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
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
SURFACE & COATINGS TECHNOLOGY
·
2021
·
IF 4.158
Yuanming Gao,Yu Bai,Peng Zhang,Weicheng Liang,Qi Liu,Shufang Yan,Jiao Huang,Hongying Dong,Ruigang Wang,Wen Ma
A double rare-earth (Yb/Y) co-doped SrZrO 3 [Sr 1.0 (Zr 0.9 Yb 0.05 Y 0.05 )O 2.95 ] thermal barrier coating was prepared via suspension plasma spraying (SPS). The rare-earth nitrates [Zr(NO 3 ) 4 ·5H 2 O, Sr(NO 3 ) 2 , Yb(NO 3 ) 3 ·6H 2 O, Y(NO 3 ) 3 ·6H 2 O] and NH 4 (C 2 O 4 ) 2 ·H 2 O were used to prepare the precursor suspension by co-precipitation. The thermal decomposition and crystallization of the precursor suspension powders calcined at 1200 °C were characterized with X-ray diffraction and a synchronous thermal analyzer coupled with quadrupole mass spectrometry . Zr 2 (C 2 O 4 ) 2 (OH) 4 decomposed into Zr(C 2 O 4 ) 2 , ZrO 2, and H 2 O initially, followed by the decomposition of Zr(CO 3 ) 2 into ZrO 2 . The SrC 2 O 4 precursor decomposed into SrCO 3 and SrO consecutively. The ZrO 2 reacted with SrO (Yb 2 O 3 , Y 2 O 3 ) to generate the Yb/Y co-doped SrZrO 3 . And the Yb/Y co-doped SrZrO 3 coating with a columnar crystal structure was prepared by SPS, which was analyzed with scanning electron microscopy, an inductively coupled plasma atomic emission spectrometer, and a laser flash analyzer. The thermal conductivity of the as-prepared coating was 1.77 W·m −1 ·K −1 at 1000 °C, which was more than 19% lower than that of the SPS SrZrO 3 coating.
研究领域:
材料科学
·
热力学
✓ 已验证
DOI
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2024
·
IF 5.7
Zilin Wu,Min Huang,Junmei Jiang,Chun Zhang,Gefei Hao,Moxian Chen,Qing X. Li,Mengao Jia,Junfeng Liu,Xiangyang Li
Ningnanmycin has been proven to effectively inhibit infection by potato virus Y (PVY), although its underlying mechanisms remain unclear. In this study, we report a novel finding that ningnanmycin affects PVY replication. Two approaches were employed: studies using PVY movement-deficient mutants suggest that ningnanmycin, at a concentration of 500 μg/mL, inhibits PVY replication. Ningnanmycin interacts with the PVY-encoded coat protein (CP) with a binding constant of 1.34 μmol/L, and key amino acids Glu168 and Thr206 are involved in this interaction. Additionally, ningnanmycin induces the expression of antiviral response genes in Nicotiana benthamiana, including PRXIIB, PRXIIE, PUB4, and PER42. Furthermore, studies revealed that the overexpression of PUB4 in N. benthamiana confers resistance to PVY infection. These findings highlight the mechanisms by which ningnanmycin activates the PUB4 gene and suppresses CP assembly, thereby inhibiting PVY in N. benthamiana. This study represents an important step toward elucidating the molecular mechanism underlying the antiviral activity of ningnanmycin.
研究领域:
植物病理学
·
病毒学
·
分子生物学
·
植物生物技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2018
·
IF 1.712
Jing Zhu,Lisong Fan,Lina Song,Fengqiu Chen,Dangguo Cheng
Developing effective iron-incorporated zeolites and determining their active centers for the direct oxidation of CH 4 to oxygenates have remained challenging topics so far. In this paper, we successfully prepare the highly-dispersed iron supported Y zeolites by a facile solid-state ion-exchange method with ferrocene, which was conducted under water-free conditions followed by a series of calcination . Moreover, extra-framework dinuclear Fe 2 + complexes are identified as so-called active α-iron sites on zeolites. ICP-OES, N 2 adsorption–desorption test, X-ray diffraction, solid-state 27 Al NMR, N 2 O titration, TEM, EPR and 57 Fe Mössbauer spectra were carried out to characterize properties of sample structure, acid sites, as well as the supported iron species. Characterization results indicate that high-temperature treatments have no effect on the typical structure feature of zeolites. Compared with catalysts synthesized by conventional impregnation, the samples prepared by the facile approach possess abundant dinuclear Fe 2 + complexes but no Fe 2 O 3 bulks and show weak acidity. These lead to a higher oxygenate selectivity in CH 4 oxidation to oxygenates. Remarkably, the oxygenate (HCHO and CH 3 OH) selectivity of 6.5% at 375°C can be eventually obtained.
