SPECTROSCOPY LETTERS
·
2025
·
IF 1.6
Na Ni,Yanhua Tang,Nian Ding,Kang Peng,Xinwang Zhang,Qianqian Su
This study used the acidic anionic dye eosin Y (EY) as a resonance Rayleigh scattering (RRS) probe to develop a method for the detection of doxorubicin hydrochloride (DOX). In dilute hydrochloric acid solution medium, eosin Y interacted with each other through hydrogen bonding to form supramolecular aggregates. The addition of doxorubicin hydrochloride induced an ion-conjugation process and dissociated the hydrogen-bonded supramolecular aggregates that eosin Y had formed. As a result, the RRS signal of eosin Y at 534 nm was significantly diminished. The reaction conditions were optimized and the mechanism of RRS intensity reduction was explored. It was found that the main reason for the weakening of the RRS intensity was the decrease in particle size. The range of 0.5–5.0 mg/L is well-represented by the concentration of doxorubicin hydrochloride, which shows decent linear relationship. The linear regression equation was ΔI = 15044c + 10465 with a correlation coefficient R of 0.9995, and a limit of detection of 0.085 mg/L. The recoveries ranged from 97.33% to 102.94%. This work provided a new, sensitive, and cost-effective method for estimating doxorubicin hydrochloride, which can be successfully applied to the estimation of doxorubicin hydrochloride for injection.
研究领域:
分析化学
·
药物分析
·
光谱学
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2024
·Vol. 14
·期 6
·512
·
IF 4.4
Yuan Chen,Jiaxing Wang,Daidi Chen,Boxi Wang,Jinchuan Wu,Rongrong Liu,Qingxin Li
Many studies have been conducted on the microbial reduction of Pd (II) to palladium nanoparticles (Pd-NPs) due to the environmental friendliness, low cost, and the decreased toxicity of Pd (II) ions. In this study, we investigate the reduction mechanism of Pd (II) byBacillus megateriumY-4 through proteomics. The data are available via ProteomeXchange with identifier PXD049711. Our results revealed thatB. megateriumY-4 may use the endogenous electron donor (NAD(P)H) generated by nirB, tdh, and fabG and reductase to reduce Pd (II) to Pd-NPs. The expression levels of fabG, tdh, gudB, and rocG that generate NAD(P)H were further increased, and the number of reduced Pd-NPs was further increased with the exogenous electron donor sodium formate. Endogenous electron mediators such as quinones and flavins inB. megateriumY-4 can further enhance Pd (II) reduction. The findings provided invaluable information regarding the reduction mechanism of Pd (II) byB. megateriumY-4 at the proteome level.
研究领域:
微生物学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FUEL
·
2024
·
IF 6.7
Ji Xu,Yuxin Wen,Dekang Li,Shuo Zhang,Zhen Han,Haoquan Hu,Lijun Jin
Pyrolysis as one of the most utilizations of biomass has aroused the increasing attention, however, the key is to upgrade biomass pyrolysis volatiles and enrich the high-valued chemicals in bio-oil. In this paper, different metal oxide-modified Y zeolites, including Fe/Y, Co/Y, Ni/Y, Mg/Y and Zn/Y, were prepared by wet impregnation and employed in catalytic upgrading of pyrolytic volatiles from rice straw (RS) and poplar sawdust (PS). Results showed that the modification by metal oxides led to the decrease of surface area and the changes in the acidity of zeolites. Higher yields of gas and water were obtained over metal oxide-modified zeolites at the expense of the bio-oil yields. More strong acid sites of the Ni/Y and Zn/Y catalysts promoted the generation of H 2 . Fe/Y catalyst showed good selectivity to aromatics in bio-oil owing to high mesoporous volume and strong deoxidization capacity. The highest aromatic hydrocarbons content (63.0%) was obtained over Fe/Y in RS bio-oil. The formation of phenol and cresol was promoted with increasing the ratio of Lewis/Brönsted acid. Under the action of Ni/Y with the highest Lewis/Brönsted ratio, the phenol content in bio-oil from RS and PS pyrolysis was enhanced to 11.8% and 25.3%, respectively. The Fe/Y catalyst had good upgrading performance during three reaction-regeneration cycles. In addition, the possible reaction mechanism of biomass pyrolysis volatiles over metal oxide-modified Y zeolites was proposed. This work will provide a guide for the composition regulation of bio-oil from biomass pyrolysis.
