N-Doped Biochar as a New Metal-Free Activator of Peroxymonosulfate for Singlet Oxygen-Dominated Catalytic Degradation of Acid Orange 7

N-Doped Biochar as a New Metal-Free Activator of Peroxymonosulfate for Singlet Oxygen-Dominated Catalytic Degradation of Acid Orange 7

In this paper, using rice straw as a raw material and urea as a nitrogen precursor, a composite catalyst (a nitrogen-doped rice straw biochar at the pyrolysis temperature of 800 °C, recorded as NRSBC800) was synthesized by one-step pyrolysis. NRSBC800 was then characterized using XPS, BET, TEM and o...

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Main Authors: Ruirui Han, Yingsen Fang, Ping Sun, Kai Xie, Zhicai Zhai, Hongxia Liu, Hui Liu
Format: Article
Language:English
Published: MDPI AG 2021-09-01
Series:Nanomaterials
Subjects:
nitrogen-doped biochar
permonosulfate (PMS)
singlet oxygen
acid orange 7
Online Access:https://www.mdpi.com/2079-4991/11/9/2288
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spelling doaj-6c5b3c3b930c47eb992f0fc8d055a81e2021-09-26T00:48:33ZengMDPI AGNanomaterials2079-49912021-09-01112288228810.3390/nano11092288N-Doped Biochar as a New Metal-Free Activator of Peroxymonosulfate for Singlet Oxygen-Dominated Catalytic Degradation of Acid Orange 7Ruirui Han0Yingsen Fang1Ping Sun2Kai Xie3Zhicai Zhai4Hongxia Liu5Hui Liu6College of Advanced Materials and Engineering, Jiaxing Nanhu University, Jiaxing 314001, ChinaCollege of Biological, Chemical Sciences and Engineering, Jiaxing University, Jiaxing 314001, ChinaCollege of Biological, Chemical Sciences and Engineering, Jiaxing University, Jiaxing 314001, ChinaCollege of Biological, Chemical Sciences and Engineering, Jiaxing University, Jiaxing 314001, ChinaCollege of Biological, Chemical Sciences and Engineering, Jiaxing University, Jiaxing 314001, ChinaCollege of Advanced Materials and Engineering, Jiaxing Nanhu University, Jiaxing 314001, ChinaCollege of Biological, Chemical Sciences and Engineering, Jiaxing University, Jiaxing 314001, ChinaIn this paper, using rice straw as a raw material and urea as a nitrogen precursor, a composite catalyst (a nitrogen-doped rice straw biochar at the pyrolysis temperature of 800 °C, recorded as NRSBC800) was synthesized by one-step pyrolysis. NRSBC800 was then characterized using XPS, BET, TEM and other technologies, and its catalytic performance as an activator for permonosulfate (PMS) to degrade acid orange 7 (AO7) was studied. The results show that the introduction of N-doping significantly improved the catalytic performance of NRSBC800. The NRSBC800/PMS oxidation system could fully degrade AO7 within 30 min, with the reaction rate constant (2.1 × 10 <sup>−1</sup> min<sup>−1</sup>) being 38 times that of RSBC800 (5.5 × 10<sup>−3</sup> min<sup>−1</sup>). Moreover, NRSBC800 not only had better catalytic performance than traditional metal oxides (Co<sub>3</sub>O<sub>4</sub> and Fe<sub>3</sub>O<sub>4</sub>) and carbon nanomaterial (CNT) but also received less impact from environmental water factors (such as anions and humic acids) during the catalytic degradation process. In addition, a quenching test and electron paramagnetic resonance (EPR) research both indicated that AO7 degradation relied mainly on non-free radical oxidation (primarily singlet oxygen (<sup>1</sup>O<sub>2</sub>)). A recycling experiment further demonstrated NRSBC800’s high stability after recycling three times.https://www.mdpi.com/2079-4991/11/9/2288nitrogen-doped biocharpermonosulfate (PMS)singlet oxygenacid orange 7
collection DOAJ
language English
format Article
sources DOAJ
author Ruirui Han
Yingsen Fang
Ping Sun
Kai Xie
Zhicai Zhai
Hongxia Liu
