INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2019
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IF 4.084
Huiming Li,Yang Wang,Wei Zhu,Zhongbin Zhuang
Searching for low-cost electrocatalysts with high activity towards the hydrogen evolution reaction (HER) is of great significance to enable large-scale hydrogen production via water electrolysis . In this study, by using inverse spinel MFe 2 O 4 (M = Mn, Fe, Co, Cu) nanoparticles (NPs) as the precursors, monodisperse bimetallic phosphide M-Fe-P NPs/C with hollow structures were readily obtained by a gas-solid annealing method. These hollow phosphide NPs displayed excellent HER activity in an acidic medium with a low loading amount of 0.2 mg cm −2 . In particular, the Co–Fe–P NPs/C shows highest HER activity that only requiring an overpotential of 97 mV to retain a current density of 10 mA cm −2 . A volcano relation between activity and incorporated elements was revealed. Incorporation of cation with high electronegativity stabilized the FeP active centres, while phase segregation resulted in the loss of activity for Cu–Fe–P NPs/C.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2019
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IF 5.107
Yan Zhang,Huimin Ruan,Changmeng Guo,Junbin Liao,Jiangnan Shen,Congjie Gao
Innovative approaches to restraint bacterial adhesion and growth on membranes are significantly needed to avoid membrane performance decaying for biofouling. In this work, a series of thin film nanocomposite (TFN) reverse osmosis (RO) membranes has been prepared by incorporating nano-fillers of p -aminophenol-modified graphene oxide (mGO) into the polyamide skin layer via interfacial polymerization. Our investigations demonstrate that the introduction of mGO nano-fillers into the functional skin layers reduces the hydrophilicities with the water contact angles drop from 69.6° to 48.2° and meanwhile decreases the thickness of functional skin layers from 240 nm to 50 nm, relative to pristine polyamide RO membrane without nano-fillers. As a result, the as-prepared TFN RO membrane at optimized conditions shows a water flux of 23.6 L·m −2 ·h −1 and a NaCl rejection rate of 99.7%, reflecting a remarkable promotion in water flux (by 24.5%) compared with the pristine RO membrane. In addition, the data statistics of the live/dead fluorescent imaging assay demonstrate that TFN RO membrane with mGO exhibits bacterial killing ratios of 96.78% and 95.26% against E. coli and S. aureus at the additive loading of 0.005 wt%, which are much higher than RO membrane with GO (90.64%; 90.43%) and pristine RO membrane (4.95%; 2.48%). This work demonstrates a facile way to TFN RO membranes with good separation performance and desirable antibacterial capacities.
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JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2017
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IF 2.625
Zhilan Cai,Yuming Zhou,Shuaishuai Ma,Shiwei Li,Haiyong Yang,Shuo Zhao,Xi Zhong,Wenting Wu
A novel g-C 3 N 4 /CuS p - n heterostructured photocatalyst has been fabricated through an in situ synthesis technique. The samples were characterized through X-ray diffraction, energy dispersive spectroscopy, X-ray photoelectron spectroscopy, transmission electron microscopy and UV–vis spectroscopy. And the results indicated that CuS nanoparticles were closely anchored on the surface of g-C 3 N 4 with good dispersion. The g-C 3 N 4 /CuS heterojunctions exhibited enhanced photocatalytic performance in degradation of RhB and MB than that of pure g-C 3 N 4 and CuS, and the selected sample of g-C 3 N 4 /CuS-2 displayed the best photocatalytic activity. The degradation rates of RhB and MB with g-C 3 N 4 /CuS-2 photocatalyst were 8.914 and 13.543 times higher than that of pure g-C 3 N 4 , and 3.023 and 6.373 times higher than that of pure CuS, respectively. The enhancement of photocatalytic activity may be ascribed to the matched overlapping band structure and the interaction between CuS and g-C 3 N 4 . The interaction between g-C 3 N 4 and CuS would not only improve the optical absorption property of g-C 3 N 4 , but also create more interface for the efficiently transfer of photo-generated electron-hole pairs to restrict the recombination, which was proved by the photoluminescent spectra. Moreover, a possible photocatalytic mechanism has been tentatively proposed according to the experimental results.
