CHEMICAL ENGINEERING JOURNAL
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2025
·
IF 13.2
Xiaochen Qi,Fuli Li,Chih-Huang Weng,Kai Liu,Renchuan Fu,Na Liu,Longzhen Ding
2-(2-Hydroxy-5-methylphenyl) benzotriazole (UV-P), a high-production and structurally complex benzotriazole derivative, has an uncertain degradation pathway and transformation dynamics in aquatic environments, raising concerns about its potential toxicological risks to human health and the ecological systems. This study investigated the oxidative degradation of UV-P by ferrate(VI) in aqueous solution under controlled experimental conditions. The results demonstrated that ferrate(VI) efficiently degraded UV-P under alkaline conditions, achieving a maximum removal efficiency of 91.76 % at pH 8.0. Furthermore, the influence of various environmental factors, including pH, oxidant dosages, inorganic ions (HCO 3 − , Cl − , Br − , NO 3 − , Ca 2+ , K + , Mg 2+ , and NH 4 + ), and humic acid, on the ferrate(VI)-mediated oxidative degradation of UV-P were systematically examined. The results indicated that although inorganic ions and humic acid partially inhibited the degradation process, a satisfactory degradation efficiency was still attained. The intermediate identification results indicated that the ferrate(VI)-mediated oxidative degradation of UV-P primarily proceeded via bond cleavage, oxygen atom transfer, and radical coupling reactions, resulting in the formation of cleavage products, hydroxylated derivatives, and polymeric compounds. The oxidative degradation pathway of UV-P and key reactive sites targeted in the ferrate(VI) degradation system were examined through quantum chemical methods, including analyses of atomic charge distribution and frontier electron density. The toxicity assessment highlighted the need to focus on the chronic toxicity of specific aminated degradation products. This study is essential for elucidating the degradation mechanism of the benzotriazole compound UV-P in aquatic environments and comprehensively assessing its potential biotoxicity.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
·
IF 9.7
Dan Han,Mingyan Zhang,Haochen Zhang,Yongyi Zhang,Jinping Wang,Rui Yang,Chunling Zuo,Xiaoshuang Chen
Electrolysis of water is an environmental protection technology to generate hydrogen and alleviate energy depletion problem. In this paper, the hierarchical tremella flower composite was fabricated by nickel‑iron layered double hydroxide (NiFeLDH) and nonmetallic phosphorus-doped cobalt molybdenum oxide (P-CMO). A good deal of uniform nanosheets with the thickness of ∼48 nm constitute three-dimensional (3D) flower architecture. Compared with NiFeLDH and P-CMO, the P-CMO/NiFeLDH exhibits excellently electrocatalytic activity in oxygen evolution reaction (OER) and hydrogen evolution reaction (HER), achieving the overpotentials (ƞ 10 ) of 254.9 mV and 96.3 mV as well as the Tafel slopes of 35.5 mV dec −1 and 79.2 mV dec −1 , respectively. Furthermore, it requires a cell voltage of 1.43 V to reach a current density of 10 mA cm −2 in an electrolyzer consisting of P-CMO/NiFeLDH as both anode and cathode. The characterizations and density functional theory (DFT) calculations demonstrate that the interfacial synergism of P-CMO/NiFeLDH can induce the electron redistribution by charge transfer from NiFeLDH to P-CMO, augment the generation of high valence nickel, decrease the reaction energy barrier and enhance the reaction kinetics. This work declares that the layered double hydroxide integrated with heteroatom-substitutional transition metal oxide furnishes an affordable route for devising efficient electrocatalysts in water-splitting application.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2025
·
IF 9
Chen Yuqing,Wu Xuan,Yan Taihong,Wang Wentao,Liu Junjie,Wang Hui
NTAamide(C8) exhibits high selectivity for the extraction of Pu(IV) across a wide range of nitric acid concentrations. To separate trace Pu(IV) from radioactive liquid stream generated during the PUREX process in spent nuclear fuel reprocessing, a novel silica-polymer-based adsorbent, NTAamide(C8)/SiO 2 -P, was synthesized via vacuum impregnation using NTAamide(C8) as the extractant and SiO 2 -P as the support. The adsorption performance of Pu(IV) were systematically evaluated. Batch experiments revealed that adsorption equilibrium was achieved within 2 h, with a maximum adsorption capacity of 143.2 mg/g for Pu(IV). The material demonstrated high selectivity for Pu(IV) and exhibited excellent radiation resistance and hydrolytic stability. The adsorption mechanisms were further elucidated using X-ray photoelectron spectroscopy (XPS) and density functional theory (DFT) calculations, confirming the formation of 1:1 complexes between NTAamide(C8) and the metal ions. Column experiments using actual uranium product solution from the PUREX process verified the material's performance in trace Pu(IV) removal. After column treatment, the Pu content in the uranium product solution was reduced to below 10 Bq/gU, with no significant loss of uranium. These results demonstrate that NTAamide(C8)/SiO 2 -P is a promising adsorbent for the efficient and selective separation of Pu(IV) from radioactive liquid stream under a wide range of nitric acid concentrations.
