Manganese oxide nanocomposite fabricated by a simple solid-state reaction and its ultraviolet photoresponse property

Abstract

We present a facile synthesis of manganese oxide (MnO(2)) nanocomposite with ultraviolet (UV) photosensitive characteristic by a solid-state reaction based on the reduction of potassium permanganate (KMnO(4)) by aniline, which provides a new family and more selectivity for UV photosensitive nanomaterials in the future.

Rational design of polyaniline/MnO2/carbon cloth ternary hybrids as electrodes for supercapacitors

“…The bands at 1635 and 1052 cm -1 of m-CC could be attributed to the N-H deformation and bending vibration of pyrrolic-N after nitrogen/oxygen plasma treatment 23 . The "electron-like peak " at 1142 cm -1 suggests the PANI in conducting state with H 2 SO 4 as the dopant 31 . The peaks at 1580 and 1479 cm -1 of PANI@MnO 2 @m-CC are slightly stronger than that of MnO 2 @PANI@m-CC, possibly due to PANI locating at the outermost layer.…”

Photocurrent Response of Surface‐Functionalized Metal Oxides with Well‐Matched Energy Levels: From Nothing to Something

“…[25] From this mechanism, we suggested the induction of UV photocurrent in semiconducting metal oxides, which have the ability to produce photogenerated electron-hole pairs but do not show photosensitive properties under light irradiation, by functionalizing their surfaces with a polymer that has a high UV or Vis absorption ability, and molecular energy states that match well with that of the semiconducting metal oxide. [29,33] UV and Vis photocurrent responses of Bi 2 O 3 and V 2 O 5 were realized for the first time, indicating that UV or Vis photocurrent responses of metal oxides can be induced from "nothing to something" by the functionalization of the metal oxides' surfaces with a polymer that has a high light absorption ability and well-matched energy levels to the metal oxide. [30][31][32] Although they both have a high UV absorption, no UV or Vis photocurrent responses have been found.…”

“…[29,33] UV and Vis photocurrent responses of Bi 2 O 3 and V 2 O 5 were realized for the first time, indicating that UV or Vis photocurrent responses of metal oxides can be induced from "nothing to something" by the functionalization of the metal oxides' surfaces with a polymer that has a high light absorption ability and well-matched energy levels to the metal oxide. [29,33] UV and Vis photocurrent responses of Bi 2 O 3 and V 2 O 5 were realized for the first time, indicating that UV or Vis photocurrent responses of metal oxides can be induced from "nothing to something" by the functionalization of the metal oxides' surfaces with a polymer that has a high light absorption ability and well-matched energy levels to the metal oxide.…”

“…[29] The UV-photosensitive appearance was attributed to the energy levels introduced by the polyaniline (PANI), lying in the corresponding band gap and in the conduction band of MnO 2 , which serves as a "hopping" state or bridge and increases the excitation probability of an electron into the conduction band. [29] The UV-photosensitive appearance was attributed to the energy levels introduced by the polyaniline (PANI), lying in the corresponding band gap and in the conduction band of MnO 2 , which serves as a "hopping" state or bridge and increases the excitation probability of an electron into the conduction band.…”

Green synthesis of nanosized manganese dioxide as positive electrode for lithium-ion batteries using lemon juice and citrus peel

“…KMnO 4 is one of the main starting materials for synthesis of α-MnO 2 as it is not only a suitable Mn source, but it can also stabilize the crystallographic structure of MnO 2 by the presence of K + cations located in the cavities [12]. Based on redox reactions between MnO 4 -and Mn +2 species, MnO 2 nanomaterials have been successfully prepared by several methods, such as sol-gel, solid state reaction, electrochemical deposition, refluxing, hydrothermal and solvothermal routes [13][14][15][16][17][18][19]. The effect of synthetic parameters (e.g.…”