A kind of nanometer Pd material and preparation method thereof
Technical field
The present invention relates to technical field of nano material.
Background technology
Metal nano material has the character of many uniquenesses and causes people's extensive concern.And their character and its shape and size are closely bound up.Therefore produced the preparation method of nano material of the method for the metal nano material of many preparation specific dimensions and shape, particularly gold and silver.Palladium is a kind of important catalyst, has participated in many important catalytic reactions.Therefore, the preparation method of nanometer Pd material causes people's attention day by day in recent years.Prepared the nanometer Pd material of many different structures, reported that the 4817th page of the 19th volume of Langmuir the employing hydrazine reduces potassium chloropalladate and prepares palladium nanometer octahedron in the presence of TTAB as Veisz etc. 2003; Xiong etc. 2005 have reported that the 1237th page of the 5th volume of Nano.Lett. there is under the situation reduction palladium bichloride in employing ethylene glycol and reduces nano particle quantity with the iron chloride oxidation at polyvinylpyrrolidone, thereby prepare the palladium nanocube of large-size; They had reported that the employing citric acid existed under the situation reduction chlorine palladium acid sodium can prepare palladium nanometer icosahedron at polyvinylpyrrolidone for the 790th page at the 46th volume of Angew.Chem.Int.Ed. in 2007.Yet at present also not about the synthetic report of palladium nanometer cuboid.
Summary of the invention
The purpose of this invention is to provide a kind of nanometer Pd material and preparation method thereof.
A kind of nanometer Pd material provided by the invention is characterized in that, it is a palladium nanometer cuboid.
A kind of palladium nanometer cuboid preparation methods of the present invention, step and condition method are as follows:
Is volume ratio 10mM chlorine palladium aqueous acid and the 12.5-25mM softex kw aqueous solution of 1:20, be heated to 65-95 ℃, adding is the 100mM aqueous ascorbic acid of 0.16:1 with the volume ratio of 10mM chlorine palladium aqueous acid then, reacted 30 minutes, solution centrifugal is separated, the precipitation of collecting washes with water, and drying obtains palladium nanometer cuboid.
Palladium nanometer cuboid preparation method of the present invention is simple, and prepared palladium nanometer cuboid is expected to be used for fields such as catalysis and nano material preparation.
Description of drawings
The sem photograph of the cuboid of palladium nanometer described in Fig. 1: the embodiment 1.
The sem photograph of the cuboid of palladium nanometer described in Fig. 2: the embodiment 2.
The sem photograph of the cuboid of palladium nanometer described in Fig. 3: the embodiment 3.
The sem photograph of the cuboid of palladium nanometer described in Fig. 4: the embodiment 4.
The specific embodiment
By following examples to inventing further elaboration.
Embodiment 1
12.5mM softex kw aqueous solution with the 10mM chlorine palladium aqueous acid and 20 volumes of 1 volume, be heated to 95 ℃, adding is the 100mM aqueous ascorbic acid of 0.16:1 with the volume ratio of 10mM chlorine palladium aqueous acid then, react after 30 minutes, solution centrifugal is separated, the precipitation of collecting washes with water, and drying obtains palladium nanometer cuboid material.
Embodiment 2
15mM softex kw aqueous solution with the 10mM chlorine palladium aqueous acid and 20 volumes of 1 volume, be heated to 65 ℃, adding is the 100mM aqueous ascorbic acid of 0.16:1 with the volume ratio of 10mM chlorine palladium aqueous acid then, react after 30 minutes, solution centrifugal is separated, the precipitation of collecting washes with water, and drying obtains palladium nanometer cuboid.
Embodiment 3
25mM softex kw aqueous solution with the 10mM chlorine palladium aqueous acid and 20 volumes of 1 volume, be heated to 95 ℃, adding is the 100mMM aqueous ascorbic acid of 0.16:1 with the volume ratio of 10mM chlorine palladium aqueous acid then, react after 30 minutes, solution centrifugal is separated, the precipitation of collecting washes with water, and drying obtains palladium nanometer cuboid material.
Embodiment 4
25mM softex kw aqueous solution with the 10mM chlorine palladium aqueous acid and 20 volumes of 1 volume, be heated to 85 ℃, adding is the 100mM aqueous ascorbic acid of 0.16:1 with the volume ratio of 10mM chlorine palladium aqueous acid then, react after 30 minutes, solution centrifugal is separated, the precipitation of collecting washes with water, and drying obtains palladium nanometer cuboid material.