Results 131 to 140 of about 521,898 (197)

Mn-O Covalency Governs the Intrinsic Activity of Co-Mn Spinel Oxides for Boosted Peroxymonosulfate Activation.

Angewandte Chemie, 2020
Transition metal (TM)-based bimetallic spinel oxides can efficiently activate peroxymonosulfate (PMS) presumably attributed to enhanced electron transfer between TMs, but the existing model cannot fully explain the efficient TM redox cycling.
Zhi-Yan Guo, Chen-Xuan Li, Miao Gao, Xiao Han, Ying-Jie Zhang, Wen-Jun Zhang, Wenwei Li   +6 more
semanticscholar   +1 more source

Enhanced peroxymonosulfate activation via complexed Mn(II): A novel non-radical oxidation mechanism involving manganese intermediates.

Water Research, 2021
In recent years, the activation of persulfates (peroxydisulfate (PDS) and peroxymonosulfate (PMS)) via transition metal ions for contaminants degradation has received extensive attention in water treatment.
Yuan Gao, Yang Zhou, Su-yan Pang, Jin Jiang, Yongming Shen, Yang Song, Jie-bin Duan, Qin Guo   +7 more
semanticscholar   +1 more source

Superoxide radical mediated Mn(III) formation is the key process in the activation of peroxymonosulfate (PMS) by Mn-incorporated bacterial-derived biochar.

Journal of Hazardous Materials, 2022
Biochar was used as a heterogeneous activator for peroxymonosulfate (PMS), and the activation performance strongly depended on the structure, functional groups, and modification of the biochar.
Bixia Gao, Simeng Zhu, Jialiang Gu, Yang Liu, Xianliang Yi, Hao Zhou   +5 more
semanticscholar   +1 more source

Dual redox cycles of Mn(Ⅱ)/Mn(III) and Mn(III)/Mn(IV) on porous Mn/N co-doped biochar surfaces for promoting peroxymonosulfate activation and ciprofloxacin degradation.

Journal of Colloid and Interface Science, 2022
Mn and N co-doped biochar (Mn-N-TS) was prepared as an effective catalyst to activate peroxymonosulfate (PMS) for ciprofloxacin (CIP) degradation. As opposed to Mn-TS and N-TS, Mn-N-TS had more active sites containing N and Mn, as well as a greater ...
Zhifeng Liu, Miao He, Linagliang Tang, Binbin Shao, Qinghua Liang, Ting Wu, Yuan Pan, Xiansheng Zhang, Songhao Luo, Qingyun He, Lin Ge   +10 more
semanticscholar   +1 more source

Electronic and magnetic properties of Mn/Cu/Mn and Mn/Ni/Mn slabs

Surface Science, 1995
In this paper we are interested in the magnetic properties of Mn/Cu/Mn and Mn/Ni/Mn slabs as a function of Mn coverage at T = 0 K. A tight-binding parametrized Hamiltonian with s, p and d orbitals is used and the appearance of spillover is accounted for by enlarging the local basis at the surface and vacancy sites.
G. Fabricius, A.M. Llois, M. Weissmann, M.A. Khan, H. Dreyssé   +4 more
openaire   +1 more source

Depth dependence of the Mn valence and Mn-Mn coupling in (Ga,Mn)N

Physical Review B, 2007
We report an x-ray absorption and x-ray magnetic circular dichroism study of the dilute magnetic semiconductor (Ga,Mn)N. Two distinct components are observed in the Mn ${L}_{2,3}$ spectra, with a ratio that depends on sample properties. From comparisons of measurements obtained with different detection modes and under different magnetic fields, we ...
A. A. Freeman, K. W. Edmonds, N. R. S. Farley, S. V. Novikov, R. P. Campion, C. T. Foxon, B. L. Gallagher, E. Sarigiannidou, G. van der Laan   +8 more
openaire   +1 more source

Suppressing the Jahn–Teller Effect in Mn‐Based Layered Oxide Cathode toward Long‐Life Potassium‐Ion Batteries

Advanced Functional Materials, 2021
Mn‐based layered oxides are one of the most appealing cathodes for potassium‐ion batteries (PIBs) because of their high theoretical capacity. However, the Jahn–Teller effect of Mn3+ induces detrimental structural disorder and irreversible phase ...
Zhitong Xiao, Fanjie Xia, Lin Xu, Xuanpeng Wang, Jiashen Meng, Hong Wang, Xiao Zhang, Lishan Geng, Jinsong Wu, Liqiang Mai   +9 more
semanticscholar   +1 more source

Structure and magnetism of a Mn(iii)–Mn(ii)–Mn(ii)–Mn(iii) chain complex

Dalton Transactions, 2013
A novel tetranuclear manganese(II/III) complex with anions of pyridine-2,6-dicarboxylic acid (dipicolinic acid) has been synthesised and magneto-structurally characterised. The crystal structure of [Mn(II)2Mn(III)2(dipic)6(H2O)4]·2CH3OH·4H2O has been determined by single-crystal X-ray diffraction.
Róbert, Uhrecký, Ján, Moncoľ, Marian, Koman, Ján, Titiš, Roman, Boča   +4 more
openaire   +2 more sources

3D network Mn-glutarate compound with Mn–O–Mn and Mn–O–C–O–Mn connectivity

Inorganic Chemistry Communications, 2004
Abstract The reaction of MnCl2 and glutaric acid in aqueous solution affords a new 3D Mn-glutarate with an empirical formula of Mn3(H2O)[CO2(CH2)3CO2]3 (1). The structure of 1 contains honeycomb-type 12 membered Mn–O–Mn networks of MnO6 octahedra and interconnecting Mn–O–C–O–Mn bridging resulting in magnetic interaction below 3 K.
YooJin Kim, YunJu Park, Duk-Young Jung
openaire   +1 more source

Clustering of Mn in (Ga,Mn)As

Journal of Magnetism and Magnetic Materials, 2005
Clustering of (Ga,Mn)As is studied with the supercell density-functional calculations using the projector augmented-wave method. We find large binding energies for a single substitutional Mn atom to existing dimers and trimers giving rise to trimer and tetramer formation. For larger clusters this binding energy drops.
H. Raebiger, A. Ayuela, J. von Boehm, R.M. Nieminen   +3 more
openaire   +1 more source