JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Jiawei Lin,Muzi Li,Yisha Wang,Yafang Li,Fan Sun,Xin Chen,Zhongnan Guo,Jing Zhao,Wenxia Yuan
Exploring semiconductors with a large band gap and a small hole effective mass are of great importance for the development of outstanding p-type transparent conducting materials. In this work, we report the single crystal growth of two Zn-based chalcogenides K 2 Zn 3 S 4 and Rb 2 Zn 3 Se 4 . Single crystal X-ray diffraction revealed that K 2 Zn 3 S 4 and Rb 2 Zn 3 Se 4 crystallize in P 2/ c and Ibam space group, respectively. Both compounds show layered structure, and the layers are formed by edge-sharing tetragonal [Zn 3 Q 4 ] 2- units and alkali-metal cations are distributed between the layers. To our surprise, compared to the previously reported structure obtained by powder X-ray diffraction, K 2 Zn 3 S 4 crystallized in a new type of structure in which adjacent layers were displaced. Both experiments and theoretical calculations indicate that K 2 Zn 3 S 4 and Rb 2 Zn 3 Se 4 are direct semiconductors with large band gaps, and the experimental values are 3.6 eV for K 2 Zn 3 S 4 and 3.1 eV for Rb 2 Zn 3 Se 4 . Based on first-principles calculations, the hole effective masses of K 2 Zn 3 S 4 are calculated to be as small as 0.425 me, revealing the potential remarkable transparent conductivity in this Zn-based chalcogenide.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2022
·Vol. 10
·期 46
·24708-24716
·
IF 14.511
Chaowei Li,Wenhui Wang,Xiaojuan Sun,Haili Hou,Chen Zheng,Jinagchao Zhang,Fengjun Hou,Daojun Zhang,Jimin Du,Yagang Yao
Silver–zinc (Ag–Zn) batteries are regarded as a promising power source for flexible and wearable electronics due to their high safety, high energy density, and steady output voltage. However, the weak flexibility and poor cycle performance significantly limit the practical use of Ag–Zn batteries. In this work, we propose a novel flexible fibrous quasi-solid-state mild Ag–Zn battery with superb cycling performance by using a mild electrolyte and highly flexible binder-free electrodes. Carbon nanotube fibers serve as the current collector to improve the flexibility of flexible Ag–Zn cells. The mild electrolyte containing ZnCl2 and Na2SO4 not only prevents the dissolution of the Ag cathode but also impedes the heterogeneous growth of Zn dendrites. With 1500 cycles at 1 A g−1, the fibrous quasi-solid-state mild Ag–Zn battery achieves a remarkable capacity retention of 93.1%. Moreover, this novel flexible quasi-solid-state mild Ag–Zn battery can deliver a high capacity of 103.51 mA h g−1 at 0.1 A g−1. The fibrous quasi-solid-state mild Ag–Zn battery demonstrates remarkable flexibility and excellent bending ability (after 600 bending cycles with capacity retention of 89%). This pioneering work sheds light on the establishment of high-performance quasi-solid-state mild Ag–Zn batteries for burgeoning wearable electronics.
✓ 已验证
产品关联
DOI
高影响因子
FUEL PROCESSING TECHNOLOGY
·
2022
·
IF 8.129
Yiwei Tang,Junyan Fu,Yicong Wang,Haixin Guo,Xinhua Qi
Hydrogenation of levulinic acid to γ-valerolactone is one of the important reactions for conversion of biomass into renewable fuels and chemicals. Ni-Zn non-noble bimetallic catalysts supported on ordered mesoporous carbon (Ni-Zn@OMC) were prepared by one-pot solvent evaporation induced self-assembly (EISA) method and used for hydrogenation of levulinic acid to γ-valerolactone (GVL) in water. A GVL yield of 93% was obtained over bimetallic Ni 1 -Zn 1 @OMC catalyst at 180 °C in 90 min reaction time, with a turnover frequency (TOF) of 686.4 h −1 . Compared with Ni@OMC, the incorporation of Zn metal leads to the formation of Ni-Zn alloy and high dispersion of Ni particle on the catalyst surface . NiO sites on the catalysts lowered competitive adsorption between H 2 and levulinic acid on Ni 0 sites, as well as the Ni-Zn alloy is beneficial to the activation of carbonyl group in levulinic acid, and they synergistically promote the hydrogenation of levulinic acid to 4-hydroxyvaleric acid (4-HVA). Zn content in the catalyst influences both the activity of Lewis acid sites and the ratio of Lewis acid to Brønsted acid sites, and the active sites of Ni δ– Zn δ+ can facilitates the weakening and cleavage of C-O in 4-HVA, both of them are beneficial to the dehydration of 4-HVA to GVL.
