JOURNAL OF MOLECULAR LIQUIDS
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2020
·
IF 5.065
Huiyan Xiong,Jiemin Chen,Tingting Zhang,Wenzhong Wang,Chengcai Huang,Yuling Zhu,Baowei Hu
In this investigation, the magnetic bio-CaCO 3 were synthesized and elimination of uranium and europium from aqueous solutions. The prepared magnetic composite underwent a series of characterization analyses, such as Transmission electron microscope (TEM), Scanning electron microscopy-energy dispersive spectroscopy (SEM-EDS), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS), which prove that the magnetic particles are successfully modified on bio-CaCO 3. Surprisingly, it was found that coating the bio-CaCO 3 with Fe 3 O 4 not only increased the distance between the calcium carbonate nanosheets but also ensured the presence of Fe O active groups on the bio-CaCO 3 surface. The sorption of U(VI)/Eu(III) on the magnetic bio-CaCO 3 as a function of the pH, adsorbent dose, shaking time, co-existing ions, and the temperature was investigated using batch experiments. The effect of pH was investigated showing optimum sorption at pH 5 for U(VI) and Eu(III). The adsorption kinetics is relatively fast and can reach equilibrium in 60 to 90 min, and the pseudo-second-order rate equation preferentially fits the kinetic distribution, suggesting chemisorption was involved. The maximum adsorption amounts were 122.66 mg·g −1 for U(VI) and 130.62 mg·g −1 for Eu(III) at pH 5.0 and 298 K. The adsorption mechanism, which was evaluated with XRD, FTIR, SEM-EDS, and XPS, demonstrated that the functional groups (O H, -NH 2 , CO 3 2− and O Fe) and the increased hierarchical distances were primarily responsible for the improved adsorption ability. This paper highlights magnetic bio-CaCO 3 as potential, eco-friendly and ultrahigh-efficiency materials for uranium and europium pollution cleanup.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
POLYMER BULLETIN
·
2025
·
IF 4
Gorar Athar Ali Khan,Zhiyi Guo,Zhicheng Wang,Daham Abbas,wang Xudong,Wang Jun,Liu Wen-Bin
Using agricultural waste as biocarbon material is a recent development with many potential applications. Nutshells can be utilized to produce biocarbon, enhancing the electrical properties of thermoset composites. In this research, Walnut shells (WSs) were carbonized at 750 °C, and activated carbon filler was thoroughly examined. Isothermal compression molding was used, and composites were produced by incorporating 1–2.5 wt.% of carbonized bio-filler (CW) into Vanillin-furfuryl amine-derived bio-benzoxazine. The composites showed improved thermal stability, increasing from 293 to 321 °C; Char yield enhanced from 53.3% to 60.4%. The flexural modulus and flexural strength exhibited enhancements of 41.3% and 20%, respectively, while toughness significantly increased from 0.87 to 0.94 N-mm compared to the neat matrix. Heat deflection temperature tests showed improved thermomechanical properties in composites. Flammability tests indicated that they are flame-resistant and fire-safe due to the CW filler. Thermal conductivity enhanced by 6%, and dielectric characteristics increased by 56.7% with 2.5 wt.% filler reinforcement. With the above findings, these composites can be utilized in designing parts exposed to fire, high temperatures, efficient energy storage, enhanced functionality in electronic devices, and improved insulation efficiency.
研究领域:
材料科学
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可持续发展
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Zhangxinyu Zhou,Yaoqi Huang,Qiang Shen,Yuanyuan Li,Xiaomin Cheng
The significant importance of developing phase change materials (PCMs) lies in their capability to meet diverse usage needs, particularly in the sphere of solar energy utilization. In this work, a thermal storage substrate was formed by adsorbing stearic acid in a biocarbon skeleton via vacuum impregnation. A composite PCM with multifunctional properties was subsequently synthesized by modifying the carbon mesh with copper sulfide (CuS) and zinc oxide (ZnO), compounding it onto the surface of the heat storage substrate. The biocarbon skeleton possesses a well-graded pore structure , which offers a significant number of channels for efficient heat transfer and effective electromagnetic shielding . The composite PCM retained a latent heat exceeding 155 J·g −1 . The integration of the biocarbon skeleton and modified carbon mesh led to a remarkable 119.42 % enhancement in thermal conductivity within the composite system , as compared to pure stearic acid. Furthermore, granular ZnO and nanoflower-like CuS are effectively integrated on the surface of the carbon mesh, facilitating the formation of localized surface heterojunctions . The composite system exhibits excellent broad-spectrum light absorption capability, producing a significantly elevated photothermal conversion efficiency of 88.93 %. Moreover, the semiconductor effect contributes to a remarkable degradation efficiency of 99.33 % for methylene blue . Significantly, the composite material demonstrates exceptional electromagnetic shielding capability, yielding a total shielding effectiveness exceeding 40 dB. The composite system also demonstrated outstanding thermal and cycling stability, with a negligible latent heat loss of merely 1.9 % even after undergoing 500 thermal cycles. This work proposes a pragmatic methodology to accomplish the functional integration of PCMs.
