APPLIED CATALYSIS B-ENVIRONMENTAL
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2020
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IF 16.683
Zelin Wu,Yupeng Wang,Zhaokun Xiong,Zhimin Ao,Shengyan Pu,Gang Yao,Bo Lai
A core-shell metal-organic framework encapsulated Fe 3 O 4 magnetic particles (Fe 3 O 4 @Zn/Co-ZIFs) was designed and synthesized successfully to activate peroxymonosulfate (PMS) for carbamazepine (CBZ) degradation. It exhibits superior catalytic performance since the unique interior structure and synergistic effect between ZIFs shell and Fe 3 O 4 core, achieving 100% removal of CBZ (5 mg/L) within 30 min. The outer wrapping structure of ZIF-8 can stabilize the ZIF-67 and Fe 3 O 4 under intricate reaction conditions to restrain the leaching of Co ions (as low as 0.067 mg/L). Further investigation found that both SO 4 – and OH contribute to the degradation of CBZ at initial stage, and SO 4 – gradually plays a pivotal role with the reaction time prolonging. The acceleration of electron transfer between Fe 3 O 4 and cobalt active sites of Zn/Co-ZIFs could induce the redox cycling of Co 2+ and Co 3+ . The possible degradation pathway was proposed by analyzing intermediates. This work extends the development of MOFs materials for environmental remediation.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
·
2019
·
IF 4.178
Qin Sun,Wanchun Yang,Yihan Liu,Yufeng Li,Mingyu Li
Soda lime tempered glass was successfully joined by a Bi-B-Zn lead-free low-melting glass with a composition of 35Bi 2 O 3 -50H 3 BO 3 -15ZnO (mol%). The Bi-B-Zn glass exhibited a glass transition temperature (T g ), softening point (T d ) and crystallization temperature (T c ) of 346 ℃, 364 ℃and 448 ℃ respectively. The wettability of the glass on tempered glass substrate was investigated, and a contact angle of less than 13.94° was obtained when the temperature was raised to above 470 ℃ in open atmosphere. The microstructural evolution, interfacial bonding mechanism and mechanical properties of the joint at different joining temperatures were investigated. The diffusion bonding between Bi-B-Zn glass solder and tempered glass was achieved. The crystals of Bi 4 B 2 O 9 were detected in the joint when the joining temperature was higher than 450 ℃. The shear strength and Vickers hardness of the joint reached 35.14 ± 1.89 MPa and 191.55 ± 13.93 MPa, respectively. The effects of the fractions and size of Bi 4 B 2 O 9 on the shear strength were evaluated, and the fracture mechanism at the interface was also clarified.
研究领域:
材料科学
·
工程学
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2021
·
IF 6.609
Nai-Yu Yao,Jing-Pei Cao,Jing-Ping Zhao,Zi-Meng He,Xiao-Bo Feng,Tian-Long Liu,Ze-Ying Wang,Xiao-Yan Zhao
A series of Zn-containing HZSM-5 (HZ5) with hierarchical pores (xZn(DS)) were obtained by adding different amounts of Zn(NO 3 ) 2 solution in a hydrothermal synthesis process. The performances of xZn(DS) in catalytic reforming of cellulose pyrolysis volatiles were investigated at 500 °C. The results showed that the addition of Zn during synthesis increased in the total pore volume of xZn(DS) and reduced the content of strong acid sites, and introduced new weak acid sites. The Zn species were highly dispersed inside the zeolite, and enhanced the accessibility of acid sites, so that the yields of light aromatic hydrocarbons and monocyclic aromatic hydrocarbons (MAHs) over 0.7Zn(DS) (The molar ratio of ZnO/Al 2 O 3 in the synthesis process of xZn(DS) was 0.7) were higher than those over S-HZ5 (Zn was not added in the synthesis process) and commercial HZ5. Compared with S-HZ5, the yield of MAHs over 0.7Zn(DS) increased from 92.8 to 114.1 mg/g and the coke yield decreased by 2.9%. The selectivity of MAHs over 0.7Zn(DS) was 87.7%, which was 5.3% higher than that over S-HZ5. Simultaneously, the increase in mesopores of xZn(DS) accelerated the mass transfer process, shortened the diffusion path and improved the anti-coking performance of the catalysts. In addition, this study also proposed a possible mechanism for the catalyst to adjust the distribution of aromatic products and provided a new idea for promoting the selective production of MAHs for the pyrolysis of cellulose.