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Lianjie Huang,Hao Huang,Wei Guo,Shuang Wang
Ternary transition metal oxides are attractive candidates for supercapacitor electrodes owing to the potential synergistic effects of multi metal species. However, their actual electrochemical performance is not satisfactory due to unsatisfied microstructures, morphologies or components. It is well known that electrode materials with appropriate morphology have a great influence on their electrochemical performance. In this work, a new urchin-like zinc-nickel-cobalt oxide (ZNCO) microsphere with a spinel cubic structure is prepared by simple hydrothermal method. Such an interesting structure is expected to offer larger surface areas, and the multi metal species can enhance the electrical conductivity, introduce extrinsic defects and improve its electrochemical performance. As expected, the specific capacity and rate performance of prepared ZNCO are 766 C/g at 1 A/g and 93.21% of capacity retention at 20 A/g, respectively. The study of charge storage mechanism of ZNCO shows that it includes both diffusion and capacitive-controlled processes. Moreover, the assembled device shows a high specific energy of 41.4 Wh/kg at a specific power of 850 W/kg and the cycling stability is nearly 90% after 20000 charge/discharge cycles. Impressively, the specific energy remains 21.6 Wh/kg at the specific power of 12.75 kW/kg. Therefore, the urchin-like ZNCO microsphere prepared in this work has a good prospect for supercapacitors electrode and this work provides guidance on designing ternary transition metal oxides for energy conversion and storage.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Tuo Xin,Rongkun Zhou,Qiuju Xu,Xiangcheng Yuan,Zilong Zheng,Yiqing Li,Qi Zhang,Jinzhang Liu
Aqueous rechargeable Zn-ion batteries (ZIBs) have been regarded as a complement to LIBs due to their merits in terms of high safety, low cost, environmentally benignity, and long cycle life. However, the Zn metal anode suffers from corrosion and parasitic reactions in the aqueous electrolyte, which lead to growth of byproduct flakes and hydrogen gas evolution in the Zn platting/stripping process. Here, an organic additive, 15-crown-5 ether (15-CE-5), is added into the aqueous ZnSO 4 electrolyte to improve the Zn anode performance by altering the Zn 2+ solvation sheath. Other CE molecules such as 12-CE-4 and 18-CE-6 are also tested, while their efficacies are inferior compared to that of 15-CE-5. The optimal concentration of 15-CE-5 in the ZnSO 4 electrolyte is found to be 2 wt%, which enables the best performance of Zn anode in either Zn||Zn symmetric cells or MnO 2 ||Zn full cells. Using this modified electrolyte, the Zn||Zn symmetric cell exhibits a cycle life of 770 h when tested at 2 mA cm −2 and a set capacity of 2 mAh cm −2 , and the MnO 2 ||Zn full cell shows enhanced and stable capacity over 1000 cycles. The experimental results are elucidated by theoretical studies including molecule dynamics simulations and density functional theory calculations.
✓ 已验证
产品关联
DOI
高影响因子
Energy Technology
·
2022
·Vol. 10
·期 11
·2200602
·
IF 4.149
Xiaoran Zhu,Jianze Zhang,Yan Wang,Mingsheng Yang,Haiping Yu,Tengfei Li,Mingjun Hu,Jun Yang
It remains a challenge to achieve high-performance, low-cost, and robustly durable Fe, N co-doped carbon-based oxygen reduction reaction (ORR) catalysts with abundantly accessible Fe–N X sites. Herein, a novel scheme is designed to enrich the pore structure, increase the specific surface area, and generate spatially isolated Fe–N X sites of the ORR catalyst, in which pyridine nitrogen-rich lamellar metal–organic complex (Fe–tetrapyridophenazine) is employed as the precursor and 2D graphitic carbon nitride (g-C 3 N 4 ) as additional nitrogen source for achieving synergistic nitrogen-doping effect. The introduction of g-C 3 N 4 not only ameliorates the nitrogen coordination environment of metal active centers of the composite, but also increases the specific surface area and improves the pore structure. The resultant Fe–NC&CN composite has abundant active sites as well as remarkable electrical conductivity and suitable pore size for electron transfer and reactant diffusion. As expected, the catalyst exhibits excellent ORR activity, driving the reaction with low overpotential ( E 1/2 = 0.879 V) and remaining stable over a long reaction time (93% for 60 000 s), better than commercial Pt/C (20%) in all aspects. The assembled Zn–air battery exhibits high open-circuit voltage of 1.566 V and high specific capacity of 815 mAh g Zn −1 , as well as stable and persistent discharge performance.
