Preparation method and application of bimetallic MOF based on MOF-808
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A MOF-808, bimetallic technology, applied in chemical instruments and methods, other chemical processes, water/sludge/sewage treatment, etc., can solve the problems of poor reuse performance and low adsorption capacity, and achieve excellent repeatability, Improved adsorption capacity and good stability
Active Publication Date: 2020-10-30
NANCHANG HANGKONG UNIVERSITY
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[0004] The present invention aims to solve the technical problems of low adsorption capacity and poor reusability of existing adsorption materials for trivalent antimony and pentavalent antimony, and provides a preparation method and application of a bimetallic MOF based on MOF-808
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specific Embodiment approach 1
[0027] Specific implementation mode 1: This implementation mode is a method for preparing a bimetallic MOF based on MOF-808, which is specifically carried out according to the following steps:
[0028] One, the ZrOCl 2 ·8H 2 O and FeCl 3 Dissolve in DMF together, oscillate ultrasonically for 15min~20min, then add trimesic acid, continue ultrasonically oscillating for 10min~15min, then transfer to the reaction kettle, add formic acid, keep warm in an oven at 130℃~150℃ for 48h~50h, cool Suction filtration after reaching room temperature, retain the filter cake;
[0029] The ZrOCl 2 ·8H 2 O and FeCl 3 The molar ratio is 1:(0.1~4);
[0030] The FeCl 3 The volume ratio of the amount of substance to DMF is (0.8mmol~6.4mmol): 60mL;
[0031] The trimesic acid and FeCl 3 The molar ratio is 1:(0.25~1.5);
[0032] The volume of described DMF and formic acid is identical;
[0033] 2. ①Immerse the filter cake in DMF and then soak for 4h~6h, and then filter with suction; then imm...
specific Embodiment approach 2
[0038] Embodiment 2: This embodiment differs from Embodiment 1 in that: in step 1, heat preservation in an oven at 130° C. for 48 hours, and suction filtration after cooling to room temperature to retain the filter cake. Others are the same as the first embodiment.
specific Embodiment approach 3
[0039] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: ZrOCl described in step one 2 ·8H 2 O and FeCl 3 The molar ratio is 4:1. Others are the same as those in Embodiment 1 or 2.
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Abstract
The invention discloses a preparation method and application of a bimetallic MOF based on MOF-808, belongs to a preparation method of a bimetallic MOF and application of the bimetallic MOF to removalof trivalent antimonate radicals and pentavalent antimonate radicals in a water body. The invention aims to solve the technical problems of low trivalent antimony and pentavalent antimony adsorption capacity and poor reusability of the existing adsorption material. On the basis of MOF-808 synthesis conditions, iron ions in different proportions are added to form an adsorption material through in-situ doping, the adsorption material is applied to adsorb and remove trivalent antimonate radicals and pentavalent antimonate radicals in water, and the maximum adsorption capacity of the trivalent antimonate radicals and the pentavalent antimonate radicals are 310mg / g and 524mg / g respectively. The material has excellent repeatability, and after four adsorption experiments are repeated, the removalrate of trivalent antimonate radicals with an initial concentration of 100mg / L can still reach 90%, and the removal rate of pentavalent antimonate radicals with an initial concentration of 100mg / L can still reach 100%.
Description
technical field [0001] The invention belongs to a preparation method of bimetallic MOF and its application to removing trivalent antimonate and pentavalent antimonate in water. Background technique [0002] Heavy metal ions, as one of the common but diverse, complex and easily transferable serious pollution sources, are mainly caused by human factors such as mining, waste gas discharge, sewage irrigation and the use of products with heavy metals exceeding the standard. Due to human activities, the content of heavy metals in the environment increases, exceeding the normal range, directly endangering human health and deteriorating the quality of the environment. In order to solve this problem quickly and effectively, scientists in various fields are constantly expanding existing methods and seeking new and more efficient means of removal. Among the currently existing technical means, reverse osmosis, electrodeposition, precipitation / coagulation, membrane filtration, etc. are ...
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