印度兰的合成与应用

本文介绍了一种新型的酞菁钴染料印度兰的合成机理、工艺流程、检测方法及其产品的应用,并介绍了国内印度兰的发展现状和市场需求。     

Enhanced structural,optical, and photocatalytic activity of novel Cd–Zn co-doped Mg0.25 Fe1.75O4 for degradation of RhB dye under visible light irradiation

Cd_xZn_1-xMg_0.25Fe_1.75O₄ (where x = 0.00, 0.25, 0.50, 0.75, 1.00) have been successfully produced by a facile hydrothermal technique for a thorough comparison of structural, optical, and photocatalytic properties (degradation of Rhodamine B -RhB dye under visible light irradiation). X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM) confirmed the formation of cubic spinel structure for all of the samples. Fourier transform infrared (FTIR) spectroscopy verified the presence of metal-oxygen (M–O) bonding in the prepared samples with two frequency bands corresponding to phonon vibrational stretching in both the octahedral and tetrahedral lattice positions. UV–Visible Spectrophotometer and photoluminescence (PL) spectroscopy investigated the bandgap variation (2.7 eV-1.7 eV) and emission spectrum peaks appearing in the range of 405–471 nm region. The comparison in the photo-degradation of Rhodamine B (RhB) revealed the superior performance (98% degradation of RhB dye in 80 min having a K value of 0.04966 with excellent reusability) of Cd_0.50Zn_0.50Mg_0.25Fe_1.75O₄ sample having 50/50 dopant ratio of Cd and Zn in the parent Mg Ferrite, attributed to the lowest bandgap, longer lifetime of charge carriers, active octahedral lattice site, electron/hole pair recombination preventions, and the least value of ohmic impedance at higher frequency.     

Understanding the Electronic Structures and Absorption Properties of Porphyrin Sensitizers YD2 and YD2-o-C8 for Dye-Sensitized Solar Cells

The electronic structures and excitation properties of dye sensitizers determine the photon-to-current conversion efficiency of dye sensitized solar cells (DSSCs). In order to understand the different performance of porphyrin dye sensitizers YD2 and YD2-o-C8 in DSSC, their geometries and electronic structures have been studied using density functional theory (DFT), and the electronic absorption properties have been investigated via time-dependent DFT (TDDFT) with polarizable continuum model for solvent effects. The geometrical parameters indicate that YD2 and YD2-o-C8 have similar conjugate length and charge transfer (CT) distance. According to the experimental spectra, the HSE06 functional in TDDFT is the most suitable functional for describing the Q and B absorption bands of porphyrins. The transition configurations and molecular orbital analysis suggest that the diarylamino groups are major chromophores for effective CT excitations (ECTE), and therefore act as electron donor in photon-induced electron injection in DSSCs. The analysis of excited states properties and the free energy changes for electron injection support that the better performance of YD2-o-C8 in DSSCs result from the more excited states with ECTE character and the larger absolute value of free energy change for electron injection.     

Rapid Removal of Dyes by Carbonized Sludge: Process,Effects of Environmental Factors,and Mechanism

The disposal of sewage sludge is one of the most pressing environmental issues with increasing amount of sewage sludge. Among these methods, carbonized sludge is thought to be a potential approach for resource utilization and becomes one of the most widely used adsorbent for wastewater treatment. However, effects of environmental factors and its relative mechanism for pollutant removal have not been thoroughly studied. In this study, carbonized sludge derived from sewage sludge was investigated. The adsorption of C. I. Acid Red 73 (AR 73) on the carbonized sludge was a rapid process and fit well to the Langmuir model with a maximum adsorption capacity of 137.95 mg g^?1 at pH 6.8. In addition, the common coexisting ions had a negligible negative impact on dye adsorption on the carbonized sludge. The magnetic carbonized sludge also exhibited high adsorption efficiency for other anionic dyes. Furthermore, the adsorption mechanism was proposed by analysis Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS), high surface area, and proper porous structure as well as the π-π interaction between dye molecules and the graphene carbon surface were likely be the mechanisms of dye adsorption. Overall, the results reported herein indicated that carbonized sludge is very attractive and implies a potential of practical application for dyeing effluent treatment.     