研究领域:
能源材料
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环境科学
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电磁学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2025
·Vol. 36
·期 12
·1-13
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IF 2.8
Wei S.,Qiu Y. F.,Yang X. B.,Hu Y. T.,Xie Z. X.,Duan Z. Q.,Zhou B.,Hu Y. M.
As highly efficient energy storage devices, performances of the supercapacitors are seriously influenced by electrochemical properties of the electrodes. This work is aimed at electrochemical properties improvement of the composites of biocarbon and nanocrystalline NiCo 2 S 4 (NCS) via stimulating synergistic effect of the conductive skeleton and the active redox material for advanced electrodes in supercapacitors. Nitrogen-doped and activated biocarbon (NAGC) with hollow-tubular structure derived from flocs on the underside of Gerbera delavayi Franch. Leaves were anchored with sheet-like NiCo 2 S 4 (NCS-S) nanocrystalline. Specific capacitances of 2282 F g −1 at 1 A g −1 was achieved by the NAGC@NCS-S electrode. Meanwhile, the capacitance retention is 98.96% over 5000 galvanostatic charge–discharge (GCD) cycles. An asymmetric supercapacitor (ASC) structured with NAGC@NCS-S//NAGC obtained high energy density of 58.1Wh kg −1 at power density of 935.1 W kg −1 , and a capacitance retention of 96.5% over 5000 GCD cycles.
研究领域:
材料科学
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能源存储
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植物学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Zhijun Wang,Hao Chen,Zhiqing Wu,Yijia Li,Hao Liu,Zhongyun Ma,Peng He,Qi Liu,Feng Tao
Discharging wastewater containing oils, fats, and organic solvents into water bodies poses a significant threat to the already limited freshwater resources. In recent years, three-dimensional (3D) porous adsorbent materials, such as aerogel materials, have gained attention for their high separation effectiveness in adsorption technology. However, the poor mechanical strength of existing aerogel materials limits their application in oil–water separation. To address this challenge, this study proposes to use carbon coils obtained from tea waste as a template for producing low-cost, ultra-light, elastic, and highly recyclable bio-carbon coil aerogels (BCCA). The BCCA, featuring high porosity and a hierarchical porous structure, demonstrated exceptional performance in oil–water separation applications. Specifically, it exhibited a high adsorption capacity for organic solutions (39 ∼ 117 g/g) and oils (32 ∼ 41 g/g), respectively, along with excellent selectivity, rapid adsorption time of approximately 30s, and good reuse capability, maintaining an adsorption efficiency of 85 %. These remarkable properties can be attributed to the exceptional hydrophobicity of the BCCA, with a contact angle of 134°, and the rapid capillary action facilitated by the helical network structure. The use of tea waste-derived carbon coils as a precursor for producing efficient and sustainable carbon coil aerogels presents a promising solution for environmental remediation, particularly in oil–water separation applications. This research addresses the issue of wastewater contamination and contributes to the utilization of tea waste, a readily available and abundant biomass resource, in the development of value-added materials for environmental sustainability.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2019
·
IF 7.65
Renlu Liu,Bin Lian
Ubiquitous calcium carbonate (biogenic or abiotic) exerted an important impact on the migration and transformation of heavy metal in the environment. Cd(II) pollution, common in China, has attracted much attention due to its critical toxicity. The purpose of this study is to compare the differences in adsorption and desorption characteristics of Cd(II) between biogenic CaCO 3 (BCa) induced by Bacillus subtilis and abiotic CaCO 3 [AR (analytical reagent grade)-CaCO 3 and limestone]. The results show that the adsorption data of BCa and abiotic CaCO 3 for Cd(II) more closely followed the Langmuir model compared to the Freundlich model. The maximum adsorption capacity (obtained from Langmuir isotherm) of BCa for Cd(II) (172.41 mg/g) was significantly greater than that of abiotic CaCO 3 (AR-CaCO 3 : 6.31 mg/g, limestone: 21.01 mg/g), and its maximum desorption rate (1.48%) was significantly lower than that of abiotic CaCO 3 (AR-CaCO 3 : 74.30%, limestone: 5.65%). Furthermore, the adsorption process of BCa is a spontaneous endothermic reaction and obeys pseudo-second-order kinetics. The obvious advantages of BCa are that it is easily obtained by bacterial culture, and another is its stronger immobilisation of Cd(II) compared to abiotic CaCO 3 , giving a promising potential for heavy metal remediation.
