CHEMICAL ENGINEERING JOURNAL
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2025
·
IF 13.2
Shanhui Zhu,Ruiqi Wu,Xiaoming Li,Mei Dong,Weibin Fan
Reductive amination of carbonyl compounds such as biomass-based furfural to valuable primary amines is of great importance. However, it often suffers from low efficiency and moderate amine yield. In this work, Ru-loaded TiO 2 nanosheets (NS) enabled stable and efficient conversion of furfural to furfurylamine (FAN), with 97.0 % yield and very low apparent activation energy (20.3 kJ/mol). XPS, EPR and Raman spectra reveal presence of abundant interfacial oxygen vacancies on Ru/TiO 2 -NS, and the intrinsic activity of various Ru/TiO 2 linearly increased with their oxygen vacancy concentration. DFT calculation confirms that oxygen vacancies induce to generate coordinatively unsaturated Ru species, which enhances activation of key intermediate imine. The activation energy of FCH 2 NH (F, furan group) hydrogenation to FAN has been remarkably decreased from 1.07 eV to 0.82 eV on Ru/TiO 2 -NS. Our results illustrate the potential of utilizing interfacial oxygen vacancy sites in enhancement of reaction performance for biomass amination.
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高影响因子
BIOMASS & BIOENERGY
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2025
·
IF 5.8
Tong Wang,Zhihao Cao,Haoxi Ben,Tao Zhao,Xiaoli Yang,Wei Jiang
Developing low-impact, energy-efficient pretreatment technologies is crucial for transitioning the bast fiber manufacturing toward cleaner textile production. This study introduces a hybrid pretreatment method that integrates visible-light-activated photocatalysis using TiO 2 /carbon quantum dots (TiO 2 /CQDs) with pectinase-assisted enzymatic hydrolysis to remove non-cellulosic gums from industrial hemp fibers. Operating at 30 °C and neutral pH, the system achieved 73.75 % lignin and 70.6 % pectin removal without compromising cellulose crystallinity or mechanical integrity. Morphological and spectroscopic analyses revealed effective disintegration of the amorphous matrix and exposure of clean fiber bundles. Mechanistic investigations confirmed the generation of reactive oxygen species (•O 2 − and h + ) under visible light, enabling selective delignification, while pectinase hydrolyzed polysaccharide binders, demonstrating synergistic enhancement of pretreatment efficiency compared to individual treatments. Preliminary energy consumption estimates indicate a 40–60 % reduction compared to conventional alkali-based processes. In addition, this alkali-free method could minimize wastewater generation. Hence, the proposed system offers a technically viable and environmentally preferable pathway toward clean and decentralized fiber manufacturing.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2025
·
IF 6.3
Youxu Yu,Yuxin Liu,Zhefei Pan,Liang An,Rong Chen
The performance of a dual-photoelectrode photoelectrochemical cell highly depends on cell configuration. Conventional opposite configuration usually requires bilateral illumination at both the photoelectrodes, while the parallel configuration has a large mass transfer resistance between the two ends of the photoelectrodes. Herein, a dual-photoelectrode photoelectrochemical cell with an opposite configuration is developed, in which a high-transmittance mesoporous TiO 2 photoanode and an air-breathing Cu 2 O-CuO nanowires photocathode are adopted. The mesoporous TiO 2 photoanode can absorb incident UV light for photoanodic reactions, and its high transmittance allows for substantial visible light to pass through the photoanode to illuminate the photocathode for reduction reactions. This design not only enables unilateral illumination to the photoelectrochemical cell with an opposite configuration and spectral splitting of sunlight utilization but also enhances