Materials Today Energy
·
2022
·
IF 9.257
Xinxin Bian,Bowen Liu,Xiaolei Wang,Zhimin Chen,Rui Gong,Wanqi Jia,Zichen Song,Huiyuan Meng,Weibo Yin,Zhiyu Ren
Defects engineering is one of the effective strategies to advance the CO 2 conversion into value-added chemicals and fuels during the electrochemical process. It is noteworthy that multiple defects are often associated in the reaction process, hence how to stimulate their synergistic effect is extremely important, but still lacks in-depth understanding. Herein, SnO 2 nanosheets with simultaneous oxygen vacancies and Zn dopants (Zn–Vo–SnO 2 ), as a proof-of-concept study, were proposed to elucidate the synergistic effect of multiple defects on enhanced CO 2 -to-C 1 conversion. Zn–Vo–SnO 2 , which is prepared by coupling a facile hydrothermal reaction and a subsequent desulfurization, yields the C 1 products at the lower applied potential, and maintains the FE C1 of about 95% at −0.80 V vs. RHE for a long-term operation. Evidences from systematic experiment and theoretical calculation corroborate that the charge redistribution caused by the oxygen vacancies and Zn-doping synergistically energize the CO 2 conversion, in the term of the CO 2 adsorption, the hydrogenation of CO 2 and intermediates, and the thermodynamic energies of the rate-determining steps. This study has an insight into defect engineering to design advanced electrocatalysts for implementable CO 2 recycling and utilization.
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Sustainable Chemistry and Pharmacy
·
2022
·
IF 5.464
Zhenwei Zhang,Xiaoshi Ma,Chuanjun Yue,Xuejiao Wei,Baoliang Liu,Xiaohui Chen
Hazardous waste alkaline batteries and waste fatty acids significantly threaten the environment. In this study, waste alkaline batteries were simply transferred to r-MnZn catalysts, which were then applied in the ketonization of fatty acids. The assessment results show that r-MnZn can efficiently convert n-octanoic acid to 8-pentadecanone. The conversion and yield are evaluated as 100% and 92.9%, respectively, which are much better than those of TiO 2 , ZrO 2 , CeO 2 and other metal oxides . The excellent catalytic efficiency is derived from the MnO 2 nanorods in r-MnZn materials which are characterized by XRD, TEM, and XPS. In addition, when using different kinds of fatty acids in ketonization, longer carbon chains require a higher activation energy, and the conversion of fatty acids was lower. Furthermore, the ketone products have a short carbon chain that induces side reactions, leading to a low yield. The above results indicate that r-MnZn is an efficient catalyst applied in the ketonization of fatty acids.
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Nano-Micro Letters
·
2022
·Vol. 14
·期 1
·1-13
·
IF 23.655
Shang Wenshuo,Li Qiang,Jiang Fuyi,Huang Bingkun,Song Jisheng,Yun Shan,Liu Xuan,Kimura Hideo,Liu Jianjun,Kang Litao
Highlights
High-performance Zn||I 2 batteries were established by coating zeolite protecting layers.
The Zn 2+ -conductive layer suppresses I 3 − shuttling, Zn corrosion/dendrite growth.
The Zeolite-Zn||I 2 batteries achieve long lifespan (91.92% capacity retention after 5600 cycles), high coulombic efficiencies (99.76% in average) and large capacity (203–196 mAh g −1 at 0.2 A g −1 ) simultaneously.
Abstract The intrinsically safe Zn||I 2 battery, one of the leading candidates aiming to replace traditional Pb-acid batteries, is still seriously suffering from short shelf and cycling lifespan, due to the uncontrolled I 3 − -shuttling and dynamic parasitic reactions on Zn anodes. Considering the fact that almost all these detrimental processes terminate on the surfaces of Zn anodes, modifying Zn anodes’ surface with protecting layers should be one of the most straightforward and thorough approaches to restrain these processes. Herein, a facile zeolite-based cation-exchange protecting layer is designed to comprehensively suppress the unfavored parasitic reactions on the Zn anodes. The negatively-charged cavities in the zeolite lattice provide highly accessible migration channels for Zn 2+ , while blocking anions and electrolyte from passing through. This low-cost cation-exchange protecting layer can simultaneously suppress self-discharge, anode corrosion/passivation, and Zn dendrite growth, awarding the Zn||I 2 batteries with ultra-long cycle life (91.92% capacity retention after 5600 cycles at 2 A g −1 ), high coulombic efficiencies (99.76% in average) and large capacity (203–196 mAh g −1 at 0.2 A g −1 ). This work provides a highly affordable approach for the construction of high-performance Zn-I 2 aqueous batteries.
