Journal of Cleaner Production
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2020
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IF 7.246
Muhammad Irfan,Lei Zhou,Jia-Heng Ji,Shan Yuan,Jin-Feng Liu,Shi-Zhong Yang,Ji-Dong Gu,Bo-Zhong Mu
Biotransformation of the greenhouse gas carbon dioxide to valuable chemicals has attracted enormous attention because of its importance for sustainable environment and a potential green production strategy. This study investigated a microbial driven process for energy production from carbon dioxide by converting it to value-added chemicals using iron minerals as electron donors with an enriched microbial consortium from oil field production water as the biocatalysts . Enhanced production of the bioenergy methane and short-chain fatty acids was observed in the treatments amended with iron minerals compared to the controls without amendment. Analysis of the microbial community population revealed that Methanosarcina mazei and acetogenic bacteria especially Clostridiaceae were responsible to produce methane and volatile fatty acids, respectively. The results indicate that direct electron transfer was facilitated in the process along with hydrogen generation and chemical catalysis by minerals. The main limiting factors in the process were chemical composition, specific surface area and dissolution rate of the minerals. Formation of iron carbonate was detected indicating a potential strategy for capture and storage of carbon dioxide as carbonate minerals in reservoirs. The study yielded new insights about the potential of the earliest biochemical metabolism on earth for carbon dioxide reduction to biochemicals for microbial life, and also sustainable environmental management. It also suggests a technologically and economically feasible strategy for large-scale commercial storage of carbon dioxide in the petroleum and underground reservoirs for energy recovery and cleaner production of chemicals in an environmental efficient way.
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高影响因子
ELECTROCHIMICA ACTA
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2020
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IF 6.215
Wenqiang Yang,Qibo Zhang,Samarjeet Singh Siwal,Yixin Hua,Cunying Xu
Herein, S-doped Co-Fe hybrid films with unique 3D porous microsphere arrays stacked by ultrathin nanoflakes directly grown on nickel foam (Co-Fe-S NFs@MS/NF) are synthesized via a single-step co-electrodeposition strategy. The synergistic effects among Fe, S and Co enable superior oxygen evolution reaction (OER) catalytic activity in basic environments. Impressively, this hybrid material can achieve further enhanced OER catalytic performance with surface self-assembly through in-situ electrochemical oxidation activation in both gentle alkaline (GA: 1.0 M KOH at 298 K) and industrial alkaline (IA: 30 wt.% KOH at 353 K) water electrolysis conditions. The transition processes are revealed in detail regarding the chemical, structural, and catalytic properties of the catalysts served in the GA and IA conditions. The pristine quasi-amorphous Co-Fe-S is found to partially transform into crystallized Co(Fe)OOH in the GA condition, while it remains amorphous nature in the IA condition. The enhanced OER activity is attributed to the formation of active Co(Fe)OOH species with massively proliferated specific surface area, optimized electronic structure, and accelerated kinetics. The activated Co-Fe-S NFs@MS/NF exhibits excellent OER activity, achieving 10 and 500 mA cm −2 at ultralow potentials of 1.453 (iR corrected) and 1.517 V with outstanding durability in the GA and IA conditions, respectively. For full water splitting, the assembled two-electrode system based on the Co-Fe-S NFs@MS/NF anode and a Co-S based cathode affords voltages of only 1.518 and 1.685 V to robustly deliver 10 and 500 mA cm −2 in GA and IA conditions over 200 h, respectively.
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CHEMICAL ENGINEERING JOURNAL
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2020
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IF 10.652
Yuan Tian,Yongling An,Chuanliang Wei,Yuan Tao,Yuchan Zhang,Huiyu Jiang,Liwen Tan,Jinkui Feng,Yitai Qian
Lithium (Li) metal anode is deemed as one of the most fascinating anodes due to its high energy density . Nonetheless, low Coulombic efficiency and safety issues caused by detrimental Li dendrites growth severely hamper its practical application. Herein, we construct an ultrafine TiO 2 confined in 3D freestanding carbon paper by one-step green in-situ oxidation of Ti 3 C 2 T x MXene film with greenhouse gas CO 2 . The lithiophilic TiO 2 seeds and freestanding 3D carbon matrix can synergistically induce uniform Li deposition and buffer the volume changes during lithium striping and deposition, which ensure improved electrochemical performance with high Coulombic efficiency and low overpotential, etc . The growth process of metallic Li on C/TiO 2 is also systematically investigated. Moreover, the C/TiO 2 @Li||LiFePO 4 full batteries present a stable cycling performance over 250cycles at 1.0C and superior rate performance. Additionally, this work proposes an alternative way to utilize CO 2 , which may alleviate greenhouse effect and boost sustainable development. These results may be useful for both the design of dendrite-free lithium metal batteries and the sustainable utilizing of CO 2 .
