铈改性CuMn/Al<sub>2</sub>O<sub>3</sub>/堇青石整体催化剂的甲苯催化燃烧性能研究

DAI Yuhang; LI Kaige; ZHAO Jinxian; REN Jun; QUAN Yanhong

doi:10.1016/S1872-5813(23)60381-0

铈改性CuMn/Al₂O₃/堇青石整体催化剂的甲苯催化燃烧性能研究

doi: 10.1016/S1872-5813(23)60381-0

代宇航^{1, 2,},
李凯歌^{1, 2,},
赵金仙^{1, 2,},
任军^{1, 2, ,},
权燕红^{1, 2,}

1.
太原理工大学省部共建煤基能源清洁高效利用国家重点实验室, 山西太原 030024
2.
太原理工大学化学工程与技术学院, 山西太原 030024

详细信息

中图分类号: O643
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出版历程
- 收稿日期: 2023-05-04
- 修回日期: 2023-06-13
- 录用日期: 2023-06-16
- 网络出版日期: 2023-09-18

Catalytic combustion of toluene over cerium modified CuMn/Al₂O₃/cordierite monolithic catalyst

DAI Yuhang^{1, 2
,},
LI Kaige^{1, 2
,},
ZHAO Jinxian^{1, 2
,},
REN Jun^{1, 2
, ,},
QUAN Yanhong^{1, 2
,}

1.
State Key Laboratory of Clean and Efficient Coal Utilization, Taiyuan University of Technology, Taiyuan 030024, China
2.
College of Chemical Engineering and Technology, Taiyuan University of Technology, Taiyuan 030024, China

More Information

Corresponding author: E-mail: renjun@tyut.edu.cn

摘要

摘要: 本研究以堇青石为载体，采用超声浸渍法制备了一系列CuMnCe_x/Al₂O₃/堇青石整体式催化剂，同时，通过N₂吸附-脱附、XRD、SEM、EDX、H₂-TPR、O₂-TPD、XPS和EPR等方法对样品的物理、化学性质进行了系统的表征分析。实验结果表明，CuMnCe_x/Al₂O₃/堇青石整体式催化剂中Ce的含量明显影响甲苯催化燃烧性能。其中，CuMnCe₂/Al₂O₃/堇青石整体式催化剂对甲苯氧化具有最高活性，当甲苯浓度为1 g/L、空速为78000 mL/(g·h)、温度为263 °C时甲苯转化率达到90%，究其原因为CeO₂在CuMnO_x上分散均匀，不仅提高了氧空位的浓度和氧物种的迁移率，还增强了催化剂的低温还原性。同时，CuMnCe₂/Al₂O₃/堇青石整体式催化剂在长期评价和循环测试中呈现良好的稳定性。
- 甲苯 /
- 催化燃烧 /
- 整体式催化剂 /
- CuMnCe_x复合氧化物
Abstract: Catalytic combustion is an effective approach to remove volatile organic compounds, in which the development of highly active and durable catalyst is extremely crucial. Herein, a series of CuMnCe_x/Al₂O₃/cordierite monolithic catalysts were synthesized by using the ultrasonic-assisted impregnation method. The physicochemical properties were comprehensively characterized via the BET, XRD, SEM, EDX, H₂-TPR, O₂-TPD, XPS and EPR techniques. The results showed that the catalytic activity of CuMnCe_x/Al₂O₃/Cor for toluene combustion was strongly affected by the Ce content. The CuMnCe₂/Al₂O₃/Cor monolithic catalyst showed the best catalytic activity with toluene conversion of 90% at 263 °C under toluene concentration of 1 g/L and space velocity of 78000 mL/(g·h). Meanwhile, the well-dispersed CeO₂ in the CuMn matrix not only improved the content of oxygen vacancies and the mobility of oxygen species, but also enhanced the low-temperature reducibility of the catalyst. Moreover, the CuMnCe₂/Al₂O₃/Cor monolithic catalyst exhibited an excellent stability in the long-term test and cycle ability test.
- toluene /
- catalytic combustion /
- monolithic catalyst /
- CuMnCe_x composite oxide

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Figure 1 N₂ adsorption-desorption isotherms (a) and pore size distributions (b) of CuMnCe_x/Al₂O₃/Cor monolithic catalysts

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Figure 2 XRD patterns of CuMnCe_x powder (a) and CuMnCe_x/Al₂O₃/Cor (b)

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Figure 3 SEM images of CuMnCe_x/Al₂O₃/Cor monolithic catalysts

(a)-CuMn/Al₂O₃/Cor; (b)-CuMnCe_0.5/Al₂O₃/Cor; (c)-CuMnCe_0.8/Al₂O₃/Cor; (d)-CuMnCe₂/Al₂O₃/Cor; (e)-CuMnCe₃/Al₂O₃/Cor.