✓ 已验证
产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2022
·Vol. 189
·期 9
·1-10
·
IF 6.408
Zhou Xuemei,Qi Yuji,Tang Yulian,Gao Hui,Lv Li,Lei Xingyu,Hu Lei,Yan Zhengquan
To enhance the peroxidase-like performance and its application in detection of toxic o -aminophenol ( o -AP), a kind of bimetal Cu–Zn oxide-based mesoporous nanosphere (Cu 2/3 Zn 1/3 O PNPs) was constructed under microwave-radiation conditions. Its mesoporous microstructure and peroxidase-like catalytic activity were investigated in detail. The results showed that Cu 2/3 Zn 1/3 O PNPs possessed a high specific surface area of 34.89 m 2 g −1 and a well-distributed mesoporous size of approximate 6.07 nm, which endowed the superior peroxidase-like performance. The material catalyzes the oxidization of 3,3′,5,5′-tetramethylbenzidine (TMB) with K m / V max of 0.104 mM/3.79 × 10 −8 M·s −1 in the presence of H 2 O 2 . Especially o -AP could exclusively deteriorate the characteristic UV–Vis absorbance intensity at 653 nm ( A 653 ) of the Cu 2/3 Zn 1/3 O PNPs-TMB-H 2 O 2 system with obvious color change from blue to colorless. Under the optimal conditions, the effect of some interfering substances was low and the limit of detection (LOD) for o -AP was 1.65 × 10 −8 mol/L (S/N = 3). When applied to the colorimetric detection of o -AP in practice, the recovery was between 96.1 and 107.2% with R.S.D. less than 2.04%. The mechanism of synergic-enhancement peroxidase-mimic activity of Cu 2/3 Zn 1/3 O PNPs and its exclusive colorimetric response to o -AP were proposed as well. Graphical abstract
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 37
·17767-17775
·
IF 3.925
Ji-Ping Jia,Yu-Lu Zhang,Jin-Yu Gou,Yi-Xuan Zhang,Yu-Ke Dai,Hong-Hua Ge,Yu-Zeng Zhao,Xin-Jing Meng
A Ti/SnO2–Sb–Cu–Zn electrode was prepared for the electrocatalytic oxidation of Acid Red 18 (AR18). The addition of Zn to the coating results in smaller surface cracks and greater roughness. When Cu and Zn coexist, high-index crystal planes are generated on smaller-sized grains formed on the coating surface, which allows the coating surface to adsorb oxygen. Sb5+ and the adjacent Cu2+–Zn2+ on the surface of the Cu–Zn co-doped coating are the advantageous active sites for adsorbed oxygen. The electrode exhibits a larger electrochemically active surface area and smaller electrochemical reaction resistance. The appearance of high-index crystal planes is beneficial to improve the electrocatalytic activity of the electrode, although the oxygen evolution potential of the electrode is not greatly improved. Cu–Zn co-doping produces synergistic mineralisation and enhances the ability to degrade AR18, and ˙OH is the main active species. During the thermal decomposition of the coating, Zn induces Cu to form more active sites on the high-index crystal planes of SnO2, a phenomenon that may be responsible for the synergistic production of more reactive oxygen species on the electrode surface.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2022
·
IF 5.141
Zekai Sheng,Fengming Hou,Leilei Zou,Yihang Li,Jiaxin Li,Jin Li,Libang Ai,Wei Wei,Ang Wei
Aspergillus fumigatus ( A. fumigatus ) is a representative significant pathogenic fungus and its spores are arduous to inactivate. Herein, an efficient and environmental-friendly photocatalytic method to eliminate A. fumigatus spores was demonstrated. Zn-Ti layered double hydroxide (Zn-Ti LDH), showed the admirable activity with above 99.34% disinfection rate under visible light illumination for 6 h. The compelling sterilization activities were ascribed to the potent synergistic effect of zinc ions (Zn 2+ ) and reactive oxygen species (ROS). The attack of these species caused the eradication of fungal cell structure, and resulting in the leakage of cytoplasmic as demonstrated by scanning electron microscope, confocal laser scanning microscope and potassium ions (K + ) leakage test. In addition, Zn-Ti LDH released Zn 2+ and ROS only under visible light irradiation, which endows the material light-triggered bactericidal property. Overall, these findings not only provide a green and sustainable way to control A. fumigatus contaminations, but also can be as an example to control other toxic fungi in future study.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Ben Niu,Zhengang Li,Shuwei Cai,Die Luo,Yu Qiao,Shiyuan Zhou,Hongfei Li,Xianru He,Xin Wang
Artificial polymer coating on Zn metal anode is an available strategy to address a series of notorious parasitic side reactions at Zn anode/aqueous electrolyte in aqueous Zn-based electrochemical devices. However, most hydrophilic polymer layers suffer from risks of being dissolved in aqueous electrolyte during long-term cycle process. The traditional coatings with strong adhesion to metal are often hydrophobic which intensely increase the interfacial resistance at Zn electrode/aqueous electrolyte and further restrain the interfacial ion transportation/migration. In this study, a hydrophilic adhesive coating (HAC) with proportionally distributed amides and acrylates is designed to circumvent this hydrophilicity/adhesion trade-off. The layer shows great ion-regulating capability in Zn 2+ plating/stripping, thanks to the evenly distributed abundant carbonyl adsorption sites at the molecular level. Benefiting from the hydrophilic nature and long-lasting adhesion of the coating to the electrode, the HAC-modified Zn-Zn symmetric cell is able to deliver a long cycle life of 880 h at 5 mA cm −2 /5 mAh cm −2 , compared to 20 h for Bare Zn. The Zn-Ti asymmetric cell also exhibits excellent reversibility with an average coulombic efficiency of 97.6% after 200 cycles at 5 mA cm −2 . The HAC-modified Zn-AC ion hybrid supercapacitor retains 100% of the initial capacity for a long life of 14,000 cycles. This hydrophilic functionalization of hydrophobic coating provides new design strategies and prospects for Zn anode artificial interface towards practically useful zinc-ion energy storage devices.
