将废弃的聚乙烯二甲 (PET) 瓶进行再循环,制成高性能活性炭,用于电化学淡化
Jhen-Cih Wu1, Jui-Yao Chang1, Xiangzhou Yuan2
1Graduate Institute of Environmental Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei, 10617, Taiwan.
Chemosphere
|August 7, 2024
概括
废塑料瓶被再循环转化为活性炭电极,用于电容性去离子化. 这种环保方法提供了高效的海水淡化,降低了能源消耗和塑料污染.
科学领域:
- 材料科学 材料科学 材料科学
- 环境科学 环境科学
- 电化学 电化学 电化学
背景情况:
- 废弃的聚乙烯四甲酸盐 (PET) 瓶子造成的塑料污染是一个重大的环境问题.
- 提升PET废物的循环利用为资源回收和污染减轻提供了一个可持续的战略.
- 活性炭 (AC) 是电化学海水淡化技术的关键电极材料,如电容脱离离子 (CDI).
研究的目的:
- 从废弃的PET瓶中制造增值活性炭 (AC) 电极,用于电容脱离离 (CDI).
- 研究KOH激活温度对PET衍生AC (PET-AC) 的特性和性能的影响.
- 评估PET-AC-1000作为CDI的电极材料的海水淡化效率,特定容量和周期稳定性.
主要方法:
- 废弃的PET瓶子通过KOH激活在700°C以上的温度下被加工成活性炭 (AC).
- 分析了物理化学特性,包括Brunauer-Emmet-Teller (BET) 特定表面积和孔隙结构.
- 在单通CDI系统中使用循环电压测量和静电电荷放电试验来评估电化学性能.
主要成果:
- 在1000°C激活的PET-AC-1000显示出高BET表面积 (1448 m2/g) 和有利的中孔结构.
- 该材料的高特异电容为108F/g,这表明它具有出色的电容离子储存能力.
- PET-AC-1000在CDI中实现了10.82 mg/g的最大电吸能力,能耗低 (0.07 kWh/mol) 和良好的循环稳定性.
结论:
- 将废弃PET瓶再循环转化为高性能交流电极是一种可行和可持续的方法.
- PET-AC-1000作为高效,经济高效的电化学海水淡化电极材料具有显著的前景.
- 这种方法与联合国可持续发展目标一致,通过解决塑料污染问题和促进获得清洁水的机会.
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