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Figure 4 EDX images of CuMnCe_x/Al₂O₃/Cor monolithic catalysts

(a)-CuMnCe_0.5/Al₂O₃/Cor; (b)-CuMnCe_0.8/Al₂O₃/Cor; (c)-CuMnCe₂/Al₂O₃/Cor; (d)-CuMnCe₃/Al₂O₃/Cor.

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Figure 5 H₂-TPR spectra of CuMnCe_x/Al₂O₃/Cor catalysts

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Figure 6 O₂-TPD spectra of CuMnCe_x/Al₂O₃/Cor catalysts

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Figure 7 XPS spectra of (a) Mn 2p_3/2, (b) Ce 3d, (c) Cu 2p_3/2 and (d) O 1s

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Figure 8 EPR results of CuMnCe_x catalysts

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Figure 9 Catalytic performance of CuMnCe_x/Al₂O₃/Cor (x=0, 0.5, 0.8, 2, 3) catalysts for toluene combustion

Reaction conditions: toluene concentration = 1 g/L, total flow rate = 130 mL/min, GHSV = 78000 mL/(g·h).

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Figure 10 Long-term evaluation (a) and recycling performance (b) of CuMnCe₂/Al₂O₃/Cor catalyst for toluene oxidation

Reaction conditions: toluene concentration = 1 g/L, temperature = 270 °C, total flow rate =130 mL/min, GHSV = 78000 mL/(g·h).

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Table 1 Structural properties, loading percentages and weight loss of monolithic catalyst

Sample	$S_{ {\rm{BET} } }^a$ /(m²·g⁻¹)	$v_{{\rm{total}}}^b $ /(cm³·g⁻¹)	d_p^c /nm	Loading^d w/%	Weight loss^e w/%
Cordierite	0.2	−	−	−	−
CuMn	11.5	0.0304	7.0	18.5	0.45
CuMnCe_0.5	9.4	0.0233	6.2	19.6	0.42
CuMnCe_0.8	12.4	0.0291	6.1	20.3	0.48
CuMnCe₂	17.8	0.0413	6.6	26.0	0.51
CuMnCe₃	10.8	0.0404	9.0	27.0	0.52
Note: ^a-Obtained by BET method; ^b-Estimated from the amount adsorbed at p/p₀=0.99; ^c-Calculated using the BJH method; ^d-Active component load rate; ^e-Weight loss rate of active component.

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Table 2 Surface elemental analysis of CuMn and CuMnCe_x monolithic catalysts

Sample	Mn⁴⁺/Mn	Ce³⁺/Ce	Cu⁺/Cu²⁺	O_sur/O_total
CuMn	0.25	−	0.11	0.36
CuMnCe_0.5	0.27	0.17	0.09	0.38
CuMnCe_0.8	0.31	0.18	0.09	0.44
CuMnCe₂	0.37	0.20	0.09	0.46
CuMnCe₃	0.32	0.14	0.10	0.43

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Table 3 Catalytic activity of several related catalysts for toluene combustion

Catalyst	Toluene concentration /(g·L⁻¹)	Catalyst amount /g	GHSV /(mL·g^–1·h^–1)	t₅₀ /°C	t₉₀ /°C	Ref.
CuMn/Al₂O₃/Cor	1	0.1	78000	286	300	this work
CuMnCe_0.5/Al₂O₃/Cor	1	0.1	78000	274	287	this work
CuMnCe_0.8/Al₂O₃/Cor	1	0.1	78000	267	282	this work
CuMnCe₂/Al₂O₃/Cor	1	0.1	78000	244	263	this work
CuMnCe₃/Al₂O₃/Cor	1	0.1	78000	262	284	this work
Cu-Co/Halloysite	0.6	0.2	60000	272	301	[58]
CeO₂/δ-MnO₂	1	0.2	15000	237	277	[59]
MnCe/ZrO₂	1	0.1	36000	257	290	[60]
MO_x/HZSM-5	1	0.4	15000	276	285	[61]
Cu-Mn-Ce/Al₂O₃	0.5	0.5	20000	315	340	[62]