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2022
·
IF 3.754
Man Wang,Jun Wang,Mengjun Li,Xinru Wang,Yating Sima,Qiang Wu
Hexagonal Zn–Al hydrotalcite (Zn–Al LDHs) has become a research hotspot in the field of photocatalysis due to efficient photocatalytic performance, low cost and non-toxicity. In this research, In 2 S 3 /Zn–Al LDHs composites were firstly synthesized by one-pot method with InCl 3 and TAA as raw materials. The crystalline structure, surface morphology , chemical composition, together with optical properties of the samples were investigated by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), high-resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectra (FT-IR), UV–Vis diffuse reflectance spectrometry (DRS), and Photoluminescence spectra (PL). The photocatalytic performance of the composite photocatalyst was investigated by degradation of tetracycline (TC) under visible-light irradiation. The photochemical properties and cyclic stability of the photocatalyst were further explored. Experimental results display that the photocatalytic efficiency of In 2 S 3 /Zn–Al LDHs (1:2) was remarkably superior to that of pure In 2 S 3 and Zn–Al LDHs. In 2 S 3 /Zn–Al LDHs (1:2) composite showed high photocatalytic activity for TC degradation (92.2% within 30 min). The modification of Zn–Al LDHs by In 2 S 3 prompted the separation of photogenerated electron-hole pairs and thus improved the photocatalytic performance. It can be inferred that the efficient photocatalytic performance of In 2 S 3 /Zn–Al LDHs composites could remove many hazardous pollutants in wastewater.
✓ 已验证
产品关联
DOI
高影响因子
POLYMER DEGRADATION AND STABILITY
·
2022
·
IF 5.204
Mei Li,Tianxiang Deng,Haiyang Ding,Na Yao,Lina Xu,Xiaohua Yang,Jianling Xia,Shouhai Li
In this work, the adduct of maleic anhydride and methyl eleostearate (MAME) and dimer fatty acid (DFA) were converted to the sodium and zinc salts (L-Zn-MAME, L-Na-MAME, L-Zn-DFA, and L-Na-DFA), respectively, which were subsequently turned into Na/Zn composite liquid stabilizers(LTS-Na/Zn-MAME and LTS-Na/Zn-DFA) by formula combination. Na salts, Zn salts and mixed Na/Zn salts from these fatty acid salts were used as thermal stabilizers for poly(vinyl chloride) (PVC). The chemical structures of MAME , DFA, and their liquid zinc and sodium salts were verified using Fourier transform infrared (FTIR) spectra. Thermal stability and mechanical properties of the sodium and zinc salts, and their Na/Zn composite liquid stabilizers derived from MAME and DFA for PVC were investigated using discoloration and dynamic mechanical analyses, TGA-FTIR-MS, thermal decomposition kinetics, and Congo red and tensile tests. Thermal stability of pure PVC is poor, but membrane thermal stability can be improved by integrating thermal stabilizers. Results show that L-Na-MAME has an outstanding synergistic effect with the commercial general calcium/zinc stearate composite heat stabilizer(CaSt 2 /ZnSt 2 ). CaSt 2 /ZnSt 2 /LTS-Na-MAME, LTS-Na/Zn-MAME and CaSt 2 /LTS-Zn-DFA/LTS-Na-DFA also have a better heat-stabilizing impact on PVC than CaSt 2 /ZnSt 2 , especially LTS-Na/Zn-MAME can more effectively enhance the primary coloring of PVC. In comparison to blank PVC and PVC/CaSt 2 /ZnSt 2 , both PVC/LTS-Na/Zn-MAME and PVC/LTS-Na/Zn-DFA display a larger elongation at break and acceptable tensile strength. The new stabilizers can largely enhance the heat stability of PVC resins, endowing PVC products with good plasticization performance, and can fully or partially replace the general calcium zinc stearate composite heat stabilizer and other heat stabilization products.
✓ 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）