INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2023
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IF 7.2
Xiao Xu,Yucheng Dong,Fangfang Liu,Hui Wang,Xuyun Wang,Xiaoyuan Li,Jianwei Ren,Rongfang Wang
Electrochemical urea electrolysis holds great potential for energy-efficient hydrogen production and wastewater treatment . However, developing cost-effective and highly active catalysts remains a challenge. In this study, a novel bifunctional electrocatalyst of Ni–Zn bimetallic nanosheets (ZnO–Ni 2 P) was synthesized on Ni foam (NF) for efficient urea decomposition in urea-containing wastewater. The results showed that inactive ZnO phase acted as an "electron pump", which facilitated electron redistribution between Ni and P atoms and created localized vacancies of Ni and P cations. This optimized electronic configuration enhanced the kinetics of both the urea oxidation reaction (UOR) and hydrogen evolution reaction (HER). Additionally, a unique particle-porous structure with abundant grain boundaries was achieved through the utilization of the Kirkendall Effect and Ostwald Ripening . In an alkaline urea electrolysis system , the alkaline urea electrolyzer assembled with ZnO–Ni 2 P/NF sample as both electrodes exhibited a low driving potential of only 1.424 V to achieve a current density of 10 mA cm −2 , which outperformed the commercial noble metal-based electrolyzer (RuO 2 ||Pt/C). The results verify that incorporating an inactive phase to manipulate the electronic structure of the active phase can be an effective strategy in developing catalysts for urea electrolysis.
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JOURNAL OF FOOD COMPOSITION AND ANALYSIS
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2023
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IF 4.3
Yang Li,Ling Ling,Chuan-Fan Ding
Human milk oligosaccharides (HMOs), the third most abundant components in breastmilk, show high structural diversity with many isomers. Here, we proposed a trapped ion mobility spectrometry-mass spectrometry (TIMS-MS) strategy for the differentiating and isomer-specific quantification of HMOs combined with Girard reagent P-d 0 /d 5 (GP-d 0 /d 5 ) derivatization . Three functional HMO isomer pairs including LNT/LNnT, 3'-SL/6'-SL, and 2'-FL/3'-FL were investigated by the proposed method. The GP-derivatized HMO isomers showed enhanced ionization efficiency (8-fold) and achieved mobility separation with ΔCCS % ≥ 3.7% in TIMS-MS. With the GP-d 5 derivatized HMOs as an internal standard, HMOs in real samples could be quantified by derivatization with GP-d 0 , and each isomeric species could be further determined based on their corresponding mobility peaks. The recoveries of spiked HMOs are obtained at 72.4 − 109%. Thus, an isomer-specific quantification strategy for HMO isomers was developed based on the GP-d 0 /d 5 derivatization and TIMS-MS.
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Journal of Cleaner Production
·
2023
·
IF 11.1
Zeying Yang,Boyong Cao,Yi Cao,Xiaowei An,Xiyan Yue,Guoqing Guan,Yanhao Zhang,Baoxian Ye,Zhengkun Xie
Emerging contaminant N-(1,3-dimethylbutyl)-N′-phenyl-p-phenylenediamine has caused severe threats to ecosystems, necessitating the development of highly sensitive detection methods. Herein, a reliable and ultra-sensitive electrochemical sensor based on a carbon paste electrode modified by hexagonal wurtzite zinc oxide was developed for selective determination and degradation of N-(1,3-dimethylbutyl)-N′-phenyl-p-phenylenediamine. Experimental results demonstrated the successful application of the sensor for detecting N-(1,3-dimethylbutyl)-N′-phenyl-p-phenylenediamine in soil samples. The contaminant contents were found to be 1.46–24.68 nmol L −1 in Zhengzhou City and 1.99–11.3 nmol L −1 in Pingdingshan City, respectively, along with a satisfactory recovery rate. Density functional theory calculations revealed that the hexagonal wurtzite zinc oxide crystal significantly decreased the activation energy of catalytic conversion compared to cubic sphalerite , resulting in a notable improvement in sensor response. Cryogenic electron microscopy technique further confirmed that the electrocatalytic degradation product of N-(1,3-dimethylbutyl)-N′-phenyl-p-phenylenediamine was not toxic N-(1,3-dimethylbutyl)-N′-phenyl-p-phenylenediamine quinone . Under optimal analysis conditions, the sensor achieved widely low as well as high linear ranges (0.1–800 nmol L −1 and 0.9–20 μmol L −1 ) with a low detection limitation (33 pmol L −1 ), indicating that such a highly sensitive and cost-effective electrochemical sensor has the potential for environmental pollutants monitoring .