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JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2020
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IF 2.369
Rongrong Li,Wei Wang,Xianlang Chen,Hong Chen,Huanhuan Bao,Yuwei Zhu,Jia Zhao,Deman Han
This study reports the equilibrium solubility for monobenzone in methanol, ethanol, n-propanol, isopropanol, n-butanol, acetonitrile, ethyl acetate, acetone, 1,4-dioxane, cyclohexane, N,N-dimethylformamide (DMF), N-methyl-2-pyrrolidinone (NMP), n-hexane, n-octanol, and water that was determined by means of the isothermal method between 283.15 and 313.15 K under p = 101.1 kPa. The maximum value of monobenzone solubility was 0.6316 in mole fraction at 313.15 K dissolved in ethyl acetate, but the least data was achieved in water. The solubility of monobenzone increased with the rising temperature and the order followed in the 15 pure solvents was ethyl acetate (0.6316, 313.15 K) > 1,4-dioxane (0.4350, 313.15 K) > methanol (0.1356, 313.15 K) > acetonitrile (0.1247, 313.15 K) > (ethanol, isopropanol) > n-propanol (0.09942, 313.15 K) > n-butanol (0.08346, 313.15 K) > n-octanol (0.03546, 313.15 K) > cyclohexane (8.020×10–3, 313.15 K) > n-hexane (3.133 × 10–3, 313.15 K) > NMP (2.372 × 10–4, 313.15 K) > DMF (1.145 × 10–4, 313.15 K) > acetone (4.032 × 10–5, 313.15 K) > water (3.019 × 10–5, 313.15 K). There was no existence of processes such as solvation or polymorphic transformation during the entire experiment. Several models covering the modified Apelblat, λh, Wilson, and non-random two-liquid models were applied to correlate and calculate monobenzone solubility data in fifteen monosolvents. Results showed that the modified Apelblat equation provided the best results with the experimental ones. The largest relative average deviation and root-mean-square deviation were no more than 4.74 × 10–2 and 1.81 × 10–3, respectively.
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ELECTROCHIMICA ACTA
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2020
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IF 6.215
M.W. Guo,C.B. Sun,W.Q. Yang,L. Chen,H. Lei,Q.B. Zhang
Deep eutectic solvents with the advantages of being less expensive, non-toxic, renewable, and biodegradable are emerging as versatile solvent systems for the electrochemical synthesis of advanced functional materials. Herein, we study the electrochemical deposition of Mn nanoflake arrays grown on Cu foam and the morphology evolution of Mn crystals in the early stages of nucleation and growth in a choline chloride/ethylene glycol-based deep eutectic solvent (Ethaline-based DES). Thiourea (TU) is an efficient additive that is found to promote the electrochemical reduction of Mn(II) species in Ethaline-based DES and induce the formation of Mn nanoflake architectures with a nanoporous configuration. Investigation of the nucleation and growth processes with chronoamperometric transients reveals that the presence of TU can accelerate the generation of homogeneous Mn nuclei and dramatically enhanced the nucleation rate by modifying the corresponding nucleation and growth model from 3D progressive to 3D instantaneous. TU is found to play an important role in the crystallization kinetics of Mn crystals and manipulate the shapes, sizes, and growth morphologies of the formed Mn films. Our work highlights the importance of additives for controlling the microtopography of nanostructured Mn in Ethaline-based DES for potential electrochemical applications.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2020
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IF 4.65
Xiaolei Wu,Hanqing Zhao,Junmin Xu,Ye Wang,Shuge Dai,Tingting Xu,Shengman Liu,Sen Zhang,Xinchang Wang,Xinjian Li
Marcasite FeS 2 hollow microspheres were selectively synthesized by a simple hydrothermal method . Time-dependent evolution reveal that marcasite FeS 2 hollow microspheres is formed attributed to the phase transformation from greigite Fe 3 S 4 into marcasite FeS 2 with Ostwald ripening mechanism. The hollow marcasite FeS 2 exhibits excellent electrochemical performance as the anode of sodium ion batteries (SIBs). Significantly, the FeS 2 (M) hollow microspheres deliver a high specific discharge capacity of 363 mA h g −1 at 100 mA g −1 after 300 cycles. They also still deliver high-rate and long-life performance with a specific discharge capacity of 280 mA h g −1 at a high current density of 1000 mA g −1 after 1000 cycles. Moreover, the high rate capability and long cycling stability of the FeS 2 (M) hollow microsphere electrodes are investigated by the in-depth kinetics analysis. Our results demonstrate the marcasite FeS 2 hollow microspheres would be a promising anode material for SIBs.
