Materials Today Chemistry
·
2024
·
IF 6.7
Ruihua Zhang,Xujun Chen,Zhengzhong Wan,Maoyuan Yin,Longgang Ma,Xinqing Xiao
With the rapid development of smart agriculture, it is of great significance to monitor soil moisture through humidity sensors to maintain suitable soil environmental conditions and improve crop yield and quality. This study reports a self-powered humidity sensor (SPHS) based on moisture electricity generation, which was designed by using a humidity-sensitive composite film composed of polystyrene sulfonic acid: polyvinyl alcohol doped LiCl as the electrolyte layer and combined with copper and aluminum electrodes. The SPHS easily adsorbs and diffuses water molecules in humid environment, and relies on the principles of ion diffusion and electrochemical reaction to realize the sensing of soil moisture, without the external power source, and with good reliability and durability. The SPHS can spontaneously generate current response over a relative humidity (RH) range of 33 %–91 %, with a current response of 2.6 μA at 33 % RH and up to 76.1 μA at 91 % RH, which provides excellent RH-current linear response characteristics (R 2 = 0.988). SPHS can be successfully applied in the field of human wearable devices, such as integration into masks for human breathing monitoring, as well as having excellent application potential in contactless human-computer interfaces. By integrating smart sensing technology and IoT communication technology, a smart agricultural environment sensing system was built in conjunction with SPHS for in-situ monitoring of soil moisture, ambient temperature, and light intensity to achieve real-time monitoring of the farmland environment, which promotes the development of agricultural production in the direction of intelligence, efficiency, and sustainability.
研究领域:
农业工程
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材料科学
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传感技术
✓ 已验证
产品关联
DOI
高影响因子
Advanced Composites and Hybrid Materials
·
2023
·Vol. 7
·期 1
·1-13
·
IF 20.1
Zhan Xue-Qing,Ran Zhuo-Qing,Bao Hong-Yu,Ye Qin,Chen Han,Fu Qiang,Ni Wang,Xu Jia-Min,Ma Ning,Tsai Fang-Chang
As a functional material, hydrogels hold promise in agricultural irrigation, potentially solving the problem of low utilization of irrigation water from the source. To enable more intuitive monitoring of soil moisture and achieve on-demand irrigation, a conductive hydrogel is being explored as a solenoid valve controller for intelligent irrigation. Here, intelligent hydrogel poly (acrylic acid-co–N-methylolacrylamide)/poly(3,4-ethylenedioxythiophene):polystyrene sulfonate, P(AA-co–N-MA)/PEDOT:PSS, with a dual network was synthesized under mild conditions through Na 2 SO 3 -APS (ammonium persulfate) initiation system. The structural design endows the hydrogel with excellent mechanical properties (elongation at break up to 2400%) and sensitive sensing performance (gauge factor, GF, is 8.14). The anti-fatigue properties of the hydrogel have proved that the material has good durability and good service life as a sensing material. In addition, by incorporating the relationship between moisture and conductivity, the hydrogel could be utilized as a controller for irrigation valves, enabling intelligent irrigation and effective conservation of water resources through soil moisture monitoring. Graphical abstract The intelligent hydrogel P(AA-co–N-MA)/PEDOT:PSS could be utilized as a controller of solenoid valve for irrigation through soil moisture monitoring.
研究领域:
材料科学
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农业工程
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2024
·
IF 12.2
Tangrong Zhou,Zhihong Xu,Shahla Hosseini Bai,Minzhe Zhou,Wenhui Tang,Bin Ma,Manyun Zhang
Carbendazim residue has been widely concerned, and nitrous oxide (N 2 O) is one of the dominant greenhouse gases. Microbial metabolisms are fundamental processes of removing organic pollutant and producing N 2 O. Nitrification inhibitor 3,4-dimethylpyrazole phosphate (DMPP) can change soil abiotic properties and microbial communities and simultaneously affect carbendazim degradation and N 2 O emission. In this study, the comprehensive linkages among carbendazim residue, N 2 O emission and microbial community after the DMPP application were quantified under different soil moistures. Under 90% WHC, the DMPP application significantly reduced carbendazim residue by 54.82% and reduced soil N 2 O emission by 98.68%. The carbendazim residue was negatively related to soil ammonium nitrogen (NH 4 + -N), urease activity, and ratios of Bacteroidetes , Thaumarchaeota and Nitrospirae under 90% WHC, and the N 2 O emission was negatively related to NH 4 + -N content and relative abundance of Acidobacteria under the 60% WHC condition. In the whole (60% and 90% WHC together), the carbendazim residue was negatively related to the abundances of nrf A (correlation coefficient = −0.623) and nrf H (correlation coefficient = −0.468) genes. The hao gene was negatively related to the carbendazim residue but was positively related to the N 2 O emission rate. The DMPP application had the promising potential to simultaneously reduce ecological risks of fungicide residue and N 2 O emission via altering soil abiotic properties, microbial activities and communities and functional genes. Environmental Implication Carbendazim was a high-efficiency fungicide that was widely used in agricultural production. Nitrous oxide (N 2 O) is the third most important greenhouse gas responsible for global warming. The 3, 4-dimethylpyrazole phosphate (DMPP) is an effective nitrification inhibitor widely used in agricultural production. This study indicated that the DMPP application reduced soil carbendazim residues and N 2 O emission. The asymmetric linkages among the carbendazim residue, N 2 O emission, microbial community and functional gene abundance were regulated by the DMPP application and soil moisture. The results could broaden our horizons on the utilizations DMPP in decreasing fungicide risks and N 2 O emission.
研究领域:
环境科学
·
微生物学
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农业
·
土壤学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2021
·
IF 6.953
Guohua Dong,Zhonghua Mu,Dongni Liu,Luwen Shang,Wenzhi Zhang,Yueyue Gao,Ming Zhao,Xiaohong Zhang,Shijie Chen,Minghui Wei
In this work, a novel starch phosphate carbamate hydrogel (SPC-Hydrogel) and its corresponding urea hydrogel (SPCU-Hydrogel) slow-release fertilizer (SRF) were prepared by one-step free radical copolymerization of SPC and acrylamide (AM) without and with urea addition. A series of characterization measurements including FTIR, XRD, EDS, XPS are utilized to confirm the successful formation of the SPC-Hydrogel. The SEM shows SPC-Hydrogel has a porous three-dimensional network architecture. Furthermore, SPC-Hydrogel matrix exhibits superior water absorbency achieving 80.2 g/g than that (70.5 g/g) of the native starch hydrogel (NS-Hydrogel) and desirable water retention capacity in soil with a weight loss of only 48% for 13 days. Compared with pure urea and NS based urea hydrogel (NSU-Hydrogel), the SPCU-Hydrogel releases 50.3% for 15 h, achieving an almost complete release more than 25 h in aqueous phase. While only 46.6% of urea is released in 20 days which extends about 30 days in soil column assays. The maize seedlings growth assays also present an intuitive evaluation on the prominent soil water holding and plant growth promotion role of SPCU-Hydrogel. In conclusion, the present work has demonstrated a novel strategy via preparing biomass hydrogel SRF to enhance the utilization effectiveness of fertilizer and retain soil humidity.
研究领域:
农业科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）