APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Ruxia Song,Shihong Zhang,Yi He,Bo Liu,Hongjie Li,Zhifei Zhang,Yahui He
In this study, a novel Ni-Cu/OH-BN(h)-PA-Zn-DCD composite coatings with excellent wear resistance and corrosion resistance was developed, which may be used in the field of seawater corrosion. By the self-assembling of phytic acid, Zn 2+ and dicyandiamide to grow PA-Zn-DCD structure onto the surface of hydroxylated BN(h) nanosheets, obtained a hybrid denoted as OH-BN(h)-PA-Zn-DCD, which was doped into Ni-Cu coating by pulse electrodeposition. The results show that OH-BN(h) and OH-BN(h)-PA-Zn-DCD hybrids affect the surface morphology, roughness, microcrystals size and thickness of the composite coatings. Simultaneously, compared with NC coating and NC/HB-1.5 coating, NC/BP-1.5 coating has the highest microhardness (559.26 Hv), the lowest friction coefficient (0.172), and the best corrosion resistance (i corr is 3.551 × 10 −8 A·cm −2 , R ct is 1.098 × 10 6 Ω·cm 2 ). In addition, the EIS results of the immersed specimens showed that the NC/BP-1.5 composite coating still has good protective ability after soaking for 15 days in simulated seawater medium (R ct is 7.434 × 10 6 Ω·cm 2 ).
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Guoxian Chen,Zhiwei Hu,Huiqiang Su,Jie Zhang,Dewei Wang
Heavily heteroatoms doped carbons are highly attractive for electrochemical energy storage and electrocatalysis applications. We report herein a versatile coordination chemistry strategy for the producing of B, N co-doped carbon nanosheets (BCN-Mg) with an ultrahigh doping level (15.26 % for N, 10.18 % for O, and 3.21 % for B) though pyrolysis of nitrogen-rich Mg-based complex in the presence of boric acid . In this protocol, hexamethylenetetramine , which acts as both carbon and nitrogen source, can easily complex with magnesium ion to form a nitrogen-rich Mg-based complex in aqueous solution due to the presence of plentiful amino groups with strong complexation capability. Benefiting from the ultrahigh doping level and moderate specific surface area of 428 m 2 g −1 , the as-obtained B, N co-doped carbon nanosheets display a high specific capacity of 130.7 mA h g −1 (at 0.1 A g −1 ), and good stability of 87.3 % after 10,000 cycles when serves as the cathode for aqueous Zn-ion hybrid capacitors. More importantly, change details of the N and B containing functional groups during the charge-discharge process have been fully evaluated by ex-situ X-ray photoelectron spectroscopy characterization technique and density functional theory calculations. This work not only offers a new way to develop B, N co-doped carbon nanosheets with an ultrahigh doping level but also shed some new insight on the roles of heteroatoms containing functional groups for electrochemical energy storage applications.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICO-BIOLOGICAL INTERACTIONS
·
2023
·
IF 5.1
Jing Wang,Bin Yang,Xinping Yu,Shuji Chen,Wenxin Li,Xu Hong
Understanding the formation of protein corona (PC) is of vital importance for exploring the toxicity of nanoparticles and promoting their safe applications. In this study, CdTe QDs doping with 0, 1%, 5% and 10% Zn were synthesized using one-pot hydrothermal methods . Afterwards, this study explored and compared the formation of pure and Zn doped-QDs PC as well as the subsequent molecular and cellular toxicity. Result found that Zn doping regulated the toxicity of Cd-QDs by controlling their ability to adsorb serum proteins . The adsorption to Cd-QDs induced the dispersion, unfolding, secondary structural changes and the activity loss of bovine serum albumin (BSA). Among the synthesized Cd-QDs, 10%Zn-QDs exhibited the highest fluorescence quantum yield and lowest molecular toxicity. The formations of pure QDs and 10%Zn-QDs with BSA corona are majorly driven by different forces with different patterns. The regulation of BSA on the cytotoxicity differences of pure QDs and 10%Zn-QDs was similar with fetal bovine serum, proving the significant contribution of BSA to the cytotoxicity of Cd-QDs PC. Compared with pure QDs PC, the higher cytotoxicity and oxidative stress level of 10%Zn-QDs PC were correlated with higher intracellular [Cd 2+ ]. Both larger amount of BSA adsorption and higher level of intracellular reactive oxygen species could accelerate the dissolution rates of 10%Zn-QDs and thus result in higher intracellular [Cd 2+ ].