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Energy Storage Materials
·
2022
·
IF 20.831
Yongpeng Li,Qun Guan,Jianli Cheng,Bin Wang
The conductivity and structural intrinsic stability of cathode materials are the barriers to achieve high-performance fiber-shaped Zn-ion batteries (FZIBs). Here, amorphous H 0.82 MoO 3.26 coated on carbon nanotubes fiber (noted as CHMO) is exploited as cathode materials for aqueous FZIBs with high energy density , excellent cycle stability and good omnidirectional flexibility. The amorphous H 0.82 MoO 3.26 improves electron transfer and accelerates electrochemical reaction kinetic, as well as effectively suppresses structural degradation during repeated charge/discharge process. Meanwhile, the electrochemical behaviors combined with a series of in-situ/ex-situ characterizations verify that Zn 2+ and H + ions insert/extract into/from the CHMO fiber reversibly at the same time. The assembled battery delivers high energy density of 32.1 mWh cm -3 (based on the volume of cathode) and excellent capacity retention of about 67% after 5000 cycles at 700 mA cm -3 , as well as splendid flexibility (about 91% capacity retention after bending 3500 times). Wearable NO 2 gas sensor and pressure sensor integrated with fiber-shaped Zn//CHMO battery are also fabricated, which can operate stably with stable signal output.
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DALTON TRANSACTIONS
·
2022
·Vol. 51
·期 14
·5624-5634
·
IF 4.569
Jia Wang,Xiange Huang,Hegen Li,Deyue Yan,Wei Huang
Here two Zn(II) coordination polymers [Zn20(DMCA)12]O12 (DMCA = demethylcantharic acid, DMCA-Zn1) and [Zn(DMCA)](H2O)2 (DMCA-Zn2) are synthesized from a broad-spectrum anticancer drug norcantharidin (NCTD) and Zn(NO3)2·6H2O under solvothermal conditions. By mechanical grinding with a biocompatible polymeric surfactant F127, ultrasonic treatment and filtration, DMCA-Zn1 and DMCA-Zn2 can be transformed into stable nanoparticles (DMCA-Zn1 NPs and DMCA-Zn2 NPs) suspended in water with average diameters of around 190 nm and 162 nm for drug delivery. The in vitro evaluation indicates that DMCA-Zn1 NPs and DMCA-Zn2 NPs can enter into HepG2 and Hep3B cancer cells via endocytosis and inhibit their proliferation. Meanwhile they exhibit relatively low toxicity to L927 normal cells. The in vivo evaluation confirms that DMCA-Zn1 NPs and DMCA-Zn2 NPs can more effectively inhibit the growth of Hep3B tumors with relatively few side effects compared with free NCTD. This approach can be extended to other anticancer drugs to construct nanodrug delivery systems for cancer treatment.
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Energy & Environmental Materials
·
2022
·Vol. 6
·期 2
·e12357
·
IF 13.443
Yuqi Jiang,Kun Ma,Meiling Sun,Yuanyuan Li,Jinping Liu
Hybrid supercapacitors have shown great potentials to fulfill the demand of future diverse applications such as electric vehicles and portable/wearable electronics. In particular, aqueous zinc-ion hybrid supercapacitors (ZHSCs) have gained much attention due to their low-cost, high energy density, and environmental friendliness. Nevertheless, typical ZHSCs use Zn metal anode and normal liquid electrolyte, causing the dendrite issue, restricted working temperature, and inferior device flexibility. Herein, a novel flexible Zn-ion hybrid supercapacitor (FZHSC) is developed by using activated carbon (AC) anode, δ-MnO 2 cathode, and innovative PVA-based gel electrolyte. In this design, heavy Zn anode and its dendrite issue are avoided and layered cathode with large interlayer spacing is employed. In addition, flexible electrodes are prepared and integrated with an anti-freezing, stretchable, and compressible hydrogel electrolyte, which is attained by simultaneously using glycerol additive and freezing/thawing technique to regulate the hydrogen bond and microstructure. The resulting FZHSC exhibits good rate capability, high energy density (47.86 Wh kg −1 ; 3.94 mWh cm −3 ), high power density (5.81 kW kg −1 ; 480 mW cm −3 ), and excellent cycling stability (~91% capacity retention after 30 000 cycles). Furthermore, our FZHSC demonstrates outstanding flexibility with capacitance almost unchanged even after various continuous shape deformations. The hydrogel electrolyte still maintains high ionic conductivity at ultralow temperatures (≤−30°C), enabling the FZHSC cycled well, and powering electronic timer robustly within an all-climate temperature range of −30~80°C. This work highlights that the promising Zn metal-free aqueous ZHSCs can be designed with great multifunctionality for more practical application scenarios.
