Selective Capture of Toxic Selenite Anions by Bismuth‐based Metal–Organic Frameworks

Abstract

Chemically durable and effective absorbent materials for selenite (SeO 3 2À )r emain highly desirable for contamination remediation. Now ab ismuth-based metal-organic framework (Bi-MOF,C AU-17) was used as adsorbent to capture SeO 3 2À anions from aqueous solution with ultrahigh adsorption capacity of 255.3 mg g À1 and fast kinetics.F urthermore,the adsorbent showed excellent selectivity for SeO 3 2À and was able to work steadily in abroad pH range of 4-11. Density functional theory (DFT) calculation, XANES modeling,a nd EXAFS fitting suggested that SeO 3 2À anions were immobilized by forming BiÀOÀSe bonds (T-3 structural model) though splitting the O À Bi À Ob ond in the crystal structure,l eading to astructural transformation of CAU-17 in the solid state.Supportinginformation and the ORCID identification number(s) for the author(s) of this article can be found under: https://doi.

Metal–organic frameworks for active food packaging. A review

“…Toxicity of the metal–organic frameworks due to metal ions and organic ligands functional groups (Ouyang et al 2018 ; Barea et al 2014 ; Sajid, 2016 ; Jung et al 2010 ).…”

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

“…The solvothermal synthesis of Bi-MOF (CAU-17) was completed as previously reported . In a typical procedure, 0.75 g of 1,3,5-benzenetricarboxylic acid was dispersed into 60 mL of methanol.…”

“…Bismuth molybdate (BMO) is a low-cost and low-toxicity bimetallic oxide with an adjustable morphology and good catalytic properties. 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 .…”

“…26,27 More recently, BMO has been derived from Bi-MOF instead of uncoordinated BNO. 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.…”

Synthesis and Characterization of Ru-MOFs on Microelectrode for Trace Mercury Detection

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