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Journal of Materials Chemistry A
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2023
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IF 11.9
Luyao Zheng,Cong Liu,Wenbiao Zhang,Boxu Gao,Tianlan Yan,Yahong Zhang,Xiaoming Cao,Qingsheng Gao,Yi Tang
To design and build effective electrocatalysts for water splitting is a key challenge, but hardly any non-noble metal catalysts can match the performance of Pt at cathodes and Ir or Ru at anodes. The synergistic combination of non-noble metal catalysts could be a better option for overall water splitting (OWS). Herein, a heterostructured electrocatalyst of MoP/CoMoP2 nanoparticles embedded in N, P-doped carbon matrix (MoP/CoMoP2@NPC) was fabricated via reticular chemistry. Results indicate that, due to the cooperative effect of MoP/CoMoP2 interfaces and phosphorous vacancies, MoP/CoMoP2@NPC shows the extraordinarily efficiency and robust stability for hydrogen/oxygen evolution reactions and OWS in a wide pH range. This work could offer a promising interface-engineering approach to develop and build effective cooperative electrocatalysts for the sustainable production of hydrogen.
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JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2023
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IF 10.9
Xusheng He,Chao Xiao,Huichao Du,Yanyan Wang,Xin Ding,Kang Zheng,Meng Xue,Xingyou Tian,Xian Zhang
Poly(p-phenylene-2,6-benzobisoxazole) (PBO) fiber and polytetrafluoroethylene (PTFE) resin have been widely acknowledged as excellent wave-transparent materials for future high-frequency applications due to their exceptional dielectric properties. However, the weak interfacial bonding between these two materials hampers their full potential. In this study, we successfully addressed this limitation by enhancing the surface roughness of PBO fibers and introducing active sites through the in-situ grafting of silica nanowires. The added silica acted as an interfacial anchor on the PBO fiber surface, significantly improving the bonding force between PBO and PTFE. PBO/PTFE wave-transparent laminated composites were fabricated using hot compression molding. The results demonstrate that the PBO (treated with in-situ grown silica)/PTFE laminated composites exhibit superior interlaminar shear strength (ILSS), flexural strength, flexural modulus, and tensile modulus compared to the pristine PBO/PTFE laminated composites. Specifically, these properties are found to be 58.6%, 32.9%, 138.1%, and 25.35% higher, respectively. Additionally, these composites demonstrate low dielectric constant and dielectric loss. Most notably, they achieve a wave transmittance of 91.45% at 10 GHz, indicating significant potential for wide-range applications in next-generation advanced military weapons, such as “lightweight/high-strength/wave-transparent” electromagnetic window materials, as well as civilian communication base stations.
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APPLIED ENERGY
·
2023
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IF 11.2
Shuang Liu,Limin Ma,Cheng Zhen,Dan Li,Yishu Wang,Qiang Jia,Fu Guo
Bismuth telluride-based thermoelectric (TE) devices were widely used in waste heat recovery due to their high thermoelectric figure of merit (ZT), but the severe diffusion between Sn-based solder and TE pillar generated porous and brittle Sn-Te intermetallic compound (IMC), which seriously restricted the reliable service of devices. Ni-based coating was used but the thick Ni-Te IMC also impaired the properties of TE pillars. In this work, the crystalline Co-P coating was inserted between the p-type TE material Bi 0.5 Sb 1.5 Te 3 and the solder by electrodeposition, and the power generation sustainability of the TE pillar were significantly improved, and the mechanism was revealed. The microstructural characterization proved that the Co-P coating could effectively resist the diffusion of active Sn, Bi, Sb, Cu atoms. Co-P coating would provide support for the structural integrity and performance sustainability of TE pillars. It was worth noting that an ultrathin CoTe 2 IMC layer was formed between the Co-P coating and the Bi-Sb-Te pillar, which was much thinner than the Ni-Te IMC layer reported in the literature. This indicated that Co-P only consumed little thermoelectric elements, but also a good metallurgical bond was formed between the Co-P and the Bi-Sb-Te. After aging at 423 K for 150 h, the maximum output power and average Seebeck coefficient of the TE pillar without coating dropped significantly by 74% and 34%, respectively, and the internal resistance rose by 67%. Remarkably, the maximum output power and average Seebeck coefficient of the TE pillar protected by the Co-P coating only decreased by 14% and 5%, respectively, and the internal resistance only increased by 6%.
