SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2023
·
IF 4.4
Zhen Lin,Chuangui Cai,Wei Chen,Qian Deng,Jialin Yang,Kaiyuan Huang,Haohua Deng,Xinhua Lin,Wei Chen,Wensong Yao
Chemiluminescence (CL) intensity of luminol-H 2 O 2 system was dramatically enhanced by cetyltrimethylammonium bromide (CTAB) micelle-mediated 6-aza-2-thiothymine-protected gold nanoclusters (ATT-AuNCs). It is proved that spherical micelles of CTAB in aqueous solution improved the dispersity of ATT-AuNCs, thus enhancing their catalytic activity, which brought in the increased CL intensity of luminol-H 2 O 2 system. Carbazochrome sodium sulfonate (CSS) with a hemostatic containing tetrahydroindole structure broke the spherical micelles and notably quenched the CL intensity of luminol-H 2 O 2 -CTAB-ATT AuNCs system. Based on these results, a simple, fast, and sensitive CL method has been developed for the detection of CSS with a linear range of 0.25–25 μM and a detection limit of 0.11 μM. The method has also been successfully applied to the determination of CSS in serum with satisfied recoveries in the range of 89.6 % to 103.7 %. This study not only provides an effective approach for CSS detection but also paves the way for AuNCs-based CL applications.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Cleaner Production
·
2023
·
IF 11.1
Mingxin Li,Hongling Dai,Peng Zhan,Chaoqun Tan,Zhihui Ning,Fengping Hu,Xing Xu,Xiaoming Peng
Rapid reduction of aqueous Cr(VI) to Cr(III) with waste biomass N-doped lignin charcoals (PLCNx) as a catalyst via mediate oxalic acid (OA) for hexavalent chromium wastewater. The experiment results showed that the PLCN20 composite had the greatest capacity for removing Cr(VI), and the removal rate of Cr(VI) kept higher than 98% when the addition of 5 mM OA in the system. The bubble-shaped structures of PLCNx could act as an electron shuttle mediating the electron transfer and participate in the reduction of Cr(VI), and the N vacancies defects and graphitic N on its surface were a premise for initiating the Cr(VI) reduction process. More importantly, the formation of the Cr(VI)-OA complex facilitated electron transfer as well, which significantly enhanced Cr(VI) reduction. The combined effects of the electron-donating ability of OA and the catalysis of Cr(VI)-OA complex, lead to the enhancement of Cr(VI) reduction on the PLCNx. This work not only offers novel insights into the synthesis of a superior high-efficiency heterostructure for catalyst but also proposes one new mechanism of PLCNx activate OA enhanced catalysis capacity, which helps design and optimize the catalyst process.
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Linfeng Miao,Zhongli Ji,Xuetao Wang,Xiaolin Wu
The fibrous ceramic-based catalytic filter element (CFE) is a promising multifunctional material capable of simultaneously removing dust and NO x from hot gases. In this study, various calcination temperatures and titanium sols with different solid contents were used to prepare CFEs based on microwave drying, and their influences on the catalytic performance were experimentally investigated. The results showed that both the calcination temperature and the solid content of the titanium sol had important impacts on the catalytic activity. As the calcination temperature increased, the particle size, crystallite size , and average pore diameter of the loaded catalyst support (TiO 2 ) increased, while the specific surface area decreased, ultimately resulting in a decline in the catalytic activity. However, a suitable calcination temperature ranging from 300 to 400 °C was required to achieve a good combination between the catalyst and the fibrous ceramic and a relatively uniform mesoporous structure. Furthermore, the increase in the solid content gave rise to a corresponding increase in the TiO 2 loading amount, which increased the pressure drop and reaction surface area of the CFE. Excessive vanadium content caused by insufficient catalyst support induced side reactions of NH 3 oxidation under high-temperature conditions, thereby reducing catalytic activity. Therefore, the preferred calcination temperature and solid content were set at approximately 300–400 °C and 8 wt%, respectively. The final prepared CFE demonstrated superior catalytic performance and adaptable gas velocity properties.