研究领域:
能源化学
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催化材料
✓ 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.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2021
·
IF 19.503
Guangyao Zhai,Yuanyuan Liu,Yuyin Mao,Honggang Zhang,Lingtong Lin,Yujie Li,Zeyan Wang,Hefeng Cheng,Peng Wang,Zhaoke Zheng,Ying Dai,Baibiao Huang
CO 2 cycloaddition reaction from propylene oxide and CO 2 to cyclic carbonates is a desirable process to become carbon neutral. Photo energy can decrease the temperature and pressure needed for this reaction according to our previous results. However, the relationship between Lewis acidity and the photophysical process needs to be clarified and optimized. Hence, in this work, Zn is introduced into UiO-bpydc via the coordination of Zn with the bipyridyl group in bpydc. It is found that the introduction of Zn not only effectively activate propylene oxide, but also promote ligand to metal charge transfer (LMCT) process, which ultimately is beneficial for CO 2 activation. However, Ce plays a negative effect under light irradiation. namely, the presence of Ce facilitates the energy transfer process rather than the LMCT process.
研究领域:
材料科学
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催化化学
·
光催化
✓ 已验证
产品关联
DOI
高影响因子
POLYHEDRON
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2019
·
IF 2.284
Lihong Qian,Yuqing Miao
The nanosheets of Co/Zn phosphate were deposited on nickel foam with the organized flower-like structure through a facile one-pot hydrothermal method. The resulted Co-Zn-P/NiFoam exhibits excellent electrocatalytic performance of oxygen evolution in basic solution and hydrogen evolution in acid solution with low onset potentials, high current responses, low Tafel slopes and good long-term stabilities. The nanosheet organized flower-like structure may contribute to the more active sites for target molecules, the higher efficiency for mass migration and electron transfer. The compact layer of Co/Zn phosphate may play a great role in its electrocatalytic stability for both OER in basic solution and HER in acid solution. This work offers a facile strategy to fabricate inexpensive and efficient electrocatalysts towards water splitting for possible applications in the future.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2018
·
IF 3.779
Jian-Zheng Zhen,Jian-Xiong Liu,Tian-You Chen,Feng Shi,Yong-Nian Dai,Bin Yang,Yun-Fei Li,Xiao Wang,Ting-Gu Nong,Yu-Qi Hu,Jin Shi
Developing of high efficient electrode materials for CO 2 reduction is very important in CO 2 conversion and recycling utilization. In this work, we have fabricated ZnS/Zn electrode using sulphur infiltration method. This method is a well-developed technology in surface treatment. ZnS/Zn electrode fabricated via sulphur infiltration method has a crucial advantage: because sulfur atomic is infiltrated into Zn substrate, a translation layer is formed and sandwiches between ZnS layer and Zn substrate. As a result, ZnS connects with Zn substrate firmly, and the exfoliation of ZnS layer from Zn substrate is avoided. The ZnS/Zn has been investigated as the cathode for CO 2 electro-reduction in propylene carbonate/tetrabutylammonium perchlorate (PC/TBAP) in membrane electrolysis cell. The current density of potentiostatic electrolysis remains stable at 6.72 mA/cm 2 at voltage −2.4 V and the faradaic efficiency of CO formation reaches to 92%. Comparing with Zn electrode, ZnS/Zn exhibits higher catalytic activity.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
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IF 5.518
Ping Shen,Yuanyuan Hu,Shanguo Ji,Hao Luo,Cuiping Zhai,Kai Yang
Hydrogel electrolytes are an attractive class of conductive materials for flexible energy storage devices given their reassuring flexibility and stable electrochemical performance . However, it still remains a challenge to assemble the smart battery with mechanical stability and self-healing property when suffering from inevitable physical damages. Here, a novel Zn 2+ -based polyacrylamide/halloysite nanotubes (PAAm/HNTs) nanocomposite hydrogel electrolyte is designed and prepared through rigid HNTs doped into the chemical cross-linked PAAm network. The PAAm/HNTs hydrogel with tensile performance, self-healing property and extended Zn 2+ transport channels was used as hydrogel electrolyte in Zn/MnO 2 batteries which possess an initial capacity of 347 mA h g 1 at a current density of 0.2 A g –1 with good cycle stability. This work offers an effective design method to improve strength , self-healing and fatigue resistance of nanocomposite hydrogel electrolytes which would provide alterative view for the construct of hydrogel electrolytes with desirable properties.
研究领域:
材料科学
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电化学
·
能量存储
✓ 已验证
DOI
高影响因子
ACS Applied Energy Materials
·
2022
·
IF 6.959
Fengxia Yang,Xiaofei Dong,Lei Yu,Xudong Sun,Jiangtao Chen,Yun Zhao,Yan Li
The cation ratio in Cu-poor and Zn-rich CZTSSe absorbers is key to decide the photovoltaic performance of CZTSSe solar cells, while its toleration and the influence mechanism is still not clear. In this work, for single-layer-structured CZTSSe absorbers spin-coated from metal chloride precursors with constant Cu and Zn values, the Zn/Sn ratio is regulated in the range of 0.8∼1.6. It is found that the Zn/Sn ratio has great influence on the morphology and electrical properties of the CZTSSe absorbers and thus the performance parameters of the CZTSSe cells. Comparatively, the results show that a 1.2 Zn/Sn ratio can boost the photovoltaic efficiency to 10.65% with a relatively high open-circuit voltage (VOC) of 481 mV and a reduced VOC-deficit of 585 mV. Detailed studies indicate that the 1.2 Zn/Sn ratio could favor the large-grain growth, increase the carrier concentration, suppress the carrier recombination, and reduce the band-tail effects and Urbach energy, thus leading to the highest efficiency with superior photovoltaic performance. The optimization of the Zn/Sn ratio in chloride precursor-coated CZTSSe absorbers would be beneficial for in-depth understanding of the effect mechanism of the element ratio on device performance.
