In 1879, scientist Boisbaudler discovered a new rare earth element in the "praseodymium neodymium" obtained from niobium yttrium ore, and named it samarium according to the name of this ore.
Samarium is light yellow and is the raw material of samarium-cobalt permanent magnets. Samarium-cobalt magnets are the first rare-earth magnets to be industrially applied. There are two types of such permanent magnets: SmCo5 series and Sm2Co17 series. The SmCo5 series and the Sm2Co17 series were invented in the early and late 1970s. The purity of samarium oxide used in samarium cobalt magnets does not need to be too high. From a cost perspective, about 95% of the products are mainly used. In addition, samarium oxide powder is also used in ceramic capacitors and catalysts. In addition, samarium has nuclear properties and can be used as structural materials, shielding materials, and control materials for nuclear reactors, enabling the huge energy generated by nuclear fission to be used safely.
One-step method for preparing steel sulfide/samarium oxyhydroxide composite photocatalyst
The invention discloses a one-step method for preparing an indium sulfide/samarium oxyhydroxide composite photocatalyst. First, In(NO3)3·4.5H20 is dissolved in deionized water to form a solution, and then the element molar ratio nIn:ns=1: 3 Weigh the thioacetamide into the above solution and stir to obtain the mixed solution A: Next weigh Sm(NO3)·3.6H20, add to the mixed solution A according to the molar ratio nIn:nsm=1:(0.4~0.7), Stir to the mixed solution B; finally, the mixed solution B is subjected to homogeneous hydrothermal reaction. After the reaction is completed, the product is taken out, centrifugally washed several times with deionized water and absolute ethanol, and then dried to obtain the In2S7/SmOOH composite photocatalyst . The method of the invention is uniformly heated and easy to control. The resulting product does not have other miscellaneous phases, the utilization rate is high, the raw material cost used is low, and the target product is easy to obtain, which effectively improves the photocatalytic activity and stability and can be used to degrade pollution in organic wastewater To alleviate environmental pollution.
1. A one-step method for preparing indium sulfide/samarium oxyhydroxide composite photocatalyst, characterized in that it includes the following steps;
Step 1: Dissolve In(NO3)3·4.5H20 in deionized water to form a solution, then weigh thioacetamide into the above solution according to the element molar ratio nIn:ns=1:3, and stir to obtain mixed solution A;
Step 2: Weigh Sm(NO3)3·6H20, add to the mixed solution A according to the molar ratio nIn:nsm=1:(0.4~0.7), and stir to obtain the mixed solution B:
Step 3: The mixed solution B was subjected to a homogeneous hydrothermal reaction. After the reaction was completed, the product was taken out, centrifugally washed with deionized water and absolute ethanol several times, and then dried to obtain the In2S3/SmOOH composite photocatalyst.
2. A one-step method for preparing an indium sulfide/samarium oxyhydroxide composite photocatalyst according to claim 1, characterized in that in step 1, 1.145gIn(NO3)3·4.5H20 is added per 30mL of deionized water.
3. A one-step method for preparing an indium sulfide/samarium oxyhydroxide composite photocatalyst according to claim 1, characterized in that the stirring time in step 2 and step 3 are both 60 min.
4. A one-step method for preparing a steel sulfide/samarium oxyhydroxide composite photocatalyst according to claim 1, characterized in that in step 3, the mixed solution B is subjected to a homogeneous hydrothermal reaction specifically: the mixed solution B Transfer to a homogeneous hydrothermal kettle, put in a homogeneous reactor, the filling ratio is controlled at 40%~60%, the reaction temperature is controlled at 160~180℃, and the reaction time is controlled at 10~16h.
5. The one-step method for preparing an indium sulfide/samarium oxyhydroxide composite photocatalyst according to claim 1, wherein the drying in step three is vacuum drying.
6. The one-step method for preparing an indium sulfide/samarium oxyhydroxide composite photocatalyst according to claim 5, wherein the drying temperature in step 3 is 60℃ and the drying time is 5h.
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