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2023
·
IF 6.6
Xuewen Xie,Jinbo Zhao,Shangtao Liang,Xiong He,Chenghao Yu,Ruzhen Xie,Jiale Xu,Lihui Yang,Dengmiao Cheng,Hui Lin
Herein, we reported using nontoxic Ce for co-doping to reduce the dopant amount of highly toxic Sb, resulting in a boost to the ability of SnO 2 reactive electrochemical membrane (REM) in the oxidation of refractory herbicide atrazine (ATZ). The study found that co-doping Ce causes the expansion of SnO 2 crystal and yields numerous defects on the SnO 2 crystal surface, creating more reactive sites and significantly enhancing the catalytic activity of Sb-doped SnO 2 REM. A single-pass through the Sb, Ce co-doped SnO 2 REM system could reduce ATZ in a real groundwater sample from a 10 μg·L –1 of feed concentration to steadily below the EAP regulatory maximum contaminant level of 14 nM. The addition of high concentrations of chloride and natural organic matters greatly inhibits the oxidation of ATZ, whereas solution pH and bicarbonate have less effect. Quenching experiments demonstrate that hydroxyl radical ( • OH) plays the key role in ATZ oxidation. The degradation by-products of ATZ were identified using high-resolution mass spectrometry , and possible degradation pathways, including • OH‐induced de-alkylation and • OH de-chlorination processes, were proposed based on the by-products’ concentration changes. Biological toxicity tests using freshwater green algae Chlorella vulgaris demonstrated that the toxicity of ATZ effluent was greatly eliminated.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Xichen Liu,Jianghao Wang,Yating Zhang,Dongzhi Zhang
A high-performance hydrogen sulfide sensor is introduced in this paper. CuO/MoSe 2 nanocomposites were synthesized using a simple hydrothermal method , and the sensing properties of CuO/MoSe 2 composite films for H 2 S gas were investigated at 75 °C. The gas sensor test results revealed that the CuO/MoSe 2 composite membrane sensor outperforms the single material sensor in terms of response, response/recovery time, linearity, and long-term stability. The enhanced gas sensitivity of the CuO/MoSe 2 nanocomposite could be attributed to the synergistic effect of the two materials' p-p heterojunction . Using DFT simulation, it was also shown that the CuO/MoSe 2 composite sensor's ability to adsorb H 2 S is superior to that of CuO and MoSe 2 used alone.
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2023
·
IF 4.2
Erhu Li,Xuliang Lin,Shirong Sun,Xueqing Qiu
The highly selective conversion of technical lignin to low-oxygen-content compounds is still challenging due to the presence of methoxy and ether bonds in natural lignin. Herein, tunable ternary deep eutectic solvents (DESs) containing choline chloride, oxalic acid, and another bifunctional reagent with a hydrogen-bond donor and nucleophilic function were used for the β-aryl ether bond cleavage or Cα-etherification of lignin followed by pyrolysis to improve the yield of methoxy-free lignin monomers. The relationship between the lignin structure and pyrolysis behavior was investigated by 2D-NMR, FTIR, GPC, XPS, TGA, TG-FTIR, EPR, etc. The DES pretreatment changed the pathway of lignin pyrolysis toward a higher yield of bio-oil and methoxy-free products. Compared with technical lignin, the yield of phenolic products after Cα-etherification with ethanol and ethylene glycol as nucleophilic reagents increased from 0.73 × 1011 to 4.10 × 1011 and 5.56 × 1011 area/mg, respectively. Besides, the introduction of ethanol and ethylene glycol is more conducive to the demethoxylation of pyrolysis products and the formation of methoxy-free phenols during pyrolysis. This work realizes the conversion of lignin to high-value phenolic products with low-oxygen-content compounds without adding catalysts by a pyrolysis strategy.
