BIOMACROMOLECULES
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2025
·
IF 5.4
Zhuangzhi Gao,Yan Zhang,Huifang Zhao
To enable green valorization of agricultural waste-derived biomacromolecules, this study developed a diethylene glycol/glycerol (DEG/GI) binary solvent system under H3PO4 catalysis, investigating its synergistic liquefaction mechanisms and directional regulation potential for bio-oil production from corn stalk holocellulose (CSHC). Time-resolved analysis of solid, liquid, and gaseous phases elucidated depolymerization-polymerization mechanisms and product evolution. A unique DEG/GI synergy afforded 95.90% bio-oil in a yield of 95.90% within 40 min. During the depolymerization stage (0–40 min), CSHC depolymerization dominated, accompanied by high CO/CO2 release and a transient rise and eventual disappearance of crystallinity (CrI). While initial H+ consumption by GI esterification suppressed hemicellulose hydrolysis, the ensuing liquefaction products promoted cellulose conversion. Beyond 40 min, the bio-oil yield decreased and solid residue increased, indicating a shift toward condensation and repolymerization. This work unveils glycerol’s role in pathway regulation under mild conditions, offering a sustainable strategy for targeted conversion of holocellulose into bio-oil, with implications for producing functional biobased materials.
研究领域:
生物质转化
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绿色化学
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可再生能源
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催化
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可持续材料
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DOI
PubMed
高影响因子
Materials Today Communications
·
2026
·
IF 4.5
Wei Gan,Can Jiang,Yao Wang,Min Ling,Shengfu Zhang
It is challenging to develop well-designed photocatalysts with high activity. In this work, TiO 2 nanotubes (TiO 2 -NTs，TNT) with well-morphology and high {001} facets exposure ratio were directly synthesized by H 3 PO 4 /HF-assisted two-step anodic oxidation. The results show that the addition of 3 wt% H 3 PO 4 and 0.5 wt% HF into the electrolyte facilitates the preparation of TiO 2 -NTs with an average crack density of 0 % and {001} facets exposure ratios up to 80.00 %. Moreover, the PO 4 3- and HPO 4 2- in the anode effectively hinder the generation of electron current and release of oxygen bubbles on the surface of Ti substrate, which reduces the surface cracks of TiO 2 -NTs. The F - in the electrolyte is adsorbed on the {001} facets of the TiO 2 -NTs, which decreases the energy of the O-Ti-O, thus achieving the purpose of high {001} facets exposure ratio. Ultimately, the excellent optical properties, in conjunction with the synergistic effect of {001} facets-selective orientation and O V , significantly enhanced the photocatalytic activity of TiO 2 -NTs, resulting in the removal of 90.32 % Rhodamine B in 120 min under visible light illumination. This work could shed light on the new approach to the rational design of high-efficiency TiO 2 -NTs-based photocatalysts.
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DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2021
·
IF 4.464
Yuzhe Liu,Peihui Liu,Lin Li,Shaohui Wang,Zonglin Pan,Chengwen Song,Tonghua Wang
Biomass-based activated carbon materials provide a novel approach for the development of high-performance electrode materials for supercapacitors without the need for fossil fuel energy sources. Herein, activated carbon with an interconnected hierarchical architecture was designed and fabricated from hazelnut shells via H 3 PO 4 -assisted KOH activation. The results indicated that the activated carbon material with an interconnected pore framework was successfully fabricated and exhibited excellent electrochemical performance. The pore size distribution of the activated carbon could be tuned by the quantity of KOH that was added. A hierarchical architecture containing a gradient distribution from nanopores to micropores had the optimal connectivity and improved the electric double-layer capacitance and capacitance retention rate, while abundant heteroatoms on the surface or edges of the carbon matrix enhanced the pseudocapacitance. The highest specific capacitance was achieved 338 F·g −1 at a current density of 0.2 A·g −1 and the highest capacitance retention was 86.3% at 10 A·g −1 in a three-electrode system. The symmetrical capacitor (SC) device had an energy density of 16.42 W·h·kg −1 at a power density of 160 W·kg −1 in Na 2 SO 4 electrolyte. In Na 2 SO 4 gel electrolyte, the SC device exhibited a high energy density of 22.46 W·h·kg −1 at a power supply of 450 W·kg −1 and outstanding cycle stability with 133% of the initial capacity after 10,000 cycles in an operating potential of 1.8 V. This work provides an efficient strategy for the preparation of high-performance activated carbon electrodes from hazelnut shells.
