TALANTA
·
2022
·
IF 6.556
Mingxing Liu,Rongrong Jiang,Meie Zheng,Mengjiao Li,Qingjie Yu,Hongda Zhu,Huiling Guo,Hongmei Sun
A sensitive unlabeled ratiometric biosensor was developed to the detection of cardiac troponin I (cTnI). This biosensor was established by using the glassy carbon electrode coated with graphene oxide to form a platform bonded with N, Zn co-doped graphene quantum dots (N, Zn-GQDs). The N, Zn-GQDs was successfully prepared as the raw materials of graphite powder and characterized. Antibodies of cTnI were bonded to the surface of N, Zn-GQDs as the nanoprobe by amide bonds. The signals of electrochemiluminescence (ECL) and differential pulse voltammetry (DPV) were exposed to decrease in the presence of cTnI, which caused the signal substance to move farther away from the electrode. It was found that the immune complex layer attenuated the intensity of ECL and DPV which could be used as the good overall signal for determining concentration of cTnI. The ratiometric biosensor had a good response to cTnI with the detection limit is 4.59 pg L −1 in the concentration range of 10–10 6 pg L −1 . The developed method was evaluated for the detection of cTnI in human serum, and the obtained results were consistent compared to the reference values obtained by hospital standard enzyme linked immunoassay (ELISA) with 9.09%–11.1% of RSD. Our findings suggested that this ratiometric biosensor could be used to the detection of cTnI in human serum with lower cost and higher sensitivity, it also might be better potential application prospect based on N, Zn-GQDs to detect other biomarkers.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Energy Technology
·
2022
·Vol. 10
·期 5
·2200057
·
IF 4.149
Yuebing Wang,Ruowei Yi,Aling Chen,Can Fang,Yaping Wang,Qingfeng Yi,Meiyang Liu,Shijie Liu,Shaoqi Zhan,Bin Zhong
Herein, we synthesize Fe-based nanocatalysts supported on the composites composed of hollow carbon spheres (HCSs) and metal–organic frameworks (MOFs) by a facile pyrolysis method. The composites with different ratios of HCSs and MOFs present an interesting phenomenon: the oxygen reduction reaction (ORR) limiting current increases along with the HCSs content, while the onset potential and half-wave potential show the highest values when the ratio between HCSs and MOFs is optimized. The composite catalysts exhibit superior ORR electrocatalytic performance than Pt/C in alkaline and neutral media. Even in the acidic media, these composite catalysts still present a close catalytic activity to Pt/C. For the oxygen evolution reaction (OER) test, the prepared Fe-NC@NHCS-600 shows a reduced overpotential to that of the benchmark IrO 2 . The rechargeable Zn-air battery using Fe-NC@NHCS-600 as the catalyst of air electrode exhibits superior discharge capability with an open-circuit voltage of 1.620 V and a maximum power density of 278.97 mW cm −2 in alkaline electrolyte, as well as an open-circuit voltage of 1.457 V and a maximum power density of 114.96 mW cm −2 in neutral electrolyte. The battery also exhibits steady cycling stability for more than 90 and 70 h at 5 and 10 mA cm −2 , respectively.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2022
·
IF 6.959
Tuo Xin,Yiran Wang,Qiuju Xu,Jiaxiang Shang,Xiangcheng Yuan,Weixing Song,Jinzhang Liu
Rechargeable aqueous zinc-ion batteries (ZIBs) hold great promise for future applications in large-scale energy storage systems. However, the rampant dendrite growth and undesired hydrogen gas evolution over the Zn anode are key issues that make the current ZIB technology immature. Herein, we demonstrate the use of a zeolitic imidazolate framework (ZIF)-derived composite coating on Zn foil for simultaneously suppressing the dendrite growth and H2 evolution when operated in ZnSO4 electrolytes. The polyhedral ZIF-8 granules are converted into mesoporous N-doped carbon (NC) decorated with ZnS nanoparticles, and this ZnS/NC composite is coated onto Zn foil. For comparison, bare Zn anodes and Zn foils coated with other ZIF-derived materials including ZnS nanocrystals and NC frameworks are also used to make half or full cells. The Zn@ZnS/NC anode shows the best performance in terms of superb cycling stability, suppressed dendrite growth, and reduced H2 evolution. At the interface between ZnS/NC coating and Zn foil, confined parasitic reactions result in a layer of an amorphous ZnO nanosheet network, which has a positive effect on reducing water activity. The role of this amorphous ZnO byproduct in reducing H2 evolution is discussed in detail. This work sheds light on a strategy for making practical ZIBs.