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2023
·Vol. 14
·期 1
·1-11
·
IF 16.6
Hu Changjiang,Jiang Zhiwen,Wu Qunyan,Cao Shuiyan,Li Qiuhao,Chen Chong,Yuan Liyong,Wang Yunlong,Yang Wenyun,Yang Jinbo,Peng Jing,Shi Weiqun,Zhai Maolin,Mostafavi Mehran,Ma Jun
The efficient use of renewable X/γ-rays or accelerated electrons for chemical transformation of CO 2 and water to fuels holds promise for a carbon-neutral economy; however, such processes are challenging to implement and require the assistance of catalysts capable of sensitizing secondary electron scattering and providing active metal sites to bind intermediates. Here we show atomic Cu-Ni dual-metal sites embedded in a metal-organic framework enable efficient and selective CH 3 OH production (~98%) over multiple irradiated cycles. The usage of practical electron-beam irradiation (200 keV; 40 kGy min −1 ) with a cost-effective hydroxyl radical scavenger promotes CH 3 OH production rate to 0.27 mmol g −1 min −1 . Moreover, time-resolved experiments with calculations reveal the direct generation of CO 2 •‒ radical anions via aqueous electrons attachment occurred on nanosecond timescale, and cascade hydrogenation steps. Our study highlights a radiolytic route to produce CH 3 OH with CO 2 feedstock and introduces a desirable atomic structure to improve performance.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Fengzhan Si,Yan Zhang,Yue Liang,Xiaomin Kang,Jianwen Liu,Xian-Zhu Fu,Jing-Li Luo
Water decomposition is the most promising system for developing renewable energy, but the sluggish kinetics of the oxygen evolution reaction (OER) is the key limiting factor. Recently, inorganic nanomaterials have been widely used as an effective catalyst for the stimulation of OER kinetics, for which the subsequent dispersion and the current collector are essential. We present a three-dimensional NiFe-layered double hydroxide (NiFe-LDH) synthesized by electrochemical corrosion , with increased electrochemical performance for electrocatalytic water splitting. Electrochemical measurements reveal that the NiFe-LDH has a lower Tafel slope of 46 mVˑdec −1 compared with the NiFe foam. The resulting electrode had a current density of 50 mAˑcm −2 and a remarkably low overpotential of 150 mV. Theoretical calculations and experimental observations showed and explained NiFe-LDH-90 electrode has high alkaline medium endurance, implying excellent OER electrocatalytic activity . The produced composite is expected to bring new insights into the design of foam electrocatalyst materials for OER.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Honghu Li,Nuoya Chen,Weifeng Liu,Huazhang Feng,Jingyun Su,Dongju Fu,Xuguang Liu,Mingxia Qiu,Luyang Wang
The prosperity of the lithium-ion battery industry has raised deep concerns about spent batteries. Recently, much attention has been focused on the development and advancement of lithium battery recycling. Deep eutectic solvents are efficient, environmentally friendly, and economical leaching solvents with great potential for the recovery of cathode materials from spent lithium-ion batteries. However, to date, deep eutectic solvents have been considered a disposable agent for lithium-ion battery recycling, resulting in organic waste after a single recycling. Here, we demonstrate a reusable deep eutectic solvent based on maleic acid (MA) and ethylene glycol (EG), designed to recycle LiCoO 2 cathode materials from spent lithium-ion batteries. With a high loading capacity (59 g/L), the leaching efficiencies of Co and Li by MA:EG are 98.3 % and 98.4 % respectively. MA:EG can be refreshed by adding oxalic acid as a precipitant. Even after 4 cycles, the leaching efficiency of Co is still 90 % and the average recovery efficiency of Co products is over 96.5 %. Lithium is present in a high concentration and is also recovered in the form of oxalate. This work provides a novel and environmentally friendly recycling route that can economically and efficiently recover the valuable metals Li and Co from spent lithium-ion batteries.
✓ 已验证
产品关联
DOI
高影响因子
POLYMER COMPOSITES
·
2023
·Vol. 44
·期 11
·8049-8062
·
IF 5.2
Xiu Wang,Meiling Yan,Jun Yu,Weiang Luo,Guorong Chen
Paraffin is a potential thermal energy storage material, but leakage and flammability are the two major problems affecting its storage and safe use. Here, a novel flame retarded paraffin/epoxy resin composite was developed by using paraffin, epoxy resin and hollow metal organic framework (W-UiO66-PPA) as thermal energy storage material, supporting material and flame retardant, respectively. The thermal energy storage and flame retardancy performances were examined with differential scanning calorimetry, vertical burning, limiting oxygen index and cone calorimeter tests. The results show that the paraffin/epoxy resin retains intact without leakage when the content of paraffin reaches 40 wt%, and this material exhibits high melting latent heat and remarkable thermal recycling property. In addition, the flame retarded paraffin/epoxy resin shows excellent flame retardancy, which is attributed to the following three aspects: (1) the hollow structure with open vertices of W-UiO66 is capable of absorbing and collecting the combustible gasses produced by the combustion of epoxy resin; (2) the Zr and W elements of W-UiO66 can facilitate catalytic charring and form a dense char layer; (3) phosphorous-containing free radicals are able to capture OH· and O· free radicals during the combustion of paraffin and epoxy resin, thus interrupting the combustion chain reaction. On the whole, the flame retarded paraffin/EP possesses excellent thermal energy storage, thermal recycling, and flame retardancy properties. Our work provides a fantastic inspiration for the rational design of other flame retarded form-stable phase change materials.