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参考文献(63)

[1]	MCDONALD B C, DE GOUW J A, GILMAN J B, et al. Volatile chemical products emerging as largest petrochemical source of urban organic emissions[J]. Science,2018,359:760−764. doi: 10.1126/science.aaq0524
[2]	PENG Y, YANG Q, WANG L, et al. VOC emissions of coal-fired power plants in China based on life cycle assessment method[J]. Fuel,2021,292:120325. doi: 10.1016/j.fuel.2021.120325
[3]	SEKIGUCHI K, YASUI F, FUJII E. Capturing of gaseous and particulate pollutants into liquid phase by a water/oil column using microbubbles[J]. Chemosphere,2020,256:126996. doi: 10.1016/j.chemosphere.2020.126996
[4]	LI Z, JIN Y, CHEN T, et al. Trimethylchlorosilane modified activated carbon for the adsorption of VOCs at high humidity[J]. Sep Purif Technol,2021,272:118659. doi: 10.1016/j.seppur.2021.118659
[5]	YI S, WAN Y. Volatile organic compounds (VOCs) recovery from aqueous solutions via pervaporation with vinyltriethoxysilane-grafted-silicalite-1/polydimethylsiloxane mixed matrix membrane[J]. Chem Eng J,2017,313:1639−1646. doi: 10.1016/j.cej.2016.11.061
[6]	YAO X, ZHANG J, LIANG X, et al. Plasma-catalytic removal of toluene over the supported manganese oxides in DBD reactor: Effect of the structure of zeolites support[J]. Chemosphere,2018,208:922−930. doi: 10.1016/j.chemosphere.2018.06.064
[7]	LI Y, GUO Y, XUE B. Catalytic combustion of methane over M (Ni, Co, Cu) supported on ceria–magnesia[J]. Fuel Process Technol,2009,90:652−656. doi: 10.1016/j.fuproc.2008.12.002
[8]	HUANG H, XU Y, FENG Q, et al. Low temperature catalytic oxidation of volatile organic compounds: A review[J]. Catal Sci Technol,2015,5:2649−2669. doi: 10.1039/C4CY01733A
[9]	KAMAL M S, RAZZAK S A, HOSSAIN M M. Catalytic oxidation of volatile organic compounds (VOCs) – A review[J]. Atmos Environ,2016,140:117−134. doi: 10.1016/j.atmosenv.2016.05.031
[10]	WANG Z, YANG H, LIU R, et al. Probing toluene catalytic removal mechanism over supported Pt nano- and single-atom-catalyst[J]. J Hazard Mater,2020,392:122258. doi: 10.1016/j.jhazmat.2020.122258
[11]	ZHANG Z, ZHENG J, SHANGGUAN W. Low-temperature catalysis for VOCs removal in technology and application: A state-of-the-art review[J]. Catal Today,2016,264:270−278. doi: 10.1016/j.cattod.2015.10.040
[12]	KIM H S, KIM H J, KIM J H, et al. Noble-metal-based catalytic oxidation technology trends for volatile organic compound (VOC) removal[J]. Catalysts,2022,12:63. doi: 10.3390/catal12010063
[13]	WANG S, GU J, SHAN R, et al. Catalytic toluene steam reforming using Ni supported catalyst from pyrolytic peat[J]. Fuel Process Technol,2021,224:107032. doi: 10.1016/j.fuproc.2021.107032
[14]	LI K, LI T, DAI Y, et al. Highly active urchin-like MCo₂O₄ (M = Co, Cu, Ni or Zn) spinel for toluene catalytic combustion[J]. Fuel,2022,318:123648. doi: 10.1016/j.fuel.2022.123648
[15]	GUO Y, WEN M, SONG S, et al. Enhanced catalytic elimination of typical VOCs over ZnCoO_x catalyst derived from in situ pyrolysis of ZnCo bimetallic zeolitic imidazolate frameworks[J]. Appl Catal B: Environ,2022,308:121212. doi: 10.1016/j.apcatb.2022.121212
[16]	PIUMETTI M, FINO D, RUSSO N. Mesoporous manganese oxides prepared by solution combustion synthesis as catalysts for the total oxidation of VOCs[J]. Appl Catal B: Environ,2015,163:277−287. doi: 10.1016/j.apcatb.2014.08.012
