TEXTILE RESEARCH JOURNAL
·
2023
·
IF 2.3
Changcheng Zhang,Xiaoqiang Ma,Ting Pan,Yan Zhang,Huiyu Jiang,Jinbo Yao
Monodisperse poly (methyl acrylate-meth-acyloxy-ethyl trimethylammonium chloride) cationic nanospheres were synthesized by soap-free emulsion polymerization, and were subsequently combined with gardenia to prepare dye/nanospheres. The influence of the concentration of gardenia yellow, rate of vortexing, temperature and pH of mixing on the adsorption capacity and stability of microspheres were thoroughly investigated, and the prepared gardenia/poly (methyl acrylate-meth-acyloxy-ethyl trimethylammonium chloride) nanospheres acted as liquid pigments to dye the fabric substrates by the impregnation method. In particular, the photostability of gardenia/poly (methyl acrylate-meth-acyloxy-ethyl trimethylammonium chloride) and the reflection of its dyed fabrics are distinctly described, the comparison of the dyeing property effect between gardenia/poly (methyl acrylate-meth-acyloxy-ethyl trimethylammonium chloride) and gardenia yellow dyed by mordant dyeing were analyzed. According to the experimental findings, the dyestuff nanospheres have high stability when the pH is 7–8, the mass ratio of gardenia yellow to poly (methyl acrylate-meth-acyloxy-ethyl trimethylammonium chloride) nanospheres was 12.8:1, the temperature was 60°C for 30 min, and the mixing speed was 500 rpm. Dyeing cotton fabrics with gardenia/poly (methyl acrylate-meth-acyloxy-ethyl trimethylammonium chloride) produced higher color strength and color fastness than the gardenia yellow with mordant dyeing.
研究领域:
材料科学
·
纺织工程
·
染整技术
✓ 已验证
DOI
高影响因子
Nanoscale
·
2011
·Vol. 4
·期 2
·455-460
·
IF 4.109
Bo Jiang,Peng Zhang,Ya Zhang,Ling Wu,Hexing Li,Dieqing Zhang,Guisheng Li
A new hierarchical visible-light-driven photocatalyst Bi2TiO4F2 was synthesized by a solvothermal method for the first time. The photocatalyst was characterized by X-ray powder diffraction (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), N2 adsorption–desorption (BET), UV-vis diffuse reflectance spectroscopy (DRS). Such hierarchical Bi2TiO4F2 microspheres assembled by nanosheets were fabricated via an Ostwald ripening process in the absence of soft templates (surfactants). The as-prepared samples’ bimodal pore-size distributions in the mesoporous region consisted of smaller intra-aggregated pores with peak pore diameter of ca. 4.6 nm and larger inter-aggregated pores with peak pore diameter of ca. 17.0 nm. The band gap of the obtained Bi2TiO4F2 was estimated to be about 2.71–3.06 eV for various solvothermal treatment time. Owing to the hierarchical structure with bimodal pores, low band gaps and high crystallinity, the Bi2TiO4F2 microspheres exhibited high photocatalytic performance and durability for the degradation of rhodamine B (RhB) under visible light (> 420 nm). It was proved that the photo-generated holes and ˙OH radicals played an essential role for the oxidation of RhB.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
Journal of Biobased Materials and Bioenergy
·
2021
·Vol. 15
·期 4
·514-520
·
IF 0.708
Wang Xiaobin
The penetration depth of light into wheat flour is the basis for the effective detection of additives in wheat flour using hyperspectral imaging. To determine the effective penetration depth of light into different gluten flours in hyperspectral image collection, the partial least squares-discriminant
analysis (PLS-DA) method was used. Double-layer samples were prepared by placing flour layers with different thicknesses on top of the benzoyl peroxide (BPO) layer. PLS-DA classification model was established by using the diffuse reflectance spectra of each pixel in the double-layer sample
image, and the classification accuracy was used to evaluate the results. The results show that the average accuracy of 1 and 1.5 mm models after smoothing pretreatment is above 95%. Therefore, a 1.5 mm sample depth for the detection of mixed samples of flour and additives is recommended. The
selected sample depth was used for the detection of mixed samples containing different concentrations of BPO in flour, and the percentage of detected BPO pixels was positively correlated with BPO concentration, which could be used for subsequent quantitative analysis. The results lay a foundation
for the effective detection additives in wheat flour by using hyperspectral imaging technology.
