JOURNAL OF HAZARDOUS MATERIALS
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2021
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IF 10.588
Qi Zhao,Xiaoyu Zheng,Lin Xing,Yulian Tang,Xuemei Zhou,Lei Hu,Wenli Yao,Zhengquan Yan
To enlarge the perspective of nanozyme , 2-dimensional Co 3 O 4 stabilizing Rh nano composite (2D Co 3 O 4 @Rh NC) was identified and developed first by one-pot surfactant-aided oxido-reduction. By virtue of the synergetic-reinforcing oxidase activity between 2D Co 3 O 4 substrate and Rh nano particles , the obtained 2D Co 3 O 4 @Rh NC could catalyze the oxidation of chromogenic substrate 3,3′,5,5,’-tetramethylbenzidine (TMB) to blue oxTMB with quite a low Michaelis-Menten constant ( K m ) of 0.018 mM and a quick v max of 6.45 × 10 –8 M s –1 , expressing superior oxidase-like catalysis with a wide temperature range from 20 to 60 °C. Importantly, either bioactive urea or toxic p-aminophenol ( p -Ap) could exclusively alter the existed state of oxTMB with differentiable color changes. Under the optimized conditions, 2D Co 3 O 4 @Rh NC was successfully applied for ratiometric colorimetric sensing urea and p -Ap in environmental water, soil and urine samples with low detection limits (1.1 μM for urea and 0.68 μM for p -Ap) and satisfactory recoveries (96.0–105.8%). The synergetic enhanced oxidase-like activity of 2D Co 3 O 4 @Rh NC and the different reaction mechanisms of the 2D Co 3 O 4 @Rh NC-TMB system to urea and p -Ap were investigated. Not only does the work provide an efficient way for sensing organic pollution of p -Ap, it will offer an efficient potential for diagnosing urea-related diseases on clinical medical testing in future.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2026
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IF 19.7
Zhiheng Wu,Gongkai Zhang,Xuantong Zuo,Hao Ba,Yuran Yu,Yonglong Shen,Guosheng Shao
Metal-free graphene-based electrochemical catalysts are regarded as promising alternatives to precious-metal catalysts for catalyzing both oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) in rechargeable aqueous Zinc–air batteries. Doping is the most common method for metal-free catalysts to tune their electronic properties and surficial structures, albeit having achieved yet inadequate catalytic activity and stability. Herein, we have formulated an architecture to construct nano-heterojunctions between few-layer phosphorene (P_ene) and the N and P co-doped vertical graphene (NPVG) films, thus enhancing interfacial interaction to stabilize P_ene and achieving remarkable catalytic activities for both ORR and OER with the islands of NPVG/P_ene nano-heterojunctions tuning surficial valence electron distribution in NPVG to significantly lower OER barrier without compromising ORR barrier. Ultimately, the NPVG/P_ene based Zn–air battery exhibited exceptionally high peak power density of 246.4 mW cm −2 plus outstanding cycling stability over 500 h at the charge-discharge current density of 10 mA cm −2 , which drastically outperform the benchmark catalyst (Pt/C and RuO 2 ) based battery cells for three times of peak power density and eleven times of cycling stability. This work provides an attractive and sustainable route with nano-heterojunctions peppering on co-doped graphene as effective bifunctional ORR-OER catalysts essential to resilient Zn-air batteries and alkali fuel cells.
