WOOD SCIENCE AND TECHNOLOGY
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2025
·Vol. 59
·期 6
·1-18
·
IF 3
Tao Xin,Fang Xiaoyang,Wu Shuangshuang,Shao Chuang,Xu Wei
Natural bamboo (NB) has inherent limitations, such as low thermal conductivity, tendency of hygroscopic expansion, and susceptibility to mold and mildew attack, which hampers its high value-added applications. This study developed high-performance bamboo-based polymer composites (BPC) by a delignification process combined with impregnation of AlN/BN-Epoxy resin. The thermal conductivity of BPC increased by 155.7% to 0.358 W/(m·K), as compared with NB, whereas hydrophobic modification of the surface reduced the hygroscopic volume expansion to below 3%. Application of pressure optimized the distribution of resin and interfacial bonding that could achieve a tensile strength of 115.61 MPa (10.2% increase compared to NB). Further, BPC showed improved thermal stability with peak pyrolysis temperature of 367.3 °C. Micromorphological analysis confirmed that continuous thermally conductive networks were formed by the alignment of AlN/BN filler in the epoxy matrix. Meanwhile, X-ray photoelectron spectroscopy (XPS) showed the presence of hydrophobic C-F bonds on the modified surfaces. This multi-scale approach could successfully overcome the limitations of bamboo’s performance, endowing BPC with combined thermal capabilities, mechanical strength, and environmental durability. These advancements make BPC a sustainable alternative to conventional underfloor heating substrates and heat dissipation components.
研究领域:
材料科学
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聚合物复合材料
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热工工程
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表面改性
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可持续材料
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2025
·
IF 2.5
Qixuan Qin,Yizhuo Fan,Wei Wang
In this work, Fe2O3 nanocubes doped with different amounts of transition metals (Cu, Zn) were prepared by hydrothermal synthesis and annealing method. Gas sensing performance tests show that the prepared pristine Fe2O3 exhibits the conductive property of an n-type material, while Cu&Zn doped Fe2O3 exhibit p-type conductive property. The sensors based on 5 at% Cu&Zn doped Fe2O3 showed significantly improved response, selectivity, long-term stability, and moisture resistance to acetone compared to the pristine Fe2O3 nanocubes. X-ray photoelectron spectroscopy (XPS) results confirmed that the adsorbed oxygen of 5 at% Cu&Zn doped Fe2O3 were significantly higher than that of the pristine Fe2O3, which is the main reason for the improved gas sensing performances. Therefore, this study provides an effective way to develop low-cost and high-performance gas sensors based on transition metal-doped metal oxide.
研究领域:
材料科学
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纳米技术
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传感器
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固体物理
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Cleaner Production
·
2022
·
IF 11.072
Huiping Zeng,Jianxue Li,Jiaxin Xu,Wei Qi,Ruixia Hao,Guowei Gao,Da Lin,Dong Li,Jie Zhang
The widespread use of tetracycline (TC) is a non-negligible cause of environmental pollution , such as antibiotic resistance genes (ARGs). Economical, green and efficient treatment methods are urgently needed. In this study, the magnetic N-doped iron sludge based biochar (N-BCFe) was prepared by a one-step pyrolysis method using the iron-containing sludge from groundwater treatment plants, sycamore leaves and urea as raw materials to active persulfate (PS) for TC degradation . The results show that under the optimal experimental conditions, the removal rate of 10 mg/L TC in the N-BCFe/PS system could reach 86.56% (120 min), accompanied by a 59.9% reduction in total organic carbon (TOC), and still 63.34% of TC was removed in the third recycle experiment. Combined with EPR, free radical quenching experiments and XPS spectra, it is confirmed that there are free radicals ( S O 4 · − , ·OH) and non-radical ( 1 O 2 ) pathways in N-BCFe/PS system. And the former is related to Fe doping, while the latter is attributed to N doping (nitrogen-containing functional groups). Seventeen TC intermediates were identified by LC-MS technology, and three TC degradation pathways were established accordingly. Generally, this study illustrates the considerable catalytic potential of N-BCFe and provides valuable insights into the synthesis of catalysts prepared from iron-containing sludge as feedstock.
