INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
·
IF 8.5
Guilong Yan,Xinrong Zhou,Shijie Ding,Yuzhen Zhou,Jianguo Wu,Ci Jin,Wei Wang
A countercurrent pretreatment strategy using p -toluenesulfonic acid (TsOH) was developed to improve the fractionation and enzymatic hydrolysis of corncob. Four pretreatment solvents were evaluated, and 50 % TsOH with three countercurrent pretreatment cycles showed the highest efficiency. After pretreatment, the cellulose content of the pretreated corncob increased to 76.7 %, and the removal of hemicellulose, acid-soluble lignin (ASL) and acid-insoluble lignin (AIL) was 88.1 %, 63.8 %, and 90.9 %, respectively. Subsequent enzymatic hydrolysis yielded an enzymatic digestibility of 79.1 % and a glucose recovery of 76.4 %. Structural analyses by SEM, XRD, and FTIR confirmed biomass deconstruction and cellulose enrichment. HSQC NMR analysis demonstrated that the recovered lignin was enriched in H-type units, suggesting promising potential for high-value valorization. This mild and effective TsOH countercurrent pretreatment provides a sustainable approach for lignocellulosic biorefining with strong prospects for industrial application.
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Shumin Li,Jun Tan,Zhejun Jiang,Jin Wang,Zhengquan Li
Dye-sensitized systems show promising in photocatalysis because they can separate the tasks of light absorption, charge generation and surface catalysis to two coupled components. In this system, it is crucial to develop suitable catalysts capable of receiving dye-injected charges and having high activity to a given reaction. Aiming to photocatalytic H 2 and O 2 production, we present a metal-organic framework derived route to prepare bimetallic Fe-Ni-P nanotubes using Fe-Ni-MIL-88 nanorods as templates. When integrated with different dyes, these Fe-Ni-P nanotubes can serve as efficient catalysts for photocatalytic H 2 and O 2 production, respectively. Additionally, catalytic activities of such dye-sensitized systems can be conveniently regulated by tailoring the metal compositions in Fe-Ni-P nanotubes. The photocatalytic H 2 production of Fe 1 -Ni 2 -P can reach 5420 μmol g cat −1 h −1 under eosin-Y sensitization, which is 24 times and 6.7 times higher than Fe 2 P and Ni 2 P, respectively. The photocatalytic O 2 production of Fe 1 -Ni 2 -P can reach 900.3 μmol g cat −1 h −1 under [Ru(bpy) 3 ]Cl 2 sensitization, about 4.6 times and 2.9 times higher than Fe 2 P and Ni 2 P. The roles of different components in the system have been explored and corresponding working mechanism is proposed. This work demonstrates a new type of dye-sensitized systems consisting of bimetallic phosphides and provides a facile route to regulate their photocatalytic performance.
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高影响因子
APPLIED CATALYSIS A-GENERAL
·
2016
·
IF 4.012
Zhen Dong,Tao Wang,Jie Zhao,Teng Fu,Xuefeng Guo,Luming Peng,Bin Zhao,Nianhua Xue,Weiping Ding,Zaiku Xie
The hydrogenation of nitrobenzene (NB) in acid medium is regarded as the most promising route to prepare p- aminophenol (PAP). The noble metals such as Pt have been reported as commercial catalysts but base metals are inactive due to strong acids needed in the reaction medium. Therefore, Ni-based catalyst has been attempted using solid acids, however, the results are not attractive. In this work, in order to improve the acid-resistance of Ni in sulfuric acid, we insert Si into the Ni crystal structure to form Ni-silicides. The as-prepared supported Ni-silicides nanoparticles exhibit excellent acid-resistance and perform high activity and selectivity of the entitled reaction. NiSi 2 nanoparticles supported on acid-treated active carbon are highly active and selective to convert NB to PAP in sulfuric acid. The XPS measurements show that the Ni in the Ni-silicides donates electrons to silicon, but the Ni valence is still far lower than nickel oxide, which causes its stability in acids and the activity to hydrogen activation is partially reserved. Thus, the catalysts exhibit excellent stability in alloy structure, morphology, and catalytic performance in reuses, suggesting the Ni-silicides nanoparticles as the promising substitute for precious metal for PAP manufactures.