[17]	ZHOU L, ZHANG B, LI Z, et al. Amorphous-microcrystal combined manganese oxides for efficiently catalytic combustion of VOCs[J]. Mol Catal,2020,489:110920. doi: 10.1016/j.mcat.2020.110920
[18]	CAI T, LIU Z, YUAN J, et al. The structural evolution of MnOx with calcination temperature and their catalytic performance for propane total oxidation[J]. Appl Surf Sci,2021,565:150596. doi: 10.1016/j.apsusc.2021.150596
[19]	CHEN G, CAI Y, ZHANG H, et al. Pt and Mo Co-Decorated MnO₂ nanorods with superior resistance to H₂O, sintering, and HCl for catalytic oxidation of chlorobenzene[J]. Environ Sci Technol,2021,55:14204−14214. doi: 10.1021/acs.est.1c05086
[20]	CHEN J, CHEN X, XU W, et al. Hydrolysis driving redox reaction to synthesize Mn-Fe binary oxides as highly active catalysts for the removal of toluene[J]. Chem Eng J,2017,330:281−293. doi: 10.1016/j.cej.2017.07.147
[21]	HU W, HUANG J, XU J, et al. Insights into the superior performance of mesoporous MOFs-derived Cu-Mn oxides for toluene total catalytic oxidation[J]. Fuel Process Technol,2022,236:107424. doi: 10.1016/j.fuproc.2022.107424
[22]	AGUILERA D A, PEREZ A, MOLINA R, et al. Cu-Mn and Co-Mn catalysts synthesized from hydrotalcites and their use in the oxidation of VOCs[J]. Appl Catal B: Environ,2011,104:144−150. doi: 10.1016/j.apcatb.2011.02.019
[23]	WANG L, SUN Y, ZHU Y, et al. Revealing the mechanism of high water resistant and excellent active of CuMn oxide catalyst derived from Bimetal-Organic framework for acetone catalytic oxidation[J]. J Colloid Interface Sci,2022,622:577−590. doi: 10.1016/j.jcis.2022.04.155
[24]	WANG Y, YANG D, LI S, et al. Layered copper manganese oxide for the efficient catalytic CO and VOCs oxidation[J]. Chem Eng J,2019,357:258−268. doi: 10.1016/j.cej.2018.09.156
[25]	LU J, ASAHINA S, TAKAMI S, et al. Interconnected 3D framework of CeO₂ with high oxygen storage capacity: High-Resolution scanning electron microscopic observation[J]. ACS Appl Nano Mater,2020,3:2346−2353. doi: 10.1021/acsanm.9b02446
[26]	XIAO Y, LI H, XIE K. Activating lattice oxygen at the twisted surface in a mesoporous CeO₂ single crystal for efficient and durable catalytic CO oxidation[J]. Angew Chem Int Ed,2021,60:5240−5244. doi: 10.1002/anie.202013633
[27]	WANG C, ZHANG C, HUA W, et al. Catalytic oxidation of vinyl chloride emissions over Co-Ce composite oxide catalysts. Chem Eng J, 2017, 315: 392-402.
[28]	WANG Y, XUE R, ZHAO C, et al. Effects of Ce in the catalytic combustion of toluene on Cu_xCe_1−xFe₂O₄[J]. Colloid Surface A,2018,540:90−97. doi: 10.1016/j.colsurfa.2017.12.067
[29]	MIAO C, LIU J, ZHAO J, et al. Catalytic combustion of toluene over CeO₂-CoO_x composite aerogels[J]. New J Chem,2020,44:11557−11565. doi: 10.1039/D0NJ00091D
[30]	GÓMEZ D M, GATICA J M, HERNÁNDEZ-GARRIDO J C, et al. A novel CoO_x/La-modiﬁed-CeO₂ formulation for powdered and washcoated onto cordierite honeycomb catalysts with application in VOCs oxidation[J]. Appl Catal B: Environ,2014,144:425−434. doi: 10.1016/j.apcatb.2013.07.045
[31]	MA M, YANG R, JIANG Z, et al. Fabricating M/Al₂O₃/cordierite (M = Cr, Mn, Fe, Co, Ni and Cu) monolithic catalysts for ethyl acetate efficient oxidation: Unveiling the role of water vapor and reaction mechanism[J]. Fuel,2021,303:121244. doi: 10.1016/j.fuel.2021.121244