研究领域:
材料科学
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能源技术
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DOI
高影响因子
CELLULOSE
·
2018
·Vol. 25
·期 6
·3459-3469
·
IF 3.809
Zhou Mengyao,Zhang Huihui,Qiao Yan,Li Chang Ming,Lu Zhisong
Abstract Textile-based flexible supercapacitors have attracted tremendous attention due to their great potentials in wearable electronics. It is highly desirable to develop facile methods, which are compatible with conventional textile industry, for the fabrication of high-performance and ultra-flexible textile-supported supercapacitors. Herein, a sandwich-structured supercapacitor with a poly(vinyl alcohol)/H 3 PO 4 -soaked cotton fabric as the electrolyte matrix, separator and supporting layer was prepared via screen-printing and transfer-printing techniques. Digital photographs and scanning electron micrographs were collected to verify the construction of the cotton fabric-sandwiched supercapacitor. The device possesses a gravimetric capacitance of 63.7 F g −1 at a current density of 1 A g −1 . After 2000 charging/discharging cycles, a capacitance retention of 85% could be achieved. The as-prepared supercapacitor can tolerate 100 times of bending or twisting with the capacitance maintaining at 89.7 and 93.3% of the original level, respectively. By designing the screen-printing mask, a squirrel-patterned supercapacitor was manufactured, showing that the proposed approach could combine both functionality and aesthetics. To demonstrate its feasibility, three in-series connected supercapacitors were produced on a T-shirt to light up a red lamp. This work may provide a facile approach to fabricating ultraflexible textile-based supercapacitors for potential applications in smart textiles and wearable electronics. Graphical Abstract
研究领域:
材料科学
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纺织工程
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能源技术
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2019
·
IF 3.131
Qun Jiang,Weiling Xie,Siyue Han,Yifan Wang,Ying Zhang
The corn straw-converted hydrochar (HC), HC modified with H 3 PO 4 (H 3 PO 4 -HC), and HC modified with polyethyleneimine (PEI) (PEI-HC) were prepared in this study for Pb(II) adsorption from an aqueous solution. SEM, TEM , XRD , Raman, FT-IR, BET and XPS analysis were carried out for the characterization of the as-obtained samples, and the Pb(II) adsorption capacities and mechanism onto them were analyzed. The results of SEM show that PEI loading on HC could cover the aggregates of the carbon spheres, altering the microscopic characteristic of HC. The lower I D / I G value of H 3 PO 4 -HC and no residual cellulose provided evidence to H 3 PO 4 -HC suffering a more thoroughly carbonization process than the original HC or PEI-HC. Both H 3 PO 4 -HC and PEI-HC exhibited excellent performance for Pb(II) adsorption with q max of 353.4 mg g −1 and 214.0 mg g −1 , respectively, which are significantly higher than the adsorption capacity (32.67 mg g −1 ) of the original HC. And the dominant Pb(II) adsorption process onto the as-fabricated HCs was attributed to chemical reaction revealed by the results of XPS analysis. After the adsorption process, the binding energies of C O and C O or NH / NH 2 and N in the as-prepared HCs have been shifted, confirming that the surface functional groups had taken part in the Pb(II) adsorption. The main adsorption mechanisms of Pb(II) on H 3 PO 4 -HC are the ions exchange and hydrogen bonding , and that of PEI-HC are the coordination bonding and hydrogen bonding. This study put forward in-depth views on the adsorption mechanism of the modified HCs. This facilitates the development of new and efficient adsorbents for the removal of heavy metals from water.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2022
·
IF 5.723
Ke Zhang,Yijie Su,Guiyun Wang,Daolai Sun,Satoshi Sato
Vapor-phase dehydration of 1,2-propanediol to form propanal was performed over H 3 PO 4 /SiO 2 catalyst with Brønsted acid sites, which exhibited a high activity for the formation of propanal , and the successive modification of H 3 PO 4 /SiO 2 by WO 3 and Ag could further improve both the activity and the stability of catalysts. The H 3 PO 4 /SiO 2 catalyst modified by both Ag and WO 3 could provide a propanal selectivity of 94.6% with a complete conversion of 1,2-propanediol in an H 2 flow at 250 °C and a weight hourly space velocity of 2.70 h −1 . Brønsted acid sites were effective for the formation of propanal, and the doping of WO 3 could significantly increase the amount of Brønsted acid sites, resulting in the improvement of catalytic activity. On the other hand, the doping of Ag could protect the Brønsted acid sites and inhibit coke deposition on the catalyst surface in an H 2 atmosphere, leading to the improvement of catalyst stability.
