Photocatalytic microsphere motor based on carbon dots as well as preparation method and application of photocatalytic microsphere motor
A technology of photocatalysis and microspheres, which is applied in the field of photocatalytic materials, can solve the problems of reducing the speed of micro-nano motors, unstable movement of fluorescence, laborious and time-consuming, etc., and achieves the effects of good repeatability, low cost and excellent fluorescence performance
Active Publication Date: 2020-09-01
SOUTH CHINA NORMAL UNIVERSITY
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Problems solved by technology
However, all reported Cu-based 2 The photocatalytic motor of O can only be tracked visually in a transparent solution under bright field in real time
Therefore, it remains a great challenge to develop photocatalytic micro-nanomotors with high motion speed, precise direction control, and real-time position tracking in complex microscopic environments.
[0004] Currently, most of the reported fluorescent micro-nanomotors are usually realized by modifying fluorescent molecules or fluorescence onto their surfaces, which are usually laborious and time-consuming. Furthermore, even if the motors are successfully modified, some problems will often be encountered afterwards. problems, such as erratic motion fluorescence, uneven brightness, etc. In addition, these processes may also slow down the speed of micro-nano motors
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[0033] Take the carbon material solution and mix it with the carrier material, heat, and add sodium hydroxide and glucose to perform a constant temperature reaction. After the reaction is completed, vacuum dry to obtain the product microsphere motor;
[0034] Preparation of a photocatalytic microsphere motor based on carbon dots:
[0035] 1) Preparation of carbon material solution:
[0036] Take 0.2 g of carbon fiber powder and add it to 10 M nitric acid solution and heat it to about 100°C to make it boil and evaporate and reflux for 4 h;
[0037] Collect the resulting solution and use NaHCO 3 Adjust the pH of the solution to about 3;
[0038] Subsequently, the solution was filtered through a 0.22μm BIOSHARPP membrane filter and further dialyzed in deionized water with a 3500 Da dialysis bag for 7 days;
[0039] Finally, the solution is subjected to ultrafiltration with 100 kDa, 50 kDa, 30 kDa, 10 kDa and 3 kDa centrifugal filters (Millipore) to obtain CDots of less than 3 kDa;
[0040] N...
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Abstract
The invention belongs to the technical field of photocatalytic materials, and particularly relates to a photocatalytic microsphere motor based on carbon dots as well as a preparation method and application of the photocatalytic microsphere motor. The photocatalytic microsphere motor is structurally characterized in that a carbon material is distributed on the surface of a microsphere carrier. Thepreparation raw materials of the photocatalytic microsphere motor comprise a carbon material and a carrier material. The preparation method comprises the following steps of: mixing the carbon materialsolution with the carrier material; heating an obtained mixture to 70-80 DEG C; adding an alkaline substance and reducing sugar as to perform a thermostatic reaction; performing vacuum drying after the completion of the reaction so as to obtain a product, namely the microsphere motor. The photocatalytic microsphere motor has excellent fluorescence performance and excellent optical movement direction adjustment characteristic; and the photocatalytic microsphere motor has high stability and consistent fluorescence, which provides possibility for observing the motion state of the motor in a complex environment; the photocatalytic microsphere motor has huge potential application in the nano medical fields of cell imaging, biological detection and the like, and has a wide prospect in controllable and intelligent robots executing special tasks in various practical applications.
Description
Technical field [0001] The invention belongs to the technical field of photocatalytic materials, and specifically relates to a photocatalytic microsphere motor based on carbon dots and a preparation method and application thereof. Background technique [0002] The micro-nano motor has attracted the attention of many researchers due to its autonomous movement performance. The bimetallic motor reported in 2004 kicked off the research craze of nanomotors. Micro-nanomotors have been developed for more than ten years, and significant progress has been made in terms of motor performance, manufacturing processes, and practical applications. At present, micro-nano motors with different compositions have been successfully prepared, such as metal wire micro-nano motors, semiconductor-based micro-nano motors, supramolecular micro-nano motors, and MOF-based micro-nano motors. Among many motors, photocatalytic micro-nano motors can convert light energy and chemical energy into kinetic energy...
Claims
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IPC IPC(8): C09K11/02C09K11/65B01J23/72H02N11/00
CPCC09K11/025C09K11/65B01J23/72H02N11/006B01J35/39Y02W10/37
Inventor 王佳佳董任峰吴惠英蔡跃鹏
Owner SOUTH CHINA NORMAL UNIVERSITY