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ACS Applied Materials & Interfaces
·
2026
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IF 7.8
Xiaoyu Gui,Weiliang Li,Wenbo Liu,Zhongyuan Pei,Zhiqiang Zhao,Canrong Cao,Guifa Long,Kai Wan,Zhiyong Fu,Zhenxing Liang
Despite the high specific capacity of P′2-NaxMnO2 (NMO), its practical application is severely hindered by rapid capacity decay caused by drastic structural evolution. Herein, a P′2-[Na0.57KxZn0.10-x]Mn0.90Ti0.10O2 (NKxZMTO) cathode featuring K+ and Zn2+ as pillar cations is developed to mitigate O2–-O2– electrostatic repulsion and suppress detrimental phase transition. Physicochemical characterization and theoretical calculations reveal that K+ and Zn2+ co-occupy the Nae site, acting as inert pillars in the Na layers. While NMO undergoes an abrupt and irreversible OP4-P′2-P″2 triphase transition, NK0.02ZMTO maintains a high fraction of P layers within the OP4 phase and exhibits a mild and reversible P′2-OP4 biphase transition. This stabilized interlayer evolution arises from the combined effects of K+ and Zn2+: K+ enlarges the Na layer spacing owing to its large ionic radius, while Zn2+ reduces the electron density on O2– through its high positive charge, thereby simultaneously mitigating O2–-O2– electrostatic repulsion in accordance with Coulomb’s law. Benefiting from this structural stabilization, NK0.02ZMTO delivers superior cyclability (99.2% capacity retention after 150 cycles at 100 mA g–1) and a high specific capacity of 180 mAh g–1 at 10 mA g–1. This work provides an innovative strategy for designing highly stable cathode materials.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2023
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IF 7.2
Meng Tan,Hao Du,Yangjie Fu,Xin Ma,Ningyi Li,Derek Hao,Qi Wang
High-efficiency photoelectrode played a significant role in photocatalytic fuel cell (PFC) systems. In this study, a zinc-based metal-organic framework modified by carbon quantum dots (N-Zn-MOF/CQDs) and the BiVO 4 were respectively presented as the photocathode and photoanode of the PFC system toward Cr(Ⅵ) reduction. Various analytical techniques were utilized to characterize the physicochemical, optical and photoelectrochemical properties of the as-prepared samples. With the addition of CQDs, the visible-light response and charge separation rate were remarkably enhanced. In the PFC system, the circuit current density of 58.04 mA cm −2 and max power density of 1.35 mW cm −2 were achieved, which was superior to other reported PFC systems. Under optimized conditions, 100% Cr(Ⅵ) can be removed within 120 min of visible-light illumination. This work provided a new method to decorate the zinc-based metal−organic framework cathode to dramatically improve the photocatalytic performance.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2022
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IF 9.965
Qingshan Zhao,Xiaojie Tan,Tengfei Liu,Shuai Hou,Wanxin Ni,Hao Huang,Jinqiang Zhang,Zhongxue Yang,Dawei Li,Han Hu,Mingbo Wu
Heteroatom-doped carbon materials have been regarded as sustainable alternatives to the noble-metal catalysts for oxygen reduction reaction (ORR), while the catalytic performances still remain unsatisfactory. Herein, we develop a metal-free adjacent N, P and S-codoped hierarchical porous carbon nanoshells (NPS-HPCNs) through a novel layer-by-layer template coating method. The NPS-HPCNs is rationally fabricated by crosslinking of polyethyenemine (PEI) and phytic acid (PA) on nano-SiO 2 template surface and subsequently coating of viscous sulfur-bearing petroleum pitch, followed by pyrolysis and alkaline etching. Soft X-ray absorption near-edge spectroscopy (XANES) analysis and density functional theory (DFT) calculations prove the engineering of adjacent N, P and S atoms to generate synergistic and reinforced active sites for oxygen electrocatalysis. The NPS-HPCNs manifests excellent ORR activity with a half-wave potential (E 1/2 ) of 0.86 V, as well as promoted durability and methanol tolerance in alkaline medium. Remarkably, the NPS-HPCNs-based Zn-air battery delivers an open-circuit voltage of 1.479 V, a considerable peak power density of 206 mW cm −2 and robust cycling stability (over 200 h), even exceeding the commercial Pt/C catalyst. This study offers fundamental insights into the construction and synergistic mechanism of adjacent heteroatoms on carbon substrate, providing advanced metal-free electrocatalysts for Zn-air batteries and other energy conversion and storage devices.
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JOURNAL OF HAZARDOUS MATERIALS
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2022
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IF 14.224
Chengyu Zhang,Zhisheng Yu,Xiangyang Wang,Bobo Wang
In this study, a novel γ-Fe 2 O 3 /biochar (BF γ ) composite by a plant in-situ enrichment and one-step pyrolysis strategy was prepared, which was applied as a photocatalyst to activate peroxymonosulfate (PMS) for the degradation of p-chlorophenol (4-CP) under visible light irradiation (BF γ /PMS/Vis) system. The characterization results exhibited that γ-Fe 2 O 3 with localized carbon doping was evenly embedded in biochar during the pyrolysis. BF γ exhibited better photoresponse properties than biochar (BC) and γ-Fe 2 O 3 . The removal efficiency of this system for 4-CP reached 96.41% under optimal conditions. This system showed high removal efficiency with a wide pH range (3.0–13.0) and under conditions of different organic pollutants . It also showed strong resistance to interference with co-existing inorganic ions and humic acid (HA). Electron paramagnetic resonance (EPR) and radical scavenging experiments revealed that the reactive oxygen species (ROS) in this system included SO 4 - ·, ·OH, ·O 2 - and 1 O 2 . The density functional theoretical (DFT) calculations further revealed the promotion of localized carbon doping in γ-Fe 2 O 3 on electron transfer and photoresponse, including C-O bond (d=1.29 Å), C-Fe bond (d=1.80 Å) and band gap value (E gap < 0.72 eV). This study provides new insights into constructing environmentally-friendly catalysts and the possibility of the solid waste recycling for other wetland plants.
