Bacterial cellulose flakes loaded with Bi2MoO6 nanoparticles and quantum dots for the photodegradation of antibiotic and dye pollutants

Bismuth Molybdate Nanorods Derived from a Metal–Organic Framework for Triethylamine Gas Sensors

“…Altogether, these results demonstrate the successful synthesis from Bi-MOF of three different BMO semiconductors including α and γ homostructures as well as an αβγ heterostructure with a dominating β phase. In addition, HRTEM images of the three BMO materials exhibited surface flaws, including point defects and stacking faults, which are likely to be beneficial for gas sensing. , A previous study indicated that these surface defects are related to the collapse of the MOF structure during the synthesis process …”

“…31,52 A previous study indicated that these surface defects are related to the collapse of the MOF structure during the synthesis process. 29 TEA Sensing Performance of the MOF-Derived αβγ-BMO Nanorods. In the next experiment, the electrical resistance of MOF-derived α-Bi 2 Mo 3 O 12 , γ-Bi 2 MoO 6 , or αβγ-BMO sensors in the air was measured at operating temperatures from 300 to 420 °C (Figure 3a).…”

“…28 This synthesis method was shown to improve the performance of BMO nanoparticles for photocatalysis due to better charge separation mainly caused by the presence of intrinsic surface defects generated by the collapse of the MOF structure. 29 Surface defects are also beneficial for gas sensing by MOS because they optimize electronic properties, improve the adsorption of oxygen molecules and target gases, and modulate the formation and dissolution of the electron depletion layer, which impacts the sensor's electrical resistance. 30,31 BMO can exist in three different phases including α-Bi 2 Mo 3 O 12 , β-Bi 2 Mo 2 O 9, and γ-Bi 2 MoO 6 .…”

“…Because of these characteristics, it has been studied for a wide range of applications including as an acousto-optic nanomaterial, gas sensor, photoconductor, photocatalyst, adsorbent, ionic conductor, metabolite, and humidity sensor. − As a gas sensor, the α and γ phases of BMO have been developed to detect different VOC, but never specifically for TEA quantification. , This Aurivillius oxide is commonly synthesized by combining bismuth­(III) nitrate (BNO) with either ammonium heptamolybdate or sodium molybdate. , More recently, BMO has been derived from Bi-MOF instead of uncoordinated BNO . This synthesis method was shown to improve the performance of BMO nanoparticles for photocatalysis due to better charge separation mainly caused by the presence of intrinsic surface defects generated by the collapse of the MOF structure . Surface defects are also beneficial for gas sensing by MOS because they optimize electronic properties, improve the adsorption of oxygen molecules and target gases, and modulate the formation and dissolution of the electron depletion layer, which impacts the sensor’s electrical resistance. , …”

“…BMO can exist in three different phases including α-Bi 2 Mo 3 O 12 , β-Bi 2 Mo 2 O 9, and γ-Bi 2 MoO 6 . While α-Bi 2 Mo 3 O 12 and γ-Bi 2 MoO 6 are relatively easy to synthesize, pure β-Bi 2 Mo 2 O 9 is more difficult to obtain. ,− β-Bi 2 Mo 2 O 9 is a complex fluorite-like structure with poor stability. , Its synthesis is somewhat complicated because it will be stable at very high temperatures, but decomposed partially into α-Bi 2 Mo 3 O 12 and γ-Bi 2 MoO 6 at 400–550 °C. , For catalytic applications, it has been suggested that this feature of β-Bi 2 Mo 2 O 9 is advantageous since its synthesis often results in a heterojunction material with synergistic interactions between the different phases. , In the case of MOS sensors, heterostructures are also beneficial to improve gas detection performance. , For instance, heterojunctions provide more active sites for gas adsorption and shorten charge transport paths.…”