研究领域:
能源与燃料
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
Catalysis Science & Technology
·
2022
·Vol. 12
·期 15
·4837-4850
·
IF 6.177
Haoyi Lin,Jiaxing Zhang,Qingxu Duan,Kaixuan Yang,Weiping Liao,Shixue Qi,Hongying Lü,Zhiguo Zhu
Plentiful heteroatom-containing zeolites as versatile redox catalysts have been successfully post-synthesized via the top-down methodology, where the starting aluminosilicate zeolites are normally expected to be highly dealuminated to maximize the amounts of silanol nests and occasionally to evade the detrimental effect of framework Al ions on the catalytic performance. Herein, our proposed dealumination-controlled strategy for the synthesis of hierarchical Ti–Y zeolite breaks through this concept. Framework-substituted Ti and tri-coordinated Al species were afforded from the interaction of Ti ions with dealumination-derived silanol nests and from the process of acid treatment, respectively. Structure–function relationships revealed that Lewis acid sites were the catalytically active centres of Ti–Y zeolite in oxidative desulfurization with hydrogen peroxide as the oxidant, which came from the cooperative effect of dual active sites containing framework-substituted Ti and tri-coordinated Al species. The amounts of Lewis acid sites demonstrated a volcanic-type trend as the acid-treatment time increases. The reusability, regeneration ability, deactivation mechanism were also systematically investigated in oxidative desulfurization. Thus the Ti–Y zeolite catalyst was also effective for Baeyer–Villiger oxidation of 2-adamantanone. This work discloses the effectiveness of preparing an efficient Ti–Y zeolite catalyst with cooperative dual active sites via a dealumination-controlled strategy, which bears potential application for constructing other heteroatom-containing FAU-type zeolites with Lewis acid property.
研究领域:
催化化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2022
·
IF 12.92
Wenhao Cui,Dali Zhu,Juan Tan,Nan Chen,Dong Fan,Juan Wang,Jingfeng Han,Linying Wang,Peng Tian,Zhongmin Liu
ABSTRACT Mesoporous high-silica zeolite Y with advantages of improved accessibility of acid sites and mass transport properties is highly desired catalytic materials for oil refinery, fine chemistry and emerging biorefinery. Here, we report the direct synthesis of mesoporous high-silica zeolite Y (named MSY, SiO 2 /Al 2 O 3 ≥ 9.8) and their excellent catalytic cracking performance. The obtained MSY materials are mesoporous single crystals with octahedral morphology, abundant mesoporosity and excellent (hydro)thermal stability. Both the acid concentration and acid strength of H-form MSY are obviously higher than those of commercial ultra-stable Y (USY), which should be attributed to the uniform Al distribution of MSY zeolite. The H-MSY displays an obviously reduced deactivation rate and improved catalytic activity in the cracking reaction of bulky 1,3,5-triisopropylbenzene (TIPB), as compared with its mesoporogen-free counterpart and USY. In addition, H-MSY was investigated as catalyst for the cracking of industrial heavy oil. The MSY-based catalyst (after aging at 800 o C in 100% steam for 17 h) exhibits superior conversion (7.64% increase) and gasoline yield (16.37% increase) than industrial fluid catalytic cracking (FCC) catalyst under the investigated conditions.
研究领域:
化学工程
·
石油炼制
·
催化材料
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2018
·
IF 1.712
Yingdi Luo,Qilei Zhang,Shanjing Yao,Dongqiang Lin
The importance of immunoglobulin Y (IgY) as a specific antibody equivalent to mammalian immunoglobulin G (IgG) is well recognized. However, production of highly purified IgY is still difficult due to the lack of specific purification methods. In this study, adsorption behaviors of IgY on four mixed-mode resins with functional ligands of 4-mercatoethyl-pyridine (MEP), 2-mercapto-1-methyli-midazole (MMI), 5-aminobenzi-midazole (ABI) and tryptophan-5-aminobenzi-midazole (W-ABI) were evaluated. The results showed that high adsorption ratio were found at pH 6.0–7.0 with little adsorption under acidic conditions. The resin with ABI ligand was then used to separate IgY from immunized chicken serum. An efficient process with IgY purity of 95% and recovery of 90% was developed after optimization of loading and elution pH and injection volume. The biological activity of the purified IgY was fully maintained. These results indicated that mixed-mode chromatography with specially-designed ligands has great potential for the separation of IgY from crude feedstock.
