Abstract: The present disclosure provides an ecological governance method based on erosion prevention and control for a gentle slope farmland and relates to the technical field of ecological governance of farmlands. The ecological governance method based on erosion prevention and control for a gentle slope farmland includes the following steps: sampling a gentle slope farmland to investigate erosion thereof; and determining erosion of a gentle slope cultivated land and selecting a corresponding recovery strategy based on a detection result of a sample, a soil quality index (SQI), and a comprehensive vegetation quality index (VQI), where the recovery strategy includes a natural recovery method and a biological-farming comprehensive recovery method; enclosing the gentle slope cultivated land, fallowing the gentle slope cultivated land and reducing tillage; exterminating insect pests and poisonous weeds in the enclosed area; and turning over straws under soil by a cultivator. The growth of poisonous weeds is inhibited.

Abstract: A method for continuously preparing nanoparticles including a noble metal or an alloy thereof belongs to the technical field of preparation of inorganic nanomaterials. A three-way quartz tube microreactor is designed; noble metal solutions used as raw materials are continuously inputted into the microreactor by injection pumps; and a plasma technology is coupled to form discharge in the microreactor to directly prepare nanoparticles including a noble metal or an alloy thereof. The device and the method have low energy consumption, wide operation range, safety, high efficiency, green and environmental protection. The synthesized nanoparticles have high purity, small size, narrow particle size distribution and adjustable components.

Abstract: The present invention discloses a method for continuously preparing noble metal and alloy nanoparticles thereof, and belongs to the technical field of preparation of inorganic nanomaterials. A three-way quartz tube microreactor is designed; noble metal solutions used as raw materials are continuously inputted into the microreactor by injection pumps; and a plasma technology is coupled to form discharge in the microreactor to directly prepare noble metal and alloy nanoparticles thereof. The device and the method of the present invention have low energy consumption, wide operation range, safety, high efficiency, green and environmental protection. The synthesized nanoparticles have high purity, small size, narrow particle size distribution and adjustable components.