Layered CuNi-Cu2O/NiAlOx nanocatalyst for rapid conversion of p-nitrophenol to p-aminophenol
Layered CuNi-Cu2O/NiAlOx nanocatalyst for rapid conversion of p-nitrophenol to p-aminophenol
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层状 CuNi-Cu2O/NiAlOx 纳米催化剂用于对硝基苯酚快速转化为对氨基苯酚
DOI：
10.1007/s12274-021-3391-2
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发表时间：
2021-03-29
期刊：
影响因子：
9.9
通讯作者：
Ren, Panpan
中科院分区：
文献类型：
--
作者：
Fu, Lin;Zhou, Wei;Ren, Panpan
为了更好地排列活性中心和避免副产物的产生，合理的载体结构对高催化性能起着至关重要的作用，但仍然是一个挑战。在此，层状CuNi-Cu 2 O/NiAlOx纳米片已经通过水热合成，然后煅烧和H2还原处理过程构建。原位生成的CuNi纳米合金（NAs）和纳米Cu 2 O均匀分布在NiAlOx纳米片的两侧表面。基于纳米片的平面结构，催化活性CuNi NAs与光催化活性纳米Cu 2 O之间的协同作用使得CuNi-Cu 2 O/NiAlOx纳米片在32 s内催化对硝基苯酚（p-NP，14 mg·L-1）快速转化为对氨基苯酚（p-AP），反应速率常数k高达0.1779 s-1，即使循环超过27次也没有观察到明显的性能衰减。高浓度p-NP（10和20 g·L-1）分别在14和20 min内可被还原为p-AP。这种设计的纳米合金/双金属氧化物异质结构可以提供用于从硝基芳烃废水快速转化氨基芳烃的解决方案，即使在大的浓度范围内。
In order to well arrange active sites and avoid byproducts, the reasonable structured carrier nanocatalyst plays a crucial role in high catalytic performance, but still remains a challenge. Herein, the layered CuNi-Cu2O/NiAlOx nanosheets have been constructed through hydrothermal synthesis followed by calcination and H2 reduction treatment process. The in-situ formed CuNi nanoalloys (NAs) and nano-Cu2O were evenly distributed on the bilateral surface of layered NiAlOx nanosheets. Based on the planar structure of nanosheet, the synergy between catalytic active CuNi NAs and photocatalytic active nano-Cu2O endows CuNi-Cu2O/NiAlOx nanosheets with rapid conversion efficiency for catalyzing p-nitrophenol (p-NP, 14 mg·L−1) to p-aminophenol (p-AP) in 32 s with the reaction rate constant k up to 0.1779 s−1, and no obvious performance decay can be observed even over 27 cycles. Moreover, high concentration of p-NP at 10 and 20 g·L−1 could be reduced to p-AP within 14 and 20 min, respectively. Such designed nanoalloy/bimetal-oxide heterostructure can provide a solution for rapid conversion of aminoaromatics from nitroaromatics wastewater even at a large concentration range.