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 29
·期 26
·40041-40052
·
IF 5.19
Luo Qin,Huang Xiaofeng,Deng Qiulin,Zhao Xueyuan,Liao Huiwei,Deng Hongquan,Dong Faqin,Zhang Tao,Shi Lianjun,Jiang Jinlong
The photocatalytic properties of Zn/Co zeolite imidazolate frameworks (ZIF-ZnCo) prepared by various Zn/Co ratio are of significantly diversity due to the morphology structure of the ZIF-ZnCo. Thereinto, the prepared ZIF-ZnCO-8:1 is excellent capability by virtue of its 3D cross-shaped structure. Spectral test results show that as-prepared novel 3D cross-shaped ZIF-ZnCo has a lower recombination rate of electron and hole pairs than the lamellar and dodecahedral, thus improving the photocatalytic ability. The photocatalytic ability of 3D cross-shaped ZIF-ZnCo was carefully investigated for removing mixed solution of Congo Red (CR) and Cr(VI). The photocatalytic reduction ability of 3D cross-shaped ZIF-ZnCo was 22% higher than ZIF-8 for Cr(VI). Meanwhile, CR was altogether removed at dark processing and Cr(VI) was removed 70% after dark processing 120 min and photocatalytic 240 min. Therefore, the high adsorption and photocatalytic capacity denote the potential application of 3D cross-shaped ZIF-ZnCo. Graphical abstract
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Catalysis
·
2022
·
IF 13.7
Yuting He,Xiaoxuan Yang,Yunsong Li,Liting Liu,Shengwu Guo,Chengyong Shu,Feng Liu,Yongning Liu,Qiang Tan,Gang Wu
Single-metal site catalysts have exhibited highly efficient electrocatalytic properties due to their unique coordination environments and adjustable local structures for reactant adsorption and electron transfer. They have been widely studied for many electrochemical reactions, including oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). However, it remains a significant challenge to realize high-efficiency bifunctional catalysis (ORR/OER) with single-metal-type active sites. Herein, we report atomically dispersed Fe–Co dual metal sites (FeCo–NC) derived from Fe and Co co-doped zeolitic imidazolate frameworks (ZIF-8s), aiming to build up multiple active sites for bifunctional ORR/OER catalysts. The atomically dispersed FeCo–NC catalyst shows excellent bifunctional catalytic activity in alkaline media for the ORR (E1/2 = 0.877 V) and the OER (Ej=10 = 1.579 V). Moreover, its outstanding stability during the ORR and the OER is comparable to noble-metal catalysts (Pt/C and RuO2). The atomic dispersion state, coordination structure, and the charge density difference of the dual metal site FeCo–NC were characterized and determined using advanced physical characterization and density functional theory (DFT) calculations. The FeCo–N6 moieties are likely the main active sites simultaneously for the ORR and the OER with improved performance relative to the traditional single Fe and Co site catalysts. We further incorporated the FeCo–NC catalyst into an air electrode for fabricating rechargeable and flexible Zn–air batteries, generating a superior power density (372 mW cm–2) and long-cycle (over 190 h) stability. This work would provide a method to design and synthesize atomically dispersed multi-metal site catalysts for advanced electrocatalysis.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Deyu Wang,Yongfu Kang,Lei Lei,Yoann de Rancourt de Mimérand,Xiaoyun Jin,Jia Guo