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2023
·
IF 22.1
Xi Li,Shiwen Wang,Pei Chen,Baokang Xu,Xiao Zhang,Yanhua Xu,Ru Zhou,Yang Yu,Huaili Zheng,Peng Yu,Yongjun Sun
Co–Zn–N–C catalyst (MCZC) with neighboring Co and Zn pairs anchored on hollow carbon nitride was constructed by the direct etching of zeolitic imidazolate frameworks assembled with Co and Zn. Adequate characterizations and density functional theory (DFT) studies confirmed the successful construction of non-bonding Co and Zn pairs with enhanced electron transfer on Co sites by adjacent Zn sites. Based on the synergy of adjacent Co and Zn atom pairs, the MCZC/Perxymosulfate (PMS) system achieved 99.6% Tetracycline (TC) degradation in 24 min with a mineralization rate of 55.8% and PMS decomposition efficiency of 73.1%. DFT calculation based on the Fukui index identified the sites susceptible to attack by the active species. TC degradation pathways could be inferred, and reduced toxicity of intermediates was observed. This work provides new insights into the design of MOF-derived bimetallic catalysts and the importance of the interaction between adjacent metal active sites to catalytic performance.
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Lili Bo,Fang Nian,Lumei Pu,Ping Li,Yusen Hu,Jinhui Tong
Hybrids of α-Fe 2 O 3 /Fe 3 O 4 nanoparticles embedded in N doped graphitic carbon polyhedron layered arrays (FeO x /NCLA) were simply constructed by pyrolyzing the composite precursor of NH 2 -MIL-101(Fe) (a metal organic framework, MOF) and glycylglycine. The experimental and calculated results reveal that the obtained catalysts exhibited multiple active components, synergistic heterojunction effect, high BET surface areas and conductivity, and consequently greatly improved intrinsic electrocatalytic activities and kinetics for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). As the results, the optimized catalyst FeO x /NCLA-1.2 exhibited positive half-wave potential of 0.846 V for ORR and only 218 mV of overpotential (at 10 mA/cm 2 ) for OER in alkaline electrolyte, which is superior than Pt/C (20 %) and RuO 2 , respectively. The Zn-air battery (ZAB) employing the FeO x /NCLA-1.2 as electrocatalyst obtained a peak power density of 104.3 mW·cm −2 , a specific capacity of 840 mAh·g Zn -1 and an energy density of 890 Wh·kg Zn -1 , which is also much higher than that for the noble metal based one. The catalyst is promised to be applied in water electrolysis, fuel cells and metal-air batteries.
✓ 已验证
产品关联
DOI
高影响因子
CHINESE CHEMICAL LETTERS
·
2023
·
IF 9.1
Fengxian Zhang,Xupo Liu,Ye Chen,Miao Tian,Tianfang Yang,Jing Zhang,Shuyan Gao
Fe-N X /C electrocatalysts have aroused extensive interest in accelerating sluggish oxygen reduction reaction (ORR) kinetics as potential alternatives to platinum catalysts in rechargeable Zn-air batteries (ZABs). However, the low density and poor accessibility of Fe-N X sites have severely restricted the electrocatalytic performance of Fe-N X /C. Herein, Fe, N co-doped ordered mesoporous carbon fiber bundles are prepared through a ligand-assisted strategy with nitrogen-rich 1,10-phenanthroline as space isolation agent. 1,10-Phenanthroline reveals a six-membered heterocyclic structure containing abundant nitrogen species to tightly coordinate with Fe ions , which is conducive to achieving high-density Fe-N X sites. Meanwhile, the adoption of SBA-15 as hard-templates enables the catalysts with highly ordered channels and large specific surface areas, improving the accessibility of Fe-N X sites. The optimal catalyst (PDA-Fe-900) demonstrates a positive half-wave potential of 0.84 V ( vs. RHE) in alkaline solution, outperforming the commercial Pt/C (0.83 V). In addition, PDA-Fe-900 delivers comparable ORR performance to commercial Pt/C in acidic electrolyte. Impressively, when PDA-Fe-900 is employed as an air cathode, it achieves large power densities of 163.0 mW/cm 2 in liquid-state ZAB and 116.6 mW/cm 2 in the flexible solid-state ZAB. This work provides an efficient ligand-assisted pathway for fabricating catalysts with dense and accessible Fe-N X sites as high-performance ORR electrocatalysts for ZABs.