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JOURNAL OF VINYL & ADDITIVE TECHNOLOGY
·
2022
·Vol. 28
·期 4
·719-725
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IF 2.297
Deling Li,Congcong Luo,Bing Yao,Yue Ding,Jizhen Ren
Lanthanum complex with curcumin (La L 2 )/Ca-Zn composite stabilizer was prepared using La L 2 and Ca-Zn stabilizer, in which Ca-Zn stabilizer was obtained from calcium stearate and zinc stearate at their mass ratio of 5:1. The rheological properties and dynamic thermal stability of polyvinyl chloride (PVC) stabilized by La L 2 /Ca-Zn composite stabilizers were estimated through a torque rheometer. The degraded fragments obtained from the torque experiments were measured by Fourier-transform infrared spectroscopy (FTIR) and ultraviolet–visible (UV-vis) spectroscopy. La L 2 had an effective synergistic effect with Ca-Zn stabilizer. Compared with La L 2 , La L 2 /Ca-Zn composite stabilizer could more significantly improve the rheological properties and dynamic thermal stability of PVC. An optimal synergistic effect could be observed when the mass ratio of La L 2 with Ca-Zn stabilizer was about 8:2, in which the plasticizing torque and equilibrium torque of PVC was 33.3 N m and 22.5 N m, respectively, and its dynamic thermal stabilizing time was 25.1 min. The possible thermal stability mechanism of La L 2 /Ca-Zn composite stabilizer for PVC was suggested based on the evaluation of FTIR spectroscopy and UV-vis spectroscopy.
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ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Yang Lei,Yongjing Liu,Qiang Liu,Zhengbin Xu,Bo You,Xiaoliang Mo,Limin Wu,Heng Man,Wenxia Ma,Haitao Wang
The service life of metal and other infrastructure requires extending through eco-friendly, low-carbon technology. Here, a nacre-mimetic γ-Fe2O3/reduced graphene oxide (FrGO)/zinc-containing epoxy coating (FrGO/Zn/epoxy coating) was fabricated by spraying a mixture of waterborne epoxy resin, zinc flakes, and magnetic conductive FrGO under a magnetic field. The FrGO, which was synthesized by in situ redox and precipitation, was aligned in the zinc-containing coatings (ZCC), and it oriented the zinc flakes in the direction of the magnetic field to mimic the lamellar structure of nacre. The obtained anti-corrosion coating showed enhanced barrier protection and cathodic protection, which was confirmed by the electrochemical tests and salt spray test results. The waterborne coatings less than 50 μm thick with parallelly aligned FrGO and 30 wt % zinc flakes exhibited a long cathodic period lasting more than 99 days and excellent barrier performance with a high initial coating resistance of 5.31 × 109 Ω·cm2, which was superior to that of the conventional zinc-rich coating containing 80 wt % zinc (80 days, 3.74 × 103 Ω·cm2). The dual anti-corrosion mechanism of the waterborne FrGO/Zn/epoxy coating was investigated. The integrity and long-term cathodic protection of the coatings were derived from the compactness achieved by the nacre-mimetic structure and the interface chemical and hydrogen bonding crosslinking interactions and the high, uniform zinc utilization achieved by the aligned FrGO-Zn charge transmission network. This work provides a feasible nacre-inspired strategy to fabricate a lightweight anti-corrosion waterborne ZCC that is resource-efficient and promising in creating compact materials with other functional properties, such as electromagnetic shielding and conductive networks.
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ACS Nano
·
2023
·
IF 17.1
Guosheng Duan,Yang Wang,Leilei Sun,Zhean Bao,Bin Luo,Sinan Zheng,Zhizhen Ye,Jingyun Huang,Yingying Lu
Aqueous Zn metal batteries are considered promising energy storage devices due to their high energy density and low cost. Unfortunately, such great potential is at present obscured by two clouds called dendrite growth and parasitic reactions. Herein, trace amounts of sodium cyclamate (CYC-Na) are introduced as an electrolyte additive, and accordingly, an atomic-pinning-induced interfacial solvation mechanism is proposed to summarize the effect of trace addition. Specifically, coadsorption of −NH– and −SO3 groups overcomes the ring-flipping effect and pins the CYC anion near the Zn anode surface in parallel, which significantly modifies the Zn2+ solvation sheath at the interface. This process homogenizes the surface Zn2+ flux and reduces the H2O and SO42– content on the surface, thus eliminating byproducts and leveling Zn deposition. Cells with trace CYC-Na cycle stably for 3650 h and still cycle for 330 h at high depths of discharge of 56.9%. This work dispels the clouds for efficient trace additives for AZMBs.
