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Optimizing and adjusting the photoluminescence of Mn <sup>4+</sup> -doped fluoride phosphors <i>via</i> forming composite particles
摘要： The occurrence of para-chloronitrobenzene (PCNB) in the environment due to increased agricultural and economic activities worldwide has raised serious concerns to human health and various environmental agencies, thus the qualitative and quantitative detection of PCNB is of great significance. In this work, a novel three-dimensional nanohybrid composed of carbon nanohorns and carbon nanotubes (CNHs-CNTs) was prepared via a simple ultrasonication process, and then, the obtained CNHs-CNTs nanohybrids were used to modify electrode for the electrochemical sensing of PCNB. Under the optimized conditions, the result showed that the CNHs-CNTs nanohybrids could exhibit electrochemical sensing performances toward PCNB detection due to the synergetic properties from CNHs and CNTs, and a wide linear range from 0.1 to 70.0 μM coupled with a low detection limit of 5.9 nM were obtained for the determination of PCNB. Finally, the developed method was successfully applied in the determination of PCNB in real water samples.
关键词： carbon nanotubes,carbon nanohorns,Electrochemical sensor,para-nitro chlorobenzene.
更新于2025-09-19 17:15:36
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Features of molecular light scattering and structure of the chlorobenzene–o-dichlorobenzene solutions
摘要： The total light scattering coefficient, degree of depolarization, refractive index, and density were measured in chlorobenzene–o-dichlorobenzene solutions. The isotropic and anisotropic molecular light scattering intensities, isothermal compressibility, excess isothermal compressibility, molar volume, and excess molar volume were calculated. Complex nonmonotonic behavior of light scattering coefficients in response to the concentration change was found. A minimum of light scattering intensity in low concentration range at the chlorobenzene side and the maximum of light scattering intensity at the o-dichlorobenzene side were observed, which indicates a substantial rearrangement of solution local structure with a change in the concentration. Four ranges with different local structure of the solution were distinguished, namely, 0–0.03; 0.03–0.65; 0.65–0.9; and 0.9–1.0 according to analysis of light scattering coefficients, excess isothermal compressibility, and excess molar volume. The solution local structure was described in each range.
关键词： Structure of liquid solutions,Chlorobenzene–o-dichlorobenzene solutions,Microheterogeneity,Isothermal compressibility,Molecular light scattering,Agglomerates
更新于2025-09-19 17:15:36
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Enhanced effect of 1,2-dichlorobenzene on the property of PC61BM and perovskite films for planar heterojunction perovskite solar cells
摘要： PC61BM used as a common electron selective material has been widely discussed in previous articles. However, the inferior film coverage of PC61BM using chlorobenzene (CB) solvent still restricts the photoelectric property of the perovskite solar cells (PSCs). In this paper, the effect of 1,2-dichlorobenzene (o-DCB) used as the solvent of PC61BM precursor is investigated in order to get an efficient method to fabricated high-quality PC61BM layer which is crucial for low-temperature PSCs. Furthermore, the morphologies of diverse PC61BM layers using CB and o-DCB solvents and the properties of perovskite films deposited on different PC61BM substrates are studied. For the performance of PSCs based on the PC61BM layers fabricated by CB and o-DCB, the optimal PC61BM concentrations in precursor are 15 mg/mL and 20 mg/mL, respectively. In all samples, the champion PSCs based on 20 mg/mL PC61BM layer using o-DCB with the structure of fluorine-doped tin oxide (FTO) substrate/compact TiO2/ PC61BM/FAxMA1-xPbIyBrzCl3-y-z/2,2',7,7'-tetrakis- (N,N-di-p-methoxyphenylamine) -9,9'-spirobifluorene (Spiro-OMeTAD)/Au are prepared. It has achieved a power conversion efficiency (PCE) of 16.17% compared with that from the sample without PC61BM layer (8.34%) and the device with 15 mg/mL PC61BM layer using CB solvent (14.03%). We anticipate that the introduction of o-DCB would possibly become a promising method for high efficient PSCs in the future.
关键词： PC61BM,chlorobenzene,perovskite solar cells,1,2-dichlorobenzene
更新于2025-09-12 10:27:22