研究领域:
食品科学
·
光谱学
✓ 已验证
DOI
高影响因子
MOLECULES
·
2021
·Vol. 26
·期 13
·4079
·
IF 4.412
Gaozhan Xie,Jiangchao Wang,Yang Cao,Xudong Xue,Xiao Zhang,Chang Liu,Huanhuan Li,Ye Tao,Runfeng Chen
Three phosphine sulfide-based bipolar host materials,vizCzPhPS,DCzPhPS, andTCzPhPS, were facilely prepared through a one-pot synthesis in excellent yields. The developed hosts exhibit superior thermal stabilities with the decomposition temperatures (Td) all exceeding 350 °C and the melting temperatures (Tm) over 200 °C. In addition, their triplet energy (ET) levels are estimated to be higher than 3.0 eV, illustrating that they are applicable to serve as hosts for blue phosphorescent organic light-emitting diodes (PhOLEDs). The maxima luminance, current efficiency (CE), power efficiency (PE), and external quantum efficiency (EQE) of 17,223 cd m−2, 36.7 cd A−1, 37.5 lm W−1, and 17.5% are achieved for the blue PhOLEDs hosted byCzPhPS. The PhOLEDs based onDCzPhPSandTCzPhPSshow inferior device performance than that ofCzPhPS, which might be ascribed to the deteriorated charge transporting balance as the increased number of the constructed carbazole units inDCzPhPSandTCzPhPSmolecules would enhance the hole-transporting ability of the devices to a large extent. Our study demonstrates that the bipolar hosts derived from phosphine sulfide have enormous potential applications in blue PhOLEDs, and the quantity of donors should be well controlled to exploit highly efficient phosphine sulfide-based hosts.Keywords:bipolar host material;phosphorescent organic light-emitting diode;phosphine sulfide;carbazole;triplet energy level
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF APPLIED PHYSICS
·
2017
·Vol. 122
·期 17
·
IF 2.068
Tong Liping,Saito Katsuhiko,Guo Qixin,Zhou Han,Fan Tongxiang,Zhang Di
Visible-light-activated near-infrared luminescent materials are promising photoluminescent materials due to their convenience and low cost. Crystal defects can seriously affect the performance of luminescent materials, and better understanding of the complexity of the structural disorder and electronic structures of such materials opens up new possibilities in luminescent material development. In this work, we successfully design a novel, effective, visible-light-activated near-infrared luminescent Gd 3 Ga 5 O 12 : 4.2%Yb 3+ , 8.4%Er 3+ , and 4.2%Bi 3+ system based on first principles. This exhibits strong emission intensity and high luminous efficiency (0.993) and also has a lifetime (7.002 ms) that is at least twice as long as the longest lifetime reported in published papers. We utilize density functional theory with an effective LSDA + U method to study the structural properties of Gd 3− x − y − z Ga 5 O 12 : x Yb 3+ , y Bi 3+ , z Er 3+ (GGG: Yb 3+ , Bi 3+ , Er 3+ ). The d and f electron orbits of rare-earth ions are considered for an effective Hund exchange. Detailed analysis reveals that GGG: 4.2%Yb 3+ , 8.4%Er 3+ , 4.2%Bi 3+ has the smallest cell volume because of the strong covalent bonds of Bi–O, Er–O, and Yb–O. Bi 3d is a hybridized state that acts as sensitizing ions during the process of luminescence in GGG: Yb 3+ , Bi 3+ , Er 3+ . Together with experimental and theoretical results, we analyze the influence of defects on emission intensity. The locations of Yb 3+ , Er 3+ , and Bi 3+ are determined by X-ray absorption fine structure measurements, which are in agreement with the model constructed using first principles. This work may provide innovative guidance for the design of high-performance visible-light-activated near-infrared luminophores based on calculations and a new methodology for application of coherent laser radar and optical communication.
