RSC Advances
·
2016
·Vol. 6
·期 40
·33580-33588
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IF 3.289
Baodeng Wang,Zhongzheng Zhang,Chenming Zhu,Lina Zhang,Nannan Sun,Wei Wei,Yuhan Sun
Highly dispersed potassium species were introduced on a mesoporous carbon surface following an oxidation and subsequent ion exchange protocol. The samples were characterized and their CO2 adsorption performance was systematically evaluated by both static and dynamic adsorption tests. It was found that the generated surface functionality can be tuned by controlling the reaction temperature and/or using different oxidant(s), and thus potassium species can be introduced in an adjustable way without significant alteration on the textural properties of the samples. Although adsorption at atmospheric pressure was not influenced, low pressure CO2 uptake and adsorption selectivity were considerably enhanced by potassium introduction owing to the highly dispersed potassium species. A high CO2 adsorption capacity of 5.9 wt% was achieved at 25 °C and 0.15 bar with excellent cyclic stability, and the adsorbents can be readily regenerated at 115 °C under N2 purging.
研究领域:
材料科学
·
环境科学
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DOI
高影响因子
Inorganic Chemistry Frontiers
·
2019
·Vol. 6
·期 8
·2118-2125
·
IF 5.934
Xianglong Huang,Wei Wang,Jianhua Deng,Wei Gao,Dingyu Liu,Qianru Ma,Maowen Xu
In this study, a novel hollow carbon matrix was designed and prepared using a facile NaCl crystal template for the effective encapsulation of Se. This superior carbon electrode plays a significant role in facilitating sufficient energy storage and conversion of Se-based cathode materials. A large specific surface area of 416 m2 g−1 was obtained, and the matrix provided numerous hollow spheres for the storage of Se. The thermogravimetric analysis and electrochemical results show that the as-prepared Se-hollow porous carbon composite with an ideal Se content of 42% can make excellent capacity contribution. The hollow porous structure not only effectively accommodates the volumetric expansion during the discharge–charge process but also makes the composite have a good contact with the electrolyte. In addition, the 3D open framework structure can be conducive to fast electron transportation. As a result, the Se-hollow porous carbon composite exhibited outstanding electrochemical performance when evaluated as a cathode material for rechargeable K–Se batteries.
研究领域:
材料科学
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能源存储与转换
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DOI
高影响因子
Materials Research Express
·
2021
·Vol. 8
·期 3
·035507
·
IF 1.62
Shi Li,Tao Guo,Miao Yao,Wen Ding,Jialin Chen,Jiaxing Song,Sheng Zhang,Rui Zhu
To study the effect of the addition of potassium perchlorate (KClO4) on the performance of nano thermites, Al/Bi2O3 nano thermites with different mass fraction (wt%) of KClO4 was made by ultrasonic dispersion method. Then, all samples were tested by SEM, DSC and rapid excitation ignition. DSC results showed Al/Bi2O3/10 wt%KClO4 had the highest heat release. Compared with Al/Bi2O3, the heat release increased by 28.32%. The results of activation energy calculations showed Al/Bi2O3/30 wt%KClO4 had the lowest activation energy (Ea). Its activation energy was reduced by 30%, mere about 149.17 KJ mol−1. Finally, it can be seen from the combustion situation that the addition of KClO4 reduced the intensity of burning. This work found a way to increase the heat release or reduce the activation energy of nano thermites by controlling the amount of KClO4 added.
研究领域:
材料科学
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燃烧学
·
化学工程
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DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2022
·
IF 4.326
Jiamin Huang,Guanghui Zhang,Jie Zhu,Mingrui Wang,Fanshu Ding,Chunshan Song,Xinwen Guo
The catalytic conversion of CO2 to higher alcohols (HAs, representing ethanol and alcohols with more than two carbon atoms) has been of great interest to mitigating the greenhouse effect and effectively utilizing CO2. However, most present catalysts have disadvantages of poor activity (conversion less than 30%) and selectivity (less than 10%) and high price. Herein, we report a Mn- and K-modified iron carbide catalyst that offers a CO2 conversion higher than 40% and a selectivity of higher alcohols exceeding 10%, and the proportion of propanol and butanol in alcohol products is more than 30%. Unpromoted iron carbide has a strong ability of hydrocarbon chain growth, leading to the fast formation of hydrocarbon products rather than HAs. However, on the Mn- and K-modified iron carbide catalyst, K is used to increase the surface C/H ratio of the catalyst by enhancing the adsorption of CO2 on the catalytic surface. The increased C/H ratio is indispensable to the formation of HAs, and the addition of Mn promoter dramatically improves the production of HAs, especially the formation of propanol and butanol. The synergistic effect between Mn and K on iron carbide is the key to produce HAs. In addition, the Mn- and K-modified iron carbide is of low cost, which can potentially provide an alternative for the hydrogenation of CO2 to produce valuable chemicals.