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JOURNAL OF POWER SOURCES
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2023
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IF 9.2
Peng Wang,Tao Yu,Liping Hao,Xuanwen Liu
Efficient electrocatalysts are crucial for overcoming the sluggish kinetics of the oxygen-evolution reaction (OER) and facilitating the advancement of energy storage technologies such as metal-air batteries and hydrogen production through water electrolysis. This study proposes a synergistic approach combining amorphization and interfacial engineering to improve OER performance by fabricating heterojunctions between crystalline NiFe(OH) x and amorphous NiP x . The formation of a strongly coupled crystalline-amorphous heterojunction enables optimization of the electronic structure at the catalytic site and accelerates charge transfer at the interface, thereby improving the reaction kinetics. Notably, we investigate the dynamic adsorption behavior of PO 4 3− during the OER process by introducing Na 3 PO 4 into the electrolyte, revealing that P vacancies serve as active sites in promoting OER activity. Lastly, electrochemical measurements demonstrate that NiFe(OH) x /NiP x /NF exhibits a low overpotential of 220 mV at 10 mA cm −2 and Tafel slope of 35 mV·dec −1 , surpassing the performance of laboratory-prepared noble metal catalysts and most reported NiFe-based electrocatalysts.
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JOURNAL OF HAZARDOUS MATERIALS
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2023
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IF 13.6
Xu Zhang,Zifang Peng,Shijiao Hou,Qiannan Sun,Hang Yuan,Dan Yin,Wenfen Zhang,Yanhao Zhang,Jianwei Tang,Shusheng Zhang,Zongwei Cai
p -Phenylenediamine (PPD) antioxidants are heavily used for protection of commercial rubber products (e.g., vehicle tire), resulting in their widespread contamination in ecosystem. PPD-quinones (PPDQs), the toxic quinone derivatives of PPDs, are also discovered as novel environmental pollutants. However, the contamination characteristics of PPDs/PPDQs in fresh atmospheric snow (without deposition on the Earth surface) have seldom been studied. This work first reports the broad distributions of PPDs and PPDQs in fresh atmospheric snow collected from seven Chinese urban areas. Individual median values of detected concentrations were in the ranges of 0.4 to 260 pg g −1 (PPDs) and 0.7 to 104 pg g −1 (PPDQs). The concentration deviation by long-term deposition on the ground was eliminated. In most sampling regions, wearing of vehicle rubber tires was possibly responsible for spatial-dependent PPDs’ pollution level variations, and high concentrations of PPDs promoted PPDQs’ formation in snow from atmosphere. Yet, excessive O 3 may further oxidize and reduce PPDQs in atmospheric fresh snow from Zhengzhou, which is different from previous research. Furthermore, snowfall was noticed might amplify concentrations of three PPDs and PPDQs in an inland lake, which possibly worsen corresponding pollution in water system. Current study elucidates the potential impacts of snow-bound PPDs/PPDQs on ecosystems should not be underestimated.
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PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2021
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IF 3.764
Beibei Wang,Dongyun Chen,Najun Li,Qingfeng Xu,Hua Li,Jinghui He,Jianmei Lu
A unique Prussian blue analog-derived three-dimensional (3D) hollow Ni–Co bimetal oxide compound supported on two-dimensional (2D) g-C3N4 nanosheets was successfully prepared using a low-temperature annealing method. A spatial conductive frame was formed owing to formation of a p–n heterojunction between the Ni–Co bimetallic oxide and g-C3N4, which accelerated photogenerated carrier migration and inhibited recombination. The hollow Ni–Co bimetallic oxide had pores that allowed facile gas circulation. After g-C3N4 recombination, the synergistic effect of the two catalysts degraded NO (600 ppb) under visible light with an extremely high conversion rate of up to 59.1%. Cycling experiments and X-ray diffraction results confirmed the stability of the composite catalyst, which has broad application prospects in environmental science.