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
JOURNAL OF MATERIALS SCIENCE
·
2024
·Vol. 59
·期 20
·8721-8735
·
IF 3.5
Wang Yifan,Wang Lele,Li Qi,Wu Jianning,Meng Guihua,Yang Shengchao,Liu Zhiyong,Tai Yanlong,Liu Jichang
Photocatalytic overall water splitting (POWS) is a promising route for converting solar energy into green and sustainable energy. Herein, we report a facile hydrothermal approach to fabricate polyhedron BiVO 4 by Mo and Yco-doping (MYB) photocatalysts with suitable band gap for POWS. The MYB exhibited enhanced visible light-driven POWS activities in comparison with that of as-prepared BiVO 4 , Y-BiVO 4 and M-BiVO 4 , with the maximum H 2 and O 2 evolution rate of 34.7 and 17.4 μmol·h −1 ·g −1 , respectively. The optimum activity of the catalyst was controlled by adjusting Mo content of MYB. The photodeposition of Pt shows that there are special separation reduction and oxidation centers on the surface of MYB. Electrochemical experiments further confirmed the enhanced charge separation of MYB. MYB photocatalyst has small particle size, unique polyhedral structure, large specific surface area and high (103) and (200) surface exposure, thus improving POWS performance, high electron transfer efficiency and effective separation of photogenerated electron–hole pairs. Because of the doping of Mo and Y elements, the electronic structure of the catalyst is altered, enhancing light absorption and reducing the recombination of photogenerated electron–hole pair. The current study revealed that the MYB products could serve as cost-effective and stable photocatalysts for POWS. Graphical Abstract
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2016
·
IF 2.653
Huan Wu,Yanmei Zhao,Xuanping Tan,Xiaoqing Zeng,Yuan Guo,Jidong Yang
A convenient fluorescence quenching method for determination of Quizalofop-p-ethyl(Qpe) was proposed in this paper. Eosin Y(EY) is a red dye with strong green fluorescence (λex/λem = 519/540 nm). The interaction between EY, Pd(II) and Qpe was investigated by fluorescence spectroscopy, resonance Rayleigh scattering(RRS) and UV–Vis absorption. Based on changes in spectrum, Pd(II) associated with Qpe giving a positively charged chelate firstly, then reacted with EY through electrostatic and hydrophobic interaction formed ternary chelate could be demonstrated. Under optimum conditions, the fluorescence intensity of EY could be quenched by Qpe in the presence of Pd(II) and the RRS intensity had a remarkable enhancement, which was directly proportional to the Qpe concentration within a certain concentration range, respectively. Based on the fluorescence quenching of EY-Pd(II) system by Qpe, a novel, convenient and specific method for Qpe determination was developed. To our knowledge, this is the first fluorescence method for determination of Qpe was reported. The detection limit for Qpe was 20.3 ng/mL and the quantitative determination range was 0.04–1.0 μg/mL. The method was highly sensitive and had larger detection range compared to other methods. The influence of coexisting substances was investigated with good anti -interference ability. The new analytical method has been applied to determine of Qpe in real samples with satisfactory results.
研究领域:
分析化学
·
环境科学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 13
·7711-7717
·
IF 3.108
Ting Tang,Lei Zhang,Hai Dong,Zhongxue Fang,Wenqian Fu,Quanyong Yu,Tiandi Tang
Zeolite Y nanoparticle assemblies (Y-NA) with a mesoporous structure were directly synthesized at 75 °C for 16 h without adding any organic templates. The changes in structure, morphology and textural parameters of the materials obtained after different crystallization times were investigated via powder X-ray diffraction (XRD), infrared spectroscopy (IR), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and N2-sorption. The results show that Y-NA had a micro–mesoporous structure composed of highly crystalline particle assemblies with sizes of 400–900 nm. The H-form Y-NA (HY-NA) is strongly acidic, and exhibits a good catalytic performance in the Ritter reaction, as compared with the H-form microporous zeolite Y and mesoporous zeolite ZSM-5.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2015
·
IF 2.947
Xiaowei Chi,Zhaoyin Wen,Jingchao Zhang,Yu Liu
A novel hybrid route, combining simple co-precipitation and conventional solid state reaction, is proposed for the first time to synthesize BaCe 0.4 Zr 0.4 Y 0.2 O 3− δ powders at a temperature as low as 1150 °C. This temperature is much lower than that used for conventional solid state reaction method and even comparable to that used in sol–gel route. The reasons for the low calcination temperature are analyzed in detail from the macroscopic to microscopic viewpoints. Moreover, with the powders made by the novel method, dense ceramic could be easily obtained. Further, impedance data illustrated that its electrical conductivity in wet H 2 at 750 °C is up to 1.39 × 10 −2 S/cm, which is the highest among all the samples prepared by the three different methods and much higher than the reported results related to BCZY proton conductors . Also, the new method is particularly suitable for other multi-component oxides .
