Frontiers of Environmental Science & Engineering
·
2025
·Vol. 19
·期 6
·1-14
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IF 6.4
Zhang Tengyu,Zhang Jingxin,Zhang Pengshuai,Tong Yen Wah,He Yiliang,Yang Qing
Anaerobic digestion (AD) is a commonly used technology for facilitating carbon fixation by converting complex organic matter into volatile fatty acids and CH 4 ; however, the issue of CO 2 emission remains unresolved in AD. The formation of amorphous carbon has been identified as a more direct method of carbon fixation in AD. This study aimed to elucidate how amorphous carbon can be formed from organic matter or CO 2 by anaerobic microorganisms. The results showed that amorphous carbon was produced in the anaerobic digestion of inorganic and mixed carbon sources, with yields of 0.38 and 3 µg/10 5 cells, respectively. Its characteristics were analyzed using Raman microscopy. Isotope labeling revealed that CO 2 fixation into amorphous carbon primarily depends on the reversed oxidative tricarboxylic acid cycle (roTCA) and hydroxycaproate. Differential pulse voltammetry combined with gene abundance analysis indicated that flavin electron bifurcation (EB) is involved in electron transfer. The microbial isothermal calorimeter further measured the metabolic calorific value, demonstrating that anaerobic microorganisms can autotrophically fix CO 2 with energy provided by EB. Metagenomic analysis supported the large REDOX equivalents input from EB to sustain the roTCA cycle. This research contributes to understanding the mechanism of CO 2 fixation into solid carbon in anaerobic environments. Additionally, it provides new insights into the potential development of carbon-negative technologies in anaerobic biological treatment.
研究领域:
环境科学
·
微生物学
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2019
·
IF 3.973
Zekun Liu,Zhaozhu Zheng,Kaili Chen,Yi Li,Xiaoqin Wang,Gang Li
With the increase of vascular diseases in recent years, it is of importance to develop an anti-occlusion stent graft, which can meet the requirements of transplants for a long term. In this paper, we describe a silk fibroin (SF)/heparin-functionalized bifurcated stent graft (BSG) using textile forming technology. The BSGs were prototyped based on seamless weaving technology, and the surface was modified with SF-loaded heparin under steam/air treatment to improve their patency. The physical properties such as thickness, water permeability, contact angle, mechanical properties, and in vitro drug release and coagulation time of the BSGs were examined. The results showed that heparin modification can improve its coagulation time, and the water permeability resistance of the BSGs reached 1.154 ± 0.854 mL/(cm 2 ×min), while their thicknesses were just 0.085 ± 0.004 mm. The heparin release of the BSGs showed that the release time was prolonged upon steam treatment by means of the increase in the β-sheet structure and crystallinity of SF. The viability and attachment of human vascular smooth muscle (HVSM) cells cultured in the release of modified BSGs demonstrated that the modified BSGs could significantly inhibit the proliferation of HVSM cells. The heparin-functionalized BSG with satisfactory thickness, water permeability resistance and anti-occlusion function, which has potential applications in the treatment of vascular diseases.
研究领域:
生物医学工程
·
血管外科
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2016
·
IF 3.014
Guang-Xin Xiang,Guo-Jun Wang,Zhi-Jun Zhang,He Feng,Jing-Tai Zhao,Jiao Wang,Xin-Yuan Sun,Ri-Hua Mao,Yong Wang
The uniform 1D nano-rods of RE 3+ doped Ln 7 O 6 F 9 ( Ln = Y and Lu; RE = Pr, Sm and Eu) were synthesized through a facile two-step hydrothermal method without extra fluorine source followed by post-heat treatment. The phase formation, morphologies, as well as photoluminescence properties of the materials were investigated. The precursor composition was determined to be Ln (OH) 1.69 F 1.31 using the Fourier transform infrared spectrum (FT-IR), thermal gravimetric and differential scanning calorimetry (TG-DSC). The average lengths of Y 7 O 6 F 9 and Lu 7 O 6 F 9 were about 6.8 and 7.9 μm, respectively, with the average width of about 650 nm. It was interesting that the tip of the nano-rods exhibits a straight line and divergent umbrella shaped bifurcation for Y 7 O 6 F 9 and Lu 7 O 6 F 9 , respectively. Upon ultraviolet excitation, Pr 3+ , Sm 3+ and Eu 3+ ions in Ln 7 O 6 F 9 showed blue, orange and red emissions originating from their characteristic f-f transitions. In addition, the 4 f 1 5 d 1 → 4 f 2 band emissions (340–450 nm) as well as typical 4 f 2 → 4 f 2 line emissions (450–700 nm) of Pr 3+ were observed in Pr 3+ -doped Ln 7 O 6 F 9 . For Sm 3+ -doped Ln 7 O 6 F 9 , only the typical f - f transitions of Sm 3+ were observed with the absence of charge transfer (CT) band. However, the broad excitation bands at 255 nm attributing to the charge transfer transition of Eu 3+ (i.e. O 2− → Eu 3+ CT) were observed in Eu 3+ -doped Ln 7 O 6 F 9 .
研究领域:
材料科学
·
纳米技术
·
光学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Xuan Zhou,Wenxin Chen,Zhixuan Zhao,Shuqiang Peng,Lixin Wu,Zixiang Weng
Electrospun membranes have been extensively employed as radiative cooling membranes for thermal management in personal and architectural applications, owing to their facile processability and tunable structural configurations. However, intrinsic limitations such as narrow fiber size distribution, inherent hydrophobicity, and insufficient multifunctionality lead to challenges, including inadequate solar spectral coverage, low reflectivity, constrained moisture transport capacity, and absence of dynamic regulation. In this study, a bifurcated electrospun membrane with a broad fiber size distribution is fabricated via a jet splitting approach, providing a wider coverage of the solar spectrum. Inspired by vascular plant transpiration, bioinspired gradient wettability and porous structures are engineered, significantly enhancing moisture evaporation efficiency. Additionally, phase-change microcapsules (PCMs) with a loading capacity of up to 70 wt.% are successfully integrated into the fibers through a combined electrospinning-spraying technique, demonstrating a phase change enthalpy (Δ H m ) of 111.8 J g −1 . The optimized membrane exhibits 94.0% solar reflectance with a 0.2 mm thickness only while delivering 93.6 W m −2 radiative cooling power and 392.5 W m −2 evaporative cooling power, enabling a reduction of 5.7–17.4 °C skin temperature. The material integrates broad-spectrum coverage, high reflectivity, efficient evaporation, and substantial phase-change enthalpy in a low thickness, exhibiting great potential for personal thermal management and building energy efficiency applications.
研究领域:
材料科学
·
纳米技术
·
热工学
·
仿生学
·
高分子科学
✓ 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）