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JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2017
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IF 2.323
Yüfang Wu,Xiaolu Zhang,Yanchao Di,Yu Kang,Li Bai
The solubility of p-toluenesulfonamide and o-toluenesulfonamide in seven monosolvents of methanol, ethanol, n-propanol, isopropanol, n-butanol, acetonitrile, and ethyl acetate were measured by using the isothermal saturation method at temperatures ranging from 283.15 to 318.15 K under 101.3 kPa. The mole fraction solubility of p-toluenesulfonamide and o-toluenesulfonamide in those selected monosolvents increased with the increase in temperature. The maximum mole fraction solubility of o-toluenesulfonamide was observed in ethyl acetate (0.07748 at 318.15 K), followed by that in acetonitrile (0.07368 at 318.15K), methanol (0.05790 at 318.15 K), ethanol (0.04564 at 318.15 K), n-propanol (0.04271 at 318.15 K), isopropanol (0.04142 at 318.15 K), and n-butanol (0.03879 at 318.15 K). For p-toluenesulfonamide + solvents systems, the maximum mole fraction solubility was observed in acetonitrile (0.1588 at 318.15 K), followed by that in ethyl acetate (0.1329 at 318.15K), methanol (0.1043 at 318.15 K), ethanol (0.09142 at 318.15 K), n-propanol (0.06888 at 318.15 K), isopropanol (0.05092 at 318.15 K) and n-butanol (0.05645 at 318.15 K). The measured solubility data were correlated and calculated by using the modified Apelblat equation, Buchowski–Ksiazaczak λh equation, Wilson model, and NRTL model. The largest values of relative average deviations (RAD) and the root-mean-square deviations (RMSD) between the experimental and calculated solubility were 0.87 × 10–2 and 8.46 × 10–4, respectively. On the basis of the obtained solubility, the standard enthalpy of solution (ΔHsolo), the standard Gibbs energy (ΔGsolo) of solution, and the standard entropy of solution (ΔSsolo) of p-toluenesulfonamide and o-toluenesulfonamide dissolved in monosolvents were calculated. The results show that the dissolution of p-toluenesulfonamide and o-toluenesulfonamide in these monosolvents is a spontaneous process. The correlation and curve fitting results indicated good correlation of the experimental solubility data of p-toluenesulfonamide and o-toluenesulfonamide with the modified Apelblat model. Therefore, the experimental solubility and correlation equations established in this study can be useful in the crystallization, purification in laboratories, and related industries.
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CHINESE JOURNAL OF CATALYSIS
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2017
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IF 2.813
Xin Liu,Yuhong Zhang,Yushuai Jia,Junzhe Jiang,Yabin Wang,Xiangshu Chen,Tian Gui
We report the fabrication and photocatalytic property of a composite of C/CaFe 2 O 4 nanorods (NRs) in an effort to reveal the influence of carbon modification. It is demonstrated that the photocatalytic degradation activity is dependent on the mass ratio of C to CaFe 2 O 4 . The optimal carbon content is determined to be 58 wt% to yield a methylene blue (MB) degradation rate of 0.0058 min −1 , which is 4.8 times higher than that of the pristine CaFe 2 O 4 NRs. The decoration of carbon on the surface of CaFe 2 O 4 NRs improves its adsorption capacity of the MB dye, which is specifically adsorbed on the surface as a monolayer according to the adsorption isotherm analysis. The trapping experiments of the reactive species indicate that superoxide radicals ( • O 2 − ) are the main active species responsible for the removal of MB under visible-light irradiation. Overall, the unique feature of carbon coating enables the efficient separation and transfer of photogenerated electrons and holes, strengthens the adsorption capacity of MB, and improves the light harvesting capability, hence enhancing the overall photocatalytic degradation of MB.
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Journal of the Taiwan Institute of Chemical Engineers
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2017
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IF 4.217
Qun-Zeng Huang,Ji-Chao Wang,Li-Qun Ye,Qian Zhang,Hong-Chang Yao,Zhong-Jun Li
The construction of p–n heterojunction is an efficient strategy to restrain photogenerated charge carriers recombination and enhance the photocatalytic efficiency toward H 2 evolution from water splitting. Herein a novel p–n heterojunction Mn 0.25 Cd 0.75 S/Co 3 O 4 was synthesized via facile hydrothermal method. Photocatalytic H 2 evolution of as-synthesized Mn 0.25 Cd 0.75 S/Co 3 O 4 composites in the absence of noble metal co-catalysts under visible light irradiation ( λ ≥ 400 nm) was investigated. The results demonstrated that photocatalytic H 2 evolution of Mn 0.25 Cd 0.75 S was significantly enhanced by loading Co 3 O 4 nanoparticles . It was confirmed that 0.48 wt% of Co 3 O 4 loading content achieved the highest H 2 evolution rate of 25.71 mmol/g/h, which was about 5.35 times higher than that of pure Mn 0.25 Cd 0.75 S. The remarkably improved photocatalytic activity could be attributed to the formation of the p–n junction at the interface between Mn 0.25 Cd 0.75 S and Co 3 O 4 , effectively promoting interfacial charge transfer and separation. This work revealed that the p–n heterojunction Mn 0.25 Cd 0.75 S/Co 3 O 4 may be a promising candidate for efficient energy conversion.
