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Dye-sensitized photoelectrochemical tandem cells have shown the promise for light driven hydrogen production from water owing to the low cost,wide absorption spectra in the visible region and ease to process of their constitutive photoelectrode materials.However,most photo-driven water splitting photoelectrochemical cells driven by organic dye sensitized solar cells exhibit unsatisfactory hydrogen evolution rate,primarily attributed to their poor light capturing ability and low photocurrent performance.Here we present the construction of a tandem system consisting of an organic blue-colored S5 sensitizer-based dyesensitized photoelectrochemical cell(DSPEC) wired in series with three spectral-complemental dyes BTA-2,APP-3 and APP-1 sensitizers-based dye-sensitized solar cell(DSC),respectively.The two spectral-complemental chromophores were used in DSC and DSPEC to ensure that the full solar spectrum could be absorbed as much as possible.The results showed that the photocurrent of tandem device was closely related to the open-circuit voltage(Voc) of sensitized DSC,in which the tandem configuration consisting of S5 based DSPEC and BTA-2 based DSC gave the best photocurrent.On this basis,tandem device with the only light energy and no external applied electrical bias was further constructed of BTA-2 based 2-junction DSC and S5 based DSPEC and obtained a photocurrent of 500 μA cm-2 for hydrogen generation.Furthermore,I-/I3-was used as a redox couple between dye regeneration and O2 production on the surface of Pt-IrO2/WO3.The strategy opens up the application of pure organic dyes in DSC/DSPEC tandem device. 相似文献
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High chemical yields and good enantiomeric excesses are obtained by using soluble polymer-supported tartrate ester in the epoxidation of trans-hex-2-en-1-ol using Ti(OPri)4/tert-butyl hydroperoxide. 相似文献
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本文叙述了兴国红鲤(Cyprinus carpio var.singuonensis)胚胎不同发育时期的形态特征,从受精卵到鱼苗孵化出膜被划分为31个发育时期;报导了胚胎各期发育所需时间。兴国红鲤在水体水温为22.39±2.44℃条件下,胚胎发育历时共62小时又58分钟,胚胎发育所需积温为1519.2度时。本文比 相似文献
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建立碳酸氢钠注射液中乙二胺四乙酸二钠的高效液相色谱测定方法。采用葡聚糖凝胶G-10色谱柱,以水为流动相,用高效液相色谱法测定碳酸氢钠注射液中乙二胺四乙酸二钠的含量。乙二胺四乙酸二钠的质量在0.1758~17.58μg的范围内与色谱峰面积线性关系良好,相关系数为0.9991,乙二胺四乙酸二钠的检出限为6.31μg/L。测定结果的相对标准偏差为0.89%(n=6),加标回收率为97.2%。该方法操作简单、准确、重现性好,可有效地控制碳酸氢钠注射液的质量。 相似文献
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A novel chiral stationary phase (CSP) for HPLC was prepared by bonding (R)-1-phenyl-2-(4-methylphenyl)ethylamine amide derivative of (S)-valine to aminopropyl silica gel through a 2-amino-3,5-dinitro-1-carboxamido-benzene unit. The CSP was used for the separation of some amino acid derivatives and pyrethroid insecticides by chiral HPLC. Satisfactory baseline separation required optimization of the variables of mobile phase composition. Use of dichloromethane as modifier in the mobile phase gave baseline separations of amino acid derivatives. The two enantiomers of fenpropathrin and four stereoisomers of fenvalerate were baseline separated using hexane-dichloromethane-ethanol as mobile phase. The results show that the enantioselectivity of the new CSP is better than Pirkle type 1-A column for these compounds. Only partial separations were observed for the stereoisomers of cypermethrin and cyfluthrin, which gave even and eight peaks, respectively. 相似文献
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A full-parallax three-dimensional(3D) display using a new directional diffuser is demonstrated.The display could present 3D images with 45 views comprising 9 horizontal views by 5 vertical views.The resolution and size of the 3D images displayed are 226×226 pixels and 300×300(mm).The new directional diffuser consisting of two perpendicular lenticular sheets can be widely used in the display domain owing to its low cost and simple process. 相似文献
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Guorong Sheng Shicong Ma Songlin Bai Jing Qian Kai Huang Bo Lang Ping Lu Yanguang Wang 《Tetrahedron》2018,74(17):2151-2157
The rhodium-catalyzed reactions of 3-diazoindolin-2-imines with β-enamino esters furnished 2,3-diaminoindoles in excellent yields with wide functional group tolerance. The synthesized 2,3-diaminoindoles could be converted into 5H-pyrazino [2,3-b]indoles via a sequential dehydrogenation/6π-ERC/aromatization process. 相似文献
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Du F Luo X Jiang G Hou S Liu G Ren L Zhang L Huang Q Jie N 《Analytical and bioanalytical chemistry》2007,388(2):489-493
Analysis of triadimenol was carried out using deoxyribonucleic acids (DNA) via the resonance light scattering (RLS) technique.
After adding triadimenol into aqueous medium of pH 1.72, the RLS of DNA was remarkably quenched. A resonance light scattering
peak at 310 nm was found, and the quenched intensity of RLS at this wavelength was proportional to the concentration of triadimenol.
The linear range of the calibration curve was approximately 0–3 μg mL−1 with a detection limit (S/N = 3) of 0.07 μg mL−1. The triadimenol in samples of water, cucumber and human serum was determined. The results were satisfactory, and the recovery
rates were in the range of 96.3–106.0%, 94.8–105.9% and 92.3–100.5%, respectively. The interaction mechanism was also studied. 相似文献