Nanomaterials
·
2019
·Vol. 9
·期 8
·1135
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IF 4.034
Yinglin Zhang,Yulin Shi,Bo Yan,Tingting Wei,Yin Lv,Long Chen,Feng Yu,Xuhong Guo
The rational treatment of hazardous textile sludge is critical and challenging for the environment and a sustainable future. Here, a water-soluble chitosan derivative was synthesized and used as an effective flocculant in removal of reactive dye from aqueous solution. Employing these chitosan-containing textile sludges as precursors, graphene-like carbon nanosheets were synthesized through simple one-step carbonization with the use of Fe (III) salt as graphitization catalyst. It was found that the resultant graphene-like carbon nanosheets material at thickness near 3.2 nm (NSC-Fe-2) showed a high graphitization degree, high specific surface area, and excellent bifunctional electrochemical performance. As-prepared NSC-Fe-2 catalyst exhibited excellent oxygen reduction reaction (ORR) activity (onset potential 1.05 V) and a much better methanol tolerance than that of commercial Pt/C (onset potential 0.98 V) in an alkaline medium. Additionally, as electrode materials for supercapacitors, NSC-Fe-2 also displayed an outstanding specific capacitance of 195 F g−1at 1 A g−1and superior cycling stability (loss of 3.4% after 2500 cycles). The good electrochemical properties of the as-prepared NSC-Fe materials could be attributed to the ultrathin graphene-like nanosheets structure and synergistic effects from codoping of iron and nitrogen. This work develops a simple but effective strategy for direct conversion of textile sewage sludge to value-added graphene-like carbon, which is considered as a promising alternative to fulfill the requirements of environment and energy.Keywords:chitosan;textile sludge;graphene-like carbon nanosheets;oxygen reduction reaction;supercapacitor
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CHEMICAL ENGINEERING JOURNAL
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2020
·
IF 10.652
Yanpei Li,Xiangwei Wu,Jingyi Wang,Xingpeng Gao,Yingying Hu,Zhaoyin Wen
The sodium-nickel chloride (Na-NiCl 2 ) batteries technology has been considered as one of the most promising candidates for large-scale electrical energy storage application owing to its abundant electrode material resource, high energy density and safety. However, ultra-excessive Ni in the cathode leads to high material cost and the growth of cathode particles during cycles makes degradation of batteries performances, which hinder the further application of Na-NiCl 2 batteries. To address these challenges, we designed a free-standing Ni-less cathode with Ni/NaCl particles uniformly distributed in the three-dimensional (3D) conductive matrix constructed by carbonfiber (CF) and multiwalled carbon nanotubes (MWCNTs). The 3D hierarchical structure synthesized by low-cost vacuum filtration method can offer sufficient void space to accommodate the growth of NaCl particles and effectively enhance the electronic conductivity of the cathode. When the molar ratio of Ni/NaCl in the cathode is reduced to 1.0, a specific capacity of 90 mAh g −1 for planar Na-NiCl 2 batteries can be achieved after 170 cycles at 190 °C with a capacity retention of 67%, which is higher than that of traditional tubular Na-NiCl 2 batteries.
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CHEMICAL RESEARCH IN TOXICOLOGY
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2019
·
IF 3.274
Xiucai Guo,Wei Li,Qingmei Li,Yan Chen,Guode Zhao,Ying Peng,Jiang Zheng
Tofacitinib (TFT) is an oral JAK inhibitor which has been approved for the treatment of moderately and severely active rheumatoid arthritis. TFT was found to show concentration-, time-, and NADPH-dependent inhibition of CYP3A4, and irreversibility of the inactivation was also observed. Incubation (40 min, 37 °C) of recombinant CYP3A4 with TFT at 200 μM resulted in >70% loss of CYP3A4 activity. Estimated kinact and KI were 0.037 min–1 and 93.2 μM, respectively. GSH and superoxide dismutase/catalase revealed minor or little protection against the CYP3A4 inactivation. Furthermore, ketoconazole attenuated TFT-mediated CYP3A4 inactivation. Epoxide and α-keto-aldehyde intermediates of TFT were trapped and characterized in microsomal incubations, respectively. The aldehyde intermediate is believed to be the key for the enzyme inactivation. Multiple P450 enzymes, including CYPs2C19, 3A4, 2D6, and 1A2, participated in the metabolism of TFT to the epoxide, while the formation of the aldehyde was mainly catalyzed by CYP3A4. In conclusion, TFT was proven to be a mechanism-based inactivator of CYP3A4.
