BIORESOURCE TECHNOLOGY
·
2022
·
IF 11.889
Meijiao Peng,Jiatian Zhu,Yadan Luo,Tao Li,Xuelian Xia,Chengrong Qin,Chen Liang,Huiyang Bian,Shuangquan Yao
The cellulose-rich residual solids are obtained with p -toluenesulfonic acid ( p -TsOH) treatment. However, better fractionation of hemicellulose and separation is difficult to obtain during treatment. This study aims at investigating the separation selectivity of bamboo hemicellulose using freeze–thaw-assisted p -TsOH (F/ p -TsOH) treatment. The desired separation effect was achieved at freezing temperature −40 °C, freezing time 20 h, p -TsOH concentration 3.0 %, treatment temperature 130 °C and time 80 min. 93.26 % hemicellulose separation was found, which was 32.88 % higher than that of conventional p -TsOH treatment. Furthermore, the separation yield of lignin decreased significantly from 69.29 % to 13.98 %. The distinct lignin characteristic absorption peaks were found, while that of hemicellulose was difficult to observe. The fiber crystallinity index increased from 50.42 to 56.55 %. Furthermore, greater selectivity for hemicellulose separation was achieved. The results provide a new research thinking for efficient fractionation of lignocellulosic biomass by organic acid treatment.
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DOI
PubMed
高影响因子
POLYMER DEGRADATION AND STABILITY
·
2025
·
IF 7.4
Xinchao Li,Shansan Yuan,Pin Wang,Jianfeng Li,Jin Zhang,Fafu Zong,Zhaohui Zheng,Guoxing Sun,Mingjun Chen,Ting Wang,Zhicheng Fu,Wenli An,Jinni Deng
Flammability and droplet behavior are the key obstacle to the development of polypropylene (PP) materials. Traditional flame retardants (FRs) for this are inefficient and often lead to strong damage in mechanical performance, due to their whole-part distribution and incompatibility in PP blends. To address this, in this work, novel intumescent flame retardants with Si-P-N single-molecule synergy (SMIFRs) were prepared and introduced in PP by melt-blending process. Owing to the low-surface-energy properties of Si, it’s confirmed that SMIFRs could mostly aggregate on the surface, demonstrating high-efficient flame retardancy and obviously enhanced mechanical properties in PP blend. More specifically, with just 3.3 wt% phosphorus content, PP blend can achieve V-0 rating without any melt-droplet phenomenon, exhibiting increased limiting oxygen index (LOI) value by 58% and reduced peak heat release rate (pHRR) by 81%, compared with pure PP. Notably, just because of the surface aggregation that not only decreases the content of SMIFRs but also lowers its internal distribution in PP, the damage of mechanical properties of PP blend is greatly weakened (elongation is 57% higher than the blend prepared by mixed FRs at the same ratio), demonstrating optimal mechanical properties compared with flame-retardant PP blends reported before. This mechanism based on surface aggregation and single-molecule synergy would provide a novel strategy for PP to acquire both high-efficient flame retardancy and good mechanical performance.
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DOI
高影响因子
GREEN CHEMISTRY
·
2025
·
IF 9.2
Yating Hou,Xiaoli Sun,Shan Lu,Ningyuan Song,Yanru Liu,Shu Yang,Fangxu Dai,Yunmei Du,Lei Wang
It is a challenge to enable non-precious metal-based electrodes to exceed the ultra-high alkaline HER activity of Pt-based precious metals by constructing a ‘vacancy–dopant structure’ with controllable vacancy concentration. Density functional theory (DFT) calculations revealed that the ‘P vacancy (Pv)–Cr dopant structure’ stimulates a significant enhancement-tandem effect during the alkaline HER process. This enhancement effect is reflected in enhanced conductivity and the adsorption capability of H2O and OH*, thereby reducing the reaction energy barrier. Simultaneously, the tandem effect induces the Cr dopant near Pv as a unique OH* adsorption site, thereby activating the Ni(Pv)–P–Cr(Pv) mechanism that effectively prevents the poisoning of Ni hydrophilic sites and optimizes the alkaline HER pathway. Based on these findings, Cr–NiPv/IF with the ‘Pv–Cr dopant structure’ was innovatively constructed using the ‘phosphorization-quenching’ technique. Interestingly, the quenching temperature difference is positively correlated with the Pv concentration. Under the enhancement-tandem effect of the ‘Pv–Cr dopant composite structure’, Cr–NiPv/IF only requires 240 mV to deliver 1 A cm−2 for alkaline HER, which is 3.04-fold higher than that of Pt/C@IF. This work offers a novel design concept for constructing non-precious metal-based electrodes that surpass the performance of Pt-based electrodes.