研究领域:
环境科学
·
微生物学
✓ 已验证
DOI
PubMed
高影响因子
BIORESOURCE TECHNOLOGY
·
2023
·
IF 11.4
Renlu Liu,Jialiang Zhang,Haiyun Fu,Li Yin,Yongsheng Song,Genhe He
Efficient removal of organic dye pollution from contaminated water is a concern in the absorbent applications. In this study, a green biogenic calcium carbonate (BCC) absorbent was fabricated using Bacillus licheniformis for the removal of methylene blue (MB) from water. This was found to have superior adsorption capacity compared with abiotic calcium carbonate (ACC) and operate within a broad pH range from 3 to 9. MB adsorption on BCC was physical and exothermic. The hydrophobic features, rough nanoporous microstructure, and organic–inorganic mesoporous structure of the BCC may all be responsible for its favorable adsorption mass transfer. The adsorption energy of BCC had a more negative value than that of ACC, indicating a stronger MB interaction with BCC with a lower energy barrier. Hydrogen bonding and electrostatic attraction were involved in the adsorption process. Overall, the findings established a theoretical foundation for the application of BCC in remediation of MB-contaminated water.
研究领域:
环境科学
·
生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CARBON
·
2025
·
IF 11.6
Hengyu Hao,Jiajiang Zhou,Li Tong,Richard Lee Smith,Feng Shen,Haixin Guo
Selective and efficient oxidation of glucose to sugar acids is a challenge for sustainable chemistry. This study develops catalytic nitrogen-doped biocarbon materials having PtZn bimetallic alloy active sites that promote selective and efficient oxidation of glucose at room temperature without the use of any type of additives. Spectral analyses were used to verify that nitrogen was incorporated into the lattice of the PtZn 1.7 alloy through Zn-N bond coordination. Urea was used as the nitrogen source for preparing PtZn@C-U catalyst that achieved sugar acid yields as high as 95.5% (84.7% gluconic acid, 10.8 % glucaric acid) under atmospheric conditions and ambient temperature (23 °C) in neutral water without alkali. The presence of urea in the synthesis procedure not only promoted biocarbon growth but also generated unsaturated carbon bonds, enhancing the hydrophobicity of the PtZn@C-U. This increase in hydrophobicity led to the exposure of active oxygen sites on the catalyst surface, which functioned as alloy active sites, contributing to the high catalytic performance in aqueous media. The catalyst offers cyclability and stability via N-doping and represents an advance in catalyst design for production of organic acids at ambient conditions.
研究领域:
材料科学
·
催化化学
·
可持续化学
✓ 已验证
产品关联
DOI
高影响因子
Results in Engineering
·
2022
·
IF 0
Chun-Sheng OuYang,Jing Tan,Chao Zhang,Hao Bi
Peroxymonosulfate (PMS) has attracted great interest over the past few years owing to its great capacity and versatility for the breakdown of developing antibiotic contaminants. It is under intensive investigation for its potential for alternative advanced oxidation processes (AOPs) in wastewater treatment. In this study, we used activated cobalt-doped carbon as a new and excellent metal catalyst to activate PMS. The synthesis of novel Co 3 O 4 @C-900 hybrids with numerous active interfaces and superior surface electron transfer was achieved. Co 3 O 4 @C-900 and carbon matrix mixed evenly to create a stable catalytic structure. The Co 3 O 4 @C-900 structure equipped them with enhanced catalytic efficacy, thus decreasing environmental harm during actual Chlortetracycline (CTC) degradation. The CTC removal rate reached 100% within 10 min, exhibiting outstanding stability and high efficiency of Co 3 O 4 @C-900 hybrids. Additionally, we elucidated the PMS activation mechanism by Co 3 O 4 @C-900 via electron paramagnetic resonance (EPR) spectroscopy, radical quenching studies, and characterization analyses. Free radical quenching experiments and EPR spectroscopy revealed that the degradation of CTC by the Co 3 O 4 @C-900 PMS system was a concomitant process of free-radical and non-radical reactions. The free-radical reactions were based on the activation of PMS by Co 3 O 4 @C-900 to generate O 2 - , SO 4 - and OH, whereas the non-radical reactions were based on the activation of PMS by C to generate the active species 1 O 2 . Therefore, this study presents Co 3 O 4 @C-900 as a promising candidate for PMS activation and also demonstrates a novel mechanism of CTC degradation.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Xueli Zhou,Weizhen Liu,Chen Tian,Siqi Mo,Xueming Liu,Hong Deng,Zhang Lin