研究领域:
环境科学
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化学
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材料科学
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水处理
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2020
·
IF 7.489
Xuanxuan Jia,Hao Liu,Yu Zhang,Wei Chen,Qing Tong,Guangxia Piao,Chuanzhi Sun,Lin Dong
In recent years, Fe-based catalysts for the selective catalytic reduction of NO with NH 3 (NH 3 -SCR) have been attracting more attention. In this work, a novel Fe-Sb binary metal oxide catalyst was synthesized using the ethylene glycol assisted co-precipitation method and was characterized using a series of techniques. It was found that the catalyst with a molar ratio of 7:3 (Fe:Sb) displayed the best NH 3 -SCR activity with 100% conversion of NO x (nitrogen oxides) over a wide temperature window and with good resistance to H 2 O + SO 2 at 250 °C. The X-ray photoelectron spectroscopy (XPS) and in situ diffused reflectance infrared Fourier transform spectroscopy ( in situ DRIFTS) of NO x adsorption results suggested that strong electron interactions between Fe and Sb in Fe-O-Sb species existed and electrons of Sb could be transferred to Fe through the 2Fe 3+ + Sb 3+ ↔ 2Fe 2+ + Sb 5+ redox cycle. The introduction of Sb significantly improved the adsorption behaviour of NO x species on the Fe 0.7 Sb 0.3 O x surface, which benefitted the adsorption/transformation of NO x , thereby facilitating the NH 3 -SCR reaction. In addition, the Fe 0.7 Sb 0.3 O x catalyst demonstrated a good tolerance of H 2 O and SO 2 , since the decomposition of NH 4 HSO 4 on the catalyst surface was promoted by the introduction of Sb.
研究领域:
催化
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环境科学
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材料科学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Weiqian Song,Yangxi Yan,Maolin Zhang,Dongyan Zhang,Li Jin,Zhimin Li
In this study, Co-doped 0.49 Pb(Ni 1/3 Nb 2/3 )O 3 -0.51 Pb(Hf 0.3 Ti 0.7 )O 3 ceramics with high piezoelectric constants, electromechanical coupling coefficients, and low dielectric losses were prepared by conventional solid-phase reaction method for use as piezoelectric energy harvesters in both resonant and non-resonant working states. XRD results showed the dissolution of Co ions in the crystal lattice , thereby replacing B-sites and transforming the crystal phase into tetragonal phase. Valence states of Co obtained from fitted XPS data confirmed the existence of Co as Co 2+ in the lattice. The introduction of Co 2+ effectively increased grain size, improved ferroelectric properties , reduced leakage current density, and enhanced electromechanical coupling coefficient k p . Impacts of Co-doping on properties of the as-obtained ceramics were discussed. The optimal performances were obtained at x = 1.25, with piezoelectric constant d 33 ~780 pC/N, electromechanical coupling coefficient k p ~0.62, and dielectric loss tan δ = 0.78%. In sum, the excellent piezoelectric properties of Co-doped PNN-PHT ceramics look promising for use as piezoelectric energy harvesters.
研究领域:
材料科学
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陶瓷
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压电材料
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能量收集
✓ 已验证
DOI
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2022
·Vol. 26
·期 4
·917-927
·
IF 2.747
Zhang Lang,Chang Shiying,Lu Xingjie,Han Tao,Jin Ruoheng,Zhao Tenglong,Fang Dong,xie Ming,Wang Mingjun,Yi Jianhong
Vanadate-based synthesis of battery electrodes has become a topic of research interest due to the high lithium storage performance. However, the rapid capacity decay seriously hinders its practical application. In order to improve the potential for Co 3 V 2 O 8 (CVO) as an electrode in lithium batteries, a Na 5 V 12 O 32 nanowire precursor with a smooth surface was obtained using the hydrothermal method. Next, the CVO nanowires assembled by nanosheets were fabricated by cation exchange from the Na 5 V 12 O 32 precursor. Finally, the elemental phosphorus-coated CVO was successfully synthesized by a custom furnace. The characterization of X-ray diffraction (XRD) and inductively coupled plasma emission spectroscopy (ICP-ES) quantified the ratio of P and CVO, and Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) revealed the presence and coverage. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) further demonstrated the existence and morphology of P and CVO. Meanwhile, electrochemical measurements illustrated the stable lithium storage and notable rate performance of the P-CVO electrode as compared to AN-CVO. The P-CVO electrode holds a higher stable cycle performance after 190 cycles, with discharge specific capacity of 415.3 mA h g −1 and capacity retention of 97% at a current density of 1.0 A g −1 (872 mA h g −1 , 2.0 A g −1 , 98.8%), versus AN-CVO with 320.6 mA h g −1 (capacity retention of 79.5%) after only 100 cycles. Thence, the synthetic strategy provides a potential solution to enhance the stability of electrodes for high-performance lithium-ion batteries.