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DOI
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2023
·
IF 5.4
Jiamin Zhong,Shihong Zhang,Yi He,Yi Fan,Zhiyuan Li,Liping Yan,Huilian Zhou,Xinyu Cheng,Jinxue Song,Hongjie Li
In this paper, graphene oxide (GO) and furan epoxide graphene (FGO) were synthesized using graphene (G) as raw materials, and added to Ni-W-P coating as nano-reinforced materials, and various composite materials were successfully prepared by electroless plating , and the effects of G, GO and FGO as nano-reinforced materials on the surface morphology , wear resistance, corrosion resistance and microhardness of Ni-W-P coatings were studied and discussed. The experimental results show that the surface morphology of Ni-W-P-FGO coating is the most complete and dense, without obvious surface defects . In the friction test, Ni-W-P-FGO composite coating has the narrowest wear section, the wear amount is 311.617 μm 2 /N (minimum) and the average friction coefficient is the smallest (0.203) and it shows the best corrosion resistance in the corrosion resistance test, with the lowest corrosion current density (i corr = 0.7095 μA/cm 2 ) and the largest corrosion resistance (Rt = 66,554 Ω·cm 2 ).
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DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2021
·
IF 2.495
Minmin Liu,Baitong Niu,Hongxu Guo,Shaoming Ying,Zhangxu Chen
g-C 3 N 4 @Ni 3 C nano-sheets have been prepared by a simple pyrolysis under different temperature, and the as-prepared samples have been characterized by many means, such as X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), the Brunauer–Emmett–Teller (BET) and pore size distribution. The as-prepared g-C 3 N 4 @Ni 3 C nano-sheet has been proved to be a versatile functional material, that is the application in supercapacitor electrode materials, hydrogen generation via NaBH 4 hydrolysis and reduction of p– nitrophenol. This method offers a new strategy for preparation of environmental energy materials through simple raw materials.
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高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2022
·
IF 10.319
Yang Lin,Song He,Zhiyong Ouyang,Jianchao Li,Jie Zhao,Yanhe Xiao,Shuijin Lei,Baochang Cheng
Hierarchical porous carbon co-doped with heterogeneous atoms has attracted much attention thanks to sizable internal void space accommodating electrolyte, high-density microporous structure physically confining polysulfides (LPS), and heterogeneous atoms serving as active sites to capture LPS. However, solely relying on carbon material defects to capture LPS proves ineffective. Hence, metal compounds must be introduced to chemisorb LPS. Herein, cobalt ions are in-situ grown on the polydopamine layer coated on the surface of biomass-derived S, N, P co-doped hierarchical porous carbon (SNP-PC). Then a layer of nitrogen-doped porous carbon (MPC) dotted with CoSe nanoparticles is acquired by selenizing. Thus, a strong-polar/weak-polar composite material of SNP-PC studded with CoSe nanoparticles is obtained (SNP-PC@MPC@CoSe). Button cells assembled with SNP-PC@MPC@CoSe-modified separator enable superb long-cycle stability and satisfactory rate performance. An excellent rate capacity of 796 mAh g −1 at a high current rate of 4 C with an ultra-low capacity fading of 0.06% over 700 cycles can be acquired. More impressively, even in a harsh test condition of 5.65 mg cm −2 sulfur loading and 4 μL mg −1 ratio of electrolyte to active materials, the battery can still display a specific capacity of 980 mAh g −1 (area capacity of ∼5.54 mAh cm −2 ) at 0.1 C. This work provides a promising route toward high-performance Li-S batteries.