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Journal of Materials Chemistry A
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2019
·Vol. 7
·期 37
·21386-21403
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IF 10.733
Xin Song,Jiangle An,Chao He,Jukai Zhou,Yuanting Xu,Haifeng Ji,Li Yang,Jiarui Yin,Weifeng Zhao,Changsheng Zhao
Super adsorbents with ultrahigh adsorption capabilities are highly desired for efficient wastewater remediation. However, most of the adsorbents with high adsorption capabilities are powdery adsorbents, showing inescapable limitations in practical adsorption column application. It is practically urgent to develop a simple and effective method for preparing adsorbents with ultrahigh adsorption capability and convenient column operation ability. Herein, inspired by oviparity, we fabricate super-adsorbent hydrogel spheres (SAHSs) based on self-sacrificing micro-reactors, which achieve the interior cross-linking polymerization of the hydrogel network and subsequent self-disintegration within only 150 seconds. The as-prepared poly(2-acrylamido-2-methyl-propanesulfonic acid-co-acrylic acid) hydrogel spheres show outstanding adsorption capabilities toward organic dyes (4625 ± 231 mg g−1 for methylene blue) and heavy metallic ions (4312 ± 185 mg g−1 for Pb(II)). Remarkably, the adsorption column packed with the SAHSs exhibits splendid removal abilities for organic dyes, which can purify 6280 mL of dye-containing wastewater (150 μmol L−1) thoroughly using only 7 mL SAHSs. This is the first time that a maximum dynamic removal capacity over 50 g L−1 spheres has been obtained using an adsorption column. In addition, the hydrogel spheres also show good recyclability, dynamic filtration–regeneration, selective adsorption and smart separation–regeneration. Thus, the oviparity-inspired method to fabricate super-adsorbent hydrogel spheres has great potential to be used in efficient, economical and environmental wastewater treatment.
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ENZYME AND MICROBIAL TECHNOLOGY
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2018
·
IF 2.932
Juan Han,Yunfeng Cai,Yun Wang,Lei Gu,Chunmei Li,Yanli Mao,Wenli Zhang,Liang Ni
In this work, a novel Ni 2+ &AABOB bifunctional core–shell magnetic composite nanoparticles (MNPs), Fe 3 O 4 @p(AABOB-co-AIM-Ni 2+ ), were synthesized for the immobilization of horseradish peroxidase (HRP). Two kinds of interaction are simultaneously incorporated to improve the stability and reusability of immobilized HRP: one is the coordination between Ni 2+ and amide group in HRP, and the other is the interaction of the wulff-type boronic acid group with cis-diol-containing HRP which belongs to a type of glycoproteins. Accordingly, the proposed approach achieved high enrichment capacity (174.75 mg/g, protein/beads), and the activity of immobilized HRP still achieved 80% after reuse for 5 cycles. The degradation efficiency of phenol in the presence of immobilized HRP reached 93% within 10 min, which was significantly higher than that of free HRP only about 50% within 20 min. In addition, the immobilized HRP can be easily separated from the reaction solution by an external magnetic field.
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Advanced Materials Interfaces
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2018
·Vol. 5
·期 20
·1800571
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IF 4.834
Hao Chang,Rui Guo,Ziqiao Sun,Hongzhang Wang,Yi Hou,Qian Wang,Wei Rao,Jing Liu
Liquid metals such as gallium and its alloys can be printed on various substrates to form electronic circuits. However, up to now there are still few methods for the direct writing of liquid metals on common printed paper. Here, a novel conductive material prepared by adding metal powder to a gallium alloy is introduced. The proposed material exhibits low liquidity, excellent plasticity, significantly enhanced adhesivity to paper substrates, which guarantee the stable and flexible electrical connection. The oxide film wrapping the nickel powder forms a skeleton for additional oxidation products, resulting in superior adhesion to paper. In addition, several paper flexible electronic applications are showcased to demonstrate the practical value and reparability of this material. This work paves the way for the design of a facile method of preparing paper electronics.
