ELECTROCHIMICA ACTA
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2023
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IF 6.6
Yemiao Gao,Shuhan Gao,Xinyang Pang,Dongdong Chu,Weixia Zhu,Jiajia Huang
Zinc-iodine batteries (ZIBs) still suffer from severe shuttle effects and sluggish reaction kinetics of the iodine species, which result in inferior cycle life and unsatisfactory rate performance. Although physical immobilization and chemical adsorption had been used to confine iodine species, the redox kinetics of iodine in ZIBs still needed to be improved. Herein, cobalt (II) phthalocyanines (CoPc) were loaded on actived carbon fiber (ACF) uniformly via π-π interaction and served as I 2 support to fabricate CoPc-ACF/I 2 cathodes materials of ZIBs. Actived carbon fiber (ACF) as effective catalyst support can achieve high dispersion of cobalt phthalocyanine (CoPc) while maintaining high conductivity of composite, and its favorable porous structure is also conducive to iodine loading. The electrocatalytic effect of CoPc can significantly reduce energy barriers and simultaneously accelerate charge transfer to achieve a faster reaction kinetic process for iodine reduction reactions. In particular, the CoPc-ACF matrix shows a remarkably lower Tafel slope (253.4 mV dec −1 ) and lower energy barrier (18.04 kJ mol −1 ) compared with the ACF matrix (395.69 mV dec −1 and 36.25 kJ mol −1 ) for the iodine redox reaction. Consequently, the CoPc-ACF/I 2 cathode delivers a specific capacity of 203.6 mAh g −1 at 0.5 A g −1 , an excellent rate capability with 151.4 mAh g −1 achieved even at 15 A g −1 , and ultra-stable cycle life over 8000 cycles with 89.2% capacity retention. This work provides fresh insight into the design and development for achieving ZIBs with high performance.
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Materials Science and Engineering B-Advanced Functional Solid-State Materials
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2023
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IF 3.6
Yaling Chai,Caichao Wan,Wenjie Cheng,Qi Zeng,Xuanze Li,Yiqiang Wu
Common Pt-based electrocatalysts have the disadvantages of high cost and easy deactivation. The research focus will be the development of carbon-based counter electrodes (CEs) due to the high conductivity and stability in the electrolytes. This paper prepares a kind of CE with wood-derived pore-rich carbon (WDPRC), which uses poplar as the precursor and activates with KOH at different temperatures (700, 800, and 900 °C). 800-WDPRC (800 represents temperature) had a large specific surface area of 1234.30 m 2 /g, which shows that it has a rich pore structure, and provides more active sites for the reaction. And the DSSCs’ PCE with 800-WDPRC (5.99%) is higher than the wood-derived carbon (WDC) (carbonize at 800 °C and without activation) (2.32%). As for the CEs’ materials, the WDPRCs’ manufacturing process is simple (only two steps), and the materials used are environment-friendly and low in price. Therefore, this paper provides a new idea for preparing clean and efficient DSSCs’ CEs.
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CHEMICAL ENGINEERING JOURNAL
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2023
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IF 15.1
Jing Luo,Chenghao Zhang,Wei Liu,Bingqi Xie,Jisong Zhang
2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) has vital applications in the field of multiphase reaction, especially for the aerobic oxidation of alcohols. Activated carbon (AC) has a porous structure, rigid surface property, and low cost, which was the prominent carrier for TEMPO immobilization to produce the heterogeneous catalyst. However, the brilliant strategy of TEMPO immobilization on AC for long-term aerobic oxidation of alcohols was still challenging. In this work, surface-formylation and reductive amination were conducted to achieve the covalent TEMPO grafting on AC, which opened up a novel routine for surface modification and preparing heterogeneous catalysts based on carbon materials. The catalysts were packed in a micro-packed bed reactor to perform continuous aerobic oxidation of various alcohols. The catalytic performance of benzyl alcohol to benzaldehyde (turnover number: 1160.6, turnover frequency: 99.6 h −1 ) was much superior to those in the literature by using covalently grafted heterogeneous TEMPO catalysts.