研究领域:
材料科学
·
光学
·
物理学
✓ 已验证
DOI
高影响因子
ChemSusChem
·
2022
·Vol. 15
·期 21
·e202201473
·
IF 9.14
Rundong Fan,Yizeng Wu,Haipeng Xie,Yongli Gao,Lina Wang,Bo Zhao,Dong Li,Shaocheng Liu,Yu Zhang,Hua Kong,Yujing Li,Qi Chen,Anyuan Cao,Huanping Zhou
Graphical Hybrid theory : A hybrid perovskite material, 4,4’-ethylenedipyridinium lead bromide, is assembled onto carbon material to function as photoelectrode of the Li-oxygen battery, leading to a reduced overpotential of 0.5 V compared to the Li-oxygen battery without illumination (1.3 V). The overpotential can be maintained lower than 0.9 V after cycling for 170 h. Organic-inorganic hybrid perovskites have emerged in the last decade as promising semiconductors due to the excellent optoelectronic properties. This kind of perovskites exhibited respectable photocatalytic activities toward potential application in battery; however, the instability issue still hindered their practical use. Herein, a hybrid perovskite material, 4,4’-ethylenedipyridinium lead bromide [(4,4’-EDP)Pb 2 Br 6 ], was assembled onto the carbon materials to function as photoelectrode of the Li-oxygen battery. The strong cation-π interactions between the A-site cations enabled this hybrid perovskite to endure the cycling process as well as the exposure to battery electrolyte and oxygen. Benefitting from the photo-generated carriers of the photoelectrode under illumination, the formation/decomposition of the discharge product was accelerated, thus leading to a reduced overpotential from 1.3 V to an optimized 0.5 V compared to the Li-oxygen battery without illumination. The overpotential could be maintained lower than 0.9 V after cycling for 170 h. Furthermore, when exposed to the sunlight, the charging voltage was reduced by over 0.2 V. The intrinsic stability and strong light absorption of perovskites together with the optimized perovskite/carbon cathode interfaces contributed to the improved performance under different light sources without complex material design, which shed light on the exploration of organic-inorganic hybrid perovskites in Li-oxygen battery applications.
研究领域:
能源存储
·
材料科学
·
光化学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
Advanced Optical Materials
·
2019
·Vol. 7
·期 24
·1901335
·
IF 7.125
Guojun Zhou,Mingze Li,Jing Zhao,Maxim S. Molokeev,Zhiguo Xia
With single-component photoinduced white-light (WL) emission, low-dimensional hybrid halide perovskites have emerged as a new generation of luminescent materials; however, the effect of halogens on the intrinsic light emissions and the corresponding mechanisms is still unknown. Herein, the investigation of a family of two-dimensional (2D) hybrid perovskites R 2 PbBr 4− x Cl x ( R = BA + , PMA + , PEA + ; x = 0, 1, 2, 3, 4) highlights the influence of halogens on intrinsic emission to reveal the dependence of the photoluminescence on the nature and contribution of the halogens. Ultrabroad emissions covering the entire visible-light region are achieved in the halogen hybrid systems with the stoichiometry of R 2 PbBr 2 Cl 2 ( R = BA + , PMA + , PEA + ), showing their potential as single-component WL phosphors in solid-state lighting devices. The origin of the WL emissions is the synergistic recombination emission of free excitons and self-trapped excitons. The ratio of halogens (Br/Cl) is confirmed to be a critical factor to fine-tune the intrinsic emission properties. This work provides a feasible strategy to achieve single-component WL emission in 2D hybrid perovskites, and proposes a method for regulating halogen contents for optimizing luminescent properties.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
ACS Biomaterials Science & Engineering
·
2020
·
IF 4.152
Xiaojun Long,Yang Yi,Xiaozhao Wang,Xiyue Duan,Yuan Sun,Chengwei Wu,Wenjian Weng,Boyong Xu,Kui Cheng,Huiming Wang,Jun Lin
Light-induced cell harvest shows much potential in in vitro cell culture. In this work, a light-responsive monolayer graphene (Gr)/titanium dioxide nanodot (TN) film is designed and used for light-induced cell harvest. It is found that after 20 min of 365 nm UV or 450 nm visible light illumination, different types of cells could be detached from the surface effectively. The highest cell detachment ratio reaches about 95%. The mechanism of such a cell detachment is contributed to light illumination generates charge accumulation, which, in turn, changes the conformation of the extracellular matrix protein molecules adsorbed to a more disordered state, and eventually leads to the cells detachment. Such UV and visible light responsive Gr/TiO2 film could be a good candidate for a surface with light-induced cell detachment property.
研究领域:
生物材料学
·
细胞生物学
✓ 已验证
DOI
高影响因子
Journal of Saudi Chemical Society
·
2015
·
IF 2.523
Lijie Wang,Xi Zhang,Peng Zhang,Zetan Cao,Junhua Hu
Mn doped TiO 2 was synthesized by hydrothermal treatment of titanium boride and manganese chloride. The doped nano powders were fabricated by adding ammonium water into the mother solution which was obtained hydrothermally. The calcination of precursory powders took place at the temperature of 400–600 °C which resulted in the formation of anatase with a small amount of rutile phase. The shift of valence band maximum (VBM) toward the lower binding energies was observed by measuring the position of VBM with reference to the Fermi level, which contributed to the significant red-shift of absorption edges. X-ray photoelectron spectroscopy (XPS) measurement shows that manganese exists in both 4+ and 3+ valance states, which may have a temperate replacing of Ti 4+ because of the charge compensation compared with 2+ and 3+ valence states. The property of photoelectric conversion was detected by evaluating the photocurrent under visible light (>420 nm), and the fluorescence spectra also proved that 6%-Mn doped TiO 2 (DM6) shows a better photoelectric conversion performance.
