Journal of the American Chemical Society
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2022
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IF 16.383
Fei Xiao,Yian Wang,Gui-Liang Xu,Fei Yang,Shangqian Zhu,Cheng-Jun Sun,Yingdan Cui,Zhiwen Xu,Qinglan Zhao,Juhee Jang,Xiaoyi Qiu,Ershuai Liu,Walter S. Drisdell,Zidong Wei,Meng Gu,Khalil Amine,Minhua Shao
The poor durability of Pt-based nanoparticles dispersed on carbon black is the challenge for the application of long-life polymer electrolyte fuel cells. Recent work suggests that Fe- and N-codoped carbon (Fe–N–C) might be a better support than conventional high-surface-area carbon. In this work, we find that the electrochemical surface area retention of Pt/Fe–N–C is much better than that of commercial Pt/C during potential cycling in both acidic and basic media. In situ inductively coupled plasma mass spectrometry studies indicate that the Pt dissolution rate of Pt/Fe–N–C is 3 times smaller than that of Pt/C during cycling. Density functional theory calculations further illustrate that the Fe–N–C substrate can provide strong and stable support to the Pt nanoparticles and alleviate the oxide formation by adjusting the electronic structure. The strong metal–substrate interaction, together with a lower metal dissolution rate and highly stable support, may be the reason for the significantly enhanced stability of Pt/Fe–N–C. This finding highlights the importance of carbon support selection to achieve a more durable Pt-based electrocatalyst for fuel cells.
研究领域:
材料科学
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电化学
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能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Cleaner Production
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2023
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IF 11.1
Jie Qi,Yang Ge,Qingping Li,Xin Lv,Xiaojiang Li,Na Wang,Hongsheng Lu
Paraffin wax has caused obvious detrimental consequences to the extraction for fossil fuels, and posed environmental challenge due to the absence of cleaner methods for paraffin wax removal. A cleaner and sustainable approach for paraffin wax removal was developed using the switchable polarity solvents (SPS). Three SPS with low polarity, including dipropylamine (DPA), ethylbutylamine (EBA), and dibutylamine (DNBA) were selected for paraffin wax removal. Compared with bubbling CO 2 into SPS straightway, the transformation of the polarity quantified by normalized polarity energy confirms the addition of water is benefit to enlarge the polarity scope. Paraffin wax is removed at the initial state and separated at the final state by CO 2 -induced polarity transformation of SPS. The dissolution rates for paraffin wax of DPA and EBA reached 0.071 g/min and 0.062 g/min, which surpassed that of traditional solvents, such as o-xylene (0.045 g/min) and Petroleum ether (0.017 g/min), indicating that these selected SPS is suitable for paraffin wax removal. The paraffin wax dissolution behaviors of SPS can be accurately matched using modified Apelblat models with root-mean-square deviation of 1.085%. With the addition of water, more than 99% of paraffin wax is separated from DPA and EBA by introducing CO 2 within 10mins, which is a better alternative method for energy-intensive distillation process . The introduction of water is indispensable for improving the separation efficiency, since it enlarged the polarity difference between solvents and paraffin wax. The thermal behavior of separated paraffin wax detected by Differential Scanning Calorimetry remained steady, and there were negligible residual solvents detected indicate the feasible separation of paraffin wax. Both SPS and water are recovered upon N 2 /80 °C, which retain good recyclability for paraffin wax removal. These findings confirms the applicability of SPS in the sustainable and cleaner removal of paraffin wax. The use of SPS provides an alternative and promising approach for paraffin wax removal for ensuring the demands of low-energy consumption and environment.
研究领域:
能源与环境科学
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化学工程
✓ 已验证
DOI
高影响因子
Materials Advances
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2025
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IF 4.7
Jialun Su,Qiyue Fan,Xiangting Hu,Yue Sun,Jie Lin,Jiayue Xu,Bingcai Pan,Zhenda Lu
The increasing demand for lithium-ion batteries in the electric vehicle market has intensified the demand for efficient lithium extraction from salt lake brine. This study presents a novel approach using silica-coated lithium manganese oxide (LMO) adsorbents embedded in millimeter-sized sodium alginate (SA) beads (LMO@SiO2/SA beads). By replacing expensive and environmentally detrimental tetraethyl orthosilicate (TEOS) with low-cost, eco-friendly sodium metasilicate (Na2SiO3), we have developed a more sustainable and cost-effective lithium extraction method. Continuous flow adsorption–desorption experiments demonstrated the excellent performance of the LMO@SiO2/SA beads, maintaining a lithium adsorption capacity of 6.22 mg g−1 and a consistent manganese dissolution ratio of 1.26% per cycle after 50 cycles. These results highlight the potential of this approach for large-scale lithium extraction from salt lakes, providing a sustainable and economical option to support the growing electric vehicle industry.