研究领域:
催化化学
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环境科学
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能源科学
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DOI
高影响因子
ChemCatChem
·
2021
·Vol. 14
·期 3
·e202101716
·
IF 5.686
Yingying Zhang,Haibo Zhu,Qiangwen Fan,Liu Yang,Zongbo Xie,Zhang-Gao Le
Graphical Cobalt catalysis : An efficient cobalt-catalyzed redox-neutral sulfonylative coupling of boronic acids and ammonium salts to afford (hetero)aryl alkyl sulfones by using potassium metabisulfite has been realized. Various functional sulfones were obtained by using commercially available and air-stable CoCl 2 in combination with phenanthroline ligand. In addition, various carbon based electrophiles, including diaryliodonium salts, heteroaryl halides, and carbonates were compatible. This redox-neutral catalytic transformation proceeds well without additional base and shows broad functional-group tolerance. An efficient cobalt-catalyzed redox-neutral sulfonylative coupling to afford (hetero)aryl alkyl sulfones from boronic acids, ammonium salts and potassium metabisulfite has been realized. Commercially available and air-stable CoCl 2 , in combination with phenanthroline ligand, is sufficient to achieve rapid and high-yielding conversion of the reactants into the corresponding sulfones. This practical transformation proceeds smoothly through C−N bond cleavage under redox-neutral catalytic conditions and shows broad functional-group tolerance. Other carbon based electrophiles, including diaryliodonium salts, heteroaryl halides, and carbonates were compatible. Further transformation of aryl alkyl sulfones then allows conversion into olefins, alkenyl sulfones and halogenated sulfones, respectively, in a one-pot process.
研究领域:
有机化学
·
催化化学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Irfan Ijaz,Aysha Bukhari,Ammara Nazir,Ezaz Gilani,Hina Zain,Attia Shaheen,Mohammed Rafi Shaik,Mujeeb Khan
Lowering the threat of antibiotics is a hot issue in environmental chemistry. To overcome this problem, a novel MBene-based adsorbent, DTT@BC@MoBT x , was designed by modification of bacterial cellulose (BC) using MoBT x MBene and 1,4-dithiothreitol (DTT). Several characterization methods, including Fourier transforms infrared (FTIR), X-ray photoelectron spectroscopy (XPS), and X-ray Diffraction (XRD), confirmed the successful synthesis of DTT@BC@MoBT x composite. It was discovered that the abundance of functional groups, higher specific surface area, and porosity were facilitative for DTT@BC@MoBT x adsorbents to indomethacin (IDM) and losartan (LP). The adsorption of IDM and LP well fitted to the pseudo-second-order kinetic model and Langmuir isotherm model, suggesting the single-layer chemisorption occurred on the adsorbent. The maximum sorption capabilities of the DTT@BC@MoBT x adsorbent were 1041.26 mg/g for IDM and 887.31 mg/g for LP, indicating excellent adsorption performance. The adsorption capacities of IDM and LP showed a slight decline after four consecutive adsorption-desorption tests, indicating excellent regeneration ability and stability. Interfering monoanionic (Na + and K + ) and monoanionic (Cl − and NO 3 − ) exhibited negligible impacts on IDM and LP elimination rates at all three concentrations. Additionally, it was discovered that metal ions had a greater ability for interference in a higher valency state (Mg 2+ , Ca 2+ , SO 4 2− , and CO 3 2− ) than in a lower valency state (Na + , K + , Cl − , and NO 3 − ). The adsorption processes of IDM and LP by the DTT@BC@MoBT x adsorbent involved hydrogen bonding and electrostatic attraction, as shown by FTIR and XPS analyses. This work offered a novel MBene-based adsorbent for the quick and effective adsorption of IDM and LP from water.
研究领域:
环境化学
·
材料科学
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yunqi Wu,Tinggui Yan,Weixue Xiang,Peixu Zhu,Nanxi Luo,Banglian Tang,Miao Luo
Co-combusting biomass with sewage sludge can effectively inhibit the release of alkali metals. In addition to calcium phosphates, AlPO 4 and FePO 4 are typical phosphates in fresh sludge, resulting from phosphorus removal process compliant discharge. However, the inhibitory effect of AlPO 4 and FePO 4 on potassium release have rarely been studied. This oversight may stem from the absence of AlPO 4 and FePO 4 in high-temperature ash, which instead indicates their preferred reactivity. Thus, we proposed the hypothesis regarding whether the fixation effect of AlPO 4 and FePO 4 on potassium occurs earlier than that of calcium phosphate. This research investigated the interactions and inhibitory effects of these phosphates on potassium release during the co-combustion. In this simplified system using model compounds, the conversion of volatile potassium salts was quantitively assessed by measuring the content of produced water-soluble K-phosphates. The interaction mechanism has been discussed with multiple characterization methods. The results demonstrate a significant inhibitory effect of phosphates on KOH, KNO 3 and K 2 CO 3 , with the effectiveness ranking as follows: AlPO 4 > FePO 4 > Ca 3 (PO 4 ) 2 . Over 80 % of potassium remained as soluble K-phosphates in samples treated with AlPO 4 or FePO 4 at 1000 ℃. In contrast, none of the three additives exhibited a significant inhibitory effect on KCl and K 2 SO 4 . However, the priority of the reactions converting KOH, KNO 3 and K 2 CO 3 into K-phosphates by using AlPO 4 and FePO 4 , along with the stability of the produced phosphates, suggests a promising approach to enhance the formation of more potassium phosphate while reducing KCl—the most problematic volatile component—thereby effectively mitigating potassium release.
