The new technology is expected to efficiently degrade sulfonylurea herbicides

Schematic diagram of preparation and application of single-atom modified carbon nitride nanomaterials. Courtesy of the Chinese Academy of Agricultural Sciences

Effects of sulfonylurea herbicides on soybean stem and leaf growth before and after degradation. Courtesy of the Chinese Academy of Agricultural Sciences

Recently, the Tobacco Research Institute of the Chinese Academy of Agricultural Sciences, in conjunction with domestic and foreign universities, based on single-atom modified nanomaterials, used visible light catalytic degradation technology to effectively reduce the medicinal harm of sulfonylurea herbicides on stubble-sensitive crops. The results were published in the Chemical Engineering Journal.

Sulfonylurea herbicides are currently one of the most widely used herbicide species in the world, and are widely used in the control of broad-leaved weeds and grasses. In recent years, studies have found that sulfonylurea herbicides have a serious problem with stubble damage to crops such as tobacco, corn, and soybeans, but there is still a lack of efficient degradation technology.

Based on visible photocatalysis technology, a series of experiments were carried out on the degradation law, degradation mechanism and toxicity evaluation of sulfonylurea herbicides. The results show that the visible photocatalytic degradation of a variety of sulfonylurea herbicides can be achieved simultaneously by using carbon nitride nanomaterials, and the performance of nanomaterials can be significantly improved by single atom modification, and the degradation rate of the target herbicides can be increased by four times. Combined with theoretical calculations, the researchers further demonstrated that the technique can effectively reduce the harmful effect of sulfonylurea herbicides on stubble-sensitive crops.

The research was funded by the National Natural Science Foundation of China and other projects. (Source: China Science Daily, Li Chen, Ju Xiaohui)

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