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
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2025
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IF 7.2
Feng Feng,Jiaying Zhang,Lu Yu,Haixin Wang,Heda Ding,Jifan Cheng,Miaolan Wang,Fangfang Chen,Jiahui Zhang,Lingling Guo,Chunshan Lu,Qunfeng Zhang,Xiaonian Li
In order to develop an efficient and environmentally friendly method for the recovery of precious metals, a functionalized ionic liquid containing free radicals (1-methyl-3-(2-oxo-2-(2,2,6,6-tetramethyl-1-oxo-4-piperidinoxy) butyl) imidazole trichloro-1-bromoaluminium salt) was designed and synthesized. This was achieved by combining 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO), which possesses oxidizing properties, with halide ions that exhibit complexing abilities. Notably, under optimal conditions, a maximum gold dissolution rate of 100 % was attained. X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), and Raman spectroscopy analyses were conducted to elucidate the dissolution mechanism. Ultimately, these functionalized ionic liquids can be utilized for the dissolution of precious metals in CPU pins and waste catalysts. This study presents an effective approach for the recovery of precious metals.
研究领域:
化学
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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
FOOD CHEMISTRY
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2021
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IF 7.514
Hong Zhu,Zhuorui Han,Jun-Hu Cheng,Da-Wen Sun
Cellulose is a most abundant natural biopolymer, however, the strong hydrogen bonding system makes cellulose hard to dissolve, limiting its further applications. In this study, an innovative cold plasma (CP) technology was used to modify cellulose from sugarcane ( Saccharum officinarum ) bagasse pulp. Dissolution, structure, and surface chemistry of cellulose before and after CP treatment were investigated. Results showed that the dissolution rate of cellulose after different CP treatment time (3–12 min) and operating voltage (40–70 kV) was significantly improved. Roughness, even holes (CP treatment 9 min with 50 kV) and breakage (CP treatment 9 min with 70 kV) were observed on the surface. The crystallinity index decreased from 62.31% (control) to 60.88% (CP treatment 3 min with 50 kV). The hydrogen bonding force was weakened and the peak intensity of C O and C O stretching vibration groups were enhanced. Therefore, CP-modified cellulose may be applied more in future, such as biological films for food future packaging.
研究领域:
材料科学
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化学工程
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生物质资源利用
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Food Chemistry-X
·
2023
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IF 6.1
Fuqing Bai,Guijie Chen,Huiliang Niu,Hongliang Zhu,Ying Huang,Mingming Zhao,Ruyan Hou,Chuanyi Peng,Hongfang Li,Xiaochun Wan,Huimei Cai
The effects of different brewing water samples, including natural drinking water (NDW), pure water (PW), mineral water (MW), distilled water (DW), and tap water (TW) on flavor and quality of green tea infusion were investigated. The results showed the dissolution rate of mineral substances varied greatly depend on the type of water used. Notably, the tea infusion brewed with MW showed the highest taste response and darker but higher brightness in color. Furthermore, the content of volatile compounds was highest in tea infusion brewed with NDW and lowest in tea infusion brewed with MW. The mineral substances content and pH were the main factors affecting volatile compounds in green tea infusion. Thereinto, Ca 2+ and Fe 3+ remarkably affected the content of alcohols and aldehydes in volatile compounds. These results suggested that water with a neutral pH value and lower mineral substance content is more conducive for brewing green tea.
研究领域:
食品科学
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化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
LANGMUIR
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2021
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IF 3.882
Jianping Tang,Yachao Zhang,Yansheng Yao,Nianwei Dai,Zhangsen Ge,Dong Wu
Aeration is a mass transfer process, in which gas is dispersed into a liquid by utilizing air inflation or agitation. Typically, a microporous device is often used for aeration. Increasing the gas flow rate and decreasing the pore size reduce the bubble size, but the surface wettability of the gas/solid interface also has a significant impact on the bubble size, which is rarely studied. In this study, a superhydrophilic/superhydrophobic Janus aluminum foil (JAF) is fabricated by laser microstructuring and low surface energy modification. The gas-repelling superhydrophilic surface not only facilitates ultrafine bubble generation but also allows the bubbles to detach from the aerator surface quickly, while the superhydrophobic surface prevents water from infiltrating into the aeration chamber and reduces the mass transfer resistance. The micropores with different diameters are obtained by adjusting the laser processing parameters. The pore prepared by the laser is uniform, consequently leading to the uniform bubble size. When the pore diameter is set to 30 μm, the diameter of bubbles released from the superhydrophilic surface of the JAF is only 0.326 mm, and the gas dissolution rate is about six times that of the double-sided superhydrophobic aluminum foil. This simple, low-cost, and controllable method of the laser processing JAF has broad applications in wastewater treatment, energy production, and aquaculture.