In this study, we explore the potential of an innovative method based on cold plasma discharge (CPD), to fabricate stable supported photocatalysts for the photodegradation of organic water pollutants. Supported catalysts bear significant advantages compared to colloidal ones, the main benefit being that they can be separated from water and reused much more easily, which is a crucial aspect especially of nanocompounds. They can also participate in reducing catalyst loss between operations or even enable continuous-flow processes, usually more productive than batch, discontinued operations. Hereby, we describe an immobilization approach, i.e. in situ complexation-assisted precipitation (ISCAP), which allows the fabrication of nanoCdS photocatalyst, directly at the surface of a polymer substrate. More specifically, we establish the potential of this process to obtain a hybrid coating of zinc-doped CdS, in situ . Our findings revealed that the resulting supported catalyst was photoactive – degrading Rhodamine B (RhB) dye, easily recyclable and photostable thanks to the successful doping of the catalytic phase. In addition, it seems that the immobilization itself stabilized the catalyst, probably thanks to polyvinylphosphonic acid (PVPA), used as a complexing and binding agent. The catalytic phase was immobilized on a resin substrate that was fabricated by liquid crystal diode (LCD) 3D printing, and conceived using fractal-inspired geometry.
✓ 已验证
产品关联
DOI
高影响因子
Materials Chemistry Frontiers
·
2021
·Vol. 6
·期 1
·78-85
·
IF 6.482
Yanhui Sun,Zongge Li,Yinglong Wu,Jinrui Tian,Yaqun Wang,Miaosen Yang,Guoxin Zhang
The high-cost synthesis of highly dispersed non-noble metal–nitrogen–carbon (MNC) electrocatalysts hinders their practical applications. Here, we have developed a cost/time-efficient synthesis method for MNC electrocatalysts with highly dispersed metal sites, using the commercially available cheap ZnO as the Zn source, reducing the cost of Zn usage by over 80%. Our specially chosen solvent formamide can react with ZnO and allow the formation of nano-sized ZnFeCo–Nx complexes uniformly distributed in the formamide-derived high-N-doped carbon substrate. Further annealing the ZnFeCo–N–C precursor will produce a highly dispersed FeCo–NC target product. Electrochemical measurements show that the prepared FeCo–NC is an excellent electrocatalyst for alkaline oxygen reduction reaction (ORR), rendering superior onset and half-wave potentials of 1.05 and 0.92 V, respectively. The Al–air battery assembled using this also shows a high specific power (204.9 mW cm−2) and a large specific capacity (552 mA h g−1 at 10 mA cm−2), exceeding those of the 20 wt% Pt/C catalyst. Our method may inspire the scalable and low-cost production of highly dispersed MNC electrocatalysts and their wide range of practical applications.
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2021
·
IF 6.609
Tao Pan,Sida Ge,Mengnan Yu,Yana Ju,Ran Zhang,Pei Wu,Kuanyu Zhou,Zhijie Wu