CAS / MDL:
研究领域:
环境科学
·
能源与燃料
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2025
·
IF 2.5
Sujing Zou,Xu Lu,Xiqiang Mao,Lei Wu,Jun Li,Shaoyi Li,Jian Yang,Ximei Fan
In photocatalysis, the construction of double Z-type heterojunction can effectively improve the photogenerated carrier separation efficiency, enhance the light absorption capacity and improve the photocatalytic reaction rate. Herein, a series of TiO2/KWO/BiOBr photocatalysts are successfully synthesized via hydrothermal and electrostatic self-assembly method. All the samples are investigated and characterized by X-ray diffraction, Scanning electron microscopy, Ultraviolet–visible spectroscopy and X-ray photoelectron spectroscopy to insight into the microstructures and optical properties. During the photocatalytic degradation of toluene experiments, the optimized TiO2/KWO/BiOBr sample exhibits the excellent photocatalytic performance. Under the irradiation of xenon lamp for 120 min, degradation rate of toluene reaches 95%, which is 10.75, 7.12 and 7.41 times higher than that of TiO2, KWO and BiOBr, respectively. The UV–vis diffuse reflectance, electrochemical impedance spectroscopy and transient photocurrent response of the TiO2/KWO/BiOBr photocatalyst verify that the enhanced photocatalytic activity is ascribed to its expanded light absorption range and the efficient separation efficiency of photogenerated carriers. In addition, the degradation experiments of toluene are also carried out in different atmospheres which could control the formation of different free radicals. It shows that superoxide anions and hydroxyl radicals play critical roles in the toluene degradation. The corresponding photocatalytic degradation mechanism is proposed that the excellent photocatalytic activity is attributed to providing more active sites and strong oxidation capacity for toluene.
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
JOURNAL OF FOOD SCIENCE
·
2014
·Vol. 79
·期 9
·E1695
·
IF 1.791
Yingyang Zhang,Xianchao Feng,Haizhou Wu,Jing Tang,Jianhao Zhang
en This link goes to a English section pt This link goes to a English section The thermal properties of cured meat are important for determining storage life and nutritional quality. However, few studies have focused on the thermal properties of dry-cured pork, particularly in relation to salt level and type. In order to study the thermal properties of dry-cured pork, we used differential scanning calorimetry (DSC) to evaluate the net heat energy (enthalpy, Δ H ), onset ( T onset ), and maximum ( T max ) temperatures of different pork cuts salted with mixtures of chloride (NaCl and KCl) salts within the curing and ripening temperature range. Within the curing temperature range (−5 to 20 °C), the T onset , T max , and Δ H of cured meat treated with different NaCl : KCl mixtures were generally lower than for fresh meat, which indicates that the addition of NaCl or KCl can reduce the melting of lipids and water (especially lipids), in different pork cuts. Within the ripening temperature range (5 to 50 °C), heat absorption peaks in belly and leg cuts were between 29 and 33 °C. However, no obvious heat absorption peak was found in loin cuts. Compared to non-KCl substitutions, a slightly higher KCl substitution could significantly (P < 0.05) enhance Δ H values of dry-cured belly and leg cuts. The likely cause of this phenomenon is that high KCl substitutions promote lipid oxidation ( r = 0.98, for belly; r = 0.95, for leg cuts). Therefore, KCl substitution should be no more than 30% (wt/wt), especially for high lipid pork, to prevent excessive melting and oxidation of lipids during the dry-curing process. Practial Application en This link goes to a English section pt This link goes to a English section Chloride salts (NaCl and KCl) have an important influence on the thermal properties of cured meat. Out study indicated that a high degree of KCl substitution should enhance the melting and oxidation of lipids in dry-cured pork.
