Synthesis of spinel CuCo2O4 nanoparticles and its application in p-nitrophenol reduction

Zhao, Shiduo; Li, Fang; Liang, Zhiwei

doi:10.1007/s10971-016-4200-3

Cited by 13 publications

(7 citation statements)

References 29 publications

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“…Figure (i) showed the fully scanned spectra of the two samples in the range of 0–800 eV, which revealed the presence of Pt, Au, Ti, O, Sn and C elements in the Fe@TiO 2 @Pt–Au sample and the Pt, Au, O, Sn, and C in the Fe@mSiO 2 @Pt–Au sample. These C elements should be ascribed to the adventitious carbon contaminant, and the binding energy for the C1s peak at 284.6 eV was used as the reference for calibration . Two Pt 4f signals of the Fe@mSiO 2 @Pt–Au nanocomposite were found at ~71.5 and ~74.7 eV, corresponding to the Pt 4f7/2 and Pt 4f5/2, respectively.…”

Section: Resultssupporting

confidence: 89%

“…These C elements should be ascribed to the adventitious carbon contaminant, and the binding energy for the C1s peak at 284.6 eV was used as the reference for calibration. 19 Two Pt 4f signals of the Fe@mSiO 2 @Pt-Au Article In Situ Formation of Pt-Au Nanoparticles on Magnetic Composites Carriers BULLETIN OF THE KOREAN CHEMICAL SOCIETY nanocomposite were found at~71.5 and~74.7 eV, corresponding to the Pt 4f7/2 and Pt 4f5/2, respectively. These signals are relatively higher than those for metallic Pt in the previous work, 13 possibly revealing the formation of Pt─Au alloy NPs, 20,21 which was in accordance with the HADDF-STEM analysis.…”

Section: Resultsmentioning

confidence: 94%

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In Situ Formation of Pt–Au Nanoparticles on Magnetic Composites Carriers: Tuning Catalytic Activity by Incorporation of Different Metal Oxides

Zhang

et al. 2017

Bulletin Korean Chem Soc

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Supported Pt─Au bimetal nanocatalysts have been prepared by an in situ reduction method followed by calcination in air and reduction in H 2 atmosphere. The catalysts exhibit a typical yolk-shell construction composed of a moveable magnetic Fe core and metal oxides shells decorated with Pt─Au nanoparticles. The structure of the bimetal nanocatalysts was characterized in detail by TEM, XRD, XPS, and N 2 physical adsorption and the catalytic activity of the nanocatalysts was studied by the catalytic reduction of 4-nitrophenol to 4-nitrophenol. It is found that the bimetal nanocatalysts composed with the different metallic oxides (TiO 2 and ZrO 2 ) exhibited the comparable Pt─Au particles size (~10 nm). However, the content of Pt─Au nanoparticles was varied with the metallic oxides support. Pt─Au nanoparticles deposited uniformly on TiO 2 with higher loadings, however the nanoparticles on ZrO 2 exhibited remarkably lower content, which should be attributed to the abundant hydroxyl on TiO 2 surface that served as the deposition site for Pt─Au nanoparticles. The result of the reduction reaction indicated that incorporation of TiO 2 in the bimetal Pt─Au nanocatalyst could significantly improve the catalytic activity as compared with ZrO 2 and m-SiO 2 . A possible mechanism was proposed to explain the synergistic effect in the supported Pt─Au bimetal nanocatalysts.

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Section: Resultssupporting

confidence: 89%

Section: Resultsmentioning

confidence: 94%

In Situ Formation of Pt–Au Nanoparticles on Magnetic Composites Carriers: Tuning Catalytic Activity by Incorporation of Different Metal Oxides

Zhang

et al. 2017

Bulletin Korean Chem Soc

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“…In this study, CuCo 2 O 4 nanoparticles were synthesized by sol-gel method (Zhao et al 2016b). First, 0.025 mol Co(NO 3 ) 2 •6H 2 O and 0.05 mol Cu(NO 3 ) 3 •3H 2 O were dissolved in 100 mL deionized water and mechanically stirred at 300 rpm for 10 min.…”

Section: Preparation Of Catalystmentioning

confidence: 99%

Activation of peroxymonosulfate by CuCo2O4 nano-particles towards long-lasting removal of atrazine