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高影响因子
Journal of Water Process Engineering
·
2020
·
IF 3.465
Xingyu Wu,Xingfu Song,Hang Chen,Jianguo Yu
Electrochemical oxidation process (EOP) has received attentions in wastewater management in recent years. However, high electrodes cost and low current efficiency have challenged the industrial application. Therefore, dimensional stable anodes (DSA) are developed due to relative low price and high efficiency of chlorinated active species generation. However, with low concentration of mediums, the direct oxidation still plays the main role in the organic pollutants degradation, resulting in low current efficiency of process. Thus, in this study, the impact of general operating conditions including type of electrolyte, active species addition, pH and current density on proportion of direct and indirect oxidation during p- nitrophenol degradation in DSA system have been studied, trying to enhance the contribution of indirect oxidation. The contribution was measured by scavenging tests. It concluded that low pH and adding NaClO can improve the contribution of indirect oxidation, but extra H 2 O 2 significantly hindered the PNP degradation. Furthermore, we have studied the behaviors of free radical reactions by quantum chemical calculation. Three mechanisms including hydrogen atom transfer (HAT), radical adduct formation (RAF) and electron transfer (ET) were discussed in hydroxyl free radical and chlorine-derived radicals reactions. According to calculated thermodynamic and kinetic parameters, it indicated that active sites in primary reactions initiated by OH are significantly more than that in chlorine-derived radical reactions, corresponding to the differences of experimental phenomenon under different mediums. Degradation pathways and main byproducts formation were also proposed. We provided an insight to study oxidation mechanisms of EOP by means of experiments combining quantum chemical calculation.
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高影响因子
Processes
·
2025
·Vol. 13
·期 10
·3295
·
IF 2.8
Yinzhang Cheng,Xueting Bai,Zhenyu Lu,Ruijue Wang,Wei Wang,Ruizhou Guo,Yudong Xu,Zhipeng Lei
With the rapid development of communication, electronics, medical, and energy industries in modern society, film capacitors have garnered widespread attention and undergone significant growth. However, the low energy density (Ue) resulting from low breakdown strength (Eb) significantly limits the application of thin-film capacitors. In this work, we use a low-cost and effective dip-coating method to apply boron nitride (BN) layers onto the outer layers of poly(vinylidene fluoride-co-hexafluoropropylene)/barium titanate (P(VDF-HFP)/BT) composite films to prepare boron nitride-poly(vinylidene fluoride-co-hexafluoropropylene/barium titanate-boron nitride (BN-P(VDF-HFP)/BT-BN) composite films with a sandwich structure that exhibits extremely highEbandUe. The experimental results show that the sandwich-structured BN-P(VDF-HFP)/BT-BN films containing 7.5 wt% BT nanoparticles obtained 530 MV/mEband 18.12 J/cm3Ue, both of which are much higher than those of the corresponding monolayer films. In addition, the finite element simulation results show that the designed sandwich-structured films can reduce local field strength distortion, decrease leakage current, and suppress the development of breakdown channels, thereby significantly improvingEbandUe. In summary, this study presents a low-cost and effective method for enhancing the breakdown strength and energy density of thin-film capacitors.
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高影响因子
POLYMER DEGRADATION AND STABILITY
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2020
·
IF 4.032
Wei Tao,Xu Hu,Jinhao Sun,Lijun Qian,Juan Li
Two phosphorus-nitrogen flame retardants were synthesized by using chlodiphenylphosphine (CDP) or diphenylphosphinyl chloride (DPP) and cytosine (Cy), respectively. The products are marked as CCDP and CDPP, and characterized by using Fourier transform infrared spectra (FT-IR), 31 P and 1 H nuclear magnetic resonance and thermogravimetric analysis (TGA). The CCDP and CDPP were used to modify the flame retardancy of polyamide 6 (PA6). The results indicated that 6 wt% CCDP and CDPP both make PA6 achieve the UL-94 V-0 rating and improve its LOI value. The degradation behavior was studied by TG-IR, melt volume-flow rate, etc. The results revealed that both CCDP and CDPP promote the degradation of PA6 and improve its flame retardancy by melting away. The CCDP tends to work in the gas phase and the CDPP in the condensed phase. In addition, in order to reduce the effect of flame retardant on the mechanical properties of PA6, CDPP was coated with epoxy resin . The results showed that the flame retardancy decrease after coating. Finally, melamine cyanurate was blended with the CDPP coated by epoxy to adjust the comprehensive properties of PA6 composite, and excellent flame retardancy and mechanical properties are obtained.