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2022
·
IF 9.221
Bingsheng Du,Fanfan Yan,Xiaohui Lin,Chengyao Liang,Xuezheng Guo,Yiling Tan,Hao Zhen,Chengjiu Zhao,Yijie Shi,Evans Kibet,Yong He,Xi Yang
Two-dimensional metal-organic framework nanosheets , as a new member of the two-dimensional family, are attracting increasing research interest in various fields. Herein, a uniform two-dimensional Zn-BTC MOF nanosheet with a thickness of 14 ± 2 nm was synthesized through a simple, efficient, and scalable sonication-assisted bottom-up strategy. The ZnO nanoparticles were used as the Zn source, which can be corroded by H 3 BTC to form Zn-BTC MOFs under sonication conditions. The morphologies of Zn-BTC MOFs can be modulated from nanosheets to nanorods by changing the content of H 3 BTC. The crystal growth process is dominated by the thermodynamics of sonication and the stoichiometric ratio of the generated Zn 2+ and H 3 BTC, and the crystal growth mechanism was elaborated by the oriented attachment. Consequently, a chemiresistive gas sensor based on Zn-BTC nanosheet derivatives was fabricated to detect ppb-level acetone . Notably, the experimental detection limit of concentration could reach as low as 100 ppb of acetone due to the functional surface, and the dynamic response linearity reached 99 %. Our work explored a new method of synthesizing two-dimensional Zn-BTC MOF, and the fabricated gas sensing device demonstrated promising potential in gas sensing fields.
✓ 已验证
产品关联
DOI
高影响因子
Frontiers in Chemistry
·
2022
·
IF 5.545
Zang Shuaipu,Zhang Xuhui,Sun Yingying,Li Ning,Wang Lei,Li Lin Song
Harnessing environment-friendly and low-cost multinary Cu-In-Zn-S quantum dots (QDs) as emitters for light-emitting diodes (LEDs) has attracted great attention for display and lighting application. However, suboptimal QD structure is a huge obstacle, which results in serious non-radiative recombination and efficiency roll-off. Herein, we synthesized structure-tailored Cu-In-Zn-S/ZnS//ZnS QDs by improving the reactivity of shell growth by 2-ethylhexanoic acid (EHA) ligands. The EHA-assisted shell growth can boost an extended alloyed layer at the core-shell interface and a smoothed confinement barrier, which effectively passivate the interface defects and suppress Förster resonance energy transfer (FRET) process. These synthesized QDs display a bright photoluminescence emission (quantum yield of 83%) and a larger size of 8.4 nm. Moreover, the resulting LEDs based on the EHA-assisted QDs exhibit a maximum luminance of 8074 cd/m2, and a current efficiency of 7.3 cd/A with a low efficiency roll-off. Our results highlight a remarkable ligand strategy to tailor the QD structure for high performance QD-based LEDs.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Bingbing Cui,Chuanpan Guo,Zhihong Zhang,Guodong Fu
Photochromic hydrogels, which are dynamic in response to external light stimuli, have aroused increasing attentions due to their potential applications in intelligent devices. However, achieving excellent photochromic activity with fast photoresponse and self-bleaching rates still remains a huge challenge. Herein, a novel photochromic junction of zinc-based metal–organic framework (Zn-MOF) and tungsten oxide (WO 3 ) was established as photochromic unit and embraced within hydrogel of poly(acrylic acid- co -polyethylene glycol) [P(AA/PEG)] via the interaction of ionic and hydrogen bonding (denoted as P(AA/PEG)-Zn-MOF@WO 3 ), following by exploiting as self-bleaching photochromic agent for assembling UV-irradiated smart rewritable device. The photoinduced electrons can be efficiently separated and migrated from Zn-MOF to WO 3 in the Zn-MOF@WO 3 junction after UV irradiation, thereby increasing the coloration degree. Due to the enhanced fast response to light stimuli, the P(AA/PEG)-Zn-MOF@WO 3 -3 hydrogel prepared using 200 mg Zn-MOF demonstrated the fast responsive photochromic behavior of 10 s under UV lamp illumination and the self-fading process could be easily performed in room condition (within 20 min). Moreover, the coloration degree of P(AA/PEG)-Zn-MOF@WO 3 -3 photochromic hydrogel was precisely controlled and repeated by changing the UV irradiation time. Consequently, the fast photochromic and self-fading properties of P(AA/PEG)-Zn-MOF@WO 3 -3 afforded rapid and easy ‘‘writing’’ and “erasing” abilities. The present work proposes a new way for the construction of the reversibly responsive photochromic hydrogel with smart optical materials, further broadening their applications in intelligence sensors, smart windows, and flexible memory devices.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Fei Long,Qixiang Zhang,Junjie Shi,Li Wen,Yonghui Wu,Ziqi Ren,Zunyu Liu,Yixin Hou,Ke Mao,Ke Niu,Nishuang Liu,Zhi Zhang,Luying Li,Jun Su,Fei Long,Yihua Gao
