Gomes Luiz Eduardo, Morishita Gustavo M, Icassatti Vitória E M, da Silva Thalita F, Machulek Junior Amilcar, Rodríguez-Gutiérrez Ingrid, Souza Flavio Leandro, Martins Cauê A, Wender Heberton
Laboratory of Advanced Technologies in Energy and Sustainability (LATES), Institute of Physics, Federal University do Mato Grosso do Sul, 79070-900 Campo Grande, Mato Grosso, Brazil.
Brazilian Nanotechnology National Laboratory (LNNano), Brazilian Center for Research in Energy and Materials (CNPEM), 13083-100 Campinas, São Paulo, Brazil.
ACS Appl Mater Interfaces. 2024 Apr 10;16(14):17453-17460. doi: 10.1021/acsami.3c18643. Epub 2024 Mar 27.
Given the current and escalating global energy and environmental concerns, this work explores an innovative approach to mitigate a widely employed commercial herbicide using a direct glyphosate (Gly) photocatalytic fuel cell (PFC). The device generates power continuously by converting solar radiation, degrading and mineralizing commercial glyphosate-based fuel, and reducing sodium persulfate at the cathode. Pristine and modified hematite photoanodes were coupled to Pt/C nanoparticles dispersed in a carbon paper (CP) support (Pt/C/CP) dark cathode by using an H-type cell. The Gly/persulfate PFC shows a remarkable current and power generation enhancement after dual-surface modification of pristine hematite with segregated Hf and FeNiO cocatalysts. The optimized photoanode elevates maximum current density () from 0.35 to 0.71 mA cm and maximum power generation () from 0.04 to 0.065 mW cm, representing 102.85 and 62.50% increase in and , respectively, as compared to pristine hematite. The system demonstrated stability over a studied period of 4 h; remarkably, the photodegradation of Gly proved substantial, achieving ∼98% degradation and ∼6% mineralization. Our findings may significantly contribute to reducing Gly's environmental impact in agribusiness since it may convert the pollutant into energy at zero bias. The proposed device offers a sustainable solution to counteract Gly pollution while concurrently harnessing solar energy for power generation.
鉴于当前全球能源和环境问题不断升级，本研究探索了一种创新方法，即使用直接草甘膦（Gly）光催化燃料电池（PFC）来减轻一种广泛使用的商业除草剂的影响。该装置通过将太阳辐射转化为电能，降解和矿化基于草甘膦的商业燃料，并在阴极还原过硫酸钠，从而持续发电。通过使用H型电池，将原始和改性的赤铁矿光阳极与分散在碳纸（CP）载体（Pt/C/CP）暗阴极中的Pt/C纳米颗粒耦合。在用分离的Hf和FeNiO助催化剂对原始赤铁矿进行双表面改性后，Gly/过硫酸盐PFC显示出显著的电流和发电增强。优化后的光阳极将最大电流密度（）从0.35提高到0.71 mA cm，最大发电量（）从0.04提高到0.065 mW cm，与原始赤铁矿相比，和分别增加了102.85%和62.50%。该系统在4小时的研究期间表现出稳定性；值得注意的是，草甘膦的光降解效果显著，降解率达到约98%，矿化率达到约6%。我们的研究结果可能对减少草甘膦在农业企业中的环境影响有重大贡献，因为它可以在零偏压下将污染物转化为能量。所提出的装置提供了一种可持续的解决方案，既能抵消草甘膦污染，又能同时利用太阳能发电。
