▎ 摘　　要

NOVELTY - Constructing light-assisted bipolar self-powered aptamer sensor comprises (1) mixing tetrabutyl titanate with ethanol to obtain solution A, mixing concentrated nitric acid, ethanol and water to obtain solution B, adding solution A dropwise to solution B and uniformly stirring to obtain mixed solution C, transferring to stainless steel autoclave for solvent thermal reaction, obtaining solid product of titanium dioxide after the reaction is completed, grinding the obtained titanium dioxide and sodium borohydride thoroughly in mortar and transferring to porcelain crucible, calcining and reducing in tube furnace under argon atmosphere, and obtaining the solid product boron-titanium dioxide after the reaction is completed. USE - The sensor is useful for detecting sulfamethazine (claimed). ADVANTAGE - The sensor: does not require external power supply; supplies energy for its detection process; uses simple multimeter as direct readout strategy; is easy to miniaturize and portable; realizes on-site detection; at the same time, anode and cathode of the sensor are made of semiconductor materials; avoids the use of biologically active components and precious metal electrodes platinum; greatly improves the solar energy utilization efficiency; and reduces the production cost. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for use method of the constructing light-assisted bipolar self-powered aptamer sensor.