JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
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2023
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IF 6.1
Jing Xu,Zezhong Li,Zhenlu Liu,Shengming Xu,Xinyu Liu
A novel composite is constructed by loading ZIF-8 on Cu 2 O by in situ growth. By visible light driven semiconductor and π-π* conjugation effect of the metal–organic framework, the migration ability of photogenerated carriers is improved, and electrons are accumulated to participate in hydrogen ion reduction. The superior hydrogen evolution performance (981.8 μmol·g −1 ·h −1 ) and stability test indicate that the coupling of ZIF-8 and semiconductor Cu 2 O successfully improves the catalytic capacity of the material. Cu 2 O provides a place to stimulate activity for ZIF-8 with high specific surface area. The electron transfer mechanism in composites is studied by electrochemical and spectroscopy methods. This work also provides a new opportunity for the in-situ growth of metal–organic frame materials onto single-metal oxides.
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APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Jiawen Xu,Xiumin Shi,Mingyue Yi,Yanze Chi,Shuang Guo,Zhu Mao,Bing Zhao,Young Mee Jung
Noble metal-based surface-enhanced Raman scattering (SERS)-active substrates have been developed for decades. However, nonreproducible aggregation and photoinduced molecular degradation limit the development of SERS technology. To overcome the shortcomings of noble metal-based SERS substrates, we designed ZrO 2 -based nanoparticles (NPs). By doping Mg and/or Zn ions into these ZrO 2 NPs , the SERS activity was significantly improved. Mg/Zn codoping of ZrO 2 resulted in a much higher oxygen deficiency, thereby providing a sufficient surface state energy (Ess) level to enable charge transfer (CT). The primary contribution for the Mg/Zn-codoped ZrO 2 was determined to be from the CT resonance effect, resulting in an enhancement factor (EF) as high as 10 4 . Most importantly, the CT-induced enhancement of Raman scattering based on Mg/Zn-codoped ZrO 2 has already demonstrated some promising applications in highly sensitive quinolone antibiotic drug determination. Different kinds of quinolone antibiotic drugs can be easily identified and quantitatively analyzed with high sensitivity and reproducibility.
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Electrocatalysis
·
2022
·Vol. 14
·期 1
·29-38
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IF 2.933
Fang Yu,Yu Yu,Zhao Wei,Yang Pengxin,Huang Tao,Gao Shan
Electrocatalytic CO 2 conversion to value-added chemicals is a fascinating strategy for the sustainable recycling of greenhouse gas while developing a facile synthesis method for highly efficient electrocatalysts remains a great challenge. Herein, the spontaneous alkali corrosion combined with in situ electrochemical restructuring strategy was developed to fabricate the self-supporting Zn nanosheets array (Zn NSs) on Zn foil for CO 2 electroreduction. The in situ transformed two-dimensional Zn NSs provide larger active area and show faster reaction kinetics and electron transfer rate compared with Zn nanoparticles and Zn foil, thus exhibiting outstanding performance for electrocatalytic CO 2 to CO: j CO is 9.9 mA cm −2 and 19.8 mA cm −2 at −0.9 and −1.0 V vs. RHE, respectively; Faraday efficiency (FE) of CO reaches 92% at −0.9 V vs. RHE; the stability can remain 14 h at −0.9 V vs. RHE. This work provides a facile and low-energy-consumption method to fabricate efficient electrocatalysts for CO 2 recycling. Graphical Abstract The present work presents simple spontaneous corrosion and in situ electrochemical restructuring strategy to get Zn nanosheets for electrocatalytic reduction of carbon dioxide, featuring its synthetic strategy and electrocatalytic CO 2 reduction performance.
