APPLIED CATALYSIS A-GENERAL
·
2022
·
IF 5.723
Yushan Yang,Shaoyu Yuan,Heli Pan,Zixuan Li,Zejiang Li,Sufang Sun,Yongjun Gao
A novel explosion-assistant strategy was developed to fabricate graphene oxide supported nickel and palladium three-component catalyst Pd/Ni/NiO/GO for hydrogenation of nitriles to secondary amines. The explosion during the synthesis of catalyst was essential to the well-dispersion of palladium and the decomposition of metal salt precursors. Palladium component was well anchored on nickel oxide and graphene oxide sheets, which regulated the catalytic performance of palladium. This special structure facilitated the spillover of active hydrogen species generated on palladium component to nickel (oxide) and graphene oxide sheets, enhancing the catalytic activity of the bimetallic catalyst. This work developed an effective strategy to fabricate multi-component metal catalyst with low-cost transition metal as main composition for selective hydrogenation of nitriles to secondary amines.
研究领域:
催化
·
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
FUEL PROCESSING TECHNOLOGY
·
2021
·
IF 7.033
Yang Liu,Zhengnan Sun,Guolin Jing,Shuo Liu,Yihai Yang,Jianqi Xu
The alkali-catalyzed alcoholysis of polyethylene vinyl acetate (EVA) was used to obtain the product ethylene-vinyl alcohol copolymer (EVAL), and the grafting product poly(ethylene-vinyl alcohol)-graphene oxide (EVAL-GO) was prepared in the form of chemical grafting by utilization of the groups on the surface of GO and EVAL through the esterification reaction. The products were analyzed by Fourier transform infrared (FTIR), 1 H nuclear magnetic resonance (NMR) and Thermogravimetric (TG). The rheological properties of the oil sample and changes in the morphology of wax crystals were characterized by Advanced Hybrid Rheometer and polarized optical microscopy (POM) respectively. The degree of alcoholysis of EVAL reached 74.51%, and the grafting rate of EVAL-GO (0.5%) was 36.18%. Reduction of pour point and gel point of nanocomposite treated crude oil was 12 °C and 4 °C from undoped crude oil at the optimum additive concentration of 1000 mg/kg. Moreover, it decreased the viscosity and yield value of virgin crude oil by 99.5% and 78.3%, respectively. From the morphological analysis, it was indicated that EVAL-GO could make the wax crystals form sphere-like crystals, and the increased void space promoting more liquid oil to be released thus significantly improving the low-temperature fluidity of Daqing waxy crude oil.
研究领域:
石油工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2019
·Vol. 55
·期 4
·1525-1535
·
IF 3.442
Zhang Jian,Jiang Yuting,Zhang Jiaxin,Zhang Lanhe,Wang Bing,Li Zheng,Liu Congze,Wang Haonan
2,4-Dichlorophenol (2,4-DCP) is a kind of toxic organic compound listed as a priority pollutant by the environmental protection agency, which will endanger the environment and human health. The accumulation of 2,4-DCP in the environment has become a serious problem today since 2,4-DCP is difficult to be degraded by traditional methods. In this study, a novel palladium/graphene oxide/indium tin oxide (Pd/GO/ITO) composite electrode was prepared by constant current electrodeposition method. And the surface morphology, crystal structure and surface element valence state of the electrode were observed and analyzed by SEM, XRD and XPS, respectively. Finally, by studying the influence of different conditions on the performance of the electrodes, the electrochemical degradation efficiency of the new electrodes on 2,4-DCP was investigated. It was found that the degradation of the Pd/GO/ITO electrodes on 2,4-DCP followed a quasi-first-order reaction under different conditions.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
You-Yong Wang,Yuan-Qing Li,Shan-Shan Xue,Wei-Bin Zhu,Xiang-Qian Wang,Pei Huang,Shao-Yun Fu
Development of lightweight structural materials from fast-growing bamboos is of great significance to building a sustainable society. However, previously developed structural bamboos by delignification combined with densification would easily fail under large external loading after exposure to water due to structure collapse, severely limiting their practical applications. Here, we demonstrate an ultrastrong and exceptional environmentally stable bamboo composite consisting of a graphene oxide (GO)/bamboo core and hierarchical SiO2 protection layer. The GO/bamboo composite exhibits ultrahigh tensile strength (641.6 MPa), superb flexural strength (428.4 MPa), and excellent toughness (17.5 MJ/m3), which are increased by about 480, 250, and 360% compared with natural bamboo, respectively. As a result, the specific tensile strength of the GO/bamboo composite is up to 513.3 MPa·cm3/g due to its low density (1.25 g/cm3), outperforming engineering structural materials such as aluminum alloys, steels, and titanium alloys. These large improvements benefit from the well-preserved bamboo scaffold and the strong hydrogen bonds between bamboo fibers and GO nanosheets. On the other hand, the SiO2@GO/bamboo composite shows superhydrophobicity due to the construction of hierarchical SiO2 layers, which endows it with outstanding water resistance. Moreover, the bamboo composite shows an ultralow coefficient of thermal expansion (≈2.3 × 10–6 K–1), indicating its excellent dimensional stability. Considering the ultrahigh mechanical performance and outstanding environmental stability, the developed lightweight SiO2@GO/bamboo composite is hopeful to be a green and sustainable structural material for practical engineering applications.