研究领域:
材料科学
·
光伏技术
✓ 已验证
DOI
高影响因子
Carbon Energy
·
2025
·
IF 24.2
Mengmeng Ma,Runkang Lin,Kaige Huang,Shizhong Yue,Maohong Fan,Zhijie Wang,Shengchun Qu
Functionalization has emerged as a pivotal endeavor to tailor the surface properties of photocatalysts. We propose a facile amine functionalization strategy to establish a Cu−In−Zn−S (CIZS)/NiS x hybrid with covalent bonds using individual ethylenediamine (EDA) molecules. Our approach witnesses a remarkable photocatalytic hydrogen evolution (PHE) competence of 65.93 mmol g −1 h −1 driven by visible light, the highest value yielded by CIZS to date. X-ray absorption spectra of CIZS and density functional theory (DFT) calculations confirm the crucial amine N→Cu coordination after amine functionalization. The new emerging coordination via lone-pair electron donation profitably accesses the regulation of the coordination environment, electronic structures, and carrier behavior. Moreover, individual EDA molecule with two-terminal −NH 2 group serves as a molecular bridge to hybrid CIZS and NiS x cocatalyst via N→Cu and N→Ni coordination, favorably promoting efficient charge transport. This study provides advances in practical functionalizing photocatalysts.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
CELLULOSE
·
2019
·Vol. 26
·期 11
·6849-6859
·
IF 3.917
Wang Aili,Li Shuhui,Chen Hou,Hu Yanping,Peng Xiong
Abstract The adsorption of heavy metal ion Zn(II) from industrial wastewater by performing environmentally benign methods is particularly important. In this study, a novel microcrystalline cellulose-based polymeric bio-sorbent (MCC- g -polyIL), which contained specific poly(ionic liquid) structure and adsorption performance for Zn(II), was in situ ARGET ATRP-synthesized within ionic liquid microemulsions. The ionic liquid microemulsions were characterized by phase formation capacity and dynamic light scattering results, and the prepared MCC- g -polyILs were characterized by FTIR, 1 HNMR, and TG/DSC analyses. The optimization of the adsorption process indicates that both the molar ratio of double ionic liquids and the dosage of the adsorbent affected the adsorption capacity of MCC- g -polyILs toward Zn(II).
The research on adsorption kinetics and adsorption isotherms further reveals that the adsorption process follows the pseudo-second-order kinetic model and the Freundlich adsorption isotherm model. The designed MCC- g -polyILs exhibited enhanced adsorption capacity, which indicates promising practical applications for the removal of Zn(II) from industrial wastewater.
Graphic abstract
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Shi-Ming Li,Hong-Chan Jiang,Qing-Ling Ni,Liu-Cheng Gui,Xiu-Jian Wang
Ethane (C 2 H 6 ) and ethylene (C 2 H 4 ) have similar physical and chemical properties, which are critical and difficult for the separation of C 2 H 6 /C 2 H 4 mixtures in the petrochemical process. Traditional C 2 H 4 -selective adsorbents can separate the C 2 H 6 /C 2 H 4 mixtures, but need further desorption treatment to obtain pure C 2 H 4 production. On the contrary, high-pure C 2 H 4 can be prepared in one step by C 2 H 6 -selective porous material. Herein, we present a caged metal-organic framework ( GNU-2 ) based on Zn (II) clusters, which has advantageous adsorption sites and cavity pockets for the reverse capture of C 2 H 6 from C 2 H 6 /C 2 H 4 mixtures. At 298 K and 1 bar, high C 2 H 6 uptake (5.10 mmol g −1 ) and C 2 H 6 /C 2 H 4 selectivity (1.849) were attained based on the activated GNU-2 ( GNU-2a ), exceeding a number of top C 2 H 6 -selective adsorbents. Grand canonical Monte Carlo (GCMC) simulations exhibit that the appropriate chemical environment of nonpolar cage in GNU-2a allows it to continuously maintain closer van der Waals contacts between C 2 H 6 molecule, saturated Zn cluster and nonpolar pore surface through multiple C H···O hydrogen interactions and C H···π hydrogen interactions. Moreover, dynamic breakthrough studies also show that GNU-2a displays the actual separation performances of C 2 H 6 .
研究领域:
化学工程
·
材料科学
✓ 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）