Multi-interface Mn3O4@ZnO/TiO2 with controllable charge transfer routes for highly selective denitrification under ultrasonic-assisted visible light photocatalysis

Li，Ning1; Li，Rui1; Zhao，Jianhui3; Liang，Lan1; Yu，Yang1; Kong，Lingchao4; Chen，Guanyi1,2; Yan，Beibei1

2020-08-15

10.1016/j.cej.2020.124997

CHEMICAL ENGINEERING JOURNAL   影响因子和分区

1385-8947

1873-3212

Interfacial effect played a critical role in catalytic reactions for environmental remediation. An innovative MnO@ZnO/TiO heterojunction with multi-interface structure was precisely-designed for the first time through alternate growth of ZnO and TiO nanolayers on MnO surface by atomic layer deposition. Further, the catalytic property of MnO@ZnO/TiO was evaluated through denitrification from water under ultrasonic-assisted visible light photocatalysis, which achieved 98.6% NO -N reduction and 98.8% N selectivity within 120 min. Besides, the MnO@ZnO/TiO exhibited stability and recyclability during the denitrification process. Mechanism insight revealed significant contributions of the novel multi-interface type II heterojunction. More charge transfer routes and possible reaction interfaces were provided for selective denitrification. Equally important, the synergy between visible light and ultrasound promoted the generation of active radicals. The radical trapping experiment proved the dominate role of e and CO in the denitrification process. Overall, the MnO@ZnO/TiO appeared to be a promising candidate to remediate aquatic contaminants in ultrasonic-assisted photocatalytic system. Also, this study highlighted an attractive approach for controllable fabrication of multi-interface heterojunctions.

Atomic layer deposition Mn3O4@ZnO/TiO2 Multi-interface Selective denitrification Ultrasonic-assisted photocatalysis

SCI ; EI

英语

其他

Shenzhen Science and Technology Program[KQTD20180413181724653] ; National Natural Science Foundation of China[51676138][51878557] ; National Key R&D Program of China[2016YFE0201800] ; Tianjin Science and Technology Project[18YFJLCG00090] ; Research Project of Tianjin Education Commission[2019KJ111]

Engineering

Engineering, Environmental ; Engineering, Chemical

WOS:000551901000051

ELSEVIER SCIENCE SA

20201608434721

Atomic layer deposition ; Photocatalysis ; Denitrification ; Manganese oxide ; Titanium dioxide ; II-VI semiconductors ; Light ; Heterojunctions ; Charge transfer

Semiconducting Materials:712.1 ; Semiconductor Devices and Integrated Circuits:714.2 ; Light/Optics:741.1 ; Chemical Reactions:802.2 ; Chemical Products Generally:804 ; Inorganic Compounds:804.2 ; Coating Techniques:813.1 ; Crystal Growth:933.1.2

ENGINEERING

2-s2.0-85083342352

Scopus

1.School of Environmental Science and Engineering/Tianjin Engineering Research Center of Bio Gas/Oil Technology,Tianjin University,Tianjin,300072,China
2.Preparation Office of Georgia,Tech Tianjin University Shenzhen Institute,Shenzhen,518071,China
3.School of Environmental and Municipal Engineering,Tianjin Chengjian University,Tianjin,300384,China
4.Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control,School of Environmental Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China

Li，Ning,Li，Rui,Zhao，Jianhui,et al. Multi-interface Mn3O4@ZnO/TiO2 with controllable charge transfer routes for highly selective denitrification under ultrasonic-assisted visible light photocatalysis[J]. CHEMICAL ENGINEERING JOURNAL,2020,394.

Li，Ning.,Li，Rui.,Zhao，Jianhui.,Liang，Lan.,Yu，Yang.,...&Yan，Beibei.(2020).Multi-interface Mn3O4@ZnO/TiO2 with controllable charge transfer routes for highly selective denitrification under ultrasonic-assisted visible light photocatalysis.CHEMICAL ENGINEERING JOURNAL,394.

Li，Ning,et al."Multi-interface Mn3O4@ZnO/TiO2 with controllable charge transfer routes for highly selective denitrification under ultrasonic-assisted visible light photocatalysis".CHEMICAL ENGINEERING JOURNAL 394(2020).