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高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2021
·
IF 7.963
Cheng Ye,Jing Deng,Lingyi Huai,Anhong Cai,Xiao Ling,Hongguang Guo,Qiongfang Wang,Xueyan Li
Organoarsenic contaminants existing in water body threat human health and ecological environment due to insufficient bifunctional treatment technologies for organoarsenic degradation and inorganic arsenic immobilization. In order to safely and efficiently treat organoarsenic contaminants discharged into the aquatic environment, Co-Mn-Fe layered double hydroxide (CoMnFe-LDH) and Co-Mn-Fe layered double oxide (CoMnFe-LDO) were fabricated and employed as peroxymonosulfate (PMS) activator for organoarsenic degradation and inorganic arsenic immobilization, and p -arsanilic acid ( p -ASA) was selected as target pollutant. Results demonstrated that the satisfactory removal of p -ASA (100.0%) in both CoMnFe-LDH/PMS and CoMnFe-LDO/PMS systems was obtained within 30 min, and substantial inorganic arsenic adsorption could be achieved (below 0.5 mg/L) in two systems with converting major inorganic arsenic species to arsenate. As XPS, ESR and quenching experiment revealed, the existence and generation of surface-bound radicals in two systems were identified. Based on density functional theory calculation and XPS analysis, the catalytic mechanism of CoMnFe-LDO/PMS system that PMS could be activated via direct electron transfer from adsorbed p -ASA was clarified, which differed from PMS activation via coupling with surface hydroxyl groups in CoMnFe-LDH/PMS system. Catalytic performance assessment under various critical operation parameters indicated that CoMnFe-LDH presented more stable ability of p -ASA removal in a wide pH range and complex aquatic environment. The recycle experiment demonstrated the excellent stability and reusability of CoMnFe-LDH(LDO). Besides, seven degradation products of p -ASA in CoMnFe-LDH/PMS system including phenolic compounds , azophenylarsonic acid, nitrobenzene and benzoquinne were identified by UV–Vis spectra and LC-TOF-MS analysis, and the corresponding degradation pathway was proposed. In summary, compared to CoMnFe-LDO/PMS, CoMnFe-LDH/PMS holds great promise for the development of an oxidation-adsorption process for efficient control of organoarsenic pollutant.
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DOI
高影响因子
Materials Advances
·
2025
·
IF 4.7
Xinxin Li,Lianjie Du,Zhou Wan,Doudou Xu,Chen Liu
In this study, novel ZnO/BiOI/AgI ternary heterojunction photocatalysts were synthesized via a facile precipitation method to address challenges in organic pollutant degradation and microbial disinfection under visible light irradiation. The composites were systematically characterized (XRD, SEM, TEM, XPS, BET, UV-vis DRS, and PL), showing significantly enhanced visible light absorption, efficient charge carrier separation, and superior photocatalytic performance, compared to binary and single-component counterparts. The optimized ZnO/BiOI/AgI-3030 sample achieved 98.1% degradation of Rhodamine B (RhB) and 59.1% degradation of Norfloxacin (NOR) within 3 hours, attributed to the synergistic effects of the heterojunction structure, which facilitated efficient charge transfer and promoted the generation of reactive oxygen species (ROS). Furthermore, the composite demonstrated remarkable antibacterial activity against Escherichia coli (E. coli), Staphylococcus aureus (S. aureus), and methicillin-resistant Staphylococcus aureus (MRSA), with bactericidal rates exceeding 99.8%. Cytotoxicity assays revealed 88.79% inhibition of DLD-1 colorectal cancer cells. Mechanistic studies confirmed the formation of a unique n–p–n heterostructure, enabling effective charge carrier separation and strong redox capabilities. Additionally, the photocatalysts exhibited excellent stability and reusability over four consecutive degradation cycles, maintaining high catalytic efficiency. These findings underscore the potential of ZnO/BiOI/AgI ternary composites as efficient and sustainable photocatalysts for environmental remediation and antimicrobial applications.
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高影响因子
XENOBIOTICA
·
2016
·
IF 1.723
Rui-Ping Ye,Zhen-Dong Chen
1. The expression and function of P-glycoprotein (P-gp) is associated with the phenotype of multidrug resistance (MDR). Saikosaponin A (SSA) is a triterpenoid saponin isolated from Radix Bupleuri. This study was mainly designed to understand effects of SSA on MDR in MCF-7/ADR and HepG2/ADM cells.2. MDR reversal was examined as the alteration of cytotoxic drugs IC50 in resistant cells in the presence of SSA by MTT assay, and was compared with the non-resistant cells. Apoptosis and uptake of P-gp substrates in the tumor cells were detected by flow cytometry. Western blot was performed to assay the expression of P-gp.3. Our results demonstrate SSA could increase the chemosensitivity of P-gp overexpressing HepG2/ADM and MCF-7/ADR cells to doxorubicin (DOX), vincristine (VCR) and paclitaxel. SSA promoted apoptosis of MCF-7/ADR cells in the presence of DOX. Moreover, it could also increase the retention of P-gp substrates DOX and rhodamine 123 in MCF-7/ADR cells, and decrease digoxin efflux ratio in Caco-2 cell monolayer. Finally, a mechanistic study showed that SSA reduced P-gp expression without affecting hydrolytic activity of P-gp.4. In conclusion, our findings suggest that SSA could be further developed for sensitizing resistant cancer cells and used as an adjuvant therapy together with anticancer drugs to improve their therapeutic efficacies.
