JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
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2024
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IF 5.8
Ji Liu,Hao Fu,Bin Hu,Guan-zheng Zhou,Shou-gang Wei,Zhen-xi Zhang,Qiang Lu
Pyrolysis, a promising thermochemical conversion technique, can convert lignocellulosic biomass into various value-added products. Herein, the selective production of 1,4:3,6-dianhydro-α- d -glucopyranose (DGP) was achieved through fast pyrolysis of cellulose based on oxalic acid-assisted torrefaction (OAT) pretreatment. The mixture of cellulose and oxalic acid first underwent torrefaction, followed by fast pyrolysis to yield DGP. Simultaneously, the air atmosphere was considered to facilitate the formation of esterification intermediates, thereby promoting the formation of DGP. The effects of torrefaction temperature, oxalic acid amount, as well as pyrolysis temperature were carefully explored for DGP production. A yield of 9.6 wt% and a selectivity of 57.5 % for DGP were achieved from the micro-scale pyrolysis of cellulose under the optimized conditions. In lab-scale tests, the DGP yield reached 12.5 wt% from cellulose. The OAT-based pyrolysis was confirmed to be applicable to the waste cellulose-rich materials, with a DGP yield of 8.2 wt% from waste cotton and 6.0 wt% from spent paper in lab-scale experiments. Additionally, the OAT-based pyrolysis also showed the potential for poly-generation of DGP and formic acid at different stages.
研究领域:
能源与燃料化学
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生物质转化技术
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产品关联
DOI
高影响因子
ChemNanoMat
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2024
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IF 2.6
Zhehan Yang,Qingling Ruan,Tiezhu Chen,Xiaolei Ren,Juan Lin,Xingxing Gu
The high energy density and low cost of sulfur make lithium–sulfur batteries one of the most promising candidates for the next generation of energy storage. Nevertheless, the application is still hampered by the shuttle effect of soluble lithium polysulfides (LiPSs) intermediates and slow redox kinetics, resulting in irreversible loss of the active material, severe self-discharge and poor cycle stability of the electrode. Therefore, in this work, a novel Mo,N co-doped porous carbon (Mo,N−C) was successfully synthesized by simply calcining a mixture of ramie degumming waste with cost-effective molybdenum salt, and then employed as the LiPSs anchor. Due to the conductive carbon matrix, abundant porous structures as well as the doping Mo and N heteroatoms, the sluggish redox kinetic of the cathode has been significantly improved and the shuttle phenomenon of LiPSs has been effectively inhibited, consequently, the as-prepared Mo,N−C/S-0.4 composite cathode could demonstrate a good initial capacity of 1379.2 mAh g −1 at 0.2 C, and the reversible capacity could remain at 997.5 mAh g −1 after 100 cycles. Even at a high discharge rate of 1.0 C, the capacity could remain at 700.2 mAh g −1 after 400 cycles. This work provides a new avenue for utilizing waste biomass in clean energy storage.
研究领域:
材料科学
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能源存储
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产品关联
DOI
高影响因子
CONSTRUCTION AND BUILDING MATERIALS
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2024
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IF 7.4
Zhiyi Wang,Fupeng Zhang,Yingshuang Zhang,Jiming Su,Hui Wang,Hongru Jiang
The demand for efficient heat dissipation in electronic and electrical equipment enclosures is rising due to the pursuit of higher performance. However, the predominant challenge lies in the use of plastic as the primary material, which lacks favorable thermal conductivity (TC) despite its good machinability . Compared with common fillers, pyrrhotite (Pyr) exhibits moderate TC, insulation properties , and abundant active polysulfide sites on its surface. To turn waste into treasure, we prepared an economic thermal conductive material by powder mixing of Pyr tailings and waste polystyrene (WPS). Hexagonal and monoclinic crystalline Pyr were also prepared respectively, and the results showed that the hexagonal crystalline Pyr exhibited better application potential of TC filler. Furthermore, the strengthening mechanism of polysulfide bonds on the TC was analyzed and demonstrated. The results of the performance evaluation showed that the TC of the composite with optimal conditions improved by 1162.5 % compared to the WPS matrix. Based on the concept of green chemistry and the universality of raw materials, the research provides a method with excellent cost advantages in the future. This method also opens up a new vision for boundary applications such as heat exchange coatings. It is believed that this work provided a green and economic perspective for the disposal of sulfide minerals tailings and waste plastics.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
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IF 8.5
Boyu Cui,Jiayan Ding,Hao Xie,Tong Ji,Chunmao Yang,Yutong Cui,Xin Shu,Wei Dai,Weihong Wang,Shuang Li
The excessive reliance on traditional petroleum resources poses significant environmental challenges. Fortunately, agricultural straw, which is often regarded as a waste product, has considerable potential for various applications. However, these materials are frequently crushed into particles, thereby neglecting their inherent structural advantages. In this study, wheat straw is utilized in its complete form and converted to a strong and flexible fiber bundle. We employ a top-down approach on whole wheat straw that involves an alkali pretreatment combined with delignification and freeze-drying to obtain highly directional cellulose aggregates. Subsequent twist densification results in the formation of a strong, flexible wheat straw-derived fiber bundle (WFB). WFB exhibits an excellent strength of 203.9 MPa, representing a 3.4 improvement rate in relation to that of the initial straw. This indicates that agricultural waste can be transformed to a high-performance material, embodying the concept of “Waste to Wealth.” In addition, WFB can be further functionalized (e.g., via hydrophobic treatment, dyeing treatment, or incorporation with a conductive material) on the basis of the abundant hydroxyl groups present on its surface. This strategy provides insights into the innovative utilization of straw and promotes its application in wearable textile and smart fiber development.