Aqueous zinc-ion batteries (AZIBs) are a green, low-cost and high-safety energy storage technology. Although MoS 2 is a promising electrode material, low conductivity and poor stability still limit their application in AZIBs. Constructing conductive heterostructures is an effective strategy to overcome these problems. Herein, metallic 1 T-MoS 2 nanosheets are innovatively combined with conductive Ti 3 C 2 MXene, resulting in enlarged 1 T-MoS 2 interlayers (from 9.5 to 9.9 Å) and enhanced hydrophilicity. This novel 1 T-MoS 2 /Ti 3 C 2 MXene heterostructure exhibits exceptional high-rate capability (284.3 mAh/g at 0.10 A/g with 105.2 mAh/g at 10.00 A/g) and long-term cycling stability (93.2 % capacity retention after 3000 cycles). High capacity comes from the expanded ion storage space caused by the extended layer spacing of the metallic 1 T-MoS 2 . Outstanding rate capability thanks to ultrafast electrons and ions transport from Ti 3 C 2 MXene. Prominent long-term cycling stability is attributed to the efficient synergistic effect of 1 T-MoS 2 and Ti 3 C 2 MXene in the 3D interconnected networks. As a proof of concept, the wearable quasi-solid-state Zn-ion battery employing the 1 T-MoS 2 /Ti 3 C 2 MXene cathode exhibits stable electrochemical performance under different bending conditions. This work explores a new route to design high-performance layered cathode materials for AZIBs.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Zhen-Peng Cui,Le-Xi Zhang,Heng Xu,Yan-Yan Yin,Bo Tang,Li-Jian Bie
Metal-organic frameworks (MOFs) have been proved to be outstanding candidates for humidity sensors, however, pure MOFs are still limited in hysteresis, integration, and intelligence. In this investigation, inspired by a single-site-ion strategy for catalysis, UiO-66-NH 2 is first grafted by 2, 6-DPA (2, 6-dipicolinic acid) molecules (named as U-DPA) and then combined by Zn (II) ions (noted as U-DPA-Zn). Taking advantage of electrolyte and MOF, U-DPA-Zn exhibits significantly enhanced humidity sensing performance than UiO-66-NH 2 and U-DPA. U-DPA-Zn possesses the highest sensitivity (S r = 8.07 × 10 3 ), the best linearity (R 2 = 0.994), the shortest response-recovery time (τ res = 2 s, τ rec = 105 s), the smallest hysteresis (ΔH = 1.81%), as well as good repeatability in a wide relative humidity (RH) range (11%-97%). Thanks to its excellent properties, U-DPA-Zn shows great potential in the field of monitoring human respiration (breath detection) and water evaporation on human skin (finger detection). Additionally, the humidity sensing mechanism is discussed based on complex impedance analysis, revealing the single Zn (II) make giant contribution to MOFs. This work provides an optional material for humidity sensors and further a new strategy to improve the humidity sensitivity of pure MOFs.
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2022
·Vol. 15
·期 7
·2672
·
IF 3.748
Lifang Song,Huiwen Huo,Wenshuo Zhang,Huiyun Xia,Yanhui Niu
In order to improve the initial color and the long-term heat stability of super-transparent polyvinyl chloride (PVC), a series of composite heat stabilizers consisting of unsaturated Zn oleate and uracil derivatives have been designed in this paper. The uracil derivatives are 1,3-dimethyl-6-amino-uracil (DAU) and 6,6′-diamino-1,1′,3,3′-tetramethyl-5,5′-(ethylidene)bisuracil (OSU). The static thermal stability, dynamic thermal stability, and transparency were used to evaluate the properties of the stabilized transparent PVC sheets. The results indicate that the compatibility between the stabilizer and PVC was greatly enhanced by introducing an unsaturated long-chain Zn oleate and a long alkyl chain bisuracil derivative. Through the thermal discoloration test, the best ratio of DAU/zinc oleate (DAU/Zn) and OSU/zinc oleate (OSU/Zn) was determined to be 4:1, with a total amount of 3 phr in 100 phr PVC. It was verified that the combination of zinc oleate with uracil derivatives could improve the long-term thermal stability of PVC, and the DAU/Zn was better than that of the OSU/Zn. In addition, through the transmission/haze verification, adding a proper amount of epoxidized soybean oil (ESBO) and phosphite ester to the OSU/Zn system has a certain synergistic effect. The thermal stability and transparency of PVC can be remarkably enhanced.Keywords:polyvinyl chloride;highly transparency;zinc oleate;uracil derivatives;thermal stability
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）