通过富集培养,从化工厂的活性污泥中分离出1株能以芳香族化合物作为惟一碳源和能源的优势菌株PM8,对该菌株进行了鉴定和降解特性研究。结果表明,经形态观察和16 S rDNA序列分析,该菌株属于苍白杆菌属(Ochrobactrum);30℃、200 r/min培养...通过富集培养,从化工厂的活性污泥中分离出1株能以芳香族化合物作为惟一碳源和能源的优势菌株PM8,对该菌株进行了鉴定和降解特性研究。结果表明,经形态观察和16 S rDNA序列分析,该菌株属于苍白杆菌属(Ochrobactrum);30℃、200 r/min培养8 d,该菌株对500 mg/L萘和吡啶的降解率分别为77%和88%;在72 h内,菌株PM8对焦化废水、酒厂废水和猪粪水的CODCr去除率分别达到11.69%、83.68%、57.85%。PM8在含有芳香族化合物的污水处理中具有广泛的应用前景。展开更多
Layer-by-layer(LBL)process has emerged as a promising method in the advancement of organic photovoltaics,emphasizing scalability and reproducibility.More importantly,it provides enhanced morphological control for boos...Layer-by-layer(LBL)process has emerged as a promising method in the advancement of organic photovoltaics,emphasizing scalability and reproducibility.More importantly,it provides enhanced morphological control for boosting carrier mobility(μ)and power conversion efficiency.By employing a multiscale approach that combined first-principles calculations,molecular dynamics simulations,and kinetic Monte Carlo methods,the relationship between LBL morphology engineering and carrier mobility in donor/acceptor(PM6/L8-BO)thin films is elucidated.During solvent evaporation,the order of solid-phase formation in LBL films was top surface,bottom region,and then the middle region.The early solid precipitation from precursor solutions was acceptor,resulting in a well-ordered molecular arrangement and reducing energy disorder of acceptor LUMO levels.Furthermore,the difference in energy disorders between the A/D blend region and the pure A or D domains enabled LBL morphology engineering to balance electron and hole mobilities,thereby mitigating charge accumulation and recombination.LBL-manufactured films presented higher carrier mobility(𝜇LBL e=𝜇LBL h=1.9×10−3 cm2 V−1 s−1)compared to bulk heterojunction(BHJ)films(𝜇BHJ e>𝜇BHJ h=0.1×10−3 cm2⋅V−1 s−1).These mechanisms provided insights into strategies for enhancing charge extraction of photo-generated charge carriers through LBL engineering,driving the development of efficient organic photovoltaic materials.展开更多
基金supported by the National Science Foundation of China(Grant Nos.22033006,92372105,and 52073005)Beijing Natural Science Foundation(Grant No.JQ23020).
文摘Layer-by-layer(LBL)process has emerged as a promising method in the advancement of organic photovoltaics,emphasizing scalability and reproducibility.More importantly,it provides enhanced morphological control for boosting carrier mobility(μ)and power conversion efficiency.By employing a multiscale approach that combined first-principles calculations,molecular dynamics simulations,and kinetic Monte Carlo methods,the relationship between LBL morphology engineering and carrier mobility in donor/acceptor(PM6/L8-BO)thin films is elucidated.During solvent evaporation,the order of solid-phase formation in LBL films was top surface,bottom region,and then the middle region.The early solid precipitation from precursor solutions was acceptor,resulting in a well-ordered molecular arrangement and reducing energy disorder of acceptor LUMO levels.Furthermore,the difference in energy disorders between the A/D blend region and the pure A or D domains enabled LBL morphology engineering to balance electron and hole mobilities,thereby mitigating charge accumulation and recombination.LBL-manufactured films presented higher carrier mobility(𝜇LBL e=𝜇LBL h=1.9×10−3 cm2 V−1 s−1)compared to bulk heterojunction(BHJ)films(𝜇BHJ e>𝜇BHJ h=0.1×10−3 cm2⋅V−1 s−1).These mechanisms provided insights into strategies for enhancing charge extraction of photo-generated charge carriers through LBL engineering,driving the development of efficient organic photovoltaic materials.
