ACS Applied Energy Materials
·
2021
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IF 6.024
Ran Yin,Ke-Xiang Wang,Shuang Cui,Bing-Bing Fan,Jing-Wen Liu,Yu-Kun Gao,Ting-Ting You,Peng-Gang Yin
The interface closely related to carrier transport plays a vital role in high-performance perovskite solar cells (PSCs). In this work, an ionic liquid (IL) 1-butyl-3-methylimidazole hexafluorophosphate (BMIMPF6) has been introduced to simultaneously modify the TiO2 and perovskite films, which improves the energy level matching and contact of the TiO2/CsPbI2Br interface as well as provides perovskite films with larger grain size, leading to more faster charge transfer and lower energy loss. Furthermore, the BMIMPF6 modifier passivates the perovskite film defects and reduces defect-induced charge trapping and recombination in CsPbI2Br PSCs. Under dual-interface modification, the open-circuit voltage of the modified device increased to 1.22 V, and the power conversion efficiency (PCE) increased from 10.65 to 13.19%. Moreover, the unencapsulated modified devices exhibit an enhanced stability and maintain 91% of their initial PCE after 60 days of storage. This work has provided a strategy for efficient and stable PSCs by exploiting an IL to optimize the dual-interface at the same time.
研究领域:
材料科学
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能源技术
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光电转换
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DOI
高影响因子
FOOD CHEMISTRY
·
2022
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IF 9.231
Gangfeng Li,Shaobiao Feng,Lili Yan,Lijuan Yang,Bei Huo,Liuliu Wang,Sheng Luo,Dexin Yang
Due to a small amount of Cu (Ⅱ) ions being beneficial and too much being harmful, it is necessary to establish a rapid and direct detection method. Herein, we reported a platform based on multiwalled carbon nanotubes (MWCNTs), 1-butyl-3-methylimidazolium hexafluorophosphate (BMIMPF6), and Nafion solution-modified glassy carbon electrode (GCE) for the direct electrochemical detection of Cu (II) ions. We used differential pulse anodic stripping voltammetry, including the electrodeposition of Cu (Ⅱ) ions on the modified GCE and subsequent anodic stripping. Under the optimum conditions, the linear range was 20 μg·L −1 ∼ 950 μg·L −1 , the limit of detection (LOD) was 16 μg·L −1 , and the limit of quantification (LOQ) was 54 μg·L −1 for Cu (II). We realized the quantitative detection of Cu (Ⅱ) ions in juice and tea beverage without tedious pretreatment. The result showed that the sensor had good anti-interference and practicability for actual food samples.
研究领域:
分析化学
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电化学
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食品科学
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产品关联
DOI
PubMed
高影响因子
Analytical Methods
·
2015
·Vol. 7
·期 13
·5419-5427
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IF 1.821
Xiaoli Qin,Wenjuan Guo,Huijing Yu,Juan Zhao,Meishan Pei
A simple electrochemical sensor based on a novel composite film consisting of multi-walled carbon nanotubes (MWCNTs), a room temperature ionic liquid (RTIL) of 1-butyl-3-methylimidazolium hexafluorophosphate (BMIMPF6), and amino functionalized graphene (GR–CO–NH–CH2–CH2–NH2) was constructed for the detection of kanamycin. Firstly, MWCNTs–BMIMPF6 composites were fabricated on the surface of a glass carbon electrode (GCE). The synergy mechanism between the MWCNTs and RTIL has been discussed. Secondly, GR–CO–NH–CH2–CH2–NH2 was modified on the first film, which could greatly improve the conductivity of the electrode. The structure of the resultant graphene oxide (GO) was confirmed by FTIR and SEM. The properties of the aptasensor were characterized by electrochemical methods. Under the optimum conditions, the electrochemical aptasensor exhibited a wide linear range for kanamycin from 0.001 to 100 μM with a low limit of detection of 0.87 nM (S/N = 3). The as-prepared aptasensor showed high sensitivity, reproducibility and stability. Finally, the proposed electrochemical aptasensor was successfully applied for the detection of kanamycin in a real sample.
研究领域:
分析化学
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生物传感技术
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材料科学
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产品关联
DOI
高影响因子
BIORESOURCE TECHNOLOGY
·
2016
·
IF 4.917
Yu-Cai He,Zhi-Cheng Tao,Jun-Hua Di,Liang Chen,Lin-Bing Zhang,Dan-Ping Zhang,Gang-Gang Chong,Feng Liu,Yun Ding,Chun-Xia Jiang,Cui-Luan Ma
It was the first report that the concentrated hydrolyzates from the enzymatic hydrolysis of dilute NaOH (3 wt%)-soaking rice straw at 30 °C was used to form [Bmim]PF 6 -hydrolyzate (50:50, v/v) media for bioconverting ethyl 4-chloro-3-oxobutanoate (COBE) into ethyl ( R )-4-chloro-3-hydroxybutanoate [( R )-CHBE] (>99% e.e. ) with recombinant E. coli CCZU-A13. Compared with pure glucose, the hydrolyzates could promote both initial reaction rate and the intracellular NADH content. Furthermore, emulsifier OP-10 (20 mM) was employed to improve the reductase activity. Moreover, Hp-β-cyclodextrin (0.01 mol Hp-β-cyclodextrin/mol COBE) was also added into this bioreaction system for enhancing the biosynthesis of ( R )-CHBE from COBE by E. coli CCZU-A13 whole-cells. The yield of ( R )-CHBE (>99% e.e. ) from 800 mM COBE was obtained at 100% in the [Bmim]PF 6 -hydrolyzate (50:50, v/v) media by supplementation of OP-10 (20 mM) and Hp-β-CD (8 mM). In conclusion, an effective strategy for the biosynthesis of ( R )-CHBE was successfully demonstrated.
研究领域:
生物化学
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微生物学
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DOI
高影响因子
BIOSENSORS & BIOELECTRONICS
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2015
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IF 6.409
Yuliang Li,Junlin He,Yazhen Niu,Chao Yu
In this paper, a simple, ultrasensitive and label-free electrochemical α2,6-sialylated glycans biosensor based on reduced graphene oxide-tetraethylene pentamine-1-butyl-3-methylimidazolium hexafluorophosphate (BMIMPF 6 ) hybrids was developed. Due to the abundance of amino groups from reduced graphene oxide-tetraethylene pentamine (rGO-TEPA) and the electrostatic interaction of BMIMPF 6 , bimetallic gold platinum alloy nanoparticles (AuPtNPs) were densely adsorbed onto the surface of the nanocomposite , providing a large surface area available for the immobilization of Sambucus nigra agglutinin (SNA). AuPtNPs have excellent conductivity and catalytic activity , which can promote electron transfer between the electrolyte solution and the surface of electrode and can enhance the sensitivity of biosensor. SNA, which specifically binds α2,6-sialylated glycans, was covalently immobilized on AuPtNPs for specific detection of α2,6-sialylated glycans in human serum. Under optimal experimental conditions, amperometric response changes were used to detect α2,6-sialylated glycans with a broad linear range of 10 fg mL −1 –1 μg mL − 1 and a low detection limit of 3 fg mL − 1 ( S / N =3). When applied to spiked serum samples, the recovery of the developed biosensor ranged from 100.8% to 101.4%, suggesting that the electrochemical biosensor would be suitable for the practical detection of α2,6-sialylated glycans.
研究领域:
生物传感技术
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医学诊断
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产品关联
DOI
PubMed
高影响因子
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