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JOURNAL OF CULTURAL HERITAGE
·
2023
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IF 3.1
Kuanrong Zhai,Bingjian Zhang,Longguan Zhu
To improve the performance of lime mortar, ancient craftsmen often added various additives to mortars, including inorganic and organic materials. The analysis of mortar additives plays an important role in the conservation and restoration of historical buildings. However, it is quite difficult to accurately identify the species of additives. This paper proposed a series of semi-quantitative analytical procedures to identify the organic additives in ancient lime mortars. By using reagents such as phenolphthalein, periodic acid, acetylacetone, anthrone, bicinchoninic acid (BCA), iodine-potassium iodide, chloramine T, etc., organic additives such as triglyceride, soluble sugar, starch, and protein (including blood, gelatine, and other unknown proteins) remaining in ancient lime mortar were accurately detected, respectively. The linear relationship of the standard curve was significant, and the detection limits for the target additives were below 7 µg/mL. The process is easy to operate within 6 h, and it is suitable for rapid in-situ testing.
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INORGANIC CHEMISTRY
·
2022
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IF 5.436
Amir Said,Caiyun Liu,Chang Gao,Dexin Wang,Huihui Niu,Yanshu Liu,Guo Wang,Chen-Ho Tung,Yifeng Wang
The CO2 cycloaddition to epoxides is an efficient method for CO2 capture and storage, important not only for reducing greenhouse gas emission but also for producing cyclic carbonates, which are valuable industrial materials. In this study, we report a novel high-nuclearity titanium oxide cluster (TOC) inlayed with main-group element Pb2+, H2Ti16Pb9O24(SA)18(DMF)10(OH2)2 (denoted as 1; SA = salicylate; DMF = N,N-dimethylformamide), which has the property of visible-light absorption and has shown high catalytic activities for cycloadditions of CO2 under visible-light irradiation. The cluster was synthesized in a high yield in a facial solvothermal process. Its structure and electronic structure were characterized by single-crystal X-ray diffraction, density functional theory calculations, and complementary techniques. The cycloaddition reactions were performed under solvent-free conditions. While the catalytic activity due to the Lewis acidity was moderate, visible-light irradiation further folded the reaction rates. The turnover number reached 3400 with a turnover frequency of 120 h–1. Mechanism studies indicated a synergistic effect of the Lewis acidity and photogenerated charge carriers. The performance of 1 in reversible I2 uptake was also investigated. This study demonstrates the high potential of heterometal-decorated TOCs in the cost-effective and efficient CO2 cycloaddition reaction under mild conditions.
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LANGMUIR
·
2022
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IF 4.331
Bin Fu,Yingchao Ma,Ruiting Li,Xiaodong Lian,Shenglong Liao,Yapei Wang
In an effort to prevent or minimize icing hazards, techniques and materials for icing inhibition and deicing have always been highly favored throughout human history. This work discovers the integrated anti-icing and deicing effects of poly(styrene-b-butadiene-b-styrene) triblock rubber (SBS) after its easy oxidation in iodine vapor. Iodine oxidation happens on the block of polybutadiene, featured by the conversion of SBS from hydrophobic to amphiphilic and the improved capability of photothermal conversion. The oxidized SBS can serve as a polymer coating, which possesses intriguing abilities to delay the kinetics of icing on its surface and repel the ice under light illumination. According to characterizations of surface chemistry and mechanical performance, iodine oxidation is assumed to involve the processes of iodine coordination to unsaturated bonds, the formation of radical cations as a result of the redox reaction between iodine and unsaturated carbon–carbon bonds, improved light absorption owing to the formation of polyiodide anions, and intermolecular coupling of radical cations. The appearance of polar moieties/species within the oxidized SBS is attributed to the delayed ice nucleation. The significant photothermal capacity in visible and near-infrared windows enables the iodine-oxidized SBS coating to remove the adhered ice by melting under light illumination when the icing process is inevitable, even at an extremely low temperature (−25 °C).
