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A novel Cu_(1.5)Mn_(1.5)O_(4)photothermal catalyst with boosted surface lattice oxygen activation for efficiently photothermal mineralization of toluene

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Nano Research 2023年第2期16卷 2133-2141页

作者： Qiang Cheng Zhuangzhuang Wang Xiaotian Wang Jiaming Li Yuan Li Gaoke Zhang Shenzhen Research Institute Hubei Key Laboratory of Mineral Resources Processing and EnvironmentState Key Laboratory of Silicate Materials for ArchitecturesWuhan University of TechnologyWuhan 430070China

Developing a novel photothermal catalyst for efficient mineralization of volatile organic compounds(VOCs)is of great significance to control air pollution.Herein,for the first-time,a spinel Cu_(1.5)Mn_(1.5)O_(4)nanomaterial with enhanced surface lattice oxygen activation was successfully obtained by a novel light-driven in situ reconstruction strategy from its precursor(CuMnO_(2))for efficient toluene mineralization.X-ray diffraction(XRD)and high-resolution transmission electron microscopy(HRTEM)analyses confirm that the CuMnO_(2)phase was converted into spinel Cu1.5Mn1.5O4 phase under full spectrum light irradiation.Ultraviolet–visible–near infrared ray(UV–vis–NIR)spectroscopy,X-ray photoelectron spectroscopy(XPS)analysis,and density functional theory(DFT)calculations determine that the strong near-infrared absorption ability and low dissociation energy of oxygen bond in Cu_(1.5)Mn_(1.5)O_(4)are beneficial to its surface lattice oxygen activation.Furthermore,O2-temperature programmed desorption(TPD)and in situ diffuse reflectance infrared transform spectroscopy(DRIFTS)further indicate that the surface lattice oxygen of the Cu_(1.5)Mn_(1.5)O_(4)is easily activated under light irradiation,which can promote ring opening of toluene.This research endows a new design of photothermal nanomaterial with enhanced lattice oxygen activation for deep oxidation of VOCs.

关键词： Cu_(1.5)Mn_(1.5)O_(4)nanomaterial surface lattice oxygen light-driven photothermal catalysis volatile organic compounds

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Preparation of cubic-tetragonal interface catalyst of CeO2-ZrO2 and its effect on catalytic diesel soot oxidation

Preparation of cubic-tetragonal interface catalyst of CeO2-Z...

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第十届全国催化剂制备科学与技术研讨会（成都）

作者：杨铮铮胡伟张纳黎云祥廖运文 China West Normal University

Rational design of catalyst interface is crucial for the improvement of catalytic performance. Herein, a cubic-tetragonal interface catalyst of CeO-ZrO solid solutions, CeO-ZrO(C-T), was synthesized by using a solvothermal method. The catalytic evaluation for soot oxidation on the prepared CeO-ZrO(C-T) interface catalyst was compared with the current commercial CeZrLaPrOx and CeO-ZrO soot oxidation catalysts;meanwhile, a systematic characterization was employed on the catalysts.

关键词： Soot combustion Exhaust purification interface catalyst surface lattice oxygen oxygen vacancy

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