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DOI
高影响因子
BIOMASS & BIOENERGY
·
2025
·
IF 5.8
Qurshia Choudhry,Mengjiao Fan,Zahra Essa Khan,Baihong Li,Shu Zhang,Zanib Anwar,Muhammad Rashid,Xun Hu
Cracking is an essential route for creating porous structures in activation. Introducing an oxidant in activation induces oxidation reactions, which might strengthen cracking to create additional porous structures. To investigate the potential effect of O 2 on the development of activated carbon (AC) pore structures, poplar and lignin were activated with H 3 PO 4 at 400 °C in either a N 2 or O 2 atmosphere. The results demonstrated that polymerization reactions induced by H 3 PO 4 formed AC-poplar-N 2 with a much higher yield (52.3 %) than pyrolysis (27.6 %). However, the presence of O 2 substantially reduced the mass yield of AC-poplar-O 2 to 22.8 %. Unexpectedly, the oxidation reactions also decreased the specific surface area from 1783.3 m 2 /g in N 2 to 1099.1 m 2 /g in O 2 . This was due to the oxidation of aldehyde/ketone intermediates to carboxyl species, which are essentially inert in the polymerization catalyzed with H 3 PO 4 . Excessive oxidation in activating aliphatic-rich poplar was undesirable, but highly desirable for activating lignin to create pores. Lignin has rigid benzene ring structures, showing much higher resistivity towards oxidation, and thus, its presence did not affect the yield of the resulting AC. However, erosion of the skeleton of lignin from oxidation did take place, forming AC-lignin-O 2 of much larger specific surface area than AC-lignin-N 2 (933.9 versus 393.7 m 2 /g) and more mesopores (60 % versus 36 %) for more efficient adsorption of tetracycline. In-situ IR characterization of the activation process showed that the activation with O 2 presence formed more oxygen-containing species (i.e., -OH, C=O, and C-O-C). Still, polymerization played a less essential role than oxidation in forming porous structures with lignin as a feedstock.
研究领域:
化学工程
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材料科学
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环境科学
·
高分子科学
·
分析化学
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产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Wenyu Ma,Jiaxuan Fan,Xiaoyan Cui,Yujiao Wang,Yumei Yan,Zilin Meng,Haixiang Gao,Runhua Lu,Wenfeng Zhou
In this work, the adsorptive behavior of H 3 PO 4 -activated spent coffee ground (SCG) biochar (P-SCGB) were assessed for the removal of the 2,4-dichlorophenoxyacetic acid (2,4-D) herbicide from aqueous solutions. P-SCGB was produced via pyrolysis carbonization at 300 °C for 2 h and impregnated with H 3 PO 4 as a pretreatment . The characteristics of the biochar were implemented through the FTIR, SEM , XPS, XRD, N 2 adsorption/desorption curves and point of zero charge, which demonstrated that P-SCGB had a typical structure of amorphous materials and presented porous structure. It was found that the greatest removal efficiency of the 2,4-D occurs at pH 2 and adsorbent dosage of 0.75 g L −1 . The experimental adsorption data fitted well with the Elovich kinetic model and Freundlich isotherm model. Adsorption results indicated the maximum 2,4-D adsorption capacity of P-SCGB reached 323.76 mg g −1 , which was higher than most of 2,4-D adsorptive study. The thermodynamic behavior pointed to be exothermic and the magnitude of the adsorption enthalpy was in agreement with chemical adsorption . The reusability of adsorbent was also studied. Besides, our work also investigated and revealed the multiple mechanisms for 2,4-D adsorption. Over all, the study promoted the development of biochar preparation which act as an alternative adsorbent and its high adsorption uptake is proved to be beneficial for the advanced treatment of 2,4-D herbicide.
研究领域:
环境科学
·
农业科学
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DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2023
·
IF 2.6
Huiyu Zhao,Feng Wu,Qingwen Han,Chen Wang,Sibei Cao,Jiayu Ma
The solubility of potassium hexafluorosilicate (K2SiF6) in pure water and acid solutions (HCl and H3PO4) was conducted within a temperature range of 5–70 °C by the isothermal method. The stability of K2SiF6 in the systems above was also investigated by analyzing the equilibrium solids obtained in different conditions using X-ray diffraction (XRD), energy dispersive X-ray fluorescence (XRF), scanning electron microscope (SEM), and Fourier transform infrared (FT-IR). The results revealed that the solubility always increases with increasing temperature in all investigated systems. In the presence of hydrochloric acid and phosphoric acid, the solubility first increases and then decreases with the increase of acid concentration due to the increase of H+ concentration in hydrochloric acid, the effect of the stepwise dissociation of phosphoric acid, and the changed average ionic activity in solutions. K2SiF6 is stable in pure water and acid solutions. In addition, the experimental data were successfully correlated by the Apelblat empirical equation.