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ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Anjie Lai,Youqi Chu,Juantao Jiang,Youguo Huang,Sijiang Hu,Qichang Pan,Fenghua Zheng,Jun Wang,Jie Li,Hongqiang Wang,Qingyu Li
Olivine-type lithium iron phosphate LiFePO 4 (LFP) is widely used as the cathode for lithium ion batteries in electric vehicles due to its excellent structural stability and low cost. Herein, LFP/C composites are prepared using expired beer as carbon source, which exhibits environmentally friendly benignity and provides a uniform N, P in-situ co-doped carbon layer. On one side, the polysaccharides and monosaccharides in beer has strong steric hindrance ability, which inhibits the growth of particles during sintering. On the other side, the uniform N, P co-doping tunes the electron cloud of the carbon layer, improving the electronic conductivity. As a result, the as-prepared LFP/C composite shows enhanced rate capabilities and structural stability. In detail, the material delivers the initial specific discharge capacity of 134 mAh•g −1 with capacity retention of 94.5% after 1000 cycles at a high rate of 5 C. Even at a higher rate of 10 C, it has a specific discharge capacity of 123 mAh•g −1 . Besides, the LFP/C displays enhanced low-temperature performance compared to conventional carbon-coated LFP. Therefore, this work demonstrates the advantages of using expired beer as carbon source for LFP cathode material , which is also feasible for other carbon-coated cathode or anode materials , beneficial for increasing the power density of lithium ion batteries .
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ACS Sustainable Chemistry & Engineering
·
2019
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IF 6.97
Chunjie Li,You Xu,Dandan Yang,Xiaoqian Qian,Xingjie Chai,Ziqiang Wang,Xiaonian Li,Liang Wang,Hongjing Wang
The exploration of highly efficient catalysts for electrochemical hydrogen and oxygen production via water splitting is very significant for providing affordable clean energy and reducing the reliance on conventional fossil fuels. Herein, we develop an efficient method to boost the electrocatalytic performance of Pt mesoporous nanoparticles (Pt MNs) for both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) by a facile Ni, P co-incorporation strategy. The co-incorporation of Ni and P atoms in a Pt crystal structure can effectively modify its electronic structure, which contributes to the superior catalytic ability toward HER. We also demonstrate that the as-fabricated PtNiP MNs could occur surface partial oxidation under oxidizing potentials to in situ form OER electroactive oxides/hydroxides species. The unique mesoporous structure and metal–nonmetal ternary alloyed composition make the PtNiP MNs a promising HER–OER bifunctional electrocatalyst for overall water splitting in alkaline media.
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Canadian Journal of Chemistry
·
2018
·Vol. 97
·期 2
·
IF 1.084
Tian Gan,Zhikai Wang,Mengru Chen,Wanqiu Fu,Haibo Wang,Junyong Sun
In this work, the Ag@Cu particles with yolk–shell nanostructure was prepared by facile solvothermal method, which was modified on glassy carbon electrode (GCE) to fabricate electrochemical sensor for the convenient and fast determination of p-aminobenzoic acid (PABA). The surface morphology and electrochemical properties of the as-prepared Ag@Cu nanocomposite modified electrode were characterized by scanning electron microscopy, transmission electron microscopy, chronocoulometry, and electrochemical impedance spectroscopy. Further, the electrochemical sensing of PABA was performed on the Ag@Cu/GCE using cyclic voltammetry and differential pulse voltammetry techniques, showing high catalytic activity. Under the optimal conditions, the sensor exhibited a wide linear range, high sensitivity, and low detection limit of 0.315 μmol/L for PABA. The developed sensor was also successfully applied for PABA detection in anesthetic and cosmetics with satisfactory results.