研究领域:
材料科学
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电化学
·
能量存储
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2017
·
IF 3.582
Xiao-Bing Qian,Wen Peng,Yi-Biao Shao,Jian-Hua Huang
Nickel oxide/Au porous nanobelts were synthesized by hydrolysis of nickel (II) sulfate in the presence of Au nanoparticles under hydrothermal condition and subsequent calcination of Ni(OH) 2 /Au precursor in air. XPS measurement indicated the existence of both NiO and Ni 2 O 3 in nickel oxide/Au porous nanobelts. Heterojunctions between NiO and Ni 2 O 3 , as well as between NiO and Au, were observed in HRTEM images. Under visible light irradiation (λ > 420 nm), nickel oxide/Au porous nanobelts effectively produced hydrogen from water in the presence of Na 2 S and Na 2 SO 3 as sacrificial electron donor . The highest rate of hydrogen production over nickel oxide/Au porous nanobelt was 38.5 times higher than that of commercial NiO loaded with the same amount of Au. The photoluminescence spectra and transient photocurrent responses of nickel oxide/Au nanobelts reveal that the improved photocatalytic activity is due to the increased electron–hole separation at NiO Ni 2 O 3 and NiO Au interfaces. This work shows that low-cost nickel oxide could be used as visible light-active photocatalyst for hydrogen production.
研究领域:
材料科学
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纳米技术
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光催化
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能源材料
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2019
·Vol. 43
·期 43
·16981-16989
·
IF 3.069
Bingying Jia,Miaojiang Wu,Hua Zhang,Yi Zeng,Gongying Wang
Titanates are frequently used as precursors to prepare transesterification catalysts with TiIV species. Unfortunately, it is challenging to control the dispersity of TiIV active sites on supports. Herein, a series of TiIV species is anchored on abundant linker vacancy sites by introducing point and large scale defects in UiO-66(Zr/Ti) with hierarchical-pore structure. The catalyst functionalized by titanium(IV) oxide bis(2,4-pentanedionate) shows excellent catalytic performance in the transesterification of dimethyl carbonate with phenyl acetate. The catalysts are characterized by XRD, FT-IR, N2 adsorption–desorption, XPS, SEM and STEM-HAADF techniques. The results demonstrate that the delicate mesopores in the support can not only exhibit a large surface area for the distribution of the active sites, but also provide better mass transfer performance. Meanwhile, the introduction of octahedral TiIV ions raises the activity of the catalyst via more coordinatively unsaturated ZrIV sites. Furthermore, using titanium(IV) oxide bis(2,4-pentanedionate) as a Ti source can effectively prevent the condensation of tetrahedral TiIV species anchored on the hierarchical-pore UiO-66(Zr/Ti) support.
研究领域:
催化
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2017
·
IF 4.601
Shiwei Wang,Longfei Tang,Xiuxiang Tao
In this paper, effect of surfactants on the hydrophobicity of low rank coal particles by sliding time measurements was investigated. X-ray photoelectron spectrometer (XPS) analysis indicated that the surfaces of low rank coal particle consisted of many hydrophilic functional groups. It was observed that the sliding time of low rank coal particles in 2-ethyl hexanol solution was the shortest than that of low rank coal particles in dodecyl amine hydrochloride (DAH) and sodium dodecyle sulfate (SDS) solutions. Moreover, the maximum touching angle (θ T ) of low rank coal particles observed in 10 −2 mol/L of 2-ethyl hexanol solution was about 80°, which was the greatest than that of low rank coal particles, about 39° in 10 −3 mol/L of DAH and 35° in 10 −4 mol/L of SDS solutions, respectively. Therefore, the sliding time results indicated that the hydrophobicity of low rank coal was enhanced by 2-ethyl hexanol and DAH and reduced by SDS. However, it was noted that the hydrophobicity of low rank coal was depressed when the DAH concentration increased to 10 −2 mol/L. The flotation performances were consistent with the results of sliding time measurements. Therefore, effect of surfactants on the hydrophobicity of low rank coal particles can be characterized by sliding time measurements.