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JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2024
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IF 11.2
Xiaodong Yang,Haochen Shen,Xiaoming Xiao,Wei Yang,Zhichao Li,Na Yang,Luhong Zhang
In this work, P and Mo dual-doped CoNiS (PMo-CoNiS) nanosheet arrays were successfully constructed through a common solvothermal treatment. The precise doping of P and Mo species into the CoNiS can regulate the microstructures and meanwhile endow with PMo-CoNiS abundant amorphous/crystalline heterointerfaces, which can adjust the electronic structure, thus enhancing the intrinsic activity of hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). As a result, ultra-low overpotentials of merely 156 and 58 mV are required to deliver a current density of 10 mA cm −2 for OER and HER, respectively, and the electrocatalysts PMo-CoNiS also exhibit low Tafel slopes and maintain robust stability for 48 h in alkaline media at a high current density of 50 mA cm −2 . In addition, in an assembled electrolyte cell for overall water splitting, a voltage as low as 1.48 V is sufficient to yield a current density of 10 mA cm −2 . Density functional theory (DFT) calculations further confirmed that the enhanced OER and HER result from the optimized OH* and H* adsorption energy of PMo-CoNiS due to P, Mo dual doping and generated interfacial effect. This work may offer an avenue for designing low-cost bifunctional catalysts with superior catalytic activity and provide a new application strategy for broader applications in various electrocatalytic fields.
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SURFACE & COATINGS TECHNOLOGY
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2024
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IF 5.3
Zhigao Ma,Bingyan Jiang,Dietmar Drummer,Lu Zhang
An electrolyte solution incorporating sodium saccharin and an alkynyl compound was provided to electroform Ni-P-PTFE mold inserts with both low internal stress and good self-lubricating properties. The results showed that with 5 g·L −1 sodium saccharin and 1 mL·L −1 alkynyl compound, the internal stress reached a minimum of −114 MPa, an 82 % reduction from the −646 MPa observed without additives. The presence of sodium saccharin and alkynyl compound in the electrolyte solution reduced the hydrogen evolution reaction current from 15.2 to 12.9 mA at the operating cathode potential of −1 V and decreased the RTC (111) from 100 % to 90 %. The reduction of internal stress in the electrodeposited Ni-P-PTFE composites was attributed to the decreased hydrogenation strain, diminished Ni (111) texture intensity, and the partial incorporation of alkynyl compound reaction products into the deposits, which weakened the connections between crystallites. Finally, 5 g·L −1 sodium saccharin and 1 mL·L −1 alkynyl compound was applied to electroform Ni-P-PTFE mold insert with micro features. Only slightly pile-up defects at the corner of grooves were observed on the polymer chips demolded from Ni-P-PTFE mold insert, demonstrating its good self-lubricating property.
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PHYSICAL CHEMISTRY CHEMICAL PHYSICS
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2024
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IF 2.9
Jianshuai Mu,Mengjiao Ren,Ning Li,Tengyi Zhao,Zhongyi Liu,Jingwen Ma,Shulai Lei,Jiajun Wang,En-Cui Yang,Yan Wang
In recent years, great progress has been made on nanozymes with enzyme-like properties. Here, bimetallic Fe and Ni nanoclusters were anchored on the nanosheets of nitrogen-rich layered graphitic carbon nitride by one-step pyrolysis at high temperature (Fe/Ni-CN). The loading content of Fe and Ni on Fe/Ni-CN is as high as 8.0%, and the Fe/Ni-CN has a high specific surface area of 121.86 m²/g. The Fe/Ni-CN can effectively oxidize 3, 3', 5, 5'-tetramethylbenzidine (TMB) in the presence of H2O2, and exhibits efficient peroxidase-like activity, leading to a 17.2-fold increase compared to pure graphitic carbon nitride (CN). Similar to the natural horseradish peroxidase (HRP), the Fe/Ni-CN nanozyme follows the catalytic kinetic.The Michaelis-Menten constant (Km) value of Fe/Ni-CN nanozyme for TMB is about 8.3-fold lower than that of HRP, which means that Fe/Ni-CN nanozyme has better affinity for TMB. In addition, the catalytic mechanism was investigated by combination of free radical quenching experiments and density-functional theory calculations (DFT). The results show that the high peroxidase-like activity is due to the easy adsorption of H2O2 after bimetal loading, which is conducive to the production of hydroxyl radical. Based on the extraordinary peroxidase-like activity, the colorimetric detection of p-phenylenediamine (PPD) was constructed with a wide linear range of 0.2 - 30 μM and a low detection limit of 0.02 μM. The sensor system has been successfully applied to the detection of residual PPD in real dyed hair samples. The results show that the colorimetric method is sensitive, highly selective and accurate. This study provides a new idea for the efficient enhancement of nanozyme activity and effective detection of PPD by bimetallic synergistic strategy.