✓ 已验证
产品关联
DOI
高影响因子
ACS Omega
·
2023
·
IF 4.1
Daniu Cai,Guangcai Zhang,Dongliang Hu,Jianyang Li,Minggong Wang,Yingwu Zhang,Junsheng Yuan
For the separation of metal ions, ionic liquid-based aqueous biphasic systems (IL-ABSs) offer a promising alternative to solvent extraction. However, the incorporation of an extensive quantity of inorganic salts restricts their practical application. Because heavy metal wastewater often contains high concentrations of inorganic salts, it offers good prospects for the application of IL-ABSs in the separation of heavy metals. In this work, an IL-ABS was formed by tributyltetradecylphosphonium chloride ([P44414]Cl), and simulated high-salinity wastewater (NaCl and Na2SO4 as the main inorganic salts) was used for the separation of heavy metals. The phase diagram results indicated that the formation of a two-phase system required a relatively high salt concentration. The extraction process followed the mechanism of anion exchange; thus, heavy metals such as zinc and cadmium that formed complexes with chloride ions could be effectively extracted (extraction rate >99.5%) with a very fast rate (extraction time <1 min) at a wide pH range (pH = 2–7). After extraction, the metals could be stripped well (stripping rate >99.5%) after contact with the NaOH solution. This research provided a new approach for treating heavy metals in high-salinity effluents, which has the advantages of IL-ABS and avoids the disadvantages of adding large amounts of inorganic salts at the same time.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Food Bioscience
·
2023
·
IF 5.2
Shijin Xiong,Dandan Qiu,Xiaoyan Xu,Tonghao Du,Zhen Peng,Muyan Xiao,Tao Huang,Jinqing Huang,Hongbing Ren,Mingyong Xie,Tao Xiong
Laotan Suancai is a well-known Chinese traditional fermented vegetable with a unique flavor. However, there are significant differences in the quality of Laotan Suancai pickled by jars (LTSC-J) and pools (LTSC-P) on an industrial scale. To reveal the effect of fermentation craft on Laotan Suancai quality, the microbial community, flavor metabolites, and physicochemical properties of the two types of Laotan Suancai, as well as their interrelationship were investigated. LTSC-P had higher salinity, glucose content, and histidine content, while LTSC-J had higher TA, lactic acid content, and isobutyric acid content. Nine differential aroma-active compounds were found between the two types of Laotan Suancai: anethole , eucalyptol, diallyl sulfide, estragole, diallyl disulfide , eugenol, linalool, nonanal , and ethyl butyrate. LTSC-P showed a higher relative abundance of Weissella , Acinetobacter , Pseudomonas , Allorhizobium-Neorhizobium-Pararhizobium-Rhizobium , Inhella , and Leuconostoc compared to LTSC-J. Co-occurrence analysis indicated the distinct differences in the co-occurrence patterns of the microbial network across the two types of Laotan Suancai. RDA analysis indicated that glucose, salinity, TA, maltose , and nitrite were the main drivers for the differences in bacterial communities between the two types of Laotan Suancai. Spearman correlation analysis revealed strong correlations between 18 bacteria and 61 flavor compounds. Finally, bacterial metabolic function prediction indicated that sulfide and aromatic ester may be biosynthesized by sulfur metabolism , cysteine and methionine metabolism, pyruvate metabolism, and butanoate metabolism. Overall, these findings provide important guidance for improving the manufacturing and quality of Laotan Suancai.
✓ 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）