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Journal of the Taiwan Institute of Chemical Engineers
·
2021
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IF 5.876
Lihua Qi,Hailin Jiang,Tianni Lin,Xinyu Chang,Bolong Jiang
Background The aim of this study was to develop a class of novel MIL-53(Al) based composite with high phenolic compound adsorption capacity to treat highly toxic phenolic wastewater. Method MIL-53(Al)@AC-x composites with different AC loading ( x ) were constructed by combining MIL-53(Al) with cheap biomass AC derived from cheap rice husk. The adsorbents were characterized by various methods. Significant findings The results showed that the surface area and pore volume of all MIL-53(Al)@AC-x composites increased remarkably, which are much higher than those of pristine AC and MIL-53(Al). The p-nitrophenol adsorption rate of MIL-53(Al)@AC-10 was higher than pristine MIL-53(Al) by 36%. The adsorption performance decreased in the order of MIL-53(Al)@AC-10 > MIL-53(Al)@AC-15 > MIL-53(Al)@AC-5 > MIL-53(Al). The maximum adsorption capacity for p-nitrophenol of MIL-53(Al)@AC-10 reached 250 mg.g −1 , which are higher than the data reported in most literature. The fabrication of AC into MIL-53(Al) is a promising method to obtain a composite with high adsorption capacity and stability. The adsorption kinetics and isotherms fitted well with pseudo-second-order model and Langmiur model. The adsorption is mainly through the π-π and hydrogen bond interactions, and hydrophobic effect.
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JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2020
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IF 3.807
Ken Chen,Jianxin Liu,Hongli Bian,Wenjun Wang,Feijun Wang,Ziqiang Shao
Fabricating continuous porous carbon nanofibers (CNFs) based on biomass materials still remains challenging for current supercapacitors (SCs) results from the limitation of carbon yield and molecular flexibility. In this work, P and N dual-doped 1D porous carbon nanofibers (PNF) are prepared through a controllable way by electrospinning phytic acid solution of chitosan (CS)/ polyvinylpyrrolidone (PVP) with subsequent crucial segmented carbonization . Due to the ultra-high specific surface area, extremely low charge transfer resistance, and the contribution of N, P dual doping to pseudocapacitors, the obtained PNF exhibits the highest specific capacitance of 358.7 F g −1 at a current density of 1 A g −1 . More notably, a symmetrical SC assembled by PNF achieves an outstanding capacitance of 94 F g −1 at a current density of 0.5 A g −1 , and a high energy density of 13.1 W h kg −1 at a power density of 248 W kg −1 , furthermore, a high capacitance retention of 87.5% is performed after 10,000 cycles. It is firmly believed that the research on the preparation method and performance of carbon nanofibers involved in this article is of profound inspiration for mobile power sources.
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ADVANCED FUNCTIONAL MATERIALS
·
2017
·Vol. 27
·期 23
·1700522
·
IF 12.124
Feier Niu,Jing Yang,Nana Wang,Dapeng Zhang,Weiliu Fan,Jian Yang,Yitai Qian
MoSe 2 grown on N,P-co-doped carbon nanosheets is synthesized by a solvothermal reaction followed with a high-temperature calcination. This composite has an interlayer spacing of MoSe 2 expanded to facilitate sodium-ion diffusion, MoSe 2 immobilized on carbon nanosheets to improve charge-transfer kinetics, and N and P incorporated into carbon to enhance its interaction with active species upon cycling. These features greatly improve the electrochemical performance of this composite, as compared to all the controls. It presents a specific capacity of 378 mAh g −1 after 1000 cycles at 0.5 A g −1 , corresponding to 87% of the capacity at the second cycle. Ex situ Raman spectra and high-resolution transmission electron microscopy images confirm that it is element Se, rather than MoSe 2 , formed after the charging process. The interaction of the active species with modified carbon is simulated using density functional theory to explain this excellent stability. The superior rate capability, where the capacity at 15 A g −1 equals ≈55% of that at 0.5 A g −1 , could be associated with the significant contribution of pseudocapacitance. By pairing with homemade Na 3 V 2 (PO 4 ) 3 /C, this composite also exhibits excellent performances in full cells.
