Preparation Of Boric Acid Functionalized ZnO Quantum Dots And Its Application In Detection Of Catechol In Water Environment

Catechol(CC)is a dihydric phenolic compound,an important chemical intermediate,an important component of developer,disinfectant,pesticide,etc.However,due to its extremely low degradation ability in the natural environment,once it enters the human body,it will cause physiological diseases of human organs.Therefore,it is necessary to find a sensitive and accurate method for detecting residual CC in the environment to protect human health.Fluorescence analysis,as an emerging analysis and detection method,has the advantages of low detection limit,high sensitivity,short response time,etc.It is widely used to detect various types of substances,but the fluorescent sensor itself often does not have the ability to specifically identify the target,and often needs to find suitable methods to create conditions.At present,there are few reports on the specific detection of the target by the new environmentally friendly composite Zn O quantum dots fluorescence sensor.In this paper,CC is used as the target,Zn O quantum dots as fluorescent sensors.Combining quantum dot modification method,sol-gel method and precipitation polymerization method,Zn O quantum dots composite materials are synthesized,and it is used to quickly detect CC in water,the main research contents are as follows:.The main research contents are as follows:(1)Two-step synthesis of 3-aminophenylboronic acid modified Zn O quantum dots(APBA-Zn O QDs),and applied it to the specific detection of catechol.The optical properties,structure,and morphology of 3-aminophenylboronic acid modified zinc oxide quantum dots were characterized by fluorescence spectrophotometer,fourier transform infrared spectroscopy,and transmission electron microscopy;Then,by optimizing the concentration of APBA-Zn O QDs,response time and p H during detection,the best detection conditions were determined;Under the best detection conditions,the detection and recognition ability of APBA-Zn O QDs for CC were determined,and APBA-Zn O QDs is applied to the detection of actual water environment.(2)Based on the sol-gel method,Zn O quantum dots molecularly imprinted fluorescent sensors(MIPs-Zn O QDs)were synthesized and applied to the specific detection of catechol.The optical properties,structure,and morphology of MIPs-Zn O QDs were characterized by fluorescence spectrophotometer,fourier transform infrared spectroscopy,and transmission electron microscopy;By examining factors such as concentration,stability,and optimal response time to CC,the optimal conditions for the detection of CC by Zn O quantum dots molecularly imprinted fluorescent sensors were determined;Under the optimal detection conditions,the ability of Zn O quantum dots molecularly imprinted polymers synthesized by the sol-gel method to detect and recognize CC was studied,and then it is applied to the detection of actual water environment.(3)Synthesis of Zn O quantum dots molecularly imprinted fluorescent sensor based on precipitation polymerization method and its application to the specific detection of catechol.The optical properties,structure,and morphology of MIPs-Zn O QDs were characterized by fluorescence spectrophotometer,fourier transform infrared spectroscopy,and transmission electron microscopy;The conditions of CC detection were optimized by studying factors such as MIPs-Zn O QDs concentration,fluorescence stability,and response time to CC.Under the optimal detection conditions,the ability of the Zn O quantum dots molecularly imprinted fluorescent sensor synthesized by the precipitation polymerization method to detect and recognize CC was studied and applied to the detection of CC in water environment.