研究领域:
材料科学
·
无机化学
✓ 已验证
DOI
高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2018
·
IF 3.525
Dawei He,Danhua Yuan,Zhijia Song,Yunpeng Xu,Zhongmin Liu
Zeolite synthesis in contemporary chemical industries is predominantly conducted using organic structure-directing agents (OSDAs), which are chronically hazardous to humans and the environment. It is a growing trend to develop an eco-friendly and nuisanceless OSDA for zeolite synthesis. Herein, choline is employed as a non-toxic and green OSDA to synthesize high silica Y zeolite with SiO 2 /Al 2 O 3 ratios of 6.5–6.8. The prepared Y zeolite samples exhibited outstanding (hydro)thermal stability at ultrahigh temperature owing to the higher SiO 2 /Al 2 O 3 ratio. The XRF, SEM, 29 Si-NMR and 13 Na+ results suggested that choline plays a structure-directing role in the synthesis of Y zeolite, while the feed molar fraction of Na + is a crucial determinant for the framework SiO 2 /Al 2 O 3 ratio and the crystal morphology.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
Journal of Advanced Ceramics
·
2021
·Vol. 10
·期 6
·1326-1337
·
IF 6.707
Li Ke,Rao Jiancun,Ning Congqin
The novel dental ceramics can be fabricated at lower temperatures when sol-gel derived lithium disilicate glass ceramics (LDGC) was used as an additive for yttria stabilized tetragonal zirconia polycrystalline (Y-TZP) ceramics. The effect of LDGC on the sintering, mechanical, and translucent properties of Y-TZP ceramics was investigated in the present study. The results showed that the LDGC additive effectively improved the densification of Y-TZP at 1100 °C, which was much lower than the sintering temperature for pure Y-TZP. When sintered at 1100 °C, the Y-TZP with 1 wt% LDGC reached a relative density of 95.45%, and prossessed a flexural strength of 482.4 MPa and a fracture toughness of 5.94 MPa·m 1/2 . Moreover, its translucency was also improved. While, the addition of LDGC could result in an escape of yttrium atoms from the grain lattice of zirconia, which induced the tetragonal-monoclinic transformation of zirconia and abnormal growth of monoclinic grains. The escaped yttrium atoms diffused into the intergranular glass phase. The results indicated that the novel Y-TZP-LDGC ceramics has a great potential to be used for all-ceramic restorations.
研究领域:
材料科学
·
牙科医学
✓ 已验证
DOI
高影响因子
MACROMOLECULES
·
2024
·
IF 5.1
Tianfeng Zhou,Haotian Duan,Zhenzhong Li,Yu Jin,Hai Liu,Yuxia Pang,Hongming Lou,Dongjie Yang,Xueqing Qiu
Steric repulsive force is the main dispersion force between cement particles. In order to improve the dispersibility of polycarboxylate superplasticizers (PCEs), we designed and synthesized a new Y-type macromonomer (YPEG) with a molecular weight of Mw = 4100 Da. A long side chain-branched polycarboxylate superplasticizer (YPCE) was successfully synthesized by employing YPEG. Several common comb PCEs having the same side chain density but different lengths, such as PCE2400 and PCE4000, are employed to compare with YPCE for evaluating the dispersion performance. The results show that YPCE has a more excellent dispersion performance than the common PCEs under different water–cement ratios. Additionally, YPCE shows stronger water reduction for concrete. Furthermore, a dynamic light scattering study elucidates that YPCE can increase the adsorbed layer thickness from 5.6 to 7.9 nm, thus forming stronger steric hindrance. Simulations using molecular dynamics are conducted to investigate the influence of the conformational transformation of PCEs from comb-type to Y-type on the adsorption configuration and radius of gyration (Rg) of PCEs on calcium silicate hydrate surface. It is observed that the side chain of YPCE remains in an extended state, and Rg fluctuates little during the fitting process. This study provides a new strategy to enhance the steric hindrance of PCEs.
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
危险品化学品经营许可证（带存储）