研究领域:
材料科学
·
光催化
✓ 已验证
DOI
高影响因子
DALTON TRANSACTIONS
·
2021
·Vol. 50
·期 28
·9804-9811
·
IF 4.39
Zexin Li,Fenglei Sun,Haining Song,Haifeng Zhou,Yifei zhou,Zhenlei Yuan,Peng Guo,Guangjun Zhou,Qianqian Zhuang,Xiaoqiang Yu
Lead-free double perovskite has attracted widespread attention due to its good stability and non-toxicity. In this work, Cs2AgxNa1−xInCl6 quantum dots were synthesized via a thermal injection method using non-toxic precursors. Based on the wide spectrum of self-bound excitons, the quantum dots achieved white light emission. Bi-doped Cs2AgxNa1−xInCl6 quantum dots with excellent luminescence performance have the same cubic structure, and they have a larger Stokes shift. The cubic perovskite space group is Fmm, and [NaCl6], [AgCl6] and [InCl6] octahedrons alternately appear in the cubic structure. The photoluminescence quantum yield of Cs2AgxNa1−xInCl6 is improved by doping with a small amount of Bi; the PL QY increased to 57.3% with an obvious emission peak at 600 nm. The stability and luminescence intensity of perovskite QDs were further enhanced by SiO2 coating and a Cs2AgxNa1−xInCl6:Bi-SiO2 thin film was prepared using perhydropolysilazane as the precursor. The materials have huge application potential in the field of white light emission and display.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
Materials Science and Engineering B-Advanced Functional Solid-State Materials
·
2017
·
IF 2.552
Yanxiang Zhang,Juan Wu,Yangyang Deng,Yanjun Xin,Huiling Liu,Dong Ma,Nan Bao
Ag/GO/g-C 3 N 4 composites were successfully synthesized by a sonochemical method. The structure and properties of the composites at various Ag loadings were characterized, and the Ag nanoparticles were confirmed by XRD, TEM and XPS measurements. UV–Vis diffuse reflectance spectra showed the presence of surface plasmon peak for Ag at 550 nm. The Ag/GO/g-C 3 N 4 composites demonstrated excellent activity in photocatalytic degradation of Rh B under visible light irradiation, and 5% of Ag nanoparticle was found to be the most suitable loading. The enhanced photocatalytic activity was ascribed to the role of GO nanosheets and Ag nanoparticles. The GO nanosheets acted as electrons transporter and acceptor in the composite and inhibited the charge recombination. The Ag nanoparticles acted as an electron traps to facilitate the separation of photogenerated electron-hole pairs and promoted interfacial electrons transfer. The OH ads and h + were the major radicals to be involved in the photocatalytic process.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
TEXTILE RESEARCH JOURNAL
·
2023
·
IF 2.3
Liang Jin,Tao Qian,Yujun Cheng,Dongming Qi,John H. Xin,Gang Xia,Zhihua Cui
Dye wastewater has attracted great attention due to high pollution and toxicity which can cause harm to the living environment. It is common for azo-disperse dyes to be used to dye hydrophobic fibers. A reduction clearing method is used to eliminate the dye particles on the fabric after dyeing. However, when azo disperse dyes on the fiber surface are eliminated by the reduction clearing process, this can give rise to an effluent discharge due to the presence of sodium hydrosulfite. The introduction of carboxylic ester groups into dye molecules can effectively avoid this issue. Six novel environmentally friendly alkali-clearable disperse dyes, containing cyano and carboxylic ester groups, were readily synthesized by a diazo coupling reaction with various diazo components. Their dyeing properties on polyethylene terephthalate fabrics were respectively measured and compared with those of commercial reference dyes. It was indicated that some fastness properties of the synthesized dyes on polyethylene terephthalate fabrics after the alkali clearing were improved compared with those of the reference dyes due to the existence of the carboxylic ester group. Moreover, the chromaticity of dye wastewater can be further reduced by recovering hydrolyzed dyes.
研究领域:
染料化学
·
环境科学
·
纺织材料学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）