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REACTIVE & FUNCTIONAL POLYMERS
·
2023
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IF 5.1
Chentao Liu,Huajun Duan,Huijuan Zhao,Yuan Gao,Juan Zhang,Jin Kang,Huiru Ma
The demand for flame retardancy in epoxy thermosetting resins (EP) has become increasingly urgent, but the mechanical properties should not be damaged while ensuring flame-retardancy efficiency. To achieve this, a heterocyclic compound (BDP) containing reactive functional groups was successfully synthesized by 2,4-Diamino-6-phenyl-1,3,5-triazine (DPT), paraformaldehyde and 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) in a one-pot process. From the analysis of the curing behavior, the addition of BDP facilitated the curing reaction of EP by reducing the apparent activation energy (E c ). Dynamic mechanical analysis (DMA) and flexural tests indicated an increase in the glass transition temperature (T g ) and flexural strength of the flame-retardant epoxy resin (FREP) increased by 5.2% and 8.9% respectively, caused by an enhancement of intermolecular forces . As well, a V-0 classification in vertical combustion with a limiting oxygen index (LOI) of 35.2% was attained at a phosphorus content of merely 0.48 wt%. Cone calorimetric (CC) test demonstrated that total smoke production (TSP) and the peak heat release rate (PHRR) of EP-7.5/BDP were reduced by approximately 19.2% and 29.4% respectively in comparison to EP. This positive smoke inhibition and flame retardancy were caused by the blocking and dilution effect presented by the FREP during combustion.
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ChemElectroChem
·
2023
·Vol. 10
·期 18
·e202300283
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IF 4
Yang Ming,Yidi Wang,Jiachuan Hua,Chang Liu,Jiashen Li,Bin Fei
Graphical A facile PVP assisted Zn 0.2 @ZIF-67 framework is thermally converted to micro-mesoporous carbon with abundant cobalt particles. Post phosphorus doping into carbon shells improves catalysts’ conductivity and modulates the electronic environment of Co element, facilitating efficient water splitting. The enhancement of electrocatalytic water splitting by modulating the intrinsic electronic environment of active sites has recently attracted lots of interest. Herein, cobalt-cobalt oxide (CoO x ) at carbons derived from metal-organic frameworks (Zn 0.2 @ZIF-67) have been modulated by using post-phosphine (P-CoO x /NCs), acid leaching (Co/NCs), and oxidation (O−CoO x /NCs) treatments. With the assistance of polyvinyl pyrrolidone, the resultant carbons obtain a high surface area (645.7 m 2 g −1 ) as well as a micro-/mesoporous system after carbonization at 920 °C. These advantages not only enhance the catalytic performance of catalysts, but also facilitate the charge transfer between interfaces towards the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER). As a result, the constructed water splitting cell fabricated with 900P-CoO x /NCs requires a low overpotential (89 mV and 343 mV vs. reservable hydrogen electrode respectively) to drive HER and OER at 10 mA cm −2 , a low cell voltage (1.69 V), and a high stability with only 4.9 % decay after 15 hours operation in the alkaline medium.
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CHEMICAL ENGINEERING JOURNAL
·
2023
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IF 15.1
Guangjun Ji,Cunyao Li,Pan Gao,Miao Jiang,Lei Ma,Guoqing Wang,Guangjin Hou,Li Yan,Yunjie Ding
Tuning the microenvironment surrounding single atom metals is an effective but challenging way to regulate the performance of single atom catalysts (SACs). Herein, we prepared a series of P, N-abundant porous organic polymers (P&N-POPs) with diverse framework flexibility and coordination ability to serve as SACs’ carriers. The microenvironment (coordination site, coordination number) surrounding Rh and the equilibrium of ea / ee -HRh(CO) 2 P 2 active species were effectively regulated in Rh/P&N-POPs catalysts. Our study shows that the specific active ee -HRh(CO) 2 (P) 2 species confined in the flexible polymeric skeleton endowed the Rh/ m PPh 3 &PPD-POP with superior activity (TOF = 2000 h −1 ), selectivity of aldehydes (93.5 %), ratio of linear aldehyde to branched aldehyde (l/b ratio = 15.9), favorable stability (10 recycling runs without activity loss) and extensive substrate applicability (19 kinds of olefins) in hydroformylation reactions. Multiple characterization techniques (EXAFS, STEM, in-situ FTIR etc.) were employed to get insights into this effective strategy to regulate the performance of single atom catalysts (SACs).