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INORGANIC CHEMISTRY COMMUNICATIONS
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2020
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IF 1.943
Shi-wen Wang,Ming Mao,Yang Cao,He-wei Luo,Heng Wang,Dong-jie Guo
Using NiCl 2 ·6H 2 O, CoCl 2 ·6H 2 O, Na 2 HPO 4 , manganese dioxide (MnO 2 ) and Multi-walled carbon nanotubes (MWCNTs) as the main raw materials, the cuboid-like cobalt nickel phosphate/MnO 2 /MWCNTs (CNPMM) composites were successfully prepared by a simple hydrothermal method. The morphology, composition and structure of the composites were studied by scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), transmission electron microscopy (TEM), X-ray diffraction (XRD), Raman spectrum, specific surface area analyzer and particle size analysis. SEM images showed that the composite material presented a cuboid-like morphology. The width, length and height of cuboids are 0.3–0.8 µm, 2–3 µm and 8–10 µm, respectively. The special structure and morphology of the sample provide more active sites, making it exhibit superior pseudocapacitance. The electrochemical performance of the three-electrode system supercapacitor was systematically studied by cyclic voltammetry, constant current charge-discharge and electrochemical impedance spectroscopy. When the mass ratio of MnO 2 to MWCNTs is 1:1 with the total doping amount of 3.9 wt%, the as-prepared CNPMM 1:1 composite shows the best capacitance performance. With 3 mol·L −1 KOH as the electrolyte, it exhibits a specific capacitance as high as 2334 F g −1 at the current density of 1 A g −1 . Even at the high current density of 10 A g −1 , the specific capacitance can still be maintained at 1672 F g −1 , and the corresponding specific capacitance retention of 71.6%, indicating that the composite electrode material has good rate performance. The results show that the cuboid-like CNPMM 1:1 composite is a promising electrode material for supercapacitors.
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NANOTECHNOLOGY
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2020
·Vol. 31
·期 16
·165503
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IF 3.551
Hang Song,Jie Liu,Haiyang Lu,Chao Chen,Long Ba
A gas sensor made from graphene vertical field effect transistor (VGr-FET) has been fabricated using graphene as the source electrode, C60 thin film as the semiconductor layer and aluminum thin film as the drain electrode. The on/off ratio of transistor gated by bottom electrode with ionic liquid gel as dielectric layer is derived to be 103 from measured source–drain current Ids. The apparent energy barrier height between the graphene and polycrystalline fullerene was calculated from the model of heterojunction diode I–V response curves. The barrier height φBH was altered by the gating potential vertically applied on graphene sheet, resulting the large on/off ratio of the transistor. The effect of surface adsorption of water vapor, oxygen, ammonia and isoprene gas phase molecules on the Ids was measured. The lower limit of detection (LOD) for ammonia (86 ppb) than that of isoprene (420 ppb) is attributed to the donor nature of ammonia contact with p-type graphene, and the adsorbed donor leads to a corresponding positive gating effect to the VGr-FET. This facile, low cost and quick responsive device shows promise for early diagnose of severe human respiratory diseases.
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高影响因子
FUEL
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2020
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IF 5.578
Liguang Dou,Mingkai Fu,Yuan Gao,Lei Wang,Cunji Yan,Tianzeng Ma,Qiangqiang Zhang,Xin Li
Direct hydrogenation of CO 2 to synthetic natural gas at a lower temperature remains a big challenge especially in the presence of H 2 S impurity. This contribution describes the synthesis, structure, morphology and doping effect of a series of robust catalysts for CO 2 methanation under resistive heating, based on Ni-layered double hydroxides (LDH) grown on porous and electrically conductive nickel foam (NF) derived structured catalysts. As a result, LaNi/NF showed the highest CO 2 conversion (55%) and CH 4 formation rate (631.5 mmol·g −1 ·h −1 ) at lower temperature of 250 °C and FeNi/NF gave the optimal conversion at 350 °C (75%, 860.9 mmol·g −1 ·h −1 ), which was superior to the most of recently reported Ni-based supported catalysts. We found that the CH 4 selectivity of the H 2 S (50 ppm) poisoned catalysts was significantly decreased and CO was verified as the main by-product. In this case, LaNi/NF and FeNi/NF still retained much higher conversion rate at 300 °C, 29.8% for LaNi/NF and 27% for FeNi/NF, than the almost deactivated unmodified Ni/NF with maximum 5% CO 2 conversion. The extraordinary activities can be explained as that the dopants can greatly strengthen the metal-support interaction and further enhance the reducibility of active metallic Ni, as XRD, HRTEM, TPR and XPS indicated. Besides of this, DFT calculations demonstrated that the existence of La can greatly promote CO 2 adsorption by lowering the adsorption barrier from 0.55 eV of pure Ni to 0.12 eV, and further inhibit the gaseous H 2 S from chemisorbing on the catalyst surface owning to the relatively unstable Ni-S bond.