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Food Science and Human Wellness
·
2022
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IF 8.022
Yifei Liu,Xintao Yin,Xiudong Xia,Zhen Liu,Lifei Chen,Mingsheng Dong
In this study, a new type of 3D printed living biological hydrogel was developed by integrating lactic acid bacteria (LAB) into biocompatible and non-toxic polymer materials. Interestingly, the living materials loaded with LAB can be freeze-dried and reused for more than 100 times. The bio-hydrogel can be used to co-culture different LAB and keep its fermentation performance stable in long-term use. The release kinetics model and response surface method were used to simulate and optimize the bacteria release mode in the bio-hydrogel. The results show that the release of bacteria from hydrogel is regulated by the coupling of Fickian diffusion and polymer swelling. The stability of LAB hydrogel was evaluated by reuse experiments. The images of confocal microscopy and scanning electron microscope showed that the bacteria with high cell viability were distributed in the hydrogel and intact structure of the living hydrogel was maintained after 100 times of reuse as yoghurt starter. In conclusion, the 3D printed LAB bio-hydrogel developed in this study has the advantage of reuse and sustainability, which is expected to open up a new way for the preparation of food culture starter.
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BIOMACROMOLECULES
·
2022
·
IF 6.978
Chunying Si,Guoming Hu,Wei Jiang,Ping Sun,Jingjing Cao,Ruixiang Ji,Ai-Min Li,Quanxing Zhang
As the utilization of degradable polymer coatings increased, the accompanying trade-off between good degradability and high-efficiency antidiatom adhesion due to their hydrophobic nature remains unresolved. The study presents a new hydrophobic surface-fragmenting coating consisting of degradable hyperbranched polymers (hereafter denoted as h-LLAx) synthesized by reversible complexation-mediated copolymerization with isobornyl acrylate (IBOA) and divinyl-functional oligomeric poly(l-lactide) (OLLA-V2), both derived from biomass, that exhibited superior resistance (∼0 cell mm–2) to marine diatom Navicula incerta (N. incerta) attachment with higher OLLA content. The combined impact of the microscale hollow semisphere micelles that self-assembled degradable hyperbranched copolymers and hydrolysis-driven self-renewable surfaces following immersion in seawater may account for the remarkable resistance of h-LLAx coatings against N. incerta. Detailed investigations were conducted across multiple perspectives, from hydrolytic degradation to broad-spectrum antibacterial attachment to ecotoxicity assessment. The excellent features of high resistance to marine diatoms and bacterial attachment, degradability, and environmental friendliness make the as-prepared h-LLAx coatings widely sought after for antifouling coating applications.
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ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Dingyang Chen,Tingting Ma,Xinyue Zhao,Xiaofei Jing,Rui Zhao,Guangshan Zhu
Efficient capture of radioiodine from aqueous solutions is of importance for sustainable development of nuclear energy and protection of the environment. However, current adsorbents under exploration suffer from limited adsorption capacity and powder form that are unfavorable for practical applications. Herein, we applied a “multi-functionalization integration” idea to construct novel electrospun fiber adsorbents (N-MOF-PAN fibers) containing cationic quaternary ammonium groups, uncharged amine groups, and porous MOF material (UiO-66-NH2), which in synergy adsorb iodine effectively from both saturated I2 aqueous solution and I3– aqueous solution. Iodine species (94.6%) could be removed from saturated I2 solution within 180 min, and 98.7% of iodine species were captured from I3– solution within 240 min. Additionally, the N-MOF-PAN fibers exhibited high iodine uptake capacities of 3.56 g g–1 from a concentrated KI/I2 aqueous solution and 3.61 g g–1 from the Langmuir isotherm model, surpassing many reported iodine adsorbents in the aqueous medium. Characterization and mechanism analysis indicated that multiple active sites simultaneously attribute to the high binding affinity toward iodine species through physical adsorption and chemical adsorption. Furthermore, benefiting from their macroscopic architecture, N-MOF-PAN fibers were used as the adsorption column for dynamic iodine capture with a bed volume of 1490 mL, which is much higher than commercially activated carbons. Overall, this work provides guidance for the development of novel fiber adsorbents for related applications.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
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IF 9.136
Sheng Liu,Yiyang Zeng,Jun Liu,Jiamao Li,Hao Peng,Hui Xie,Hao Zou,Chengjian Xiao,Xiaohui Hua,Jingliang Bao,Liang Xian,Yuanli Li,Fangting Chi
The capturing and storage of iodine from nuclear waste through secure and advantageous techniques are significant. In this work, a novel bismuth-based porous carbon material referred to as Bi@MVF is elaborately synthesized employing a dipping-reduction technique to seize iodine-129 ( 129 I), in which bismuth particles are uniformly embedded and allotted on the porous carbon network as multiple active sites. Accordingly, Bi@MVF lets in a highly-efficient iodine absorption potential of up to 1560 mg/g after publicity to iodine at 120 ℃ for 4 h, superior to most standard iodine adsorbents. The excessive adsorption kinetics of these Bi@MVF adsorbents is typically attributed to the specific porous carbon substrates' full-size particular surface area and the adsorbent’s synergistic effect. An in-depth perception of the iodine adsorption mechanism exhibits that the chemical adsorption turns into a powerful mechanism via the reaction between bismuth and iodine to structure a steady section BiI 3 . Moreover, an easy post-treatment system for these Bi@MVF adsorbents is adopted to gain the greater corrosion-resistant iodine-binding segment Bi 5 O 7 I, attaining a nominal iodine leaching rate. Therefore, the designed Bi@MVF will be a tremendous 129 I stabilizer, and we will contribute a new approach for customizing new iodine adsorbents with excessive adsorption doses.
