Flower-, wire-, and sheet-like MnO2-deposited diatomites have been prepared using a hydrothermal method with Mn（Ac）2, KMnO4 and/or MnSO4 as Mn source and diatomite as support. Physical properties of the materials we...Flower-, wire-, and sheet-like MnO2-deposited diatomites have been prepared using a hydrothermal method with Mn（Ac）2, KMnO4 and/or MnSO4 as Mn source and diatomite as support. Physical properties of the materials were characterized by means of numerous analytical techniques, and their behaviors in the adsorption of chromium（VI） were evaluated. It is shown that the IvinO2-deposited diatomite samples with different morphologies possessed high surface areas and abundant surface hydroxyl groups （especially the wire-like MnO2/diatomite sample）. The wire-like MnO2/diatomite sample showed the best performance in the removal of Cr（VI）, giving the maximum Cr（VI） adsorption capacity of 101 mg/g.展开更多
We proposed a strategy to address the issue by synthesizing MnO with half-filled 3 d electron orbitals.That is,MnO nanocubes with an edge length of 61.82 nm were successfully prepared through electros-pinning and one-...We proposed a strategy to address the issue by synthesizing MnO with half-filled 3 d electron orbitals.That is,MnO nanocubes with an edge length of 61.82 nm were successfully prepared through electros-pinning and one-step pyrolysis as the cathode electrode for Li-O_(2)batteries.It is observed that the intermediate LiMnO_(4)rather than Li_(2)O_(2)is formed when LiO_(2)interactes with MnO(111)during the discharge process.It is precisely because of LiMnO_(4)that reduces its charge overpotential to 0.29 V.The novel reaction mechanism dominated by LiMnO_(4)further facilitates the lower charge overpotential,thereby enhancing the energy efficiency of the batteries.展开更多
基金financially supported by the Science and Technology Program of Jilin Province (Nos. 20130305015GX, 2014204037SF)the Beijing Natural Science Foundation (No. 2142008)the National Natural Science Foundation of China (No. 51225402)
文摘Flower-, wire-, and sheet-like MnO2-deposited diatomites have been prepared using a hydrothermal method with Mn（Ac）2, KMnO4 and/or MnSO4 as Mn source and diatomite as support. Physical properties of the materials were characterized by means of numerous analytical techniques, and their behaviors in the adsorption of chromium（VI） were evaluated. It is shown that the IvinO2-deposited diatomite samples with different morphologies possessed high surface areas and abundant surface hydroxyl groups （especially the wire-like MnO2/diatomite sample）. The wire-like MnO2/diatomite sample showed the best performance in the removal of Cr（VI）, giving the maximum Cr（VI） adsorption capacity of 101 mg/g.
基金Funded by the National Natural Science Foundation of China(No.22075035)the Technology Planning Project of Liaoning Province(No.2020JH2/10700008)the Dalian Science and Technology Innovation Fund Project(No.2022JJ11CG005)。
文摘We proposed a strategy to address the issue by synthesizing MnO with half-filled 3 d electron orbitals.That is,MnO nanocubes with an edge length of 61.82 nm were successfully prepared through electros-pinning and one-step pyrolysis as the cathode electrode for Li-O_(2)batteries.It is observed that the intermediate LiMnO_(4)rather than Li_(2)O_(2)is formed when LiO_(2)interactes with MnO(111)during the discharge process.It is precisely because of LiMnO_(4)that reduces its charge overpotential to 0.29 V.The novel reaction mechanism dominated by LiMnO_(4)further facilitates the lower charge overpotential,thereby enhancing the energy efficiency of the batteries.
