CHEMOSPHERE
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2023
·
IF 8.8
Yansong Ma,Biao Ma,Di Wu,Jun Wang,Yang Li,Xiaobin Fan,Qing Xia,Fengbao Zhang,Wenchao Peng
Perovskite materials are reported to be effective in peroxymonosulfate (PMS) based Fenton-like reactions, the leaching rates of chalcogenide materials in perovskite materials are however serious, thus leading to bad performance in long-term stability. In this study, an O-doped MoS 2 is synthesized to composite with LaCoO 3 , and the high catalytic activity of LaCoO 3 is well preserved with greatly decreased Co leaching. During the BPA degradation with PMS as oxidant, ∼100% degradation can be achieved in 20 min and this degradation efficiency can be maintained for ∼45 h in a simulated fixed bed reactor, which is almost 3 times longer than the pure LaCoO 3 . With the compositing of O-doped MoS 2 , the leached Co was greatly decreased and the dominated reactive oxidation species (ROS) transformed from SO 4 •– into O 2 •– with longer lifespan, thus resulting in the better stability. This study could promote the application of perovskite materials in the real industrial wastewater treatment .
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高影响因子
MICROCHIMICA ACTA
·
2023
·Vol. 190
·期 4
·1-9
·
IF 5.7
Tu Xinman,Deng Lamei,Ren Boyuan,Xu Zihan,Zhang Li
A conventional colorimetric method based on CuS-catalyzed H 2 O 2 is improved by a dual-modification strategy and employed for thioglycolic acid (TGA) determination. The doping of Co(II) can enhance ion exchange efficiency. Meanwhile, the modification of g-C 3 N 4 can increase specific surface area and decrease unspecific aggregation. The constructed g-C 3 N 4 /Co-CuS nanocomposite exhibited a favorable catalytic feature. A Michaelis constant (K m ) value of 0.02 mM has been achieved, which is 1/160 of those of CuS and horseradish peroxidase (HRP). The g-C 3 N 4 /Co-CuS displays a rapid color response in 3 min and resulted in a stable measurable signal within 10 min. In the determination procedure, the sulfhydryl contained in TGA is capable of preventing TMB oxidation via competing the · OH produced by catalysis and caused a color distinction that is related to the TGA amount. The distinctions of absorbance (λ max = 652 nm) of different concentrations of TGA are recorded. Linearity is obtained in the ranges of 2.5 – 20 µM and 20 – 160 µM, and the LOD is 0.14 µM. In the real sample assays of perm agent and Qianhu lake water, the recoveries were 96.70 – 106.84% and 100.21 – 101.90%, respectively. This demonstrates that the proposed dual-modification strategy for CuS contributes to highly efficient and convenient determination of TGA in daily cosmetics and water analysis. Graphical Abstract
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JOURNAL OF ALLOYS AND COMPOUNDS
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2023
·
IF 6.2
Fangfang Liu,Jinan Niu,Xiuyun Chuan,Yupeng Zhao
At present, the designs of carbon nanomaterials are indispensable to fulfill the growing demand for high energy and power density of energy storage devices. Heteroatom-doped (such as B, N, O, P, S, etc) porous carbon has great potential in the application of supercapacitor (SC) electrode materials. Nitrogen-doped carbon (N-C) has displayed superior properties in SC applications, which has attracted the attention of researchers. Due to the synergistic effect between N and S atoms, the nitrogen and sulfur co-doped carbon (N/S-C) shows superior electrochemical properties compared to the nitrogen single-doped porous carbon. Therefore, the development of N/S-C as SC electrode is of great importance. In recent years, the literature on the study of N-C for SC applications has been very extensive, however, there are a limited number of review articles on N/S-C. This manuscript represents future research directions, recent developments in the preparation of N/S-C and its application in SC. Herein, the preparation and dimension structure of N/S-C were summarized. Finally, the electrochemical properties including specific capacitance (C F ), energy density (ED) and power density (PD) are critically reviewed when these N/S-C are used as SC electrodes.