Application of an enzyme immunoassay for the quantitative determination of azo dye (Orange II) in food products

This paper reports the preparation of polyclonal antibodies against a synthetic azo dye, Orange II, and the development of an indirect ELISA to detect Orange II in foods. The sulfonic group of Orange II was modified and linked with carrier protein to synthesise an artificial antigen. Based on the checkerboard titration, the method showed excellent sensitivity (IC₅₀?=?0.61 ng?g^?1) to Orange II in the linear range of 0.05–10?ng?g^?1. The antibody had little cross-reactivity with Chromotrope FB, Gardenia Yellow, Ponceau 4R, Sunset Yellow and Sudan dyes. The ELISA had limits of detection (LOD) of 0.22, 0.97 and 0.74?ng?g^?1 in chilli powder, chilli oil and braised pork, respectively. The limits of quantification (LOQ) of the assay were 0.91?ng?g^?1 in chilli powder, 1.48?ng?g^?1 in chilli oil and 1.10?ng?g^?1 in braised pork. For food products fortified with 1–10?ng?g^?1 Orange II, the inter- and intra-assay variations were all less than 24.0% and 18.0%, respectively. Therefore, the proposed test could be used as a rapid screening method for Orange II detection in food samples.     

高效液相色谱-质谱法同时测定染发剂中33种禁限用染料

建立了高效液相色谱-质谱(HPLC-MS/MS)同时测定染发剂中33种禁限用染料的方法。样品用甲醇和2 g/L抗坏血酸水溶液的混合溶液溶解,正己烷净化,以5 mmol/L的乙酸铵水溶液和乙腈为流动相进行梯度洗脱,经Agilent ZORBAX Extend C18柱(2.1 mm×100 mm,1.8μm)分离。在电喷雾离子模式下,采用多重反应监测模式(MRM)进行定性和定量分析。33种染料在相应的质量浓度范围内线性关系良好,线性相关系数均大于0.99,检出限为0.01~29.5 mg/kg,回收率为71%~115%。     

媒介黑P2B染料在羊毛纤维染色中的应用

本文主要介绍了运用媒介黑P2B在羊毛纤维上获得纯正、浓黑的色泽的方法。摸索出的羊毛染色工艺能很好地指导实际生产。     

Optimisation of concentration of ingredients for simultaneous dyeing and finishing using response surface methodology

In the present study, simultaneous reactive dyeing and easy care finishing of cotton with a non-formaldehyde and environment-friendly compound (citric acid [CA]) was successfully optimised using a statistical model. An optimised recipe was formulated based on the half factorial central composite design and numerical optimisation solution by Design-Expert 6.0 software. The optimised conditions were investigated for the concentration of CA, catalyst, reactive dye, alkali and urea. Evaluation of the recipe was made with respect to K/S, percent fixation of reactive dye, dry crease recovery angle and tensile strength. The simultaneous dyeing and finishing using theoretical optimised recipe was carried out and performance of the sample was compared with the sample using conventional two-step dyeing and finishing process.     

硫化染料灯芯绒轧染工艺探讨

硫化染料以其深浓的色泽、低廉的价格成为灯芯绒染色的常用染料，但由于染料颗粒大小、溶解性、水量等因素，尚存在色差。采用初开车冲淡可达到平衡，克服色差，经过实践有很高的经济效益。     

提高粗纺低特羊绒色纱强度的研究

针对不同原绒用相同染料和相同原绒用不同染料染色后纺制的相同特数、相同颜色羊绒色纱，研究其纤维性能及染色性能对纱线强度的影响，旨在提高粗纺低特羊绒色纱的强度．