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Pr-doped Cu2O films were deposited on Cu sheet substrates by hydrothermal method with different doping concentrations of Pr(NO3)3. The result shows that undoped and Pr-doped Cu2O thin films are all p-type semiconductors. Compared with undoped Cu2O, the photovoltage, photocurrent density, and carrier concentration of Pr-doped Cu2O increase to 0.4401 V, 1.1 mA/cm2, and 9.66 × 1019 cm−3, respectively. And the increments are 0.0828 V, 0.52 mA/cm2, and 8.931 × 1019 cm−3, respectively. The increments of the capacitances of Pr doping modification illustrate that Pr element has a strong passivation effect on the composite of electrons and holes, thus improving the photoelectric performance of Cu2O. The preferential growth surface of Pr-doped Cu2O film is (111) and (200), and the crystallinity of (111) plane is optimal. After doping modification, the grain size of Pr-doped Cu2O is increased and the particle size is relatively uniform. The mass percentage of Pr element is 0.46% and the forbidden band width reduces from 2.02 to 1.83 eV. XPS peak fitting of Pr-doped Cu2O indicates that Pr element is doped into Cu2O film.

F-doped Cu2O films were deposited on Cu sheet substrates by hydrothermal method with different doping concentrations of F−. The structure, morphology, composition and forbidden bandwidth of the samples were characterized by XRD, SEM, EDS, UV–Vis and XPS. The photoelectric properties, capacitance-voltage and AC impedance characteristics were also studied. The undoped and F-doped Cu2O thin films are all p-type semiconductors. When the doping concentration of F− is 0.002 mol/L, the preferential growth surfaces are (110), (111) and (200), and the crystallinity of (111) plane is optimal. After doping, the grain size of F-doped Cu2O is relatively uniform. The mass percentage of F element is 0.34% and the forbidden bandwidth reduces from 1.96 eV to 1.91 eV. Photovoltage and photocurrent density increase to 0.4457 V and 2.79 mA/cm2, respectively. And the carrier concentration increases from 4.55 × 1018 to 2.58 × 1022 cm−3. The resistance value under light reduces from 183.4 Ω to 55.8 Ω.

An new type of switch “On-Off” fluorescence probe was constructed based on fluorescence carbon dots as a novel strategy to analyze trace histidine(His) which was proposed for the first time. In water solution with pH 7.6, the fluorescence of CDs was quenched with Ru3+ due to the formation of ground state compound through electrostatic attraction, and the system was thus “turned-off”. The fluorescence intensity of CDs was “turned-on” due to the competition between His and Ru towards the surface of CDs. The effect of critical parameters including pH, buffer solutions, reaction temperature and time needed to grow the fluorescence intensity of CDs was studied. Results show thatin water solution with pH 7.6, and when the temperature was between 20~25 ℃, the fluorescence intensity of the released CDs displayed a linear relationship in the range of (6.5~219.3)×10-6 mol·L-1 of captopril. Lower limit of detection for His, at the signal-to-noise ratio of 3/(3δ), was 2.15×10-6 mol·L-1. The methodology was successfully applied for the determination of His in Compound Amino Acid Injections, with the RSD≤2.07%, and the recovery rate was between 95.7%～102.4%. The result of the experiment was satisfactory. On the one hand, the excellent optical character CDs was acted as “On-Off” fluorescence probe, which could be extent the application of CDs, on the other hand, the excellent performance of the proposed fluorescence probe shows that this method possesses the potential for practical application.

The LiFePO4/C cathode material was synthesized by two–step addition of dual carbon sources method based on the in situ polymerization method combining with two–step sintering process. In this study, the structure and morphology have been studied systematically by X–ray diffraction (XRD) and scanning electron microscope (SEM).The electrochemical performances have been shown by the charge/discharge capacity, rate property, cycle performance. It was evidenced that the two–step addition of dual carbon sources had remarkable advantages, including the more complete coating carbon, and the improvement in the electrochemical performance of LiFePO4/C.

Olivine structured LiFePO4 are prepared by sol-gel method from FePO4·H2O nanocrystallites, which are synthesized via in situ polymerization restriction technique. These composites are fully characterized using XRD, SEM, and the electrochemical performances have been shown by the charge/discharge capacity, rate property and cycle performance. The synthesized LiFePO4 samples show well-crystallized structures. Among those samples, the sample synthesized at 650°C presents the highest discharge capacity of 165.8 mAhg-1 at 0.2 C. This compares with a theoretical discharge capacity of 170 mAhg-1.

This paper presents a novel approach for preparing titanium dioxide nanotube arrays (TNTs) loaded with highly dispersed Br through an ultrasound aided photochemical route. The content of Br doped on the arrays was controlled by changing the concentration of NaBr and the ultrasound time. The Br doped TiO2nanotube arrays were characterized by SEM, XRD and UV–Vis spectrum. Doping the bromine did not basically affect the morphology of the surface of the TNTs, but part of the anatase phase transformed into rutile phase, which led to the formation of the mixed crystal and increased the photocatalytic activity. The results showed that Br doping significantly enhanced the photocatalytic degradation rate of titanium dioxide nanotube arrays under UV-light irradiation. The main factors which affected photocatalytic degradation of sugar wastewater were the illumination time and pH. The results showed that the longer the exposure time was, the initial pH of wastewater was more favorable to photocatalytic degradation of the sugar wastewater for the Br-TiO2nanotube arrays, and compared to undoped TiO2nanotube arrays Br doped TiO2nanotube arrays had better photocatalytic properties.

Reserpine antagonized systemic morphine analgesia as measured by tail-flick latency but the antagonism was surmountable by increasing the morphine dose. Reserpine had no effect on the intrathecal morphine analgesia while the analgesic action of intraventricular morphine was practically eliminated by reserpine.

The noradrenergic neurotoxin DSP4 was injected intrathecally into the lumbar spinal subarachnoid space of the rat. After 10 days, dose-response curves for tail-flick inhibition were determined for both intraperitoneal and intraventricular injections of morphine. In rats pretreated with DSP4, the analgesic effect of morphine given either intraventricularly or intraperitoneally was significantly attenuated. The noradrenaline and 5-hydroxytryptamine contents in the brain-stem and the spinal cord were also measured. Intrathecal DSP4 depleted noradrenaline in the spinal cord but not in the brain-stem. Neither brain-stem or spinal cord 5-hydroxytryptamine was affected by DSP4.