研究领域:
材料科学
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环境科学
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农业科学
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产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
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2024
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IF 7.4
Zhiren Zhao,Zhongtian Dong,Fenghe Wang,Fengyun Wang,Mingzhu Xia
In the present work, phosphogypsum (PG) waste was used as a calcium source, and integrated with 2-hydroxyphosphonoacetic acid (HPA) doping, modified inorganic-organic amorphous calcium phosphate hybrid composite was prepared, to remove Cd 2+ and Co 2+ in aqueous solution. The study demonstrated that when pH=8, the equilibrium adsorption capacity of hydroxyapatite (HAP) for Cd 2+ and Co 2+ can reach 275.84 mg/g and 70.63 mg/g, respectively. After modification with HPA, the adsorption capacity of 20HPA-HAP for Cd 2+ and Co 2+ was higher at 468.92 mg/g and 171.38 mg/g, respectively. Regeneration experiments show that the adsorbent has good recycling performance, and the adsorbent has a good adsorption effect on low-concentration cadmium and cobalt ions in the actual hard gold electroplating wastewater. Meanwhile, the adsorption mechanism of 20HPA-HAP for Cd 2+ and Co 2+ was vividly visualized through Multiwfn wavefunction program and VMD program. Therefore, the reason why doping HPA greatly improves the adsorption performance of amorphous calcium phosphate on heavy metal ions was revealed from the atomic point of view. The findings suggest a promising approach for the effective utilization of discarded PG and the effective treatment of heavy metal pollution in industrial wastewater , highlighting the dual benefit of waste material repurposing and pollution control , which was an innovative strategy of turning waste into treasure.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Liqing Zhang,Bo Li,Yonggang Wei,Haoyuan Xu
Environmental problems caused by Cr(VI) need to be solved urgently. As a green and safe adsorbent, magnesium oxide has the characteristics of strong adsorption capacity and safety, non-toxic and harmless. In this study, high-performance Cr(VI) adsorption material (F-MgO) was prepared by combination hydrothermal modification of recycling MgO and doping of solid waste fly ash with the MgO that was a by-product of high magnesium laterite nickel ore. The adsorption properties of F MgO composites for Cr(VI) were evaluated, and the maximum adsorption capacity of Cr(VI) by F MgO reaches 172.6 mg/g at pH = 2.0. The F-MgO also showed high stability and excellent cycle adsorption performance. The adsorption mechanism was extensively studied by adsorption kinetics and DFT theoretical calculation, and electrostatic adsorption and chemical interaction between Cr(VI) and F MgO active sites were demonstrated. The prepared F MgO composites from waste resources with a simple synthetic method have great potential in the treatment of chrome-containing wastewater to achieve the purpose of treating waste with waste.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2020
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IF 10.652
Lijun Guo,Jieting Zhao,Liming Zhao,Yuling Tang,Jianfei Zhou,Bi Shi
Carbonaceous materials have attracted considerable attention as promising catalysts of persulfate (PS) activation for antibiotic degradation. In this work, an environment-friendly and low-cost carbonaceous material (Cr 2 O 3 /BC) was prepared by pyrolyzing chrome shavings, and the catalytic ability of Cr 2 O 3 /BC for PS activation was evaluated using tetracycline (TC) as the model antibiotic. The Cr 2 O 3 /BC/PS system exhibited ultrafast TC removal efficiency (99.9% removal rate within 5 min), which was owing to persistent free radicals, defective sites, and dispersed Cr 2 O 3 particles, which were beneficial for the generation of free radicals, such as OH·, SO 4 ·- , ·O 2 – and 1 O 2 . Coexisting substances, such as inorganic ions and humic acid, exerted little effect on TC removal. In addition, 99.9% of TC removal rates were achieved in TC contaminated tap water. Cr 2 O 3 /BC/PS system also exhibited the high removal rates towards ciprofloxacin (98% removal rate within 5 min) and sulfadiazine (99.8% removal rate within 5 min). Surprisingly, no chromium was detected after TC degradation, indicating that no secondary pollution was generated. This work provides a feasible strategy for the high-value use of chrome shavings and a practical method for antibiotic removal.
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
危险品化学品经营许可证（带存储）