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
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IF 5.2
Yingjie Cai,Le Li,Tianjie Wang,Ying Ren,Md. Nahid Pervez,Ai Chen,Xiaohua Zhao,Lina Lin,Xiaorong Xiong,Mohammad Mahbubul Hassan
This study explores a new approach to achieve a whitening effect on polyester fabric by utilizing a ground form of raw OB-1 (OB-1-G) in combination with dispersing agents. The whitening process parameters, such as whitening temperature, OB-1-G mass, and whitening time were optimized using the L 16 orthogonal array-based Taguchi methodology. The signal-to-noise ratio was carried out through a larger-is-better approach to augment the parameter responses, specifically the whiteness. The results suggest that the degree of whiteness of polyester fabric is significantly affected by the whitening treatment temperature (P < 0.05), with a contribution percentage of 93.87%. A whiteness index of 94.12 was achieved for the polyester fabric treated at the optimized conditions. The fabric treated with OB-1-G at the optimized conditions was characterized by Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), thermogravimetric analysis (TGA), and X-ray diffraction (XRD). The investigation also included the correlation between the length of time spent in washing and rubbing, and their efficacy in achieving whitening outcomes. The research demonstrated the effectiveness of OB-1-G nanopowder in combination with dispersing agents as a fluorescent optical brightener for the optical brightening of polyester fiber with potential use in the textile industry on a larger scale.
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LANGMUIR
·
2023
·
IF 3.9
Li’an Jiang,Song Tian,Yuhui Xie,Xue Lv,Shulin Sun
Traditional hydrogels with a single-crosslinked network structure suffer from poor stretchability, low sensitivity, and easy contamination, which seriously affect their practical application in the strain sensor field. To overcome these shortcomings, herein, a multiphysical crosslinking strategy (ionic crosslinking and hydrogen bonding) was designed to prepare a hydrogel strain sensor based on chitosan quaternary ammonium salt (HACC)-modified P(AM-co-AA) (acrylamide-co-acrylic acid copolymer) hydrogels. The ionic crosslinking for the double-network P(AM-co-AA)/HACC hydrogels was achieved by an immersion method with Fe3+ as crosslinking sites, which crosslinked with the amino group (−NH2) on HACC and the carboxyl group (−COOH) on P(AM-co-AA) and enabled the hydrogels to recover and reorganize rapidly, resulting in a hydrogel-based strain sensor with excellent tensile stress (3 MPa), elongation (1390%), elastic modulus (0.42 MPa), and toughness (25 MJ/m3). In addition, the prepared hydrogel exhibited high electrical conductivity (21.6 mS/cm) and sensitivity (GF = 5.02 at 0–20% strain, GF = 6.84 at 20–100% strain, and GF = 10.27 at 100–480% strain). Furthermore, the introduction of HACC endowed the hydrogel with excellent antibacterial properties (up to 99.5%) and excellent antibacterial activity against bacteria of three forms, bacilli, cocci, and spores. The flexible, conductive, and antibacterial hydrogel can be applied as a strain sensor for real-time detection of human motions such as joint movement, speech, and respiration, which exhibits a promising application prospect in wearable devices, soft robotic systems, and other fields.
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ANALYTICA CHIMICA ACTA
·
2022
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IF 6.911
Xuebo Liu,Fangyuan He,Liwei Bai,Xiaowei Cao,Chang Liu,Wenbo Lu
Hydroquinone (HQ) and catechol (CC) are important chemical raw materials in the modern industry, unfortunately, which are also high toxic phenolic pollutants. So how to achieve highly sensitive and selective determination HQ and CC is the challenge we face. In the present work, we report a facile strategy to obtain nitrogen and phosphorous co-doped glucose-derived carbon coated CoP nanowires (G-CoP/N,P–C NWs), in which nitrilotriacetic acid (NTA) was as the chelating reagent, glucose was as carbon source, and the precursors were subsequently experienced carbonization and phosphorization process. G-CoP/N,P–C NWs can shorten the distance of the electron transport and expand the reaction area, showing the intriguing electronic conductivity and electrocatalytic abilities. An electrochemical phenolic sensor based on G-CoP/N,P–C NWs is fabricated. The as-prepared sensor showcases the good sensing performance for HQ and CC with comparative linearity ranges of 0.8–900 μM (HQ) and 0.6–800 μM (CC), low limits of detections (LODs) of 0.18 μM (S/N = 3) and 0.12 μM (S/N = 3) for HQ and CC, respectively. Notably, it also displays excellent practical application for the recognition of HQ and CC in the rain water, the tap water , the domestic wastewater and the lake water, which may be a promising candidate in environmental water monitoring and drinking water safety.
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