研究领域:
化学工程
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材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Tianxin Gu,Songwen He,Jianxin Yi,Qianwei Liang,Hanjin Luo
Heavy metals in industries such as electroplating plants and semiconductor industries usually exist in the form of heavy metal organic complexes, and the removal of heavy metal organic complexes is troubled by the difficulty of decomplexation as well as the complexity of the treatment process of the free heavy metal ions after decomplexation. In this study, we proposed a synergistic strategy for the removal and secondary utilization of Cu(II) organic complexes (Cu-EDTA) in wastewater through mixed pyrolysis of carbon nitride precursor and Cu-EDTA, and the resulted product was used for the efficient degradation of tetracycline (TC). The unique electronic structure of carbon nitride and abundant surface defects anchor Cu during pyrolysis, which effectively realizes the removal of Cu-EDTA from wastewater. In addition, the Cu and O co-doped carbon nitride (Cu/O-CN) catalyst constructed by this strategy was proved to be effective in peroxydisulfate activation TC degradation, with a removal efficiency of 91.5% in 20 min, a degradation rate of 0.1643 min −1 , and a TOC removal efficiency of 53%. X-ray Photoelectron Spectroscopy (XPS) and density functional theory (DFT) calculation revealed Cu + active center constructed by the strong metal support interaction between Cu and carbon nitride in Cu/O-CN and the 1 O 2 dominated nonradical degradation pathways of TC. This study demonstrated a synergistic strategy for the efficient removal and secondary utilization of Cu-EDTA in wastewater, providing new insights into the use of environmentally friendly and cost-effective methods for the removal and recovery of heavy metal organic complexes from wastewater.
研究领域:
环境科学
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化学工程
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材料科学
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废物管理
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2022
·
IF 8.035
Xiaodong Wang,Xiaoran Li,Sen Liu,Haofei Zhou,Qiuye Li,Jianjun Yang
Cis-9-Octadecenylamine modified α-Fe 2 O 3 and Fe(OH) 3 nanoparticles were successfully synthesized by using a one-step synthetic method. XRD results revealed that lower ratio of oleylamine to Fe 3+ introduce forming hematite phase but higher ratio introduce forming Fe(OH) 3 phase. FTIR, TGA, contact angle, and XPS results indicated that olelyamine were modified on the surface of α-Fe 2 O 3 or Fe(OH) 3 . A larger amount of oleylamine modifier is conducive to the dispersion of the catalysts in heavy oil. Oleylamine modified Fe(OH) 3 can be transformed into α-Fe 2 O 3 in situ during the catalytic reaction and shows higher catalytic activity in the viscosity reduction of Shengli extra heavy crude oil.
研究领域:
化学工程
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材料科学
·
石油工程
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2022
·
IF 8.035
Chenxi Lu,Yuanzhuo Zhou,Liangzhi Li,Hongwei Chen,Lishi Yan
Catalytic production of 5-hydroxymethylfurfural (5-HMF) from glucose is a promising routine for generation of varied value-added chemicals. Herein, Mixed-Metal metal–organic frameworks (MOFs)–Fe/MIL-101(Cr) and MIL-101(Cr, Fe) obtained from post-synthesis modification and one-pot synthesis approach respectively were applied for catalytic converting glucose to 5-HMF. The synthesized Mixed-Metal MOFs were characterized by PXRD, SEM, N 2 adsorption–desorption analysis, TGA, XPS and NH 3 -TPD. Cr-and Fe-containing Mixed-Metal MOFs Fe/MIL-101(Cr) and MIL-101(Cr, Fe) presented synergistic effect with enhanced catalytic ability for glucose transformation to 5-HMF compared with typical single-metal MOFs and sulfonic acid-functionalized MOFs. Moreover, these two Mixed-Metal MOFs also presented better thermal stability than single-metal MOFs like MIL-101(Cr). Fe/MIL-101(Cr) was found to possess higher catalytic performance than MIL-101(Cr, Fe). 55.8 % 5-HMF yield was obtained with Fe/MIL-101(Cr) at 170 °C for 2 h in DMSO/water system. In addition, Fe/MIL-101(Cr) demonstrated desired recyclability for five times without incredible loss in its activity. This study provides a Mixed-Metal strategy on MOFs for improving catalytic efficiency of glucose conversion to 5-HMF.
研究领域:
化学工程
·
材料科学
·
催化
✓ 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）