研究领域:
材料科学
·
可持续工程
·
复合材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Water Process Engineering
·
2022
·
IF 7.34
Qianqian Pei,Ming Chen,Jingda Li,Jie Liu,Nan Wu,Kaiyang Chen,Xiaoyu Chen,Yanli Liu,Yifeng Feng,Gaofeng Ren,Xiaoying Liu
Ammonia oxidation is a critical process during nitrogen removal, while the activity of ammonia oxidizing bacteria (AOB) might be impacted severely in disposing high-salinity nitrogen-containing wastewater. To protect AOB in high saline medium, layer-by-layer self-assembly using graphene oxide (GO) and poly(diallyl dimethyl ammonium chloride) (PDDA) was applied to immobilize enriched AOB. By mixing GO and AOB, it was found that 30 mg/L GO showed the best promotion on the ammonia oxidation capacity of AOB. After coating, AOB with PDDA/GO showed higher absolute value of zeta potential of −20.1 ± 1 mV and compact structure. Comparing with uncoated AOB, although NH 4 + -N consumption process was slightly inhibited by the PDDA/GO composite materials under low-salinity conditions (0–2 % NaCl), they presented great effective protection on the capacity of AOB in a 3 % NaCl solution. The consumption ratio of NH 4 + -N was 1.34 times that of uncoated AOB, and the accumulation ratio of NO 2 − -N of the former one was 1.40 times that of the latter. It inferred that the inhibitory to mass transferring caused by immobilizing materials was less than its positive promotion of AOB protection at 3 % NaCl concentration, and the protection of PDDA/GO composite materials was better than GO. This finding has some certain guiding significance for ammonia oxidation in high salinity.
研究领域:
环境微生物学
·
污水处理工程
✓ 已验证
产品关联
DOI
高影响因子
DESALINATION
·
2020
·
IF 7.098
Jing Ma,Xiaodong Tang,Yi He,Yi Fan,Jingyu Chen,HaoYu
Robust stable filtration membranes based on graphene oxide (GO), with fast and efficient capacity to separate dyes or salts from water, are highly necessary to maintain fresh water resources, but still a challenge to achieve. Herein, an easy and effective route has been demonstrated to address this challenge by intercalating GO with molybdenum disulfide (MoS 2 ) nanosheets . Prompted by the strong van der Waals interactions between GO and MoS 2 and the weak interaction between MoS 2 and H 2 O molecules, the interlayer stabilizing force within the MoS 2 /GO filtration membrane has been greatly enhanced. Therefore, robust stability against harsh conditions (pH values from 3 to 11) without any additional cross-linkers can be realized. Additionally, compared with pure GO membrane, our MoS 2 /GO membrane exhibits both enhanced pure water flux (from 8.83 L·m − 2 ·h − 1 to 48.27 L·m − 2 ·h − 1 ) and improved salts removal capacity (i.e., K 3 Fe(CN) 6 (from 54.32% to 96.85%)), without deteriorating its dyes rejection ratio (i.e., methylene blue (more than 99.50%)). Meanwhile, the membrane also has outstanding cycling stability. For the ubiquitous van der Waals forces between two-dimensional materials, our method can be easily extended to construct other stable and highly efficient filtration membranes.
