Generalized synthesis of high surface area mesoporous metal titanates as efficient heterogeneous catalysts

Thalgaspitiya, Wimalika R.K.; Kapuge, Tharindu Kankanam; Rathnayake, Dinithi; He, Jian; Willis, William S.; Suib, Steven L.

doi:10.1016/j.apmt.2020.100570

Cited by 4 publications

(4 citation statements)

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“…[35][36][37] In this work, the BET surface area of the Fe incorporated samples were higher than the Cu incorporated ones, corresponding to study of Daroughegi et al, 2020 andThalgaspitiya et al, 2020. [38][39] The maximum surface area was at the Cu : Mn mole ratio of 0.15 and the Fe : Mn mole ratio of 0.20, causing them to merge into bigger clusters for higher mole ratios. [37][38][40][41] Scanning electron microscope (SEM) with elemental mapping SEM with elemental mapping (supplementary, Figure S1) was used for investigating the morphology and the elemental distribution of the pristine MnO 2, (0.10-0.25) CuMn x O y , and (0.10-0.25) FeMn x O y as shown in Figure 1.…”

Section: Bet Surface Area Analysissupporting

confidence: 68%

“…The presence of different phases resulted in different surface and pore sizes [35–37] . In this work, the BET surface area of the Fe incorporated samples were higher than the Cu incorporated ones, corresponding to study of Daroughegi et al ., 2020 and Thalgaspitiya et al ., 2020 [38–39] . The maximum surface area was at the Cu : Mn mole ratio of 0.15 and the Fe : Mn mole ratio of 0.20, causing them to merge into bigger clusters for higher mole ratios [37–38,40–41] …”

Section: Resultsmentioning

confidence: 99%

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Cu‐ and Fe‐Incorporated Manganese Oxides (Mn_xO_y) as Cathodic Catalysts for Hydrogen Peroxide Reduction (HPR) and Oxygen Reduction (OR) in Micro‐direct Methanol Fuel Cells

et al. 2022

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Improving manganese oxides as cathodic catalysts in direct methanol/hydrogen peroxide fuel cells by incorporation of Cu and Fe to promote oxygen reduction (OR) and hydrogen peroxide reduction (HPR) is reported. The Cu‐incorporated and Fe‐incorporated MnxOy were prepared by impregnation and solvothermal processes. From XRD, XPS, and XAS analyses, the obtained MnxOy consisted of MnO2 and mixed phases of Mn3O4 and Mn2O3 from impregnation and solvothermal methods, respectively. The Cu‐incorporated and Fe‐incorporated MnxOy included CuO and Fe2O3, respectively, through both methods. Addition of Cu and Fe decreased the BET surface area and increased the pore sizes as compared to the pristine MnO2. With the Fe : Mn molar ratio of 0.20 : 1, the Fe‐incorporated MnxOy from the solvothermal method presented the highest cathodic peaks under the cyclic voltammogram of HPR and OR at around 0.59 V of 11.59 mA cm−2 and −0.59 V of −12.33 mA cm−2, respectively. Compared to the Cu‐incorporated ones, the highest HPR peak at 0.68 V of 9.20 mA cm−2 and the highest OR peak at −0.59 V of −6.99 mA cm−2 were obtained from the Cu‐incorporated MnxOy prepared through the solvothermal method at the Cu : Mn molar ratio of 0.15 : 1. Incorporating Cu or Fe into MnO2 brought the improvement of electrocatalytic activity for HPR and OR. The Cu‐incorporated and Fe‐incorporated MnxOy from both methods showed a higher power density of μ‐DMFC than the pristine MnO2.

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Section: Bet Surface Area Analysissupporting

confidence: 68%

Section: Resultsmentioning

confidence: 99%

Cu‐ and Fe‐Incorporated Manganese Oxides (Mn_xO_y) as Cathodic Catalysts for Hydrogen Peroxide Reduction (HPR) and Oxygen Reduction (OR) in Micro‐direct Methanol Fuel Cells

et al. 2022

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“…Ever since the pioneering work by Frank et al [31] in photocatalytic oxidation of cyanide via TiO2, metal oxide semiconductors are frequently explored for photocatalysis. The unique chemical, optoelectronic, thermal properties as well as the stability of metal oxides makes them eminently potential and promising candidates for photocatalysis [32] .…”