[32]	HEIBEL A K, SORENSEN C M. Monolithic catalysts for the chemical industry[J]. Ind Eng Chem Res,2004,43:4602−4611. doi: 10.1021/ie030730q
[33]	ZHAO H, WANG H, QU Z. Synergistic effects in Mn-Co mixed oxide supported on cordierite honeycomb for catalytic deep oxidation of VOCs[J]. J Environ Sci,2022,112:231−243. doi: 10.1016/j.jes.2021.05.003
[34]	XIONG J, LUO Z, YANG J, et al. Robust and well-controlled TiO₂-Al₂O₃ binary nanoarray-integrated ceramic honeycomb for efficient propane combustion[J]. CrystEngComm,2019,21:2727−2735. doi: 10.1039/C8CE02012D
[35]	ZHOU H, GE M, WU S, et al. Iron based monolithic catalysts supported on Al₂O₃, SiO₂, and TiO₂: A comparison for NO reduction with propane[J]. Fuel,2018,220:330−338. doi: 10.1016/j.fuel.2018.01.077
[36]	TIAN F, LI K, SU Y. Catalytic performance and characterization of Ce-Modified Fe catalysts supported on Al₂O₃ for SCR-C₃H₈[J]. Catal Surv Asia,2020,24:239−249. doi: 10.1007/s10563-020-09306-4
[37]	LU H, ZHOU Y, HUANG H, et al. In-situ synthesis of monolithic Cu-Mn-Ce/cordierite catalysts towards VOCs combustion[J]. J Rare Earth,2011,29(9):855−860. doi: 10.1016/S1002-0721(10)60555-8
[38]	BEHAR S, GONZALEZ P, AGULHON P, et al. New synthesis of nanosized Cu-Mn spinels as efﬁcient oxidation catalysts[J]. Catal Today,2012,189:35−41. doi: 10.1016/j.cattod.2012.04.004
[39]	LIU P, WEI G, LIANG X, et al. Synergetic effect of Cu and Mn oxides supported on palygorskite for the catalytic oxidation of formaldehyde: Dispersion, microstructure, and catalytic performance[J]. Appl Clay Sci,2018,161:265−273. doi: 10.1016/j.clay.2018.04.032
[40]	XIAO R, QIN R, ZHANG C, et al. Catalytic decomposition of ethyl acetate over La-modiﬁed Cu-Mn oxide supported on honeycomb ceramic[J]. J Rare Earth,2021,39:817−825. doi: 10.1016/j.jre.2020.10.015
[41]	SUMRUNRONNASAK S, CHANLEK N, PIMPHA N. Improved CeCuO_x catalysts for toluene oxidation prepared by aqueous cationic surfactant precipitation method[J]. Mater Chem Phys,2018,216:143−152.
[42]	DÍAZ C C, YESTE M P, VIDAL H, et al. In situ generation of Mn1-xCex system on cordierite monolithic supports for combustion of n-hexane. Effects on activity and stability[J]. Fuel,2020,262:116564. doi: 10.1016/j.fuel.2019.116564
[43]	FENG J, HOU Z Y, ZHOU X Y, et al. Low-temperature catalytic oxidation of toluene over Mn-Co-O/Ce_0.65Zr_0.35O₂ mixed oxide catalysts[J]. Chem Pap,2018,72:161−173. doi: 10.1007/s11696-017-0267-8
[44]	DENG L, HUANG C, KAN J, et al. Effect of coating modiﬁcation of cordierite carrier on catalytic performance of supported NiMnO₃ catalysts for VOCs combustion[J]. J Rare Earth,2018,36:265−272. doi: 10.1016/j.jre.2017.07.015
[45]	LIU G, YUE R, JIA Y, et al. Catalytic oxidation of benzene over Ce-Mn oxides synthesized by ﬂame spray pyrolysis[J]. Particuology,2013,11:454−459. doi: 10.1016/j.partic.2012.09.013
[46]	LUO Y, ZHENG Y, ZUO J, et al. Insights into the high performance of Mn-Co oxides derived from metalorganic frameworks for total toluene oxidation[J]. J Hanzard Mater,2018,349:119−127. doi: 10.1016/j.jhazmat.2018.01.053
[47]	WANG T, SUN Y, ZHOU Y, et al. Identifying inﬂuential parameters of octahedrally coordinated cations in spinel ZnMn_xCo_2−xO₄ oxides for the oxidation reaction[J]. ACS Catal,2018,8:8568−8577. doi: 10.1021/acscatal.8b02376