研究领域:
材料科学
·
环境工程
✓ 已验证
DOI
高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
·
2021
·Vol. 47
·期 6
·2331-2338
·
IF 2.914
Gong Jianqiu,He Chun,Zhang Jinlong,Wang Lingzhi
Photocatalytic treatment of water pollutants has attracted extensive attention due to its low energy consumption, low cost and the avoidance of secondary environmental pollution. However, most photocatalysts are in powder form, which makes it difficult to separate from the water system after the reaction. Especially in practical applications, the recycling of the catalyst is an important part. Based on the characteristics that sodium alginate (SA) is easy to form gels under mild conditions, GO-P25@SA gel beads were prepared. The catalyst can be separated from the water system by simple filtration, which greatly saves the recycle cost. Besides, the light response of TiO 2 (P25) and excellent conductivity of graphene oxide (GO) make GO-P25@SA have excellent photocatalytic degradation and cyclic stability for rhodamine B (RhB). In this work, the unique merits of GO and sodium alginate (SA) in developing functionalized photocatalyst were demonstrated, providing a low-cost and easy recycle treatment strategy for rhodamine B degradation.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
Carbon Letters
·
2019
·Vol. 30
·期 4
·425-434
·
IF 1.807
Wang Jingjing,Wang Weimin,Wang Jinghua,Xu Kangzhen
For solving phase separation of nanoparticles and graphene oxide (GO) in the application process, MgWO 4 –GO nanocomposites were successfully synthesized using three different dispersants via a facile solvothermal-assisted in situ synthesis method. The structure and morphology of the prepared samples were characterized by X-ray diffraction, Scanning electron microscopy, Transmission electron microscopy, Fourier transform infrared and Raman techniques. The experimental results show that MgWO 4 nanoparticles are tightly anchored on the surfaces of GO sheets and the agglomeration of MgWO 4 nanoparticles is significantly weakened. Additionally, MgWO 4 –GO nanocomposites are more stable than self-assembly MgWO 4 /GO, which there is no separation of MgWO 4 nanoparticles and GO sheets by ultrasound after 10 min. The catalytic results show that, compared with bare MgWO 4 , MgWO 4 –GO nanocomposites present better catalytic activities on the thermal decomposition of cyclotetramethylenete tranitramine (HMX), cyclotrimethylene trinitramine (RDX) and ammonium perchlorate (AP). The enhanced catalytic activity is mainly attributed to the synergistic effect of MgWO 4 nanoparticles and GO. MgWO 4 –GO prepared using urea as the dispersant has the smallest diameter and possesses the best catalytic action among the three MgWO 4 –GO nanocomposites, which make the decomposition temperature of HMX, RDX and AP reduce by 10.71, 11.09 and 66.6 °C, respectively, and the apparent activation energy of RDX decrease by 68.6 kJ mol −1 .
研究领域:
材料科学
·
化学工程
·
催化反应
✓ 已验证
DOI
高影响因子
Analytical Methods
·
2023
·Vol. 15
·期 6
·849-858
·
IF 3.1
Dandan Li,Xinxing Jiang,Yaxue Zhang,Wenxia Xue,Jihong Fu
A novel approach based on polydimethylsiloxane/graphene oxide/deep eutectic solvent (PDMS/GO/DES) sponge headspace solid phase extraction followed by GC-MS was successfully developed to determine the volatile components in cumin. The PDMS/GO/DES exhibits outstanding properties with high adsorption capacity and good chemical stability, and has shown its potentiality as an ideal adsorbent for the extraction of volatile compounds. The influence factors of the extraction process were investigated. Excellent analytical performances were achieved, including wide linearity (0.60–107.72 ng) with high correlation coefficients (R2 ≥ 0.9951), low LODs (0.23–9.23 ng) and LOQs (0.54–18.47 ng), satisfactory precision (intra-day RSDs ≤ 2.85% and inter-day RSDs ≤ 3.92%). Under the optimal extraction conditions, the volatile components in 17 cumin samples from four origins in Xinjiang were analyzed and 31 compounds were identified. PCA was used to establish the relationship between the origins and the volatile compounds for further discriminant analysis. The results showed that the PDMS/GO/DES method was a rapid, simple and sensitive technique for the analysis of volatile components in spices.