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高影响因子
ACS Applied Energy Materials
·
2021
·
IF 6.024
Ya Xu,Yin Huang,Hang Zhong,Wenbo Li,Duoling Cao,Congqiang Zhang,Huaxi Bao,Zhiguang Guo,Li Wan,Xu Zhang,Xiuhua Zhang,Yuebin Li,Xianbao Wang,Dominik Eder,Shimin Wang
Methylammonium lead iodide perovskite (MAPbI3) demonstrates the disadvantage of poor long-term stability. Additive engineering is an effective measure to address this issue. We have successfully used an organic molecule called p-methylbenzoammonium iodate (p-MePMAI) as an additive to a perovskite precursor. Results showed that p-MePMAI is an excellent additive with functional groups of benzyl and ammonium ions that can improve the performance and stability of carbon counter electrode (CE)-based MAPbI3 perovskite solar cells. Benzene rings and ammonium ion functional groups of p-MePMAI can electrostatically interact with MAPbI3 when a proper amount of p-MePMAI is added. Moreover, the conjugated structure of the benzene ring can effectively reduce the number of trap states in the perovskite film and significantly inhibit nonradiative recombination, further promoting charge transport. The photoelectric conversion efficiency (PCE) of our prepared carbon CE-based MAPbI3 perovskite solar cells increases from 12.76 to 14.54% with the optimization of p-MePMAI. Notably, the device optimized using p-MePMAI additives maintains 85% of the initial PCE after 500 h.
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高影响因子
APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Qing Shao,Zhen Hu,Xirong Xu,Long Yu,Dayu Zhang,Yudong Huang
The composites with interfacial self-healing ability are smart and promising materials in the future. Although some approaches have been used to heal the micro-cracks in composite materials, it is still a great challenge to develop a versatile strategy to fabricate multifunctional interface for self-healing. Here, boron nitride nanosheets (BN) are immobilized onto PBO fibers by facile polydopamine (PDA) chemistry. Benefiting from the photothermal effect of BN-PDA, the obtained surface layer displays interfacial self-healing properties under Xenon light irradiation.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Shucan Qin,Qianqian Peng,Weizhen Kong,Rong Xue,Chongqing Xu,Jianming Shi,Yanrong Liu,Yunqian Ma
Integrating sulfide oxidation reaction (SOR) with hydrogen evolution reaction (HER) by electrochemical means to simultaneously valorize sulfion and produce hydrogen is an efficient cleaner production method. Currently, we reported on the fabrication of one succulent-like phosphorus-doped transition metal selenide bifunctional catalyst supported on nickel foam (P–CoSe/NF) for SOR and HER. The unique structure has a significant surface area that allows many active sites to be exposed, enabling the catalyst to have an excellent activity up to 100 mA cm −2 at only 0.362 V. The H 2 Faraday efficiency reaches 97.4% and the rate of sulfur evolution is 26.24 mg h −1 . The durability test demonstrates that the bifunctional catalyst possesses excellent anti-sulfur properties. The Density Functional Theory calculations demonstrate that phosphorus as a dopant is believed to confer an optimal electronic structure and local coordination environment by tuning d electron number. The calculate S 8 ∗ to S 8 was confirmed to have a low energy barrier, indicating the self-cleaning tendency caused by phosphorus doping. This work presents a promising approach utilizing anti-sulfur single-atom-doped transition metal selenide catalysts in electrochemical reaction, representing a significant advancement in achieving low-cost and high value-added using waste resources.