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Qingqing Zhou,Yong Liu,Lin Wang,Kun Wang,Haodong Chen,Hailing Zheng,Yang Zhou,Zhiwen Hu,Zhiqin Peng,Junmin Wan,Bing Wang
Developing an effective analytical method for microtrace detection of ancient silk is highly desirable and vitally crucial for exploring the origin and spread of silk. Herein, a taxonomically specific anti-fibroin monoclonal antibody was prepared and an elaborate visible/near-infrared (vis/NIR) photoelectrochemical (PEC) immunosensor was proposed. The sensor employed Ag 2 S nanoparticles (NPs) grown in situ on ZnO nanowire array-MXene nanocomposites (ZnO-MX) via a sonochemical method as a photosensitive material. The experimental results illustrated that the ZnO-MX/Ag 2 S-based sensor presented 6.8 times larger PEC responses than a ZnO-MX-based sensor under visible light illumination, and the PEC signal of the ZnO-MX/Ag 2 S nanocomposites was 30 times as high as that of ZnO-MX under 808 nm NIR light, indicating enhanced photoelectric activity and a matched energy band structure of ZnO with MXene and Ag 2 S. This PEC immunosensor exhibited excellent potential for the ultrasensitive detection of Bombyx mori silk traces due to its wide linear range of 0.005–50 ng mL −1 and low detection limit of 1.51 pg mL −1 . Additionally, the immunosensor showed outstanding specificity, stability, and repeatability, particularly for the qualitative detection of archeological artifacts. Given its aforementioned benefits, ZnO-MX/Ag 2 S nanocomposites are potentially attractive photoactive materials for use in vis/NIR PEC immunosensors. Moreover, this demonstrated method offers a feasible method to investigate the history and distribution of ancient silk.
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APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Rui Li,Shuoyang Liang,Aikelaimu Aihemaiti,Shun Li,Zuotai Zhang
Piezocatalysis technology is emerging as a promising strategy for removing organic pollutants from water by harvesting mechanical energy from the surrounding environment. Herein, 2H-MoS 2 flower-like nanosheets with tunable S vacancies was synthesized via a hydrothermal method by adjusting pH of the precursor solution, Mo and S molar ratio, reaction time and temperature. The results showed that the presence of S vacancy leads to significantly enhanced piezoelectric response in the MoS 2 nanosheets, as confirmed by both theoretical calculation using first-principle based density functional theory and probe force microscopy (PFM) measurements. As a result, the as-obtained MoS 2 nanoflower piezocatalyst exhibited excellent degradation efficiency for Orange Ⅱ solution (removal rate > 95 % in 1 h) under ultrasonic vibration (40 kHz and 110 W). Importantly, we demonstrated for the first time that the piezocatalytic performance was tightly related with the water level in ultrasonic cleaner. The present work not only reports a simple and effective strategy for improving the piezocatalytic degradation activity of MoS 2 by introducing vacancy, but also provides new insights and deeper understanding on the underlying mechanism.
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GEODERMA
·
2023
·
IF 6.1
Tongliang Wu,Cun Liu,Peixin Cui,Hongjing Zhang,Sainan Hu,Peng Zhang,Qin Xue,Yaodong Wang,Chenglong Feng,Marcelo Eduardo Alves,Matthew K. Tighe,Yujun Wang
A quantitative evaluation of the dynamics of antimony (Sb) species transformation when Sb(III) enters the soil matrix would facilitate the understanding of the speciation and environmental fate of Sb in natural environments. Towards this end, the coupled sorption and abiotic oxidation kinetics of Sb(III) were examined across 12 soils with a 24 h timeframe. The soil-solution distribution coefficients (K d ) of Sb ranged between 214 and 5965 L kg −1 . Both apparent and mechanistic kinetic models were used to described the process. The apparent kinetic model indicated a two-rate oxidation and associated stabilization behavior of Sb in soils. The fast oxidation rate constants ranged from 0.147 to 0.763 h −1 , which were one to two orders of magnitudes higher than the slow rate constants (0.002–0.039 h −1 ). Iron and Mn oxides were identified as the key soil components associated with adsorptive-oxidative sites (SOH) and oxidative sites (Mn-OH) of soils for Sb species, and these were subsequently integrated into the mechanistic kinetic model. This model included the adsorption–desorption of Sb(III) as well as the oxidation product, Sb(V) on the SOH, the oxidation of Sb(III) by SOH and Mn-OH, and the stabilization of both Sb(III) and Sb(V). The model produced a global fit for dissolved and adsorbed Sb species across the 12 soils. This study provides new information for predicting the dynamics of Sb in soils when multiple adsorption–desorption, oxidation and stabilization reactions are coupled in natural environments.