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CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Shunzhang You,Dao-Sheng Liu,Minghui Ye,Yufei Zhang,Yongchao Tang,Xiaoqing Liu,Cheng Chao Li
Aqueous zinc-ion batteries (ZIBs), the next promising energy technology with outstanding specific capacity, environmental friendliness, and safety, suffer from the dendritic growth and corrosion of Zn anode along with the release of hydrogen. To solve these issues, the graphite intercalation compounds of molybdenum chloride (MoCl 5 − GICs) are used as multi-functional interface layers to protect Zn anodes, inhibiting the parasitic reaction to improve the Coulombic efficiency (CE) of ZIBs. The MoCl 5 − GICs-coated Zn (Zn@MGs) exhibits the uniform deposition of Zn 2+ ions and enhances the transmission of Zn 2+ ions, given that the interfacial protection of MoCl 5 − GICs possesses high transference number of Zn 2+ ions (0.316), good ionic conductivity (9.45 × 10 −4 S cm −1 ), and low desolvated activation energy (1.88 kJ mol −1 ). Consequently, the symmetric Zn@MGs cell shows an excellent cycling stability for 2000 h at a current density of 1 mA cm −2 within an areal capacity of 1 mAh cm −2 . And it also delivers a long lifespan of 1300 h cycling at a high current density of 5 mA cm −2 . Paired with a NaV 3 O 8 ·1.5H 2 O (NVO) cathode, the Zn@MGs‖NVO full cell exhibits a splendid capacity retention of 63.8 % after 3000 cycles at 5 A g −1 . Therefore, the strategy of constructing multi-functional interface layer is a valuable method to facilitate the development of ZIBs.
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MATERIALS CHEMISTRY AND PHYSICS
·
2022
·
IF 4.778
Xijun Li,Sifan Zhang,Lihua Zhu,Jun Liu,Huan Zhang,Ning Zhao,Bing Hui Chen
Herein, a series of the Pt-based bimetallic catalysts (PtM x /SBA-15) are gained by using ultrasonic incipient wetness impregnation method (M = Co, Cu, Ni or Zn). The experimental results show that the catalytic performance (including catalytic activity (turnover frequency-TOF), selectivity to crotyl alcohol) of PtCo x /SBA-15 for catalyzing crotonaldehyde selective hydrogenation is the best among PtM x /SBA-15. Additionally, the ratio of Pt/Co in the PtCo x /SBA-15 catalysts is changed to successfully synthesize PtCo/SBA-15, PtCo 2 /SBA-15, PtCo 5 /SBA-15. It demonstrates that the selectivity of the PtCo x /SBA-15 catalysts for crotonaldehyde selective hydrogenation to crotyl alcohol is significantly improved with the increase of the Co content. The PtCo 5 /SBA-15 catalyst provides 83.8% conversion of crotonaldehyde, 94.3% selectivity to crotyl alcohol and TOF of 910.5 h −1 under mild reaction conditions (3.0 MPa H 2 , 80 °C and 2.0 h). And PtCo 5 /SBA-15 has much better catalytic performance (higher catalytic activity and selectivity to crotyl alcohol) than PtCu 5 /SBA-15, PtNi 5 /SBA-15 and PtZn 5 /SBA-15. The reasons are as follows: (1) PtCo alloy forms, which is conducive to crotonaldehyde adsorption and activation; (2) there is an appropriate synergy effect between Pt and Co, greatly improving the capacity of the catalyst activating hydrogen under mild conditions; (3) the electron transfers from Co to Pt, resulting in the increase of Pt electron density and decrease of Co electron density, then the Co sites are advantageous to C O group adsorption and activation and Pt sites for H 2 adsorbing and activating; (4) with the increase of the Co proportion in PtCo x /SBA-15, the synergy effect between Pt and Co in PtCo alloy strengthens and thus increases the selectivity of C O group hydrogenation.
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CHEMICAL PHYSICS LETTERS
·
2022
·
IF 2.719
Xiaoli Song,Yuxiu Fu,Yaming Pang,Liguo Gao
La and Zn species were used to modify HZSM-5 zeolite, which was used to treat phenol in wastewater. Through the combination of multiple direct tools, La and Zn species were successfully loaded into the HZSM-5 zeolite. La-Zn/HZSM-5 zeolite has a small band gap and the catalyst can produce highly active electrons and electron holes when energy enters. The HZSM-5 zeolite after modification improves activity and stability of the catalyst. Therefore, it has a significant effect in the phenol removal experiment. Adding 1.2 mL of hydrogen peroxide and 0.11 g of catalyst, the removal rate can reach 99.38 % after being irradiation with a mercury lamp at 60 °C for 180 min. La-Zn/HZSM-5 zeolite has great potential in the application of photocatalytic degradation of phenol.