[48]	LI S, MO S, WANG D, et al. Synergistic effect for promoted benzene oxidation over monolithic CoMnAlO catalysts derived from in situ supported LDH ﬁlm[J]. Catal Today,2019,332:132−138. doi: 10.1016/j.cattod.2018.08.014
[49]	CUO Z, WANG D, GONG Y, et al. A novel porous ceramic membrane supported monolithic Cu-doped Mn–Ce catalysts for benzene combustion[J]. Catalysts,2019,9:652. doi: 10.3390/catal9080652
[50]	LI W, LIU H, MA X, et al. Fabrication of silica supported Mn-Ce benzene oxidation catalyst by a simple and environment-friendly oxalate approach[J]. J Porous Mater,2018,25:107−117. doi: 10.1007/s10934-017-0424-z
[51]	ZUO S, YANG P, WANG X. Efficient and environmentally friendly synthesis of AlFe-PILC-Supported MnCe catalysts for benzene combustion[J]. ACS Omega,2017,2:5179−5186. doi: 10.1021/acsomega.7b00592
[52]	CUO Z, DENG Y, LI W, et al. Monolithic Mn/Ce-based catalyst of ﬁbrous ceramic membrane for complete oxidation of benzene[J]. Appl Surf Sci,2018,456:594−601. doi: 10.1016/j.apsusc.2018.06.207
[53]	CHEN J, CHEN X, YAN D, et al. A facile strategy of enhancing interaction between cerium and manganese oxides for catalytic removal of gaseous organic contaminants[J]. Appl Catal B: Environ,2019,250:396−407. doi: 10.1016/j.apcatb.2019.03.042
[54]	ZANG M, ZHAO C, WANG Y, et al. Ceramic-monolith-supported La_0.8Ce_0.2MnO₃ catalysts for toluene oxidation[J]. Mater Lett,2019,253:196−200. doi: 10.1016/j.matlet.2019.05.135
[55]	ZANG M, ZHAO C, WANG Y, et al. Low temperature catalytic combustion of toluene over three-dimensionally ordered La_0.8Ce_0.2MnO₃/cordierite catalysts[J]. Appl Surf Sci,2019,483:355−362. doi: 10.1016/j.apsusc.2019.03.320
[56]	WANG S, LI T, CHENG X, et al. Regulating the concentration of dissolved oxygen to achieve the directional transformation of reactive oxygen species: A controllable oxidation process for ciprofloxacin degradation by calcined CuCoFe-LHD[J]. Water Res,2023,233:119744. doi: 10.1016/j.watres.2023.119744
[57]	WANG S, ZHU J, LI T, et al. Oxygen vacancy-mediated CuCoFe/tartrate-LHD catalyst directly activates oxygen to produce superoxide radicals: Transformation of active species and implication for nitrobenzene degradation[J]. Environ Sci Technol,2022,56:7924−47934. doi: 10.1021/acs.est.2c00522
[58]	CARRILLO A M, CARRIAZO J G. Cu and Co oxides supported on halloysite for the total oxidation of toluene[J]. Appl Catal B: Environ,2015,164:443−452. doi: 10.1016/j.apcatb.2014.09.027
[59]	LI L, JING F, YAN J, et al. Highly effective self-propagating synthesis of CeO₂-doped MnO₂ catalysts for toluene catalytic combustion[J]. Catal Today,2017,297:167−172. doi: 10.1016/j.cattod.2017.04.053
[60]	LI L, SONG L, FEI Z, et al. Effect of different supports on activity of Mn-Ce binary oxides catalysts for toluene combustion[J]. J Rare Earth,2020,40:645−651.
[61]	HUANG H, ZHANG C, WANG L, et al. Promotional effect of HZSM-5 on the catalytic oxidation of toluene over MnOx/HZSM-5 catalysts[J]. Catal Sci Technol,2016,6:4260−4270. doi: 10.1039/C5CY02011E
[62]	HUANG H, LING W, JIN L, et al. Support effect on catalytic activity of VOCs combustion over supported Cu-Mn-Ce catalysts[J]. J Rare Earths,2012,30(3):295−300.
[63]	LIU X, ZHOU K, WANG L, et al. Oxygen vacancy clusters promoting reducibility and activity of ceria nanorods[J]. J Am Chem Soc,2009,131:3140−3141. doi: 10.1021/ja808433d