研究领域:
生物化学
·
免疫学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2017
·
IF 6.216
Wenwu Zhou,Yasong Zhou,Qiang Wei,Sijia Ding,Shujiao Jiang,Qing Zhang,Meifang Liu
Mesoporous Y composites which exhibit both crystallized micropores and large mesopores with narrow mesopore diameter distributions and controlled pore diameters were successfully synthesized. The composite is synthesized through an elaborate design of the SiO 2 @cationic surfactant cetyltrimethylammonium bromide (SiO 2 @CTAB) micelle swelled by an appropriate amount of 1,3,5-trimenthylbenzene (TMB); it is subsequently fabricated from the condensing of the Y zeolite precursors, which contain Y zeolite seeds, on the mesoscale micelle followed by a hydrothermal crystallization process. The effect of synthesis conditions such as the amounts of CTAB, TMB and TEOS added to the synthesis system on the physicochemical properties of the obtained products was examined. The as-synthesized materials were carefully characterized by employing XRD, N 2 adsorption–desorption, SEM, TEM and pyridine-adsorbed FTIR techniques. The mesoporous Y zeolite exhibited both the typical diffraction characteristics of Y zeolites in the wide-angle XRD pattern, and the typical diffraction characteristics of a narrowly dispersed mesopore structure in the small-angle XRD pattern is successfully synthesized for the first time. Finally, the adsorption capacity for DBT and 4,6-DMDBT by samples with different mesopore diameters were assessed by a batch method. Sample MY-0.5C-0.35T-0.9B showed the highest capacity for adsorbing DBT in model diesel, and sample MY-0.5C-0.35T-1.5B showed the highest capacity for adsorbing 4,6-DMDBT in model diesel. Most importantly, sample MY-0.5C-0.35T-1.5B showed the highest adsorptive rate for both DBT and 4,6-DMDBT, which is at least 10 times faster than that of sample MY-0C-0.35T-0B because of the elimination of the diffusion limitation.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
POULTRY SCIENCE
·
2023
·
IF 4.4
Han Su,Kemin Wei,Minlei Zhao,Xin Li,Yibo Zhang
ABSTRACT Porphyromonas gingivalis ( P. gingivalis, P. g ) is the main pathogen of periodontal disease, which is treated with egg yolk immunoglobulin Y ( IgY ) against P. gingivalis . In order to quickly obtain IgY, 30 hens were immunized with inactivated P. gingivalis . The purification of IgY was carried out by the oleic acid ( OA ) method and the classical method ( AS ), respectively. The IgY antibody characteristics and antibacterial effects in HPDLF cells were detected by SDS-PAGE, indirect ELISA, Western blot and viability/toxicity assays. SDS-PAGE and Western blot analysis showed that IgY molecules which were rapidly purified by OA method were complete and specific to P. gingivalis . In addition, the results of crystal violet staining and bacterial staining indicated that IgY could agglutinate with P. gingivalis , inhibiting bacterial invasion of host cells. This study is the first to rapidly and efficiently purify IgY by OA method, and the purified IgY is expected to be used in the detection and treatment of P. gingivalis .
研究领域:
牙科学
·
免疫学
·
微生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FUEL
·
2024
·
IF 6.7
Jingjing Wang,Xinjie Wei,Zhihui Wen,Junjie Liao,Liping Chang,Jiancheng Wang,Kechang Xie
Ultra-deep desulfurization for the generation of clean petrol, diesel, and benzene remains a significant and challenging goal globally. Cu-containing materials have emerged as a promising desulfurization strategy due to their high adsorption capabilities. However, existing reduction technologies often lead to over-reduction. In this study, we reveal an intriguing and unexpected property of Y zeolite following ammonium ion exchange. The in situ generation of ammonia from ammonia pools may alter the location of copper species and modify their acid characteristics. We encapsulated various amounts of Cu into CuY zeolite, labelled as H-Cu X -Y(APE), using a facile self-reduction strategy. Notably, H-Cu 5.71 -Y(APE) exhibits an exceptional breakthrough sulfur capacity for thiophene, achieving 4.17 mg/g, nearly double that of traditional Cu-HY(H 2 ). XPS analysis following APE reduction indicates a high proportion of Cu + species in H-Cu 5.71 -Y(APE). In situ calcination FT-IR provided detailed insights into the chemical transformation of Cu 2+ species during APE reduction. Furthermore, CO-FTIR analysis shows that the Cu + content in the supercages of H-Cu 5.71 -Y(APE) reaches a maximum of 62.3 %. Py-FT-IR reveals the strong Brønsted acid content in H-Cu X -Y(APE) significantly increases. The desulfurization mechanism of H-Cu X -Y(APE) was thoroughly investigated using in situ FT-IR, demonstrating that the protonation and copolymerization of thiophene occurred on HCuY(APE) and could be effectively suppressed by adjusting the amount of copper. This work presents a promising solution for efficient ultra-deep desulfurization using an in situ NH 3 reduction method from ammonia pools.