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FUEL
·
2022
·
IF 8.035
Zixuan Ma,Fenghai Cao,Yuhao Yang,Liyan Wang,Tao Zhang,Minghui Tan,Guohui Yang,Yisheng Tan
Bifunctional catalysts composed of ZnCrO x oxide and ZSM-5 were widely used in syngas-to-aromatics (STA). The CO conversion on bifunctional catalysts was generally higher than that on oxide catalysts attributed to the pulling effect of zeolite, but the key factor for the improvement of CO conversion was still short of systematical explanation. In this work, the degree of nonstoichiometric spinel of ZnCrO x (ZxC) oxides was finely tuned through modulating the ratio of Zn/Cr, which could significantly influence the catalytic behaviors of ZnCrO x /ZSM-5 catalysts for the CO hydrogenation to aromatics. The increase of nonstoichiometric spinel corresponded to the increase of oxygen vacancies and the enhancement of Zn-Cr synergistic effect, which promoted the activation of H 2 and CO, leading to a dramatic increase of CO conversion. The work revealed that the action of ZnO and oxygen vacancies was the key factor for CO pulling in ZnCrO x oxide and ZSM-5 catalyzed STA reaction.
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Virtual and Physical Prototyping
·
2022
·
IF 10.962
Mingli Yang,Yang Shuai,Youwen Yang,Da Zeng,Shuping Peng,Zongjun Tian,Cijun Shuai
Carbon nanofibre (CNF) is a potential reinforcement in Zn implants. Nevertheless, its poor interfacial compatibility reduces the reinforcement efficiency drastically. In this study, rare earth lanthanum (La) was used as a compatible interface layer between CNF and Zn matrix. On the one hand, La in situ grew on acidified CNF by a chemical synthesis and achieved a firm coordination covalent bond with the oxygenated functional group derived from CNF. On the other hand, La, as an active rare earth element, could carry out the alloying reaction with the Zn matrix, thus forming strong metal bonding. Results showed that the tensile strength of composites was enhanced from 180.2 ± 12.1 to 243.4 ± 10.2 MPa since the La interface layer promoted the transfer of the interfacial shear stress from the Zn matrix to CNF and thereby consumed massive fracture energy. Encouragingly, it simultaneously improved the ductility, as La activated basal slip and improved the dislocation accommodation capacity. Moreover, the Zn implants displayed excellent anti-tumour efficiency.
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ACS Sustainable Chemistry & Engineering
·
2022
·
IF 9.224
Fangqing Liu,Hui Peng,Yumao Kang,Yaxin Hao,Lifang Li,Hongyuan Xin,Huichun Kang,Wei Wang,Ziqiang Lei
Metal–organic frameworks (MOF) are versatile and good structurally stable materials that are widely used in energy conversion and storage. In this work, rare-earth-based bimetallic metal–organic framework (NiY-BTC) nanorods anchored with transition metal–organic frameworks (ZIF-67) were used as versatile precursors to prepare novel metal/rare-earth metal oxide-coupled carbon-based bifunctional oxygen electrocatalysts (NiY/C@Co/C). Due to the stable nanorods framework structure, appropriate Y2O3 active center, and richness of Co–N sites in the carbon skeletons, the NiY/C@Co/C catalyst exhibits high onset potentials (Eonset = 0.928 V) and half-wave potential (E1/2 = 0.83 V) for the oxygen reduction reaction (ORR), and expresses a low overpotential (η = 392 mV@10 mA cm–2) for the oxygen evolution reaction (OER). Moreover, a rechargeable Zn–air battery assembled with NiY/C@Co/C as the air cathode catalyst displayed a great specific capacity (899.6 mAh gZn–1) and a remarkable peak power density of 102.2 mW cm–2, as well as excellent durability and stability. This work delivers a way using rare-earth metal–organic frameworks to get the corresponding metal oxide-coupled carbon-based bifunctional oxygen electrocatalysts for rechargeable Zn–air batteries.