Section: List Of Figuresmentioning

confidence: 99%

“…The unique chemical, optoelectronic, and thermal properties as well as the stability of metal oxides make them eminently potential and promising candidates for photocatalysis. 32 Additionally, the tunability of metal oxides provides an extra degree of freedom in the development and design of novel photocatalysts. Studies show that single-component and unmodified metal oxides such as ZnO and TiO 2 usually exhibit photoabsorption in the UV region due to their large band gaps.…”

Section: Xiaoming Zhangmentioning

confidence: 99%

Solution combustion synthesis: the relevant metrics for producing advanced and nanostructured photocatalysts

et al. 2022

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Carbonizing hollow metal–organic framework/layered double hydroxide (MOF/LDH) nanocomposite with excellent adsorption capacity for removal of Pb(II) and organic dyes from wastewater

Cai

Zhang

et al. 2023

Carbon Res.

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A novel sorbent ZIF-67/LDH@C was synthesised using mild etching and co-precipitation and carbonization calcination for the elimination of lead ions (Pb2+), malachite green (MG), and congo red (CR) from water. The three-dimensional hollow MOF structure and two-dimensional LDH nanosized layers of ZIF-67/LDH@C were demonstrated by scanning electron microscope (SEM), transmission electron microscopy (TEM), fourier transform infrared (FT-IR), X-ray diffraction (XRD), nitrogen adsorption/desorption, thermogravimetric analysis (TGA), and X-ray photoelectron spectroscopy (XPS) characterization. The maximal adsorption capability of Pb2+, MG, and CR could reach 662.25, 1729.83 and 526.32 mg∙g−1, respectively. The kinetic study proved that the adsorption was chemisorption or strong complexation and the rate-limiting step was intraparticle diffusion. The isotherms effectively indicated the monomolecular-type adsorption. Thermodynamic studies showed the spontaneous and endothermic nature of Pb2+, MG and CR adsorption onto ZIF-67/LDH@C. The adsorption mechanisms of ZIF-67/LDH@C may be attributed to electrostatic attraction, π-π interaction, hydrogen-bonding interaction, and surface complexation between ZIF-67/LDH@C and pollutants. Furthermore, favourable stability and negligible interference from other metal ions could promote the viability of the practical application of ZIF-67/LDH@C in wastewater purification. Graphical Abstract

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Generalized synthesis of high surface area mesoporous metal titanates as efficient heterogeneous catalysts

Cited by 4 publications

References 57 publications

Cu‐ and Fe‐Incorporated Manganese Oxides (Mn_xO_y) as Cathodic Catalysts for Hydrogen Peroxide Reduction (HPR) and Oxygen Reduction (OR) in Micro‐direct Methanol Fuel Cells

Cu‐ and Fe‐Incorporated Manganese Oxides (Mn_xO_y) as Cathodic Catalysts for Hydrogen Peroxide Reduction (HPR) and Oxygen Reduction (OR) in Micro‐direct Methanol Fuel Cells

Solution combustion synthesis: the relevant metrics for producing advanced and nanostructured photocatalysts

Carbonizing hollow metal–organic framework/layered double hydroxide (MOF/LDH) nanocomposite with excellent adsorption capacity for removal of Pb(II) and organic dyes from wastewater

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Generalized synthesis of high surface area mesoporous metal titanates as efficient heterogeneous catalysts

Cited by 4 publications

References 57 publications

Cu‐ and Fe‐Incorporated Manganese Oxides (MnxOy) as Cathodic Catalysts for Hydrogen Peroxide Reduction (HPR) and Oxygen Reduction (OR) in Micro‐direct Methanol Fuel Cells

Cu‐ and Fe‐Incorporated Manganese Oxides (MnxOy) as Cathodic Catalysts for Hydrogen Peroxide Reduction (HPR) and Oxygen Reduction (OR) in Micro‐direct Methanol Fuel Cells

Solution combustion synthesis: the relevant metrics for producing advanced and nanostructured photocatalysts

Carbonizing hollow metal–organic framework/layered double hydroxide (MOF/LDH) nanocomposite with excellent adsorption capacity for removal of Pb(II) and organic dyes from wastewater

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Product

Resources

About

Cu‐ and Fe‐Incorporated Manganese Oxides (Mn_xO_y) as Cathodic Catalysts for Hydrogen Peroxide Reduction (HPR) and Oxygen Reduction (OR) in Micro‐direct Methanol Fuel Cells

Cu‐ and Fe‐Incorporated Manganese Oxides (Mn_xO_y) as Cathodic Catalysts for Hydrogen Peroxide Reduction (HPR) and Oxygen Reduction (OR) in Micro‐direct Methanol Fuel Cells