研究领域:
分析化学
·
食品科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 29
·e54070
·
IF 3
Kai Wang,Chiyu Zhou,Yibo Zhou,Yijia Fan,Junkang Chen,Linghao Hui,Xinyuan Zhang,Jianbin Qin
High performance electromagnetic (EM) interference shielding composites are of high demand due to increasing EM wave radiation pollution. In this work, GO/NiNCs/PMMA microcellular foams with different GO/NiNCs gradient and 3D conductive filler framework were fabricated by thermal reduction and supercritical CO 2 foaming process. With the crosslink of 1D NiNCs and 2D GO sheets, GO/NiNCs framework with electrical conductivity varied from 1.15 × 10 −4 to highest 1.09 × 10 −1 S/m is fabricated, exhibiting absorption-dominated electromagnetic interference shieling effectiveness (EMI SE) of 53.62 dB and specific EMI SE of 48.44 dB g −1 cm 3 in X-band. The density of GO/NiNCs/PMMA microcellular foams achieved lowest value of 0.623 g/cm 3 . Moreover, the foams showed excellent thermal conductivity and compressive strength of 178.76 MPa, indicating excellent application potential in aerospace and electronic field. The thermoplastic polymer matrix also indicates great potential in recycle of the foam material.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2019
·Vol. 43
·期 14
·5603-5610
·
IF 3.069
Ning Wei,Xudong Zheng,Hongxiang Ou,Peilin Yu,Qiao Li,Shanshan Feng
Metal–organic framework (MOF) materials are a class of hybrid organic–inorganic supramolecular materials. Owing to their highest specific surface area, lowest crystal density and adjustable pore size and functional structure, MOF materials have the potential for some special applications in the field of adsorption of heavy metal contaminants. However, it is difficult to collect and reuse them in adsorption separation because of their nanometer size. Therefore, graphene oxide (GO) with good film-forming properties is used. In this paper, an f-ZIF-8@GO composite membrane material was developed by using GO and a zeolitic imidazolate framework (ZIF-8) material and was modified with 3-aminopropyl-triethoxysilane (APTES) by amine functionalization. After a series of structural characterizations, it was applied to the adsorption of copper ions in water and its adsorption properties were tested. The results showed that the adsorption capacity at pH = 6.0 was the largest, and an increase in temperature was not conducive to the adsorption reaction. The adsorption data were fitted to the Freundlich equation and the quasi-second order kinetic equation. The adsorption of Cu2+ on water was multilayer, and the equilibrium adsorption capacity was up to 1872.24 mg g−1. The prepared materials exhibited high selectivity to copper ions; they could be reused as adsorbents for many times and maintained high adsorption capacity. This kind of material is of great significance for the adsorption and separation of heavy metal ions in water.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
WATER AIR AND SOIL POLLUTION
·
2025
·Vol. 236
·期 8
·1-19
·
IF 3
Ou Qianhui,Xiong Yan,Chen Li,He Deyong,Zhou Chuxiang,Wang Lan
The nanocomposite materials are highly promising candidates for adsorption applications in dyed wastewater due to their distinctive structural properties. In this work, the nanocomposite hybrids of UiO-66@GO were first synthesized by specifically anchoring Zr-based metal organic framework (MOF) of UiO-66 onto graphene oxide (GO) nanolayer through solvothermal method. Then the composite matrix microspheres (CMMs) of UiO-66@GO were subsequently prepared by embedding the obtained UiO-66@GO nanocomposite into sodium alginate (SA) microspheres through self-assembly cross-linking process. Finally, the prepared UiO-66@GO CMMs were applied for the adsorption of organic dye pollutant and showed efficient water purification performance. As a result, the UiO-66@GO CMMs exhibited selective cationic dye adsorption for Rhodamine B (RhB + ). The experimental results revealed that the adsorption kinetics followed by the pseudo-second-order (PSD) model with rate constant k 2 = 0.95 × 10 –3 g mg −1 min −1 , and the thermodynamics followed by the Langmuir model with adsorption capacity of 345.66 mg mg −1 . Notably, the UiO-66@GO CMMs demonstrated excellent adsorption removal of a significant removal efficiency of 98% towards 10 ppm Rh-B and a rapid adsorption response time of ~ 5 min. Meanwhile, the UiO-66@GO CMMs maintained long-term stability with adsorption efficiency > 95% over 30 days and effective reuse with resorption efficiency > 90% using DMF-H₂O as eluent. In this study, SA has served as a porous supporting matrix to immobilize UIO-66@GO nanoparticles, having mitigated issues of aggregation and leaching common to nanoscale adsorbents while improving reusability. The synergistic effect between UIO-66 and GO has further enhanced pollutant adsorption capacity, demonstrating significant potential for dye wastewater treatment applications.
研究领域:
环境科学
·
材料科学
✓ 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）