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Nature Communications
·
2022
·Vol. 13
·期 1
·1-10
·
IF 17.694
Wang Qichen,Feng Qingguo,Lei Yongpeng,Tang Shuaihao,Xu Liang,Xiong Yu,Fang Guozhao,Wang Yuchao,Yang Peiyao,Liu Jingjing,Liu Wei,Xiong Xiang
Quasi-solid-state Zn-air batteries are usually limited to relatively low-rate ability (<10 mA cm −2 ), which is caused in part by sluggish oxygen electrocatalysis and unstable electrochemical interfaces. Here we present a high-rate and robust quasi-solid-state Zn-air battery enabled by atomically dispersed cobalt sites anchored on wrinkled nitrogen doped graphene as the air cathode and a polyacrylamide organohydrogel electrolyte with its hydrogen-bond network modified by the addition of dimethyl sulfoxide. This design enables a cycling current density of 100 mA cm −2 over 50 h at 25 °C. A low-temperature cycling stability of over 300 h (at 0.5 mA cm −2 ) with over 90% capacity retention at −60 °C and a broad temperature adaptability (−60 to 60 °C) are also demonstrated.
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PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Jiali Song,Yu Gao,Guoguo Tan,Qikui Man,Zhi Wang
Spinel ferrites are widely used for electromagnetic wave (EMW) absorption applications. In this study, spinel Ni–Zn ferrites with excellent microwave absorption properties were synthesized. Their EMW absorption characteristics and interaction mechanisms were studied to lay the foundation for the study of the role of Ni–Zn ferrite as a magnetic substrate for composites. Herein, Ni 0 · 5 Zn 0 · 5 Fe 2 O 4 was prepared by the hydrothermal method (H-NZFO) and the sol–gel auto-combustion method (S-NZFO); both samples exhibited distinct microwave absorption properties. The S-NZFO absorber (thickness = 3.72 mm) demonstrated the best dual-zone microwave absorption with two strong reflection loss peaks at 5.1 and 10.5 GHz. The corresponding effective absorption bandwidth (EAB) reached 9.0 GHz, which covered part of the S-band and all of the C- and X-bands. These results were attributed to the high saturation magnetization, outstanding complex permeability, and multiple magnetic loss channels of S-NZFO. The H-NZFO sample exhibited excellent absorption capability and matching thickness. At a thickness as low as 1.71 mm, the minimum reflection loss ( RL min ) of the H-NZFO absorber reached -60.2 dB at 13.1 GHz. The maximum bandwidth corresponding to RL below -10 dB was 4.6 GHz. These results can be attributed to small particle size, high complex permittivity, and multiple dielectric loss channels of H-NZFO. The observed wide effective absorption bandwidth of S-NZFO and strong microwave absorption capability of H-NZFO suggest the potential of both materials as substrates for efficient microwave absorbers in military as well as civilian absorption applications.
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Nanoscale
·
2022
·Vol. 14
·期 24
·8640-8648
·
IF 8.307
Tao Chen,Changyu Yang,Xuewen Hu,Qicheng Zhang,An Cai,Huibin Liu,Yang Li,Wenchao Peng,Fengbao Zhang,Xiaobin Fan
Aqueous rechargeable zinc-ion batteries (ZIBs) are emerging in grid energy storage due to zinc abundance and intrinsic safety. However, developing suitable cathode materials with satisfactory stability and rate capacity remains a great challenge. Herein, a structure of layered MXene derived nanoporous VOx wrapped with graphene nanosheets (rGO–VOx) is constructed as a cathode for ZIBs. The incorporation of two typical 2D materials imparts composites with shortened diffusion pathways and increased electrical conductivity. Thus, the rGO–VOx cathode exhibits a remarkable rate capability of 196 mA h g−1 at 8 A g−1 and long-term stability with 90% retention after over 1200 cycles at 5 A g−1 in an aqueous coin cell. The Zn storage mechanism is also systematically investigated. The layered V2O5 transforms into layered ZnxV2O5·nH2O with larger interspacing upon cycling. NaV6O15 and the in situ formed ZnxV2O5·nH2O co-contribute to the subsequent insertion and extraction process.
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