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基于的技术纳米管的热水合成,用于从水溶液中有效和选择性地去除Cr (VI)
Qiongyao Wang1, Yongchang Sun1, Mingge Hao1
1Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, School of Water and Environment, Chang'an University, Xi'an 710054, China.
Molecules (Basel, Switzerland)
|August 12, 2023
概括
基于氨基化素的酸纳米管 (AL-TiNTs) 有效地从废水中去除重金属. 这些新型纳米管表现出高吸附能力和稳定性,显示出对环境修复应用的巨大希望.
科学领域:
- 材料科学 材料科学 材料科学
- 环境化学环境化学
- 纳米技术纳米技术
背景情况:
- 技术性木质素 (TL) 是一种生物质废物产物.
- 开发有效的方法来从废水中去除重金属至关重要.
- 纳米材料为环境应用提供了独特的特性.
研究的目的:
- 为了合成基于氨基化素的酸纳米管 (AL-TiNTs).
- 为了研究AL-TiNTs的重金属吸附和光催化降解能力.
- 评估AL-TiNTs在废水处理中的潜力.
主要方法:
- 通过曼尼赫反应对技术性质素 (TL) 的修改,以获得氨基质素 (AL).
- 基于氨基胺的酸纳米管 (AL-TiNTs) 的水热合成.
- 使用确认Ti-O键引入和纳米管状结构形成的技术,对AL-TiNTs进行表征.
- 对CrVI,Zn2+,Cd2+和Cu2+进行吸附实验.
- 在可见光下对Cr (VI) 的光催化降解.
主要成果:
- 与TL (5.9 m2/g) 相比,AL-TiNTs的特定表面积显著增加 (188.51 m2/g).
- 在可见光下,AL-TiNTs实现了99.80%的Cr6去除效率,并显示了在可见光下Cr6吸附能力为90.0 mg/g,同时降低到Cr7III.
- 对Zn2+ (63.78 mg/g),Cd2+ (59.20 mg/g) 和Cu2+ (66.35 mg/g) 观察到高吸附能力.
- 在四个循环后,AL-TiNTs的吸附能力保持在40 mg/g以上,并在模拟废水中显示了95.86%的Cr (VI) 除去.
结论:
- 基于氨基素的氨基酸纳米管 (AL-TiNTs) 已成功合成.
- AL-TiNTs在吸附和光催化降低Cr (VI) 和吸附其他重金属方面非常有效.
- 由于其高效率和可重复使用性,AL-TiNTs在废水中去除重金属的实际应用中具有显著的潜力.
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