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ENERGY & FUELS
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2018
·
IF 3.024
Da Wang,Yuyang Wang,Xiaoyu Li,Lei Chen,Guangci Li,Xuebing Li
In situ catalytic hydrogenolysis of lignin is an efficient method for lignin valorization. Herein, a novel in situ lignin catalytic hydrogenolysis technique in alkaline aqueous solution over a NiAl alloy catalyst under mild conditions was systematically suited. Ni served as the active phase and could be exposed by etching Al atoms with alkaline aqueous solution. Meanwhile, H2 resources could be in situ generated and easily arrived at the adjacent exposed Ni sites to be activated. The in situ lignin hydrogenolysis system exhibits attractive depolymerization results under mild conditions, with an 86.8% conversion degree and 18.9 wt % yield of aromatic monomers at 220 °C, much higher than the traditional hydrogenolysis method using a commercial Raney Ni catalyst under high pressure external H2. The mechanism studies with lignin model compounds suggest that alkaline aqueous solution could promote the cleavage of C–O–C bonds and hinder the hydrogenation of the benzene ring. In addition, a moderate amount of exposed Ni sites as well as rich active hydrogen species are determinant for efficient lignin depolymerization.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2018
·
IF 3.141
Fukun Li,Zhangmin Li,Liam John France,Jiali Mu,Changhua Song,Yuan Chen,Lilong Jiang,Jinxing Long,Xuehui Li
Novel and selective strategies for platform chemical production from renewable biomass are highly attractive in respect to value-added utilization of sustainable resources. In this study, a series of low-cost, commercially available, transition metal carbonates (Zr, Ni, Mg, Zn, and Pb) were investigated for catalytic transfer hydrogenation of levulinate esters to γ-valerolactone (GVL) via the cascade process of Meerwein–Ponndorf–-Verley (MPV) reduction and lactonization reaction. Among the selected catalysts, basic zirconium carbonate is the most active, with the highest turnover frequency (TOF) of 3.1 h–1 and a surface reaction rate of 0.21 mol m–2 h–1. At 453 K, 3.0 h, and 1.0 MPa N2, 100% ethyl levulinate conversion, 96.3% GVL yield, and 91.9% hydrogen donor utilization are observed due to the cooperative effect between acid (Mn+) and base (−OH) sites. Furthermore, this catalyst shows high recyclability under the optimized conditions, where a satisfactory catalytic activity is shown even after six consecutive runs.
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JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
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2018
·
IF 3.046
Xiaoshan Yang,Xiufang Cui,Guo Jin,Jinna Liu,Yanbo Chen,Zhe Liu
Laser additive manufacturing (LAM) is a novel method for processing compositionally graded alloys and becomes increasingly important in the context of next-generation manufacturing technology. In this work, (Fe 60 Co 35 Ni 5 ) 78 Si 6 B 12 Cu 1 Mo 3 soft magnetic alloys with different laser power were designed and processed by the LAM. The magnitudes of magnetic properties were analyzed, and the relationships among composition-microstructure-magnetic properties assessed. Results show that the (Fe 60 Co 35 Ni 5 ) 78 Si 6 B 12 Cu 1 Mo 3 alloys by LAM exhibits relative uniform microstructure and comparable magnetic property compared with those conventional processed alloys. The bcc dominated microstructures exhibit a substantially higher saturation magnetization (Ms). With the increase in power, the average grain size of the alloy increased slightly and the increasing volume fraction of the Fe Si phase leaded to the enhancement of magnetization. The (Fe 60 Co 35 Ni 5 ) 78 Si 6 B 12 Cu 1 Mo 3 alloys with laser power of 3000 W exhibits the highest Ms (199 emu/g). The appearance of Fe 3 B results in coarse dendrites and high coercivity (Hc) in the multiple re-heating cycles.
