Understanding and application of an electroplating sludge-derived catalyst with an active texture for improved NO reduction

作者：Zhang, Chen; Song, Jia; Zhang, Jia; Zhang, Jingyi; Xing, Juanjuan; Hu, Dongli; Peng, Yongqiang; Zhou, Jizhi; Liu, Qiang; Gu, Hui; Qian, Guangren^*

来源：Science of the Total Environment, 2018, 631-632: 308-316.

DOI：10.1016/j.scitotenv.2018.02.290

• Active texture
• Multi metal
• Graphene oxide
• Nitric oxide
• Reduction

Industrial sludge has been shown to be a valuable source of transition metals and to be effective in NO reduction. This research has further revealed a characteristic texture (O-Me-C) that promotes effective NO reduction and supports its existence in a sludge-derived catalyst. HRTEM exhibited that the O-Me-C consisted of multimetal-oxide core, carbon shell and their binding interfaces. Furthermore, pre-treatment of the sludge with aromatic containing wastewater produced a more active texture (O-Me-GO(L)), characterized by the presence of multi-metal-oxide core, graphene oxide-like carbon and highly active interfaces (EELS, Mossbauer and Raman). As a result, the hybrid with O-Me-GO 1 exhibited enhanced activity and was able to remove >45% of NO (1000 ppm) at 200 degrees C and >99% at 400 degrees C over a much longer period (from 25 to 180 min) with an hourly gas space velocity of 14,400 h(-1) Besides, the hybrid showed excellent resistance to both SO2 and O-2. Therefore, the present work promoted the high value-added utilization of environment waste, and produced efficient catalyst in favor of sustainable development.

• 出版日期2018-8-1
• 单位上海大学