Zn modified ZSM-5 zeolite supported Ni bifunctional catalysts were prepared by in-situ hydrothermal synthesis (Zn-Ni-ZSM-5), co-impregnation method (Zn-Ni/ZSM-5) as well as combining in-situ hydrothermal synthesis of Zn-ZSM-5 and sequential impregnation of Ni (Ni/Zn-ZSM-5) and used for the selective converting olefin to aromatics applicable for FCC gasoline hydro-upgrading. The Lewis (L) acid sites generated by ZnOH + species and hydrogenation active sites from Ni 0 species were varied with preparation method, in which their locations at the external surface or micropores of zeolite changed the acid properties of catalysts. Comparing to the Zn-Ni/ZSM-5 from the co-impregnation method, direct in-situ hydrothermal method could incorporate Zn and Ni species within zeolite, which makes the strong interaction between the metal species and the framework Al to form medium-strong L acids (ZnOH + /NiOH + ). This leads to the decrease of ratio of Brønsted acid sites to L acid sites (B/L) from 0.40 to 0.12 and the difficulty in reducing of Ni cations to Ni 0 from 57% to 30% Ni 0 percent. Ni/Zn-ZSM-5 sample prepared by incorporating Zn species into micropores and sequential depositing Ni species at the external surface of zeolite possesses a low B/L ratio similar to Zn-Ni-ZSM-5 (0.20 versus 0.12) but a much higher Ni 0 percent (52% versus 30%). Zn-Ni-ZSM-5 shows closer intimacy between Zn and Ni species comparing to Zn-Ni/ZSM-5 and Ni/Zn-ZSM-5. For the 1-hexene aromatization, the formed iso -alkene at acid sites was quickly saturated to iso -alkanes by the adjacent Ni 0 particles over Ni-Zn-ZSM-5 catalyst in hydrogen steam. However, the location of aromatization active sites (ZnOH + , L acid sites) in micropores and hydrogenation active sites (Ni 0 species) on external surface of Ni/Zn-ZSM-5 makes the tandem conversion of n-alkene → iso -alkene → aromatics, rather than the n-alkene → iso -alkene → iso -alkane. Thus, Zn-Ni-ZSM-5 with close intimacy of ZnOH + and Ni 0 particles shows a high iso -alkane selectivity (27.9% iC 4 + ), while Ni/Zn-ZSM-5 exhibits a high aromatics selectivity (39.6 %) in the conversion of 1-hexene in hydrogen steam. Similar results have also found in the conversion of n-heptane. Here, the control of the intimacy of Zn and Ni in ZSM-5 zeolites has been realized to be a good protocol to adjust the selective conversion of olefins/alkanes to aromatics versus iso -alkanes.
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 46
·期 4
·1704-1712
·
IF 3.591
Xiu-Jie Yang,Lunan Wu,Ruona Hu,Junqi Xing,Guohao Zhou,Shufen Lu,Jun Wu,Peng Li,Dong Liu
In this paper, hollow Bi2MoO6 microspheres (h-Bi2MoO6) were prepared via a simple solvothermal method. Then, h-Bi2MoO6/(Zn/Ti)LDH composite photocatalysts were prepared through the in situ growth of a Zn–Ti layered double hydroxide ((Zn/Ti)LDH), owing to electrostatic interactions of opposite electrical charges. The obtained h-Bi2MoO6/(Zn/Ti)LDH composites were characterized using X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy, N2 adsorption–desorption Brunauer–Emmett–Teller (BET) analysis, scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), UV-Vis diffuse reflectance spectroscopy (UV-Vis DRS), and fluorescence spectroscopy. The (Zn/Ti)LDH nanosheets enhanced the charge separation efficiency and expanded the light absorption region by constructing a heterojunction structure. As a result, h-Bi2MoO6/(Zn/Ti)LDH-2% exhibited the highest photocatalytic degradation rate which is 6.8 times that of h-Bi2MoO6. Based on the active species trapping experiment results, it can be speculated that photogenerated holes (h+) and hydroxyl radicals (˙OH) play major roles in the photocatalytic degradation of rhodamine B. What's more, the h-Bi2MoO6/(Zn/Ti)LDH composite photocatalyst exhibited excellent stability and recyclability, revealing remarkable potential for organic wastewater treatment.