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JOURNAL OF ELECTRONIC MATERIALS
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2018
·Vol. 48
·期 4
·1840-1845
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IF 1.566
Sun Fu-Hua,Dong Jinfeng,Tang Huaichao,Zhuang
Hua-Lu,Li Jing-Feng
Cu 12 Sb 4 S 13 tetrahedrite is an abundant natural that is also environmentally friendly. There have been efforts made to reach a unity of ZT value through optimizing the interdependence of electrical and thermal performance. In this study, we reported on ZnO nanoparticles-dispersed Cu 11.5 Ni 0.5 Sb 4 S 13− δ composites that were synthesized by the mechanical alloying and spark plasma sintering method. The structural characterizations were conducted via scanning electron microscopy, electronic probe microscopic analysis and transmission electron microscopy. The ZnO-nanoparticles were uniformly distributed in the Cu 12 Sb 4 S 13 grains. ZnO was used as a heterogeneous nucleation site to reveal the effectiveness of reducing thermal conductivity, likely derived from the strong low/mid-frequency phonon scattering. The lowest lattice thermal conductivity, 0.33 W m −1 K −1 , was obtained at 673 K in 0.5 vol.% of ZnO sample. A small quantity of ZnO addition led to a high ZT ∼ 1.0 at 723 K, which increased by ∼ 42% in the pure-phased Cu 12 Sb 4 S 13− δ sample.
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Nature Energy
·
2018
·Vol. 3
·期 12
·1067-1075
·
IF 46.859
Gao Wenbo,Guo Jianping,Wang Peikun,Wang Qianru,Chang Fei,Pei Qijun,Zhang Weijin,Liu Lin,Chen Ping
Ammonia is a promising carbon-free energy carrier, but is currently synthesized industrially under harsh conditions. Synthesizing ammonia using lower temperatures and pressures could therefore improve its prospects as a chemical means to store and transport energy. Here we report that alkali and alkaline earth metal imides function as nitrogen carriers that mediate ammonia production via a two-step chemical looping process operating under mild conditions. Nitrogen is first fixed through the reduction of N 2 by alkali or alkaline earth metal hydrides to form imides and, subsequently, the imides are hydrogenated to produce NH 3 and regenerate the metal hydrides. The oxidation state of hydrogen therefore switches between −1 (hydride), 0 (H 2 ) and +1 (imide and NH 3 ). Late 3d metals accelerate the reaction rates of both steps. The chemical loop mediated by BaNH and catalysed by Ni produces NH 3 at 100 °C and atmospheric pressure.
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Journal of Materials Chemistry A
·
2018
·Vol. 6
·期 25
·12098-12105
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IF 9.931
Qiang Zhang,Gang Peng,Jean Pierre Mwizerwa,Hongli Wan,Liangting Cai,Xiaoxiong Xu,Xiayin Yao
All-solid-state lithium batteries using nonflammable inorganic solid electrolytes can completely eliminate the safety issues, such as leakage and combustion. Moreover, energy densities can be improved significantly using transition metal sulfide electrodes and metallic lithium in all-solid-state lithium batteries owing to their high theoretical specific capacity and excellent interfacial compatibility with sulfide solid electrolytes. In this work, nickel sulfide anchored carbon nanotube (NiS–CNT) nanocomposites were successfully synthesized by a facile hydrothermal method. The very small NiS particle size with a distribution of 5–10 nm as well as the presence of multi-walled carbon nanotubes not only enhance the ionic/electronic conduction but also alleviate the volume changes, which endow the NiS–CNT based all-solid-state lithium batteries with superior rate capability and excellent cycling performances. Typically, Li/75% Li2S–24% P2S5–1% P2O5/Li10GeP2S12/NiS–CNT all-solid-state lithium batteries delivered a high reversible capacity of 515 mA h g−1 after 30 cycles at a current density of 0.1 A g−1. Even after increasing the current density to 1.0 A g−1, the all-solid-state lithium batteries still maintain a stable discharge capacity of 170 mA h g−1 after 150 cycles. Moreover, the conversion reaction mechanism of the NiS–CNT nanocomposites in all-solid-state lithium batteries was investigated by ex situ XRD measurements.
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