Preparation of recyclable MoO₃ nanosheets for visible-light driven photocatalytic reduction of Cr(vi)

Abstract

The exploitation of stable and earth-abundant photocatalysts with high catalytic activity remains a significant challenge for removing heavy metals from wastewater.

Synthesis of 2D MoO3−x/N-doped-carbon nanocomposites via in situ carbonization of layered (NH4)Mo3O9–(NH4)2Mo4O13-organic hybrid nanomaterials for exceptionally efficient adsorption and separation of organic dyes

“…4d). 24,36,50 The high-angle annular electron microscopy (HAADF-STEM) images and elemental mappings of nanobelts revealed the presence of Mo, O, C, and N (Fig. 5), assisting the formation of the MoO 31,44 The Mo 3d XPS spectra of both samples described above showed two peaks that can be fitted by three pairs of doublets (Fig.…”

“…[18][19][20][21][22][23][24][25][26][27][28] Compared to the activated carbon, TMO nanostructures exhibited comparable adsorption capacities and induced selectivity based on surface functionalization. α-MoO 3 as an important TMO, has been widely investigated and has presented a wide range of potential applications in the fields of electrochromism/photochromism devices, 29,30 SERS, 31 gas sensors, 32 field emission devices, 33 capacitors, 34 catalysts and photocatalysts, 35,36 H 2 generation, 37 and lithium-ion batteries, 38,39 etc. Recently, MoO 3 has also been studied as a critical dye adsorbent due to its high selectivity, good adsorption capacity, desirable mechanical strength, easy separation, and reusability.…”

New Electrospun ZnO:MoO3 Nanostructures: Preparation, Characterization and Photocatalytic Performance

“…Likewise, the same authors obtained an improvement of the photocatalytic activity after doping ZnO with Ni or Co [4]. Molybdenum trioxide (MoO 3 ) is a very interesting transition metal oxide having a wide band gap energy of about 3 eV, distinctive optical properties, and highly visible-light photocatalytic activity [5,6]. But the synthesis of ZnO-MoO 3 nanostructures (especially by the electrospinning method) and their detailed properties after being incorporated into the ZnO matrix are less reported compared to other semiconductor oxides, such as SnO 2 , ZnO, TiO 2 and In 2 O 3 [7,8].…”

“…The values obtained for the color CIE chromaticity coordinates for pure ZnO and all the hybrid composites are shown in Figure 9. Generally, the quality of any light emitted can be investigated in terms of correlated color temperature (CCT) which can be calculated using the McCamy's relation as [29]: CCT = 437n 3 + 3601n 2 + 6861n + 5517 (6) where, n = (x − xe)/(ye − y) is the inverse slope line and the point at xe = 0.332, ye = 0.186 is the epicenter. The values obtained for calculated CCT were found to be: 82,868 K, 11,389 K, 187,053 K, and 16,098 K, for S3, S5, S5, and S6 nanostructures, respectively.…”

Facile synthesis of ZnMoO4/AlPO4-5 nanorod composites as visible-light-driven photocatalysts and high-performance energy storage materials

“… 5 Although the positive attributes of photocatalysts, their applicability is limited due to the poor adsorption properties of semiconductors. Indeed, molybdenum trioxide (MoO 3 ), an n-type semiconductor, can be used in enhancement visible light photocatalytic properties of ZnO semiconductor, 6 where MoO 3 has good structural stability, less toxicity, and low cost. Semiconductor zinc molybdate, ZnMoO 4, among the various types of zinc-based materials, is a particularly significant inorganic material with a wide range of applications in catalysis, 7 electrochemical applications, 8,9 and photoluminescence 10 due to its superior optical and electrical properties and non-toxicity.…”