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PubMed
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Nano Energy
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2025
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IF 17.1
Wenpei Zhao,Qiuyu Liu,Ziyang Tian,Daqing Ma,Wenrui Li,Shuhong Wang,Yuting Xie,Jingqiao Zheng,Huiyuan Huang,Xiya Yang,Yantao Shi,Bing Yin,Yudi Wang
CsPbBr 3 perovskite has become a star material for triboelectric nanogenerators (TENGs) due to its excellent optoelectronic properties, dielectric properties and stability in the atmosphere. However, regulating its optoelectronic and dielectric properties through charge-directed transport and separation within TENGs has not been comprehensively explored. Herein, p-n junction is constructed to form built-in potential ( E built-in ) for charge-directed transport by introducing a semiconductor layer beneath the perovskite film in perovskite-TENGs, where the effect of E built-in ’s direction and intensity on output performance is systematically investigated. Introducing the p-type semiconductor NiO x creates a reversed E built-in , which enhances the surface triboelectric charge density of the perovskite and achieves improved triboelectric output performance of 205 V and 43 μA cm −2 for the PVDF-CsPbBr 3 TENG. Conversely, the n-type semiconductor SnO 2 establishes a parallel E built-in , greatly facilitating the extraction and separation of photogenerated carriers, leading to a high current density of 1.4 mA cm −2 under illumination based on the triboelectric-photoelectric coupling effect. Moreover, the CsPbBr 3 -TENGs demonstrate superior stability and a broad linear response range and fast photoresponsivity, proving their potential for practical applications in various self-powered optoelectronic detection devices.
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DALTON TRANSACTIONS
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2024
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IF 3.5
Ziyi Chen,Xiaomin Zhang,Qiwei Duan,Guangming Wang,Shuchun Li,Kaihua Yu,Changsheng Cao,Zailai Xie
Non-metallic heteroatom-doped carbon materials are promising catalysts for the oxidative dehydrogenation of propane (ODHP), but their controlled synthesis remains challenging. Herein, a novel three-dimensional N, P co-doped carbon nanosheet (NPC-NS-T) catalyst is prepared, which shows an impressive catalytic performance in the ODHP reaction with high propane conversion (20.0%) and high selectivity for propene (62.1%) and olefins (64.5%) at 500 °C along with good long-time stability. Comprehensive experimental characterizations revealed that incorporation of appropriate P can not only help to form more CO species on the surface of NPC-NS-T but also inhibit the consumption of CO species under ODHP conditions, thereby remarkably improving the catalytic performance. This work could pave the way for developing efficient biomass-derived carbon catalysts for the oxidative dehydrogenation reactions of propane.
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PubMed
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EUROPEAN POLYMER JOURNAL
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2025
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IF 6.3
Jinbiao Zhao,Huimin Duan,Xinxin Xu,Shangchao Ji,Hao Yang,Zhichao Huang,Qi Zhong,Dongming Qi
Reactive polyurethane (RPU) films in a solvent-free medium exhibit exceptional stability and mechanical properties due to their highly cross-linked structure. Achieving inherent fire resistance, waterproofing, and high mechanical performance in RPUs is challenging. Here, we prepared an intrinsic flame retardant, waterproof, and flexible RPU using a P/Si synergistic system with hydroxylated ammonium polyphosphate aAPP/Si-RPU via in-situ polyaddition of NCO-double capped prepolymer and polyol components, including polydimethylsiloxane (PDMS) and aAPP. The aAPP was synthesized through cation exchange between diethylene glycol amine (DGA) and ammonium polyphosphate (APP). Compared to pure RPU, aAPP/Si 15% -RPU showed a 60.3 % reduction in peak heat release rate (pk-HRR) and a 14.1 % reduction in total heat release (THR), with the limiting oxygen index (LOI) increasing from 18.2 % to 27.8 %. Mechanical properties and hydrophobicity improved, with tensile strength at 31.9 ± 1.9 MPa, elongation at break at 522.7 ± 20.3 %, and a water contact angle of 127.1°. The balance of properties was due to ordered microphase separation from the organic–inorganic hybrid structure of aAPP and PDMS, where aAPP particles enhanced microstructure and crosslinked interactions, and the Si-O bond in PDMS provided flexibility and water resistance. This study presents a strategy to resolve the conflict between rigidity and toughness, offering design ideas for intrinsic flame retardant polyurethane.
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