Yin

Yan

et al. 2021

Journal of Water Reuse and Desalination

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The effect of peroxymonosulfate (PMS) activated by nanocrystalline CuCo2O4 (NPS) on removal of atrazine (ATZ) was studied. First, the main experimental parameters were studied, including CuCo2O4 dose, PMS dose, initial pH value, and co-existing ion. The removal of ATZ (>99%) was attained under the optimal conditions (i.e., 150 mg/L CuCo2O4, 0.2 mM PMS, 5 mg/L ATZ, initial pH value of 6.8, and reaction time of 30 min). However, the removal of ATZ only reached 20.9% in the PMS alone system and there was no significant ATZ removal when adding CuCo2O4 alone into the solution, proving the good performance of the CuCo2O4/PMS system. Furthermore, reusability of CuCo2O4 was tested through five consecutive runs. To confirm which main active radicals were responsible in the system, two radical quenching experiments were carried out and electron paramagnetic resonance (EPR) was tested. In addition, the characterization of fresh and reacted CuCo2O4 NPs was tested by SEM, TEM, EDS, XRD, and XPS. Subsequently, based on the characterization of CuCo2O4 NPs and identification of radicals, ≡Cu2+/ ≡ Cu+ and ≡Co3+/ ≡ Co2+ were considered to be the main catalytic species, while the synergistic effect of Cu and Co played a crucial role. Finally, the degradation pathway of ATZ was proposed.

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“…The synthesis of 4-AP is of great importance and the global consumption is enormous and increases at a rate of 5% per year, as it is crucial in the pharmaceutical industry as an intermediate for the synthesis of analgesic and antipyretic drugs, such as paracetamol and acetaminophen 24,25 and it can be also used in diverse applications such as corrosion inhibitors, photographic developers and hairdyeing agent. 26 However, the importance of this reaction does not lie exclusively in the production of a valuable chemical, but also in the conversion of a toxic pollutant that affects the human health and environment and that is not easily biodegraded. 26,27 The morphology dependence of the 4-NP reduction was analysed by using spherical and cubic carbon-supported Pd nanocrystals of different sizes (spheres: 2.7, 3.9 and 5.5 nm; cubes: 7.6, 10.3 and 12.6 nm).…”

Section: Introductionmentioning

confidence: 99%

“…26 However, the importance of this reaction does not lie exclusively in the production of a valuable chemical, but also in the conversion of a toxic pollutant that affects the human health and environment and that is not easily biodegraded. 26,27 The morphology dependence of the 4-NP reduction was analysed by using spherical and cubic carbon-supported Pd nanocrystals of different sizes (spheres: 2.7, 3.9 and 5.5 nm; cubes: 7.6, 10.3 and 12.6 nm). To this end, the shaped nanocrystals were initially synthetised in colloidal form and subsequently deposited on the support by following a standard impregnation method.…”

Section: Introductionmentioning

confidence: 99%

Morphology-controlled Pd nanocrystals as catalysts in tandem dehydrogenation-hydrogenation reactions

et al. 2017

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A facile synthetic protocol was used to prepare morphology controlled Pd nanocrystals with spherical and cubic shapes of different sizes. Carbon-supported catalysts were prepared from the as-synthesised nanocrystals and their catalytic ability in a tandem dehydrogenation/hydrogenation reaction composed by the dehydrogenation of ammonia borane, serving as a hydrogen source, and the subsequent hydrogenation of 4nitrophenol (4-NP) to 4-aminophenol (4-AP) was assessed. The catalytic performance was strongly dependent on the nanocrystals morphology and the spherical nanoparticles with an average size of 5.5 nm displayed the best performance among investigated.

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Synthesis of spinel CuCo2O4 nanoparticles and its application in p-nitrophenol reduction

Cited by 13 publications

References 29 publications

In Situ Formation of Pt–Au Nanoparticles on Magnetic Composites Carriers: Tuning Catalytic Activity by Incorporation of Different Metal Oxides

In Situ Formation of Pt–Au Nanoparticles on Magnetic Composites Carriers: Tuning Catalytic Activity by Incorporation of Different Metal Oxides

Activation of peroxymonosulfate by CuCo2O4 nano-particles towards long-lasting removal of atrazine

Morphology-controlled Pd nanocrystals as catalysts in tandem dehydrogenation-hydrogenation reactions

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