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Nanoscale
·
2023
·Vol. 15
·期 20
·9049-9059
·
IF 6.7
Xiaolong Deng,Shanshan Wang,Yi Liu,Jiafeng Cao,Jinzhao Huang,Xingwei Shi
In this study, a hierarchical interconnected porous metal sulfide heterostructure was synthesized from CoFeAl layered double hydroxides (LDHs) by a two-step hydrothermal process (sulfidation and a NaOH etching process). Among the as-made samples, the CoFeAl-T-NaOH electrode exhibited excellent oxygen and hydrogen evolution reaction catalytic activities with overpotentials of 344 mV and 197 mV at the current density of 100 mA cm−2, respectively. Meanwhile, small Tafel slopes of 57.7 mV dec−1 and 106.5 mV dec−1 for water oxidation and hydrogen evolution were observed for the CoFeAl-T-NaOH, respectively. Serving as both the cathode and anode for overall water splitting, the CoFeAl-T-NaOH electrode reached a current density of 10 mA cm−2 at a cell voltage of 1.65 V with excellent stability. The enhanced electrocatalytic activity could be attributed to: the hierarchical interconnected nanosheet structure facilitating mass transport; the porous structure promoting electrolyte infiltration and reactant transfer; the heterojunction accelerating charge transfer; and the synergistic effect between them. This study offered a new clue for in situ synthesizing porous transition-metal based heterojunction electrocatalysts with a careful tuning of the sequence of sulfuration and alkaline etching to enhance the electrocatalytic performance.
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Energy Storage Materials
·
2023
·
IF 20.4
Chunfeng Chen,Jinlong Chen,Shuangshuang Tan,Xueting Huang,Yaoyao Du,Bo Shang,Baihua Qu,Guangsheng Huang,Xiaoyuan Zhou,Jingfeng Wang,Lingjie Li,Fusheng Pan
Rechargeable magnesium batteries (RMBs) are considered a highly promising energy storage system . However, the lack of low-cost and highly effective electrolytes severely hinders the development of RMBs. Herein, a tris(2,2,2-trifluoroethyl) borate (B(Otfe) 3 ) co-solvent is introduced into the magnesium-aluminum-chloride complex electrolyte. The electrophilic B(Otfe) 3 as an electron pair acceptor can react with the passivation layer to avoid the electrolytic conditioning process. The B(Otfe) 3 -modified solvation structure with low desolvation energy increases the concentration of active cation, effectively improving the ionic conductivity and area current density. Meanwhile, the B(Otfe) 3 -modified solvation ions with lower LUMO energy induce the formation of the B-F/B-O-containing and MgF 2 -containing solid electrolyte interphase (SEI), reducing the interfacial transfer impedance. The prepared B(Otfe) 3 /MgCl 2 /AlCl 3 (BMA) electrolyte exhibits excellent electrochemical performance with low overpotential (∼122 mV), high average coulombic efficiency (CE) (∼98.2%) and long-term cycling stability (1000 h). Moreover, the BMA electrolyte shows good compatibility with Mo 6 S 8 and CuS cathodes. The Mg|CuS full cell keeps a high specific capacity of 231 mAh g −1 after 80 cycles at 56 mA g −1 , and the Mg|Mo 6 S 8 cell operates 1000 cycles with an average CE of nearly 100%. This work provides an effective way to simultaneously improve the electrolyte solvation sheath and SEI structure for stable magnesium batteries.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Wei Mao,Liguo Wei,Xiaohu Xu,Lishuang Zhao,Junyun Liu,Zihan Zhang
To screen out suitable electrode materials and overcome the shortcomings of the existed electrode materials for the application in dye-sensitized solar cells and supercapacitors , NiS 2 /reduced graphene oxide (NiS 2 /rGO) composite material was prepared by a simple one-step hydrothermal method in this paper and applied in the field of both dye-sensitized solar cells and supercapacitors as electrode material. In an electrolyte of 6 M KOH, the NiS 2 /rGO composite material with bilayer capacitance characteristics exhibited a high specific capacitance of 259.20 F g −1 at the current density of 0.6 A g −1 , which was significantly higher than that of rGO (188.94 F g −1 ). Moreover, at a current density of 2 A g −1 , the NiS 2 /rGO composite material had 92.85% capacitance retention after 2000 cycles. When applied as counter electrode material for the dye-sensitized solar cells, the NiS 2 /rGO composite material counter electrode exhibited a satisfactory photoelectric conversion efficiency ( η ) of 3.16% under standard simulated sunlight (AM 1.5 G), which was significantly higher than that of single rGO counter electrode (improved by 90.40%). The NiS 2 /rGO composite electrode material prepared by a simple one-step hydrothermal method is a potential bi-functional composite electrode materials for both dye-sensitized solar cells and supercapacitors.