✓ 已验证
产品关联
DOI
高影响因子
Molecular Catalysis
·
2021
·
IF 5.062
Huayan Zheng,Nilesh Narkhede,Guoqiang Zhang,Huacheng Zhang,Lina Ma,Shirui Yu
The small amount of promoter has shown increase in the methanol formation rate by several folds. Hence, hydrotalcite having sufficient trivalent cations are preferred; however, traditional coprecipitation route often leads to poor Cu dispersion owing to higher cationic charge in the layered structure that result in aggregation of the sheets. The present paper reports synthesis of porous, nanostructured Cu/ZnO/Ga 2 O 3 catalysts from pure phase hydrotalcite precursors by using aqueous miscible organic solvent treatment method. The 20% Ga containing catalyst showed ca. 2.5-fold increase in both surface area and % dispersion of the exposed Cu as compared to that prepared from standard coprecipitation method with similar composition. The stabilization induced by mutual dispersion of Cu, Zn and Ga components in the exfoliated sheets resulted in confinement of the Cu particle size up to 5 nm in the spent catalyst. The best performing catalyst of the series, Cu 0.4 Zn 0.4 Ga 0.2 -LDO exhibited STY of 762 mg•g Cat −1 •h −1 for methanol formation from syngas which was decreased by only 8.6% during 50 h of the reaction on stream. Further, it was revealed that, Ga is more conductive to stabilization of Cu as compared to Al, resulting in 23% higher methanol formation rate as compared to the Al containing catalyst.
✓ 已验证
产品关联
DOI
高影响因子
Surfaces and Interfaces
·
2023
·
IF 6.2
Huan Yao,Wenju Dong,Xu Ji,Shuang Cheng
In acidic environment, electrolytic Zn//MnO 2 batteries possess high potential to reach high energy density on the promise of high safety, low cost, and high power density. However, several serious challenges still need to be overcome, mainly including suitable current collector that can be stable in strong acidic and oxidizing environment, optimal cathode that can promote massive and uniform deposition of the MnO 2 , and Zn-plating efficiency and corrosion resistance improvement. Herein, a free-standing and binder-free film composed of graphene powder (GP) and MnSO 4 (GP/MS-F) was developed and used as initial cathode frame. The film with a GP: MnSO 4 mass ratio of 2:3 and a total areal mass of 13 mg cm −2 exhibits good conductivity and considerable flexibility without the using of any other additives. Matched with C coated ZnO (ZnO@C) modified anode frame and Carboxy Methyl Cellulose Sodium gelled acidic electrolyte, the film can deliver a high areal capacity of 1.4 mAh cm −2 , corresponding to a specific capacity of 184 mAh g −1 based on the total mass of initial GP and deposited MnO 2 (∼7.6 mg). At 5 mA cm −2 , a high Coulombic efficiency of 92 % can be achieved and maintained for 2,100 cycles. At 30 mA cm −2 , the cell can work well for 8,000 cycles. Meanwhile, discharge voltage of the cell can reach 1.9 V, exhibiting high practical application prospect.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Lei Hu,Liwen Bo,Nengze Wang,Mengxuan Sun,Xiaohe Ren,Zhijie Li,Chunyang Jia
For most consumer electronics, the volumetric performance of energy storage devices is usually more significant than traditional gravimetric performance. Zinc-ion capacitors (ZICs) are regarded as one of the most promising energy storage devices with high energy and power density. However, the low volumetric performance of the cathode is a serious problem that hinders its practical application. Herein, in this work, a compact freestanding graphene film was designed by tuning the interlayer structure of flame reduced graphene oxide sheets (FRGO) using graphene oxides (GO) via a self-assembly strategy. When the mass ratio of FRGO and GO is 75%:25%, the optimum of graphene film between density and electrochemical performance was achieved. The graphene film owns a bulk density of 0.82 g cm −3 and precisely regulated abundant mesoporous around 3.8 nm, which provides more active sites for ion storage. Profiting from the pseudocapacitance reaction between C=O and Zn 2+ , the compact graphene film with a thickness of 35 μm as ZICs cathode can deliver a high volumetric energy density of 113.1 Wh L -1 and outstanding gravimetric performance of 118.7 Wh kg −1 with a bulk density of 0.95 g cm −3 , achieving the balance of the gravimetric and volumetric characteristics. The ZIC also presents a maximum volumetric power density of 21.2 kW L -1 at 7.9 Wh L -1 and 96.4% capacity retention after 8000 cycles, revealing excellent compact energy storage and cyclability. Moreover, the soft-package ZIC devices present admirable scalability, further exposing the application potential of the compact graphene film in the ZIC field.
✓ 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）