Preparation Of Gold Nano/molybdenum Disulfide Composite And Its Application In Detecting Glucose

The definition of nanomaterials refers to a class of materials that have reached the nanometer level in a certain dimension.These materials have played a very important role in the research and innovation of natural science since its inception.In the classification of nanomaterials,we can divide them into different types of materials such as zero-dimensional,one-dimensional,two-dimensional.For example,a two-dimensional material in which electrons are freely movable in only two dimensions,such as nanosheets,nanofilms,and the like.After graphene,transition metal disulfide materials have become a series of excellent nano-scale materials.These materials have unique structure and properties.Molybdenum disulfide is one of them.It is an important solid lubricant.It has unique optical and electrical properties and can be combined with a variety of inorganic nanoparticles to prepare two-dimensional nanocomposites for environmental,biomedical,energy storage,and catalysis.Glucose is the main energy source in the human body.It exists in our blood and is constantly involved in the metabolism of many living cells in the body.In these reactions,glucose is the most important energy supply,and it is also a lot of biochemical reactions.The intermediate product can promote the transformation and decomposition of substances in the body,and the presence of glucose enables the living body to operate in an orderly manner.Because the tissues and organs in our body have a large dependence on glucose,the glucose in the blood needs to be maintained at a suitable concentration range to maintain the balance of human function.However,when insulin secretion is absent or other biological factors are present,it can cause excessive blood sugar levels,which can lead to many diseases such as diabetes.Long-term hyperglycemia during diabetes can cause chronic damage to the eyes,kidneys,heart,and other tissues.The human body will cause many dysfunctions and endanger its own health.Therefore,detecting human blood glucose concentration is of great significance to human health.In this study,the role of two-dimensional transition metal disulfide nanomaterials was fully utilized,and molybdenum disulfide nanomaterials with excellent topography were prepared by surfactant stable stripping method.Nano-sized gold particles were prepared by sodium citrate reduction.Finally,the nano-sized gold particles/molybdenum disulfide composites were successfully prepared by combining molybdenum disulfide nanomaterials with gold particles.The excellent catalytic performance of this material was used to catalyze the decomposition of hydrogen peroxide,and it can be applied to glucose detection and detection.The results can be clearly observed by macroscopic colorimetry.The results obtained by this study are as follows:1.The gold nano/molybdenum disulfide nanocomposites were synthesized,and the structural characteristics and elemental compositions of the materials were characterized by transmission electron microscopy and elemental distribution analysis.2.Based on the catalytic ability of the above synthetic gold nano/molybdenum disulfide material,glucose and hydrogen peroxide were successfully detected by color contrast.The detection limit of hydrogen peroxide is about 2.6 μmol/L,and the detection limit of glucose is about 3.5 μmol/L.