Ultra-sensitive agricultural gas sensor precisely controls agricultural carbon emissions

With the development of the economy, the structure of food consumption is also constantly changing, and people's demand for agricultural multi-functionality is also gradually increasing
.
In the first half of this year, China's agricultural and rural economy continued to improve.
The production of summer wheat and wheat increased, and there was a foundation for a bumper grain harvest throughout the year.
The supply of "vegetable baskets" products was sufficient, and the market was running smoothly
.
At the same time, agriculture is also one of the important areas to achieve carbon peaking and carbon neutrality.
Promoting carbon peaking and carbon neutrality in agriculture is an important part of accelerating the construction of agro-ecological civilization, and it is also an important part of comprehensively addressing climate change.
way
.

In fact, the proportion of greenhouse gas emissions from agricultural production activities itself is not large, and the production and consumption of agricultural intermediate inputs are the main sources of agricultural greenhouse gas emissions
.
The total amount of greenhouse gas emissions from agricultural ecosystems accounts for 6.
7% to 7.
9% of the national total, of which methane and nitrous oxide are mainly non-carbon dioxide greenhouse gases
.
Agriculture is one of the main sources of global greenhouse gas emissions, and its impact on global warming cannot be ignored
.

In promoting the construction of ecological civilization and the transformation of agricultural green and low-carbon development, China has covered policies and regulations related to agricultural carbon emission reduction in terms of reducing agricultural chemical input, livestock management, farmland management, resource protection and waste recycling
.
The Law of the People's Republic of China on the Prevention and Control of Air Pollution, which was revised and passed in 2015, included the control of emissions from agricultural sources into the governance of pollution reduction and carbon reduction; The Agricultural Green Development Plan is China's first special plan for agricultural green development, which makes systematic arrangements for accelerating the comprehensive green transformation and low-carbon development of agriculture during the "14th Five-Year Plan" period.
The Opinions on Doing a Good Job in Carbon Reaching and Carbon Neutralization under the New Development Concept and the Action Plan for Carbon Reaching Before 2030, clarify the comprehensive deployment and specific implementation plan for the major work of Carbon Reaching and Carbon Neutralization.
The agricultural action plan proposes to "promote carbon emission reduction in agriculture and rural areas"
.

According to statistics from the Food and Agriculture Organization of the United Nations, the greenhouse gas released from agricultural land exceeds 30% of the total global anthropogenic greenhouse gas emissions, but at the same time, agricultural ecosystems can also offset 80% of the greenhouse gas emissions caused by agriculture
.
The accounting of agricultural carbon emissions is the basis for the formulation and implementation of agricultural carbon emission reduction policies.
Accurate measurement of greenhouse gas emissions from agricultural activities can provide scientific support for accurately controlling agricultural carbon emissions and evaluating the effects of agricultural emission reduction measures
.

A few days ago, the innovation team of agricultural and rural resources digital management of the Institute of Agricultural Information of the Chinese Academy of Agricultural Sciences synthesized indium oxide and molybdenum disulfide three-dimensional micro flower-like hierarchical structure by hydrothermal method, using the positive charge of indium oxide and the negative charge of molybdenum disulfide.
, a porous indium oxide micro-flower-like composite structure decorated with molybdenum disulfide nanosheets was obtained by electrostatic force , and deposited on the interdigitated electrode structure
.

Through structural control and orderly composite of nanomaterials, the sensitive film of the composite structure exhibits ultra -sensitive, ultra-stable, and fast response to nitrogen dioxide gas at room temperature
.
And the microstructural features, heterojunction effect and synergistic effect of the composite structure jointly contributed to the excellent sensitivity to gases
.
This achievement provides a theoretical basis and a realization approach for realizing the ultra-sensitivity and ultra-stability of agricultural gas sensors in complex environments
.

Agriculture is the "ballast stone" of economic and social development
.
The accounting of agricultural carbon emissions is a systematic project with cumbersome steps and a lot of data, which consumes a lot of time and economic costs
.
In recent years, with the continuous development of science and technology, the instruments and meters related to the detection of agricultural carbon emissions have also continued to improve, and continue to help "carbon peaks and carbon neutrality"
.
At the same time, not only the accuracy of agricultural carbon emissions accounting, but also local conditions
.
Continuously improve related technologies, and innovate agricultural greenhouse gas monitoring and emission reduction technologies that meet the characteristics of agricultural production and natural geographical features in the region, which is an important direction for further deepening and combining with local practice in the future research on agricultural carbon emissions
.

(Data reference source: Chinese Science Journal)