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DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2018
·Vol. 6
·期 13
·3206-3211
·
IF 5.976
Dan Liu,Peng Shi,Wei Ren,Yantao Liu,Gang Niu,Ming Liu,Nan Zhang,Bian Tian,Weixuan Jing,Zhuangde Jiang,Zuo-Guang Ye
A new kind of thermocouple consisting of n-type and p-type semi-conductive oxides with a giant thermoelectric voltage is reported. The thermocouple was fabricated from n-type La0.8Sr0.2CrO3 and p-type In2O3 and it exhibits a high thermoelectric voltage of 410.3 mV at 1270 °C, which is the highest value reported for any type of thermocouples to date. This achievement challenges the long-established material selection principles for thermocouples and opens a new way for designing highly sensitive thermal sensors. The thermocouple developed in this work has great potential for practical applications in high temperature sensing in harsh environments.
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高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2019
·
IF 3.834
Runren Jiang,Donghai Wu,Guanghua Lu,Zhenhua Yan,Jianchao Liu,Ranran Zhou,Matthew Nkoom
Herein, Fe 3 O 4 quantum dots modified BiOCl/BiVO 4 p-n heterojunction was successfully synthesized by a facile strategy. Multiple techniques were carried out to characterize the as-prepared samples. Results show that the photocatalysts possess regular crystal structure and consisted of BiOCl/BiVO 4 nanosheet structure with Fe 3 O 4 QDs on its surface. Particularly, 20% Fe 3 O 4 QDs@BiOCl/BiVO 4 p-n heterojunction shows universal outstanding photocatalytic activity for removing four different broad-spectrum antibiotics under visible light. Meanwhile, the mineralization degree and degradation pathways of antibiotic were further studied by 3D-EEMs and LC-MS/MS. The improved photocatalytic performance for degradation of broad-spectrum antibiotics mainly attributes to the effective charge carrier mobility, large specific surface areas, and strong visible light absorption. The photocatalytic reaction mechanism was also revealed by the electron spin resonance (ESR) technique and the active species trapping experiments. The photocatalyst stays stable crystal structures after four reaction cycles and it can be easily separated from the solution by an external magnetic field both demonstrate that the Fe 3 O 4 QDs@BiOCl/BiVO 4 p-n heterojunction has unlimited potential for practical usage. This work is expected to be widely applicable to the removal of broad-spectrum antibiotics.
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高影响因子
MEASUREMENT
·
2024
·
IF 5.2
Bin Yin,Zhuxuan Jiang,Shilin Liu,Guofeng Sang,Yanzhi Lv,Muguang Wang,Shiying Xiao,Beilei Wu,Qichao Wang,Li Pei,Songhua Wu
A composite Fabry-Perot (F-P) fiber optic sensor based on the vernier effect is fabricated, and experiments confirmed that it can be used to simultaneously measure underwater temperature and pH. The fiber optic sensor fabricated with single mode fiber (SMF) − multi mode fiber (MMF) − seven core fiber (SCF) − quartz capillary tube (QCT) − no core fiber (NCF) structures has contained a silane coupling agent-polyvinyl alcohol/graphene oxide (SCA-PVA/GO) hybrid multilayer film to enhance the sensor performance. Two types of sensors are fabricated, one with a plane end face and another with a tapered end surface, which named as sensor 1 and sensor 2, respectively. Their performance are experimentally demonstrated. Within the temperature range of 15°C-35°C and the pH range of 7.55–9.21, the sensitivities of sensor 1 to temperature and pH are 82.94 pm/°C and 1.16 dB/pH, while the corresponding values of sensor 2 are 39.26 pm/°C and 0.4 dB/pH. Experimental results demonstrated that the sensitivities of sensor 1 to temperature and pH are higher than that of sensor 2. But compared with sensor 2, sensor 1 has higher values of crosstalk and random error. By contrast, sensor 2 maintain a good linear relationship with the environmental dual parameters, allowing for the simultaneous measurement of underwater temperature and pH. Moreover, both sensors demonstrate good stability and reversibility when the temperature and pH are varied. Furthermore, the pH response times of the two sensors are less than 0.5 s, with a recovery time of 2 s. Thus, the proposed sensors with outstanding stability, reversibility, repeatability, and rapid response times will have a broad range of applications in the fields of marine environment monitoring, water quality detection, and food and medical device safety testing.
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高影响因子
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