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Laser & Photonics Reviews
·
2023
·Vol. 18
·期 1
·2300809
·
IF 11
Xiankun Zheng,Lijin Wang,Jialin Bai,Han Zhang,Hanzhuang Zhang,Aiwei Tang,Wenyu Ji
Currently, the performance of quantum-dot light-emitting diodes (QLEDs) based on environmental-friendly Cu─In─Zn─S quantum dots (QDs) still lags far behind that of Cd-QDs-based devices. Here it is demonstrated that the unique trap-related recombination in Cu─In─Zn─S QDs is mainly responsible for the low device efficiency. The luminous efficiency of Cu─In─Zn─S-based QLEDs is rather sensitive to the temperature and hole-transporting layers (HTLs) due to the susceptible thermal-related trappingdetrapping processes of holes in radiative Cu-related traps. The holes in Cu-related traps can be quenched by escaping to the valence band of the QDs or/and transferring to the adjacent HTLs. An HTL with low highest occupied molecular orbitals is desired to enhance the hole injection and hinder the aforementioned hole transfer. As a result, a high device efficiency of 6.0 cd A −1 is achieved at room temperature, which is attributed to suppressed HTL-induced emission quenching and efficient valence-band-dominated hole injection from HTL to the QDs. The device efficiency is further increased to 13.2 cd A −1 at 150K by suppressing thermal-induced quenching.
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Small
·
2024
·
IF 13
Cailin Qiao,Chao Wang,Huibo Luo,Yi Ma,Xiaogang Luo,Suyi Zhang,Danqun Huo,Changjun Hou
Hydrolytic enzymes are essential components in second-generation biofuel technology and food fermentation processes. Nanozymes show promise for large-scale industrial applications as replacements for natural enzymes due to their distinct advantages. However, there remains a research gap concerning glycosidase nanozymes. In this study, a Zn-based single-atom nanozyme (ZnN 4 -900) is developed for efficient glycosidic bond hydrolysis in an aqueous solution. The planar structure of the class-porphyrin N 4 material approximatively mimicked the catalytic centers of natural enzymes, facilitating oxidase-like (OXD-like) activity and promoting glycosidic bond cleavage. Theoretical calculations show that the Zn site can act as Lewis acids, attacking the C─O bond in glycosidic bonds. Additionally, ZnN 4 -900 has the ability to degrade starch and produce reducing sugars that increased yeast cell biomass by 32.86% and ethanol production by 14.56%. This catalyst held promising potential for enhancing processes in ethanol brewing and starch degradation industries.
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INORGANIC CHEMISTRY
·
2021
·
IF 5.165
Hao-Jing Ding,Ying Zhang,Xi Wang,Qiu-Ying Lin,Shu-Ming Zhang,Mei-Hui Yu,Ze Chang,Xian-He Bu
The construction and modulation of hierarchical pore structure in metal-organic frameworks (MOFs) has become a hot topic owing to the advantages of hierarchical pore MOFs (HP-MOFs) in matter storage and mass transfer related applications. Herein, we report the engineering of crystalline defect in a bimetallic MOF for the construction and tuning of HP-MOF. A microporous MOF system showing metal-center-dependent water stability, namely, {[M3F(bdc)3 tpt] (solvents)}n (M = Zn2+ and Ni2+, H2bdc = 1,4-benzenedicarboxylic acid, tpt = 2,4,6-tris(4-pyridyl)triazine), was utilized as a platform for the construction of HP-MOF. By tuning the Zn2+/Ni2+ ratio in the reactant, a bimetallic MOF with a highly tunable Zn2+/Ni2+ ratio could be obtained. The relatively labile Zn2+-based coordination bonding in the bimetallic MOF could be readily and targeted broken through water treatment for the engineering of crystalline defects-based hierarchical pore structure. The resultant HP-MOF reveals a dramatically increased pore volume with the presence of mesopore and macropore. In addition, the anionic framework of HP-MOF could be utilized for the selective adsorption of a cationic dye methylene blue, and a relatively high capacity (250 mg·g–1, five times compared with the pristine microporous MOF) could be achieved.
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