研究领域:
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Desalination and Water Treatment
·
2025
·
IF 1
Abdul Haleem,Jaweria Ambreen,Syeda Huma H. Zaidi,Mohamed Soliman,Nadeem Kizilbash,Daliyah Alruwaili,Jamith Basha,Syafiqah Saidin
The fabrication of macroporous materials exhibiting catalytic properties to degrade detrimental toxicants from water has gained significant interest. Herein, acrylamide-based pure cryogels were synthesized by UV-initiated free radical cryopolymerization method and were further incorporated with palladium nanoparticles employing the in situ chemical reduction method. The verification of the functional groups for the cryogels was done by using Fourier-transformed infrared spectroscopy. The formation of cryogels was confirmed by X-ray diffraction, energy-dispersive X-ray and transmission electron microscopic methods, respectively. The macroporous morphological analysis of cryogels was done by scanning electron microscopy. Moreover, Thermo-gravimetric analysis showed that palladium incorporated cryogels exhibit more thermal stability as compared to pure cryogels. The palladium incorporated cryogel was implemented for degrading an organic dye, Eosin Y. The catalysis efficiency of Pd-incorporated cryogels was also compared to a conventional Pd-embedded hybrid hydrogel. The impact of cross-linker content, temperature, and catalyst amount on degradation rate was studied by UV–visible spectroscopy. The degradation time for Eosin Y dye using 0.5 g of Pd-nanoparticles embedded cryogel with 3 % crosslinker content was 10 min at 25 º C. By considering their feasible UV-initiated synthesis route and adsorption enactment, the fabricated cryogel could be applied as a suitable prototype for water clean-up solutions.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
LIQUID CRYSTALS
·
2019
·
IF 3.078
Zirui Lin,Yuehua Cong,Baoyan Zhang,Haozhou Huang
A novel Y-shaped liquid crystalline epoxy with a rigid core with three flexible liquid crystalline arms (ETTPM) was synthesised and its structure was characterised by Fourier transform infrared spectroscopy and nuclear magnetic resonance (NMR) spectroscopy. It was analysed and observed by differential scanning calorimetry, X-ray diffraction and polarised optical microscopy (POM) that the liquid crystal phase was stable on the temperature range of 107.8°C. In particular, an unusual transition phenomenon of liquid crystal phases was observed. Modified epoxy-resin-cured products were prepared using ETTPM, epoxy resin E51 and 4,4-diaminodiphenyl methane. The liquid crystalline domains in cured products were observed by researching their scattering effect on laser. Mechanical tests showed that ETTPM was effective for the mechanical properties improvement of epoxy-resin-cured products, as demonstrated in the improvement of impact strength, tensile strength and tensile elasticity modulus. The impact fracture cross-sections and surface morphologies were studied further by POM and scanning electron microscopy (SEM). Crack deformation, crack split and notable plastic deformations were found in modified epoxy-resin-cured products, and these factors played important roles in improving the impact strength.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Jie Li,Jie Sheng,Changsheng Xing,Bin Liu,Yunzhong Wu,Tong Zhang,Jiaxu Shuang,Ziyue Yang,Lidong Wang,Weidong Fei
The strategic design and assembly of bulk graphene materials represent a pivotal advancement for harnessing the inherent properties of graphene in practical applications. However, fabricating high-strength graphene-based bulk materials from graphene powders presents a significant challenge, primarily due to interlayer slippage between the graphene layers. Here, a unique Y-type connection structure was found in few-layer graphene synthesized by self-propagating high-temperature synthesis (SHS) and subsequently retained in graphene-based bulk materials prepared by spark plasma sintering (SPS) process. The Y-type connection structure and defect-induced linkages serve to cross-link the graphene-based bulk materials. Consequently, the bulk material exhibited an ultra-high compressive strength, reaching 2.14 GPa, supported by Molecular dynamics (MD) simulations which demonstrated that the Y-type connection structure increases the shear modulus and the load transfer rate. The Y-type connection structure plays a vital role in reinforcing the strength of graphene-based bulk materials, offering valuable insights for the microstructural design and property augmentation of other graphene-derived materials. Besides it’s ultra-high compressive strength, the graphene-based bulk material also performs a low thermal expansion coefficient (0.5 × 10 −6 K −1 ), high electrical conductivity (1.47 × 10 5 S·m −1 ) and exceptional EMI shielding capability.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）