The high value rare earth elements (REEs) recycling from wastewater remains a great challenge. In the present work, biological calcium carbonate (bio-CaCO 3 ) was functionalized by mussel-inspired polydopamine (PDA) chemistry to improve its Eu(III) adsorption in aqueous solutions. The functional groups of the organic matters in bio-CaCO 3 that served as both reductant and coupling agent were found to be able to effectively inhibit the auto-oxidation of PDA in alkaline environments, rendering a uniform and tight PDA coating on bio-CaCO 3 . The batch experiments indicated that the mussel-inspired PDA functionalized bio-CaCO 3 (bio-PDA) exhibited superior Eu(III) adsorption capacity in aqueous solutions. The adsorption isotherm was fitted well with the Langmuir model, and the maximum adsorption capacity was determined to be 151.52 mg/g. The adsorption kinetics followed pseudo-second-order model, suggesting that the adsorption was chemisorption. Based on the scanning electron microscope (SEM), energy dispersive X-ray spectrometer (EDS) and X-ray photoelectron spectroscopic (XPS) analyses, the possible Eu(III) adsorption mechanism of bio-PDA was proposed as the coordination of Eu(III) with the abundant catechol and amine/imine groups on the PDA coating. Our work has demonstrated great application potentials of bio-PDA as an efficient Eu(III) adsorbent and provided new insights into the interaction mechanism between PDA and Eu(III).
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
MICROCHEMICAL JOURNAL
·
2023
·
IF 4.8
Congcong Yao,Junchao Qian,Feng Chen,Yaping Wang,Jinyu Lin,Jianping Chen,Jianqiang Wei,Zeling Yang
Water quality monitoring requires new water sensors with highly sensitive and low-power consumption to detect the increasingly widespread contamination of antibiotics. Quantum dots (QDs), typically solid solution quantum dots (SSQDs), are emerging as promising sensing materials candidates owing to their unique structure with extremely small size and extraordinary electronic properties. In this work, Zn-doped CeO 2 solid solution quantum dots with 2–6 nm grain size were embedded into biocarbon sheets and constructed as modified sensing electrode to detect trace ciprofloxacin (CIP). Biocarbon skeleton and the highly defective SSQDs structure enables them to be ideal reactors for electro-redox of CIP. The proposed strategy offers a powerful and feasible way to fabricate SSQDs modified electrode, suggesting potential application of electrochemical sensor for antibiotic.
研究领域:
材料科学
·
环境科学
·
电化学传感
✓ 已验证
产品关联
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2018
·
IF 4.61
Zhuotong Zeng,Xueying Guo,Piao Xu,Rong Xiao,Danlian Huang,Xiaomin Gong,Min Cheng,Huan Yi,Tao Li,Guangming Zeng
Composting is an economic and effective technology for solid waste treatment , which is an essential method to promote the biogeochemical cycle of contaminants. However, the application of this technology was limited by the bio-degradative recalcitrance of lignin and other kind of phytotoxic substances release. The combination with microorganisms and enzymes is a popular and efficient way to enhanced composting. This study, referring to metabolic mechanisms, fungal molecular and biogeochemical cycles, was performed to investigate the effects of lignin degradation, carbon metabolic diversity, as well as the related changes induced by these two kinds of complex enzymes in composting. The biological diversity is important indicator in ecosystem, which concerns the environmental applicability of one technology. The carbon metabolism diversity reflected the biogeochemical cycles of organic matter, which was also an essential input to analyze the effects of composting. The changes on the diversity characteristics of carbon are essential to comprehensively understand the deep mechanisms of this process, and extended the application of complex enzymes in the field of enhanced composting. The analysis of Biolog revealed that the utilization of pyruvic acid methyl ester, α-Cyclodextrin, d -Mannitol, d -Galacturonic, Itaconic acid and l -asparagine were deeply promoted, and that of d , l -α-Glycerol-phosphate, l -Threonine, Glycyl- l -Glutamic acid and putrescine were depressed by adding the complex enzyme in composting. Moreover, according to the data, the addition of complex enzymes improved the degradation efficiency and the metabolic capacity of carbon in composting. These findings undoubtedly contribute to the development of enzyme-based technologies and the applications of complex enzymes in composting, which is of great benefit to eliminate the limitation and extend the application of composting.
研究领域:
环境科学
·
微生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）