Microstructural, optical and ethanol sensing properties of sprayed Li-doped Mn 3 O 4 thin films

Controllable vapor phase fabrication of F:Mn3O4thin films functionalized with Ag and TiO2

“…21 Nevertheless, these works have concerned powdered systems, whereas modern nanofabrication frontiers require the preparation of Mn3O4 supported nanostructures/thin films with tailored properties, 8 for the ultimate development of various microsystems and devices. 43 To date, Mn3O4-based films have been obtained by galvanostatic processes, 8,15 _ENREF_6 chemical solution deposition, 1, 2, 16, 28 _ENREF_9 spray pyrolysis, 10,13,20,32 _ENREF_7 atomic layer deposition 6,43,44 _ENREF_3 and chemical vapor deposition (CVD). 7,11,45 In spite of these studies, no works have been so far devoted to the preparation of Mn3O4 films either doped/modified with F, or functionalized with Ag or TiO2.…”

“…Mn3O4, an earth-abundant and eco-friendly p-type semiconductor (EG = 2.5 eV) [1][2][3] _ENREF_1 with Mn(II) and Mn(III) centers occupying the tetrahedral and octahedral sites of the spinel structure, [3][4][5][6][7][8][9][10][11] _ENREF_1 is an attractive multi-functional oxide in view of numerous technological applications. [12][13][14] _ENREF_8 The latter encompass electrochromic materials, 15 antibacterial systems, 16 supercapacitors, 1, 2, 17 _ENREF_4 sensors/biosensors, 13,[18][19][20][21] and heterogeneous catalysts for a variety of reactions (oxidation of organic compounds, 16,[22][23][24][25] _ENREF_2 oxygen evolution reaction, 4,[26][27][28][29] _ENREF_3 ….). Other reports have concerned the use of Mn3O4 as photocatalyst, 20 especially in the purification of contaminated wastewaters, 30,31 thanks also to its appealing properties and Visible light harvesting, 27 enabling an efficient exploitation of solar radiation.…”

“…[12][13][14] _ENREF_8 The latter encompass electrochromic materials, 15 antibacterial systems, 16 supercapacitors, 1, 2, 17 _ENREF_4 sensors/biosensors, 13,[18][19][20][21] and heterogeneous catalysts for a variety of reactions (oxidation of organic compounds, 16,[22][23][24][25] _ENREF_2 oxygen evolution reaction, 4,[26][27][28][29] _ENREF_3 ….). Other reports have concerned the use of Mn3O4 as photocatalyst, 20 especially in the purification of contaminated wastewaters, 30,31 thanks also to its appealing properties and Visible light harvesting, 27 enabling an efficient exploitation of solar radiation. The functional performances of Mn3O4-based systems are directly dependent on their actual composition and morphological organization, 13,22,24,26 _ENREF_4 which, in turn, are significantly affected by the adopted processing conditions.…”

“…Additional degrees of freedom to control the properties of Mn3O4 nanosystems involve their chemical modification with suitable elements and functionalization with nanoparticles or thin surface layers. As concerns the former, various studies regarding the introduction of cationic dopants into Mn3O4, both for catalytic and gas sensing applications, 4,13,20,25,32 have been reported so far. Conversely, no examples regarding anionic doping, for instance with fluorine, are available in the literature up to date.…”

Enhancement of photocatalytic degradation of MB by recyclable Li/Mn3O4 thin films

“…Moreover, numerical simulation and experiments show that stochastic nonlinear dynamic characteristics and safe basin of Li-doped graphene are helpful for hydrogen storage field [17]. Moreover, previous works have demonstrated that addition of Li and Zr to Mn3O4 thin films leads to an enhanced response toward low ethanol concentration [18,19]. Mn3O4 has a large potential in heterogeneous catalysis, in particular advanced oxidation techniques of H2O2 and degradation of dyes [20][21][22].…”