研究领域:
食品科学
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营养学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2021
·
IF 6.158
Boqian Li,Shu Li,Ludong Yi,Haosheng Sun,Jun Qin,Jun Wang,Dawei Fang
Diazinon (DZN), a broad-spectrum and highly effective organophosphorus pesticide, is widely being used in agricultural production and household environments. However, massive DZN effluent can be generated during the DZN production process, which will cause devastating effects on the ecosystem and damage human health due to the improper dispose of pesticide effluent before discharging. In this work, hydrodynamic cavitation (HC), a new advanced oxidation technology, was used to degrade DZN in wastewater for the first time. The influences of DZN initial concentration (5.0–15 mg/L), solution pH (4.0–10), temperature (30–50 °C) and some orifice plate geometric parameters (orifice numbers and orifice half angles) on the degradation effect of DZN were investigated. It can be observed that the DZN in solution can be effectively degraded in orifice plate HC system based on three orifices with 45° convergent half angle and the degradation ratio can reach 50.52 % under the operation conditions of 150 min treatment time, 30 °C temperature and pH = 4.0 acidity. Subsequently, the studies of intensifying DZN degradation were also carried out through adding different inorganic oxidants such as potassium peroxodisulfate (K 2 S 2 O 8 ), potassium periodate (KIO 4 ) and sodium perchlorate (NaClO 4 ). The maximum DZN HC degradation extent (81.92 %) can be achieved in the presence of K 2 S 2 O 8 under the optimized conditions. The generated intermediate products in DZN HC degradation process are some low-toxic and low-active substances. And that, these intermediate products can be further mineralized to H 2 O, CO 2 and inorganic ions. On the basis of cavitational yield, the energy consumption analysis has been performed. Overall, this work demonstrates that the HC combined with oxidant K 2 S 2 O 8 may be a promising strategy for the large-scale treatment of organophosphorus pesticide wastewater.
研究领域:
环境科学
·
农药化学
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DOI
高影响因子
Energy & Environmental Science
·
2024
·Vol. 17
·期 14
·5147-5161
·
IF 32.4
Qingfeng Fu,Wang Zhou,Peng Gao,Hongliang Dong,Shi Chen,Changling Fan,Jilei Liu
Fluorophosphate compounds are an important class of cathode materials; however, the one-step synthesis of phase-pure fluorophosphate compounds in a well-controlled manner remains challenging owing to the facile volatilization of fluorine during heat treatment. Herein, the rapid, facile, and scalable preparation of phase-pure fluorophosphates (e.g. KVPO4F) was successfully realized via a one-step solid-state reaction through the addition of PVDF, which served as an effective fluorine-compensating, vanadium-reducing, and in situ carbon-coating agent. In-depth mechanistic study showed that carbene (:CH2) generated upon PVDF decomposition could be easily recombined to form a ˙CH2(CH2)nCH2˙ alkyl biradical, and both were able to catalyze C–F bond breakage in fluorocarbon gases (C2F4) and therefore plays a pivotal role in promoting the formation of phase-pure fluorophosphate. The resultant cathode enabled a superior potassium-storage capability, including high specific capacity, excellent rate capability, and good cycling stability. The generality of the as-proposed synthetic strategy was also validated through the successful preparation of other fluorophosphate compounds.
研究领域:
材料科学
·
电化学
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DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2025
·
IF 6
Haijing Tian,Ruo Wu,Qi Lv,Jie Shi,Xiaoqin Guo,Duo Li,Chunli Liu,Qi Li,Weijia Zheng,Haojun Fan,Xuexin Duan,Qiannan Xue
Blood potassium and creatinine levels are critical indicators for managing chronic kidney disease (CKD). In response to the need for home monitoring and emergency care, point-of-care diagnostic technologies based on microsystems have emerged, nevertheless they remain limited in portability and speed for direct in whole blood samples measurement. To enable direct blood detection of potassium and creatinine for effective CKD management, this study presents a novel on-chip self-driven dual-channel optical microsensor designed for real-time monitoring of potassium and creatinine levels in whole blood. Utilizing 3D printing technology to design and fabricate microstructures, and integrating microchannels with a filtration layer, this microsensor requires only 10 μL of blood for single-pass sample filtration and dual-parameter detection. A novel passive blood sample pumping method is proposed, utilizing internal and external pressure differentials along with internal hydrophilic properties to facilitate sample flow into the detection chambers. Light-emitting diodes (LEDs) and photodiodes, positioned on either side of the detection chamber, are employed to measure the concentrations of blood indicators. The detection results can be instantly handheld read and uploaded to the cloud via intelligent terminal, enabling seamless follow-up diagnostics and treatment. Through multiple rounds of testing on animal serum samples, whole blood samples, and real porcine blood samples, this microsensor demonstrated excellent linearity and accuracy. This innovative microsensor, designed for direct testing from a minimal volume of whole blood, holds significant potential for improving CKD management, offering a portable, reliable alternative for preoperative diagnostics and home-based chronic disease monitoring.
研究领域:
医学工程
·
生物医学
✓ 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）