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高影响因子
ACS Applied Energy Materials
·
2025
·
IF 5.5
Henan Shang,Qi Jia,Sijia Li,Jinsheng Liang
The rational design of efficient and selective catalysts for formic acid (FA) dehydrogenation is critical yet challenging for the development of hydrogen-based energy applications. Herein, ultrafine trimetallic NiAuPd nanoparticles (∼1.65 nm) supported on nitrogen–phosphorus-doped graphene (NPG) with excellent dispersibility have been successfully prepared. Remarkably, the optimized Ni0.2Au0.2Pd0.6/NPG catalyst exhibits exceptional catalytic activity and robust stability for additive-free FA dehydrogenation at 303 K, achieving 100% hydrogen selectivity and an unprecedented initial turnover frequency (TOF) of 10053.96 mol of Pd–1 h–1. The significant enhancement in catalytic activity can be attributed to the synergistic effects, including the optimized electronic structure and improved electron transfer facilitated by Ni incorporation, the precise control of particle size and dispersion by NPG support, and the strong metal–support interaction (SMSI) between the NiAuPd nanoparticles and the NPG substrate. Density functional theory (DFT) calculations further confirm that the optimal electronic environment induced by Ni incorporation promotes the rearrangement of H–COO* intermediates and reduces energy barriers (Ebar), thus enhancing the catalytic activity. This work provides a cost-effective strategy for designing high-performance catalysts and promoting hydrogen storage technologies.
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DOI
高影响因子
CELLULOSE
·
2024
·Vol. 31
·期 6
·4007-4023
·
IF 4.9
Xue Tong,Ma Ruijie,Zhang Xintian,Tao Wenwen,Wang Chaoxia,Yin Yunjie
Personal thermal management (PTM) textiles with heating or cooling capabilities are highly attractive because they offer individual comfort and contribute to lower energy consumption. However, due to the subjectivity of thermal comfort, developing adaptive and personalized PTM textiles remains a challenge. Here, we report a thermoresponsive cotton fabric (PMOG-cotton), which is prepared by a combination of ultraviolet-induced free radical polymerization and pad-dry-cure process. 2-(2-methoxyethoxy)ethyl methacrylate (MEO 2 MA) and oligo(ethylene glycol) methacrylate (OEGMA 475 ) are selected as thermoresponsive monomers, while glycidyl methacrylate (GMA) is chosen as the linking monomer for copolymerization. The lower critical solution temperature (LCST) of P(MEO 2 MA-co-OEGMA 475 -co-GMA) can be precisely regulated by adjusting the dosage of OEGMA 475 . Furthermore, PMOG-cotton demonstrates a reversible transition between hydrophobic and hydrophilic states in response to variations in external temperature (T > LCST, hydrophobic; T < LCST, hydrophilic). This transition can be sustained for a minimum of 5 cycles and 50 rubbing cycles. PMOG-cotton exhibits superior control over breathability and moisture permeability compared to raw cotton in response to temperature fluctuations. Compared to raw cotton, PMOG-cotton offers a 2.4 °C heating effect in cold environments and a 1.3 °C cooling effect in hot environments. This adaptive thermal management textile shows promise for delivering human thermal comfort in complex and dynamic environments.
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高影响因子
Advanced Energy Materials
·
2019
·Vol. 9
·期 12
·1802595
·
IF 24.884
Qin Zhou,Lusheng Liang,Junjie Hu,Bingbing Cao,Longkai Yang,Tingjun Wu,Xin Li,Bao Zhang,Peng Gao
Supported by the density functional theory (DFT) calculations, for the first time, a fluorinated aromatic cation, 2-(4-fluorophenyl)ethyl ammonium iodide (FPEAI), is introduced to grow in situ a low dimensional perovskite layer atop 3D perovskite film with excess PbI 2 . The resulted ( p -FC 6 H 4 C 2 H 4 NH 3 ) 2 [PbI 4 ] perovskite functions as a protective capping layer to protect the 3D perovskite from moisture. In the meantime, the thin layer facilitates charge transfer at the interfaces, thereby reducing the nonradiative recombination pathways. Laser scanning confocal microscopy unveils visually the distribution of the 2D perovskite layer on top of the 3D perovskite. When employing the 3D–2D perovskite as the absorbing layer in the photovoltaic cells, a high power conversion efficiency of 20.54% is realized. Superior device performance and moisture stability are observed with the modified perovskite over the whole stability test period.
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高影响因子
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