研究领域:
环境科学
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材料科学
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生物工程
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
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IF 8.5
Ning Zhang,Lina Yang,Huaying Pan,Siying Xing,Jinxin Li,Hong Song,Dayu Zhou,Chunfang Ma,He Liu
Conventional plastic packaging and chemical preservatives pose risks to both the environment and human health. Consequently, increasing research efforts are directed toward the development of environmentally friendly, non-toxic, and safe packaging materials. In this study, a polyvinyl alcohol (PVA) / pullulan (PUL) / soy hull nanocellulose (SHNC) composite film incorporating 2 % ( w /w) tea polyphenols (TP) was prepared. The composite film exhibited a smooth and dense structure, with hydrogen bonding as the primary intermolecular force. It demonstrated a tensile strength of 52.62 MPa and an elongation at break of 321.45 %. Additionally, the composite film showed enhanced ultraviolet-blocking properties and thermal stability. When immersed in water at 100 °C for 10 min, the film exhibited a dissolution rate of up to 90 %. Notably, it extended the shelf life of dried tofu to 16 days and effectively reduced total volatile basic nitrogen and total viable count levels. The antimicrobial mechanism of the TP-loaded film involved inhibiting Escherichia coli growth by disrupting the bacterial cell membrane, impairing cytoplasmic metabolism, and suppressing protein synthesis. These findings suggest that the PVA/PUL/SHNC/TP composite film holds promise as a sustainable food packaging material.
研究领域:
食品科学
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材料科学
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高分子科学
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纳米技术
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食品包装
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抗菌技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF FOOD BIOCHEMISTRY
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2023
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IF 4
Kun Ma,Jialuo He,Huimin Yuan,Jiayu He,Ming Xiang
Osteoporosis (OP) has been a global health concern, and calcium supplements are still an effective method to relieve the disease. In this study, we investigated the pharmaceutical properties, antiosteoporosis, and adverse effects of a novel calcium supplement named compound calcium carbonate granule (CCCG). The dissolution rate, stability of vitamin D3, and drug permeability of the calcium supplements were explored. And the osteoporosis was constructed in mice with retinoic acid (100 mg/kg/d) for 21 days, and orally treated with CCCG (0.34, 0.68, and 1.36 g/kg/d) for 36 days to evaluate the efficacy against osteoporosis and the occurrence of kidney stones. The results showed that CCCG exhibited higher dissolution rate and better vitamin D3 stability than the standard calcium carbonate granule. CCCG also displayed more absorption in Caco-2 cell model. On the other hand, CCCG alleviated the deterioration in femur microstructure and oxidative stress in the liver and kidney, and increased the expression of bone metabolic markers. CCCG also exhibited lower risk of nephrolithiasis than the commercial calcium carbonate granule. In summary, from the perspectives of both pharmaceutics and efficacy, we illustrated the profiles of an intriguing calcium supplement, which could possibly be an alternative of commonly used ones. Practical Application. Calcium carbonate is widely used to supplement calcium, primarily because of its high calcium load, low cost, and good efficacy. Now, we provided a new calcium supplement named CCCG, which was prepared by inclusion and complexation techniques. Vitamin D3 in CCCG was made into vitamin D-β-cyclodextrin inclusion complex by inclusion technology, which improved the stability of vitamin D3. And calcium carbonate was converted to a water-soluble calcium citrate complex via complexation techniques to accelerate the release of calcium ions and minimize the risk of kidney stone formation. From the perspective of both pharmaceutics and efficacy, we illustrated the profiles of an intriguing calcium supplement, which could possibly be an alternative for the supplemental and preventive treatment of osteoporosis.
研究领域:
药剂学
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药理学
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骨科
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营养学
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动物模型
✓ 已验证
产品关联
DOI
高影响因子
CRYSTAL GROWTH & DESIGN
·
2019
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IF 4.153
Zhen Li,Meiqi Li,Bo Peng,Bingqing Zhu,Jian-rong Wang,Xuefeng Mei
Diethylstilbestrol (DES), a synthetic nonsteroidal estrogen, has been prescribed for advanced breast cancer and prostate cancer. However, its poor compliance, reactive metabolite toxicity and hydrophobicity-induced drug accumulation has limited its applications. In this study, we aimed to modulate its dissolution rate and reduce reactive metabolites and drug accumulation through cocrystallization. Cocrystals of DES with isonicotinamide (INA), picolinamide (PIN), nicotinamide (NIA), urea (UREA), sarcosine (SAR), and flavone (FLA) were obtained. Different crystallization strategies result in cocrystal polymorphs for DES with INA and FLA. Intrinsic dissolution rate (IDR) characterizations in pH 2.0 buffer solution were conducted. Two assumptions (enhancing Cmax or prolonging Tmax) with the aim of improving compliance were put forward. On the basis of the IDR results (DES-NIA with a 1.5-fold increase in IDR and DES-2FLA-B with a 5.5-fold decrease in IDR) and the pharmacological activities of coformers (NIA and FLA with CYPs inhibition and UGTs stimulation effects), the pharmacokinetic behaviors of these two cocrystals were further researched. The 2-fold prolongation of Tmax in the PK profile DES-2FLA-B facilitated an improvement in compliance. In addition, the higher clearance rates and the potential to reduce oxidative metabolites in DES-2FLA-B help to decrease the drug accumulation and reduce the adverse effects of DES.
研究领域:
药学
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药理学
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化学
✓ 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）