Efficient upcycling electroplating sludge and waste PET into Ni-MOF nanocrystals for the effective photoreduction of CO2,Environmental Science: Nano

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Efficient upcycling electroplating sludge and waste PET into Ni-MOF nanocrystals for the effective photoreduction of CO2
Environmental Science: Nano ( IF 5.8 ) Pub Date : 2020-12-22 , DOI: 10.1039/d0en01061h
Kainan Song _{1,

2,

3,

4} , Xiaoqing Qiu _{5,

6,

7,

8} , Bin Han _{1,

2,

3,

4} , Shujie Liang _{1,

2,

3,

4} , Zhang Lin _{1,

2,

3,

4,

9}

Affiliation

Upcycling the electroplating sludge (EPS) and PET waste into metal–organic-frameworks (MOFs) is beneficial for both pollution mitigation and sustainable economy. Herein, we report a green synthesis of Ni-MOF nanocrystals by simultaneously using EPS and PET waste as precursors without any precedent. In particular, when EPS was fully utilized, with numerous Fe³⁺/Cu²⁺ ions coexisting with Ni²⁺ ions, the desired Ni-MOFs could still be successfully fabricated. The Ni-MOF nanocatalysts exhibited an excellent activity towards the photoreduction of CO₂, giving 9.68 × 10³ μmol h⁻¹ g⁻¹ of CO with 96.7% selectivity over H₂ evolution. Additionally, the apparent quantum yield at 420 nm is 1.36%, which is superior to that of most catalysts in similar systems. This study clearly suggests that the MOF nanocrystals with excellent photocatalytic performances could be successfully fabricated from solid wastes.

中文翻译：

高效地将电镀污泥和废PET循环再生为Ni-MOF纳米晶体，以有效地将CO2光还原

将电镀污泥（EPS）和PET废料升级为金属有机框架（MOF）既有利于减轻污染，又有利于可持续经济。在这里，我们报道了同时使用EPS和PET废料作为前体的绿色合成Ni-MOF纳米晶体的先例。特别地，当EPS被充分利用时，大量的Fe ³⁺ / Cu ²⁺离子与Ni ²⁺离子共存时，仍可以成功地制备期望的Ni-MOF。在Ni-MOF纳米催化剂表现出朝向CO的光还原的优异的活性₂，得到9.68×10 ³微摩尔ħ ^-1克^-1与96.7％的选择性较H CO的₂演化。另外，在420nm的表观量子产率为1.36％，这优于相似系统中大多数催化剂的表观量子产率。这项研究清楚地表明，可以从固体废物中成功制备出具有优异光催化性能的MOF纳米晶体。

更新日期：2021-01-13

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