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WOOD SCIENCE AND TECHNOLOGY
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2020
·Vol. 54
·期 5
·1223-1239
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IF 2.109
Wang Zhangheng,Zou Weihua,Sun Delin,Ji Xiaoqin,Yu Minggong
To improve the hydrophobicity of wood, utilizing a silica/wax composite emulsion (PPW@SiO 2 ), which was prepared by maleic anhydride-grafted polypropylene wax (PPW) and nanosilica, served as a hydrophobic agent. The hydrophobicity modifying process of fast-growing poplar was carried out by heating permeation and hot pressing to prepare in-depth hydrophobic wood. The results show that the hydrophobic agent can fill the pores of poplar partly and form a two-dimensional, “petal-like”, rough hydrophobic structure in the pores. The water contact angle (WCA) on the surface of modified poplar can reach 140.3° when the amount of SiO 2 is 1%. Even after surface grinding of 3 mm, the WCA is still higher than 130°, indicating the hydrophobic wood has a good performance of in-depth hydrophobicity. Furthermore, the surface of hydrophobic wood presents an exceptional self-cleaning function, and the physical and mechanical properties are also improved. Compared with a reference sample, the density, surface hardness, modulus of elasticity, compressive strength, and modulus of rupture of hydrophobic wood are increased by 66.67%, 53.16%, 55.60%, 49.50%, and 40.87%, respectively, and the water absorption in hydrophobic wood is also significantly decreased.
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ACS Sustainable Chemistry & Engineering
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2020
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IF 7.632
Guochao Yang,Jingrui Cai,Yaru Geng,Bingbing Xu,Qiuhui Zhang
After the flame-retardant treatment, a pulp fiber has the problems of high smoke production and high smoke toxicity. To solve the above problems, a ZSM zeolite after copper modification was added to the ammonium polyphosphate (APP) flame-retardant pulp, and the effects of the modified ZSM zeolite on flame retardance, smoke suppression, and toxicity reduction were investigated. The content of Cu in the ZSM zeolite modified by ion exchange and calcination (500Cu-Z) was 1.73%, and its existing forms were free Cu2+, combined Cu2+, and Cu+. After modification, the strength of the weak and medium strong acids in the zeolite decreased, and the total acid content decreased by 10.90%. However, in the high-temperature range, a new strong acid site appeared. Compared with the APP-treated pulp fiber, the addition of 500Cu-Z could reduce the carbonization length, and the amount of smoke released decreased by 63.28% at the same time. The analysis of the gas composition indicates that the 500Cu-Z zeolite can reduce the relative concentration of CO to decrease the toxicity of smoke in the combustion process. A stronger flame-retardant layer was formed on the surface of the pulp fiber after adding zeolite and APP. There were chemical bonds such as P═O, C═C, C–O, Si–O–Si on the surface of the flame-retardant layer of 500Cu-Z/A/Pulp2.0. The 500Cu-Z zeolite had a synergistic flame-retardant effect with APP on the pulp fiber. After combustion, it was shown that a phosphoric acid layer existed on the surface of the fiber. The addition of zeolites can form a mosaic mechanism between the zeolite and the phosphoric acid layer to strengthen the flame-retardant layer. To conclude, the flame-retardant layer may reduce the generation of smoke and 500Cu-Z zeolites in layer catalytic CO to CO2 in smoke to reduce toxicity.
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MICROCHIMICA ACTA
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2020
·Vol. 187
·期 6
·1-8
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IF 6.232
Liang Pei,Cao Yu,Dong Qianmin,Wang Dan,Zhang De,Jin Shangzhong,Yu Zhi,Ye Jiaming,Zou Mingqiang
Simple and traditional hydrothermal fabrication of a novel balsam pear-shaped CuO with high SERS enhancement is presented. XRD (X-ray diffraction), SEM (scanning electronic microscopy), TEM (transmission electron microscope), HRTEM (high-resolution transmission electron microscope), UV-Vis, and Raman are adopted to ensure that this balsam pear-shaped CuO with dense nanoparticle protuberance is successfully prepared. The LOD of this CuO SERS substrate is 4.79 μg L −1 with R6G as molecular probe. By using DFT (density functional theory) calculation and FDTD (finite difference time domainmethod) simulation, both EM (electromagnetic enhancement) and CM (chemical enhancement) mechanisms are investigated, and the results show that these two-enhancement mechanisms can coexist in this balsam pear-shaped CuO. Finally, the prepared substrate has been applied for the determination of trace levels of paraquat in solution , and results show that its LOD for paraquat is 275 μg L −1 (optimum Raman band: 1646 cm −1 Raman shift), which is better than the government standard in China. A dexterous and facile way for fabrication of CuO SERS-active substrates with low cost and high performance, quite promising in detection of chemically hazardous substances and pesticide residue is provided.
Graphical abstract
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高影响因子
危险品化学品经营许可证（带存储）