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JOURNAL OF POLYMER RESEARCH
·
2022
·Vol. 29
·期 12
·1-11
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IF 3.061
Yang Xiao,Duan Lian,Ran Xiaoqi,Ran Boli,Yi Shixiong
Conjugated microporous polymers (CMPs) have attracted great interest due to their high surface area, porosity and conjugacy, which could be potentially applied in pollutant adsorption, heterogeneous photocatalysis and super capacitor. Iodine 129 ( 129 I) and iodine 131 ( 131 I), as the common volatile radioactive products in nuke waste, have a long radioactive half-life, which is an important issue all the time. Here, two novel conjugated microporous polymers (TPAsTr-CMP and TPAPyD-CMP), which are rich in N element, were synthesized via Suzuki reaction and characterized through FTIR, 13 C NMR, SEM, TGA and etc. The surface areas calculated by BET are 449.1 m 2 /g for TPAsTr-CMP and 15.6 m 2 /g for TPAPyD-CMP, respectively. The iodine adsorption experiments at 350 K exhibited that the iodine uptake of TPAsTr-CMP was up to 3.52 g/g; while TPAPyD-CMP had the iodine uptake of 2.84 g/g. For dissolved iodine in cyclohexane, the TPAPyD-CMP performed a better adsorption capacity than TPAsTr-CMP. The adsorption capacity of TPAPyD-CMP was 333.8 mg/g, when initial iodine concentration was 500 mg/L, while that of TPAsTr-CMP was only 104.3 mg/g. The adsorption capacity to iodine should be attributed to their high surface area, effective adsorptive sites and expanded π-conjugated network.
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Nature Communications
·
2022
·Vol. 13
·期 1
·1-11
·
IF 17.694
Zhang Zishuai,Zhu Yilong,Yu Miao,Jiao Yan,Huang Yan
Rechargeable aqueous metal||I 2 electrochemical energy storage systems are a cost-effective alternative to conventional transition-metal-based batteries for grid energy storage. However, the growth of unfavorable metallic deposition and the irreversible formation of electrochemically inactive by-products at the negative electrode during cycling hinder their development. To circumvent these drawbacks, herein we propose 3,4,9,10-perylenetetracarboxylic diimide (PTCDI) as negative electrode active material and a saturated mixed KCl/I 2 aqueous electrolyte solution. The use of these components allows for exploiting two sequential reversible electrochemical reactions in a single cell. Indeed, when they are tested in combination with an active carbon-enveloped I 2 electrode in a glass cell configuration, we report an initial specific discharge capacity of 900 mAh g −1 (electrode mass of iodine only) and an average cell discharge voltage of 1.25 V at 40 A g −1 and 25 \(\pm\) 1 °C. Finally, we also report the assembly and testing of a PTCDI|KCl-I 2 |carbon paper multilayer pouch cell prototype with a discharge capacity retention of about 70% after 900 cycles at 80 mA and 25 \(\pm\) 1 °C.
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