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JOURNAL OF POLYMER RESEARCH
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2021
·Vol. 28
·期 11
·1-13
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IF 3.097
Liu Yuhang,Wen Youyi,Xu Weiwei,Li Bo,Song Zhimei,Li Yuyao,Xia Fang
The research on film capacitors with high energy density ( \({U}_{e}\) ) has attracted great attention in these years, due to their applications in modern electric system. However, the low \({U}_{e}\) is the major limitation for decreasing the size and weight of ferroelectric film capacitors. In this research, in order to improve the breakdown strength ( \({E}_{b}\) ) and dielectric constant at the same time, P(VDF-HFP) based ternary nanocomposites were prepared by using edge-hydroxyl boron nitride nanosheets (EOH-BNNSs) with high \({E}_{b}\) and the third phase filler with high dielectric constant. Three fillers with dielectric constant from large to small, namely, barium titanate (BT), titanium dioxide (TO), alumina (AO) were added into P(VDF-HFP)/EOH-BNNSs nanocomposites, respectively. The \({E}_{b}\) , dielectric constsnt, dielectric loss, \({U}_{e}\) , thermal conductivities and mechanical properties of the ternary nanocomposites were thoroughly investigated. The results indicate the local electric field concentration has great influence on the \({E}_{b}\) of ternary nanocomposites. However, with low filler loading, the synergy effect and weak local electric field concentration can not only improve the dielectric constant but also the \({E}_{b}\) , finally achieving the best \({U}_{e}\) . The easy preparation process and high \({U}_{e}\) have endow the ternary nanocomposites with great potential application in film capacitors.
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JOURNAL OF APPLIED POLYMER SCIENCE
·
2020
·Vol. 138
·期 3
·49697
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IF 2.52
Xiaoqiang Jin,Huihong Jiang,Fenghui Qiao,Weipin Huang,Xiaojiong Bao,Zhengke Wang,Qiaoling Hu
Conductive hydrogels have attracted a myriad of interest due to their potential applications for human motion monitoring, personal healthcare diagnosis and so forth. However, fabrication of hydrogel-based strain sensors integrating with ultrastretchability, adhesiveness, strain sensitivity, biocompatibility, and self-cleaning function is still a challenge. Herein, a new type of semi-interpenetrating multifunctional hydrogels, which integrated all above practical features magically were prepared via a facile one-pot in-situ radical copolymerization method. Thereinto, [2-(methacryloyloxy) ethyl] dimethyl-(3-sulfopropyl) ammonium hydroxide (SBMA) and acrylamide (AAm) copolymers cross-linked by N , N ′-Methylenebisacrylamide (MBAA) served as the soft and functional matrix, whereas alginate was employed as the enhanced component. The transparent zwitterionic hydrogels had a max elongation and ionic conductivity of 1353% and 0.15 S/m, respectively. They could adhere onto various surfaces, including steel, glass, skin, and rubber. The repeatable adhesiveness, linear strain sensitivity within 0%–250% tensile strain and 0%–30% compressive strain provided remarkable working range and using stability. What's more notable was that the biocompatibility and self-cleaning function tested by MTT, live/dead assay, allergy patch tests, and plate colony-counting method imparted great possibility of practical application for strain sensors to hydrogels from a biological point of view.
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Waste and Biomass Valorization
·
2020
·Vol. 12
·期 6
·3271-3286
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IF 2.851
Sajid Muhammad,Bai Yuchen,Liu Dehua,Zhao Xuebing
Abstract Hydroxymethylfurfural (HMF) has been considered as one of the most promising biomass derived precursors for producing bio-based materials. Lewis acids are usually used to facilitate the isomerization of glucose to fructose in order to improve the HMF yield. In this study, glucose was converted to HMF with p -toluenesulfonic acid ( p TSA) and chlorides as Brønsted and Lewis acids catalysts in the DMSO medium at 120 °C under atmospheric pressure. Kinetic modeling of the process was investigated with consideration of glucose isomerization, dehydration of fructose, rehydration of HMF and formation of humin. NH 4 Cl was screened as the most efficient co-catalyst for glucose conversion with HMF yield of 47%. The developed model could be well used to simulate the process with satisfying goodness of fit. The activation energies for glucose isomerization, condensation, dehydration of fructose, and rehydration of HMF were determined to be 39.8, 18.1, 55.2, and 19.0 kJ/mol, respectively. However, because the fructose concentration was very low and the reaction rate of fructose dehydration was much higher than that of glucose isomerization, a pseudo-steady state assumption could be employed, by which the observed activation energy for a lumped reaction of glucose to HMF conversion ( E HMF ) was determined as 45.6 kJ/mol. The developed observed kinetic model could be well used to describe the kinetics of p TSA and chloride co-catalyzed conversion of HMF. Isomerization of glucose to fructose, condensation of glucose to form humin, dehydration of fructose to form HMF, and rehydration of HMF to LA were the major reactions in the system. To improve the HMF selectivity, efforts should be made to reduce the rate of glucose condensation to form humin Graphic Abstract
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危险品化学品经营许可证（带存储）