results in a large specific surface area with more active sites, promotes the growth and development of crystal nuclei, and thus accelerates cement hydration. Also, the nanofilling effect can optimize the microstructure and improve the mechanical properties of the cement paste. It is noteworthy that excessive BiVO₄/MgAI-LDHs will weaken the aforementioned promotions due to the reduction in the number of active species and heterogeneous defects. In the self-cleaning performance test, the specimens prepared by the coating method showed better behavior, whose degradation outcome was close to that of BiVO₄/MgAl-LDHs on methylene blue (MB) solution with a degradation rate of up to 89.2%, once again confirming that BiVO₄/MgAl-LDHs possesses good chemical stability. The test for the durability of photocatalytic efficiency demonstrated that the specimens produced by the polyvinyl chloride (PVC) film loading method performed better. The above two performance tests illustrate that the number of BiVO₄/MgAl-LDHs molecules on the paste surface plays a major role in the degradation of MB solution.

中文翻译：

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吸附铋基可见光光催化材料的制备及其对水泥基材料性能的影响


为有效解决水泥基材料中的污染物降解问题，利用MgAl-LDHs的记忆效应，将BiVO₄引入煅烧后遇水MgAl-LDHs层的重构中，成功制备了高吸附性可见光光催化材料BiVO₄/MgAl-LDHs的其层状结构导致比表面积大，活性位点更多，促进晶核的生长和发育，从而加速水泥水化。此外，纳米填充效应可以优化水泥浆的微观结构并改善水泥浆的力学性能。值得注意的是，由于活性物质数量的减少和异质性缺陷，过量的 BiVO₄/MgAI-LDHs 会削弱上述促进作用。在自清洁性能测试中，涂覆法制备的样品表现出较好的行为，其降解结果接近BiVO₄/MgAl-LDHs在亚甲蓝（MB）溶液上的降解结果，降解率高达89.2%，再次证实了BiVO₄/MgAl-LDHs具有良好的化学稳定性。光催化效率耐久性测试表明，聚氯乙烯 （PVC） 薄膜加载法制备的试样性能更好。以上两项性能测试表明，浆体表面BiVO₄/MgAl-LDHs分子的数量在MB溶液的降解中起主要作用。