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Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Lulu Zhang,Long Jiang,Yaojie Liu,Zongjiang Yu,Ximin Chen,Xiaomeng Su,Mo Xian,Weizhi Sun,Chao Xu
Currently searching for effective noble metal separation material is generally blind and time-consuming. Although theoretical calculation has been widely applied to explain the adsorption mechanism, the quantitative coordination effect between ligand and metal remains to be explored especially in the material screening stage. In this study, Pearson’s theory and Koopmans' theory were used to calculate the electron transfer ratio (ΔN) from different ligands containing N, S, and O to PdCl 2 . The quantitative evaluation contributed to the design of efficient ligands including EA (ΔN =0.5929), DB (ΔN =0.5483), and AT (ΔN =0.4885). And the corresponding polystyrene materials CMPS-EA, CMPS-AT, CMPS-DB were successfully synthesized via chemical modification. According to the adsorption experiment, the per mmol of ligand adsorption capacity from CMPS-EA, CMPS-DB and CMPS-AT for Pd(II) were 0.67 mmol/mmol, 0.17 mmol/mmol and 0.11 mmol/mmol, respectively, exhibiting a positive correlation with the results of ΔN. Moreover, CMPS-EA could efficiently remove 98.01% Pd(II) in the presence of multiple competing metal ions with five times concentration higher than Pd(II). In column study, the breakthrough point (C t /C 0 =0.05) for CMPS-EA was 666–676 BV in 1 mmol/L Pd(II) solution and up to 95% desorption efficiency within 50 BV. The adsorption differences and mechanism of CMPS-EA, CMPS-AT and CMPS-DB were further investigated by FTIR, XPS, ESP, and NBO.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2023
·Vol. 34
·期 15
·1-12
·
IF 2.8
Pan Yusong,Zhu Yuan,Wang Yuanqing,Huang Run,Pan Chengling
Based on the strong capability of transition metal ions for peroxymonosulfate (PMS) activation and highly affinity of MoS 2 towards PMS, thus decorating MoS 2 with transition metal ions would efficiently activate PMS for degradation of organic pollutants. In this work, Co/Fe co-doped MoS 2 catalyst were synthesized by simple chemical method. The prepared Co/Fe co-doped MoS 2 catalyst displayed excellent catalytic activity for organic pollutant degradation. The removal efficiency of RhB and MB is 99% in 6 min and 98% in 15 min under PMS system, respectively. Both the capture experiment and EPR results verified that 1 O 2 played an important role in the organic pollutant degradation process in PMS system. The catalytic mechanism revealed that the synergistic effect between Mo ion and Co/Fe ions is beneficial for boosting the catalytic properties of Co/Fe co-doped MoS 2 catalyst. The cycle experiments confirmed that Co/Fe co-doped MoS 2 possesses excellent chemical stability and re-usability.
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International Journal of Electrochemical Science
·
2023
·
IF 1.5
Zhe Li,Chun-yong Zhang,Hao-yu Wang,Lin Zhu,Hai-tao Liu,Li Shu,Ying-pin Weng
Herein, a simple hydrothermal method was used to synthesize cobalt hydroxide/nickel sulfide and cobalt foam (Co(OH) 2 /NiS@CF) composite electrode. By simply heating cobalt foam in the aqueous solution containing cobalt nitrate, nickel nitrate, and thiourea, Co(OH) 2 /NiS nano stereoscopic website was synthesized on Cobalt foam. X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), and electrochemical tests were used to characterize these composite electrodes. When the molar ratio of Co(NO 3 ) 2 ·6H 2 O to Thiourea of 4:5, Co(OH) 2 /NiS@CF exhibits excellent performance under these tests. The specific capacitance was 1260 F/g at 1.0 A/g. The composite electrode had 92.3% capacitance retention after 2000 charge-discharge cycles at 1.0 A/g.
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