Hui Liu
spellingShingle Ruirui Han
Yingsen Fang
Ping Sun
Kai Xie
Zhicai Zhai
Hongxia Liu
Hui Liu
N-Doped Biochar as a New Metal-Free Activator of Peroxymonosulfate for Singlet Oxygen-Dominated Catalytic Degradation of Acid Orange 7
Nanomaterials
nitrogen-doped biochar
permonosulfate (PMS)
singlet oxygen
acid orange 7
author_facet Ruirui Han
Yingsen Fang
Ping Sun
Kai Xie
Zhicai Zhai
Hongxia Liu
Hui Liu
author_sort Ruirui Han
title N-Doped Biochar as a New Metal-Free Activator of Peroxymonosulfate for Singlet Oxygen-Dominated Catalytic Degradation of Acid Orange 7
title_short N-Doped Biochar as a New Metal-Free Activator of Peroxymonosulfate for Singlet Oxygen-Dominated Catalytic Degradation of Acid Orange 7
title_full N-Doped Biochar as a New Metal-Free Activator of Peroxymonosulfate for Singlet Oxygen-Dominated Catalytic Degradation of Acid Orange 7
title_fullStr N-Doped Biochar as a New Metal-Free Activator of Peroxymonosulfate for Singlet Oxygen-Dominated Catalytic Degradation of Acid Orange 7
title_full_unstemmed N-Doped Biochar as a New Metal-Free Activator of Peroxymonosulfate for Singlet Oxygen-Dominated Catalytic Degradation of Acid Orange 7
title_sort n-doped biochar as a new metal-free activator of peroxymonosulfate for singlet oxygen-dominated catalytic degradation of acid orange 7
publisher MDPI AG
series Nanomaterials
issn 2079-4991
publishDate 2021-09-01
description In this paper, using rice straw as a raw material and urea as a nitrogen precursor, a composite catalyst (a nitrogen-doped rice straw biochar at the pyrolysis temperature of 800 °C, recorded as NRSBC800) was synthesized by one-step pyrolysis. NRSBC800 was then characterized using XPS, BET, TEM and other technologies, and its catalytic performance as an activator for permonosulfate (PMS) to degrade acid orange 7 (AO7) was studied. The results show that the introduction of N-doping significantly improved the catalytic performance of NRSBC800. The NRSBC800/PMS oxidation system could fully degrade AO7 within 30 min, with the reaction rate constant (2.1 × 10 <sup>−1</sup> min<sup>−1</sup>) being 38 times that of RSBC800 (5.5 × 10<sup>−3</sup> min<sup>−1</sup>). Moreover, NRSBC800 not only had better catalytic performance than traditional metal oxides (Co<sub>3</sub>O<sub>4</sub> and Fe<sub>3</sub>O<sub>4</sub>) and carbon nanomaterial (CNT) but also received less impact from environmental water factors (such as anions and humic acids) during the catalytic degradation process. In addition, a quenching test and electron paramagnetic resonance (EPR) research both indicated that AO7 degradation relied mainly on non-free radical oxidation (primarily singlet oxygen (<sup>1</sup>O<sub>2</sub>)). A recycling experiment further demonstrated NRSBC800’s high stability after recycling three times.
topic nitrogen-doped biochar
permonosulfate (PMS)
singlet oxygen
acid orange 7
url https://www.mdpi.com/2079-4991/11/9/2288
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AT yingsenfang ndopedbiocharasanewmetalfreeactivatorofperoxymonosulfateforsingletoxygendominatedcatalyticdegradationofacidorange7
AT pingsun ndopedbiocharasanewmetalfreeactivatorofperoxymonosulfateforsingletoxygendominatedcatalyticdegradationofacidorange7
AT kaixie ndopedbiocharasanewmetalfreeactivatorofperoxymonosulfateforsingletoxygendominatedcatalyticdegradationofacidorange7
AT zhicaizhai ndopedbiocharasanewmetalfreeactivatorofperoxymonosulfateforsingletoxygendominatedcatalyticdegradationofacidorange7
AT hongxialiu ndopedbiocharasanewmetalfreeactivatorofperoxymonosulfateforsingletoxygendominatedcatalyticdegradationofacidorange7
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