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JOURNAL OF LUMINESCENCE
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2022
·
IF 4.171
Chenfei Xiang,Xiuping Wu,Yanjie Zhang,Zihan Zhao,Desheng Li,Hao Song,Bing Li
White light with excellent color rendering property has been highly required for comfortable and healthy illumination. A facile strategy to achieve high color rendering index (Ra >90) in practical applications is using near ultraviolet chips as excitation sources combined with RGB phosphors. However, achieving high color rendering with both blue chips and near-ultraviolet (NUV) chips for commercial phosphors dispersed in phosphor-in-glass (PiGs) materials is still a big challenge. In this work, the PiG based on the ultra-low melting point Sn–F–P–O glass with commercial green (Lu 3 Al 5 O 12 :Ce 3+ ) and red (Sr x Ca 1-x AlSiN 3 :Eu 2+ ) phosphors has been successfully fabricated by one-step sintering method. The phase identification and distribution of monochromatic red phosphor in glass (R-PiG) and green phosphor in glass (G-PiG) were investigated in detail. The Sn 2+ ions in Sn–F–P–O matrix show the intense blue emission bands centered at 420 nm under the excitation of NUV chips (365 nm). Notably, the polychromatic red/green phosphor in glasses (R/G-PiGs) are versatile and exhibited excellent color rendering (Ra = 93, Ra = 95, Ra = 92, respectively) properties excited by both blue chips, NUV chips and laser diodes (WLD). The working temperature of R/G-PiGs is stable at ∼33 °C and ∼55 °C when employed in WLEDs/WLDs (1 W), which greatly prevented the phenomenon of “thermal quenching” for the phosphors caused by high temperature. Thus, the versatile R/G-PiG with ultra-high color rendering and excellent thermal properties indicates its promising application in high-power white LEDs/LDs.
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JOURNAL OF POWER SOURCES
·
2023
·
IF 9.2
Chang Su,Guoqiang Liu,Guangyin Liu,Lei Wen
The P2-Na 0.67 Fe 0.1 Mn 0.9 O 2 materials with P 6 3 /mmc space group structure is a promising cathode material for sodium-ion batteries due to its low cost and high capacity. However, the occurrence of various phase transitions reduces the cycle reversibility of the compound. In this study, P′2-Na 0.67 Fe 0.1 Mn 0.9 O 2-δ with C mcm space group structure is synthesized by regulating oxygen vacancies content for the first time. The effect of oxygen vacancies on the structural evolution of the material during charge-discharge processes is further investigated by in-situ X-ray diffraction (XRD) techniques. Compared to P2-Na 0.67 Fe 0.1 Mn 0.9 O 1.98 , P′2-Na 0.67 Fe 0.1 Mn 0.9 O 2-δ experiences smaller Jahn-Teller distortion when intercalating and deintercalting Na + . Meanwhile, it exhibits better electrochemical performance . The initial discharge capacity reaches 200 mAh g −1 at a current density of 20 mA g −1 with the capacity retention of 70.8% after 200 cycles at the current density of 400 mA g −1 .
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BIORESOURCE TECHNOLOGY
·
2026
·
IF 8.2
Guangyao Yang,Bingjie Liu,Shiyuan Xie,Yongqing Xu,Jingbo Jia,Hui Zhou,Dongwu Chang,Changfu You,Haiming Wang,Junfu Lyu
Biomass chemical looping gasification (BCLG) demonstrates great potential to help address global environmental issues and green energy demands. Yet it remains a challenge to develop novel oxygen carriers (OCs) in BCLG to break the trade-off between the biomass conversion and syngas selectivity with high syngas yield. In this study, Sr–Fe OCs labelled as S3F2, S4F2, and S5F2, containing primarily of Ruddlesden–Popper (R-P) layered perovskite structured Sr 3 Fe 2 O 7-x , were synthesized. Sr 3 Fe 2 O 7-x thermodynamically favors the selective formation of CO over CO 2 , conferring its inherently high CO selectivity. Both the interstitial oxygen and lattice oxygen were found to contribute to the gasification process, which presented enhanced activity and oxygen uncoupling characteristic. The excessive Sr incorporation in S4F2 and S5F2 further increased the oxygen vacancies of Sr 3 Fe 2 O 7-x , and caused a much higher oxygen mobility and oxygen release capacity (S5F2 > S4F2 > S3F2). Additional Sr in S5F2 formed Sr(OH) 2 ·H 2 O on Sr 3 Fe 2 O 7-x surface, which acted as additional oxygen source for gasification and also suppressed the overoxidation of syngas product on the surface. These combined features enabled the most favorable performance of S5F2 with a carbon conversion of 91%, CO selectivity of 94%, and syngas yield of 1208 mL/g at 900 °C, much higher than the Fe 2 O 3 benchmark (77.8%, 59.8%, and 557.9 mL/g, respectively).
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