Oxygen-containing lanthanum sulfate thin film and preparation method thereof by layer-by-layer self assembly of nanosheets
A layer-by-layer self-assembly and lanthanum sulfate technology, applied in the field of material science, can solve the problems of low film-forming speed, inappropriateness, and uncontrollable film thickness, etc., and achieve the effect of high film-forming quality and fast film-forming rate
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Embodiment 1
[0042] An oxygen-containing lanthanum sulfate film, the film thickness is 5-10nm; the composition of the oxygen-containing lanthanum sulfate film is La 2 o 2 SO 4 , wherein, according to the molar ratio of elements, La: O: S=2:6:1;
[0043] A method for preparing nano-sheet layer self-assembly of lanthanum oxysulfate film, comprising the following steps:
[0044] (1) Prepare the solution
[0045] Lanthanum nitrate hexahydrate (La(NO 3 ) 3 ·6H 2 O) Mix well in deionized water to prepare La 3+ Lanthanum nitrate (La(NO) with a concentration of 0.03mol / L 3 ) 3 ) solution;
[0046] (2) ammonium sulfate particles ((NH 4 ) 2 SO 4 ) is dissolved in the prepared lanthanum nitrate solution and stirred for 10 minutes. When the solution is transparent and clear, the ammonium sulfate particles are fully dissolved to obtain a mixed solution of lanthanum nitrate and ammonium sulfate; wherein, the prepared lanthanum nitrate and sulfate In the mixed solution of ammonium, by molar ...
Embodiment 2
[0059] An oxygen-containing lanthanum sulfate film, the film thickness is 40-50nm; the composition of the oxygen-containing lanthanum sulfate film is (La, Eu) 2 o 2 SO 4 , wherein, by element molar ratio, (La+Eu):O:S=2:6:1; by molar ratio, La:Eu=17:3.
[0060] A method for preparing nano-sheet self-assembly of lanthanum oxysulfate thin films, comprising the following steps:
[0061] (1) Prepare the solution
[0062] Lanthanum nitrate hexahydrate (La(NO 3 ) 3 ·6H 2 O) Mix well in deionized water to prepare La 3+ Lanthanum nitrate (La(NO) with a concentration of 0.20mol / L 3 ) 3 ) solution;
[0063] Europium nitrate hexahydrate (Eu(NO 3 ) 3 ·6H 2 O) Mix well in deionized water and prepare Eu 3+ Europium nitrate (Eu(NO 3 ) 3 ) solution;
[0064] (2) Mix the prepared lanthanum nitrate solution with the prepared europium nitrate solution to obtain a mixed solution of lanthanum nitrate and europium nitrate; wherein, by molar ratio, lanthanum nitrate: europium nitrate=17...
Embodiment 3
[0077] An oxygen-containing lanthanum sulfate film, the film thickness is 20-30nm; the composition of the oxygen-containing lanthanum sulfate film is (La, Eu) 2 o 2 SO 4 , wherein, by element molar ratio, (La+Eu):O:S=2:6:1; by molar ratio, La:Eu=9:1.
[0078] A method for preparing nano-sheet self-assembly of lanthanum oxysulfate thin films, comprising the following steps:
[0079] (1) Prepare the solution
[0080] Lanthanum nitrate hexahydrate (La(NO 3 ) 3 ·6H 2 O) Mix well in deionized water to prepare La 3+ Lanthanum nitrate (La(NO) with a concentration of 0.10mol / L 3 ) 3 ) solution;
[0081] Europium nitrate hexahydrate (Eu(NO 3 ) 3 ·6H 2 O) Mix well in deionized water and prepare Eu 3+ Europium nitrate (Eu(NO 3 ) 3 ) solution;
[0082] (2) Mix the prepared lanthanum nitrate solution with the prepared europium nitrate solution to obtain a mixed solution of lanthanum nitrate and europium nitrate; wherein, by molar ratio, lanthanum nitrate: europium nitrate=9...
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