研究领域:
化学工程
·
材料科学
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产品关联
DOI
高影响因子
EUROPEAN POLYMER JOURNAL
·
2016
·
IF 3.485
Quan Yuan,Guo-Hua Sun,Ke-Fei Han,Jing-Hua Yu,Hong Zhu,Zhong-Ming Wang
A series of copolymers, which can also be regarded as ABPBIs containing phenoxyl in the main chain, were synthesized by copolymerization of two kinds of self-polycondensation monomers: 3,4-diaminobenzoic acid (DABA) and 4-(3,4-diamino-phenoxy)-benzoic acid (DPBA). The phenoxyl-containing ABPBIs exhibit better processability and acid stability than original ABPBI, despite their affinities towards acid decrease with the addition of phenoxyl moieties. By adjusting the phenoxyl content of the polymer, we made a tradeoff between acid doping levels and proton conductivity, with mechanical properties. The optimal polymer therein, PO-AB-50 (50 M percentages of DPBA in total monomers), exhibits considerable proton conductivity (53.47 mS/cm at 160 °C) and tensile strength (1.9 MPa) after doped with phosphoric acid. In addition, the oxidation stability, water uptake and swell ratio properties of the polymers were also improved with the introduction of phenoxyl moieties.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Donghua Xing,Ziqi Wang,Minyue Zhang,Shun Liu,Wenke Yang,Rui Yin,Hu Liu,Chuntai Liu,Changyu Shen
The rapid advancement of artificial intelligence has spurred significant advances in wearable systems based on flexible sensors, which nevertheless still face significant challenges in maintaining high sensitivity and stability over broad pressure ranges. Here, an iontronic capacitive pressure sensor featuring a gradient ridge architecture (GRA) electrode integrated with a polyvinyl alcohol-phosphoric acid (PVA-H 3 PO 4 ) ionic gel film is developed. The synergistic combination of the engineered electrode morphology and the mechanical durability and electrochemical stability of the ionic gel film enables a high sensitivity of 5.12 kPa −1 in the low-pressure region (0–20 kPa) and maintains a linear sensitivity of 2.02 kPa −1 over 20–463 kPa. The sensor further demonstrates rapid response and recovery times of 36.5 and 38.6 ms, respectively, along with excellent durability over 10 000 loading cycles. When integrated into an intelligent interactive glove, the GRA sensor enables adaptive robotic hand control and improves reliability through a tactile feedback strategy. Leveraging a 2D convolutional neural network, the smart assistive communication system achieves 97% recognition accuracy for ten distinct hand gestures, enabling real-time translation of intuitive gestures into personalized text and voice outputs. These findings highlight significant potential for next-generation human–machine interfaces, intelligent robotics, and high-performance wearable electronics.
研究领域:
可穿戴电子
·
人工智能
·
柔性传感器
·
人机交互
·
软体机器人
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产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2026
·
IF 5.8
Peng Wu,Yuanyuan Ma,Hongyu Wang,Jianghong Wu,Sheng Fan,Yu Zheng,Yongfeng Li,Lifeng Ding
The electrochemical oscillation (EO) exhibited by Cu anodes during dissolution in H 3 PO 4 /Cl - mixed electrolytes significantly influence the efficacy of processes such as metal surface treatment, precision electroplating, and electrochemical mechanical polishing(ECMP). While Cl - ions have been identified as the key factor inducing oscillations, the mechanism governing their interaction with coexisting cations remains unclear. This study, integrating electrochemical analysis, anodic film surface characterisation, and density functional theory (DFT) calculations, reveals the decisive regulatory role of cations in oscillation mechanisms and corrosion film properties. The findings indicate that, when the influence of Cl - ion concentration is excluded, Na + ions primarily fulfil charge-balancing functions, while Ni 2+ and Al 3+ ions exert synergistic regulatory effects at the active interface. Ni 2+ ions form pure CuCl films through strong adsorption, prolonging oscillation periods. Conversely, Al 3+ ions promote the formation of CuCl/Cu(II)/AlO 4 /Al(OH) x composite films, accelerating film dissolution and shortening periods. The specificity of cations directly determines the stability and dissolution kinetics of films on the Cu anode surface. This study establishes the role of cations as key variables in the electrolytic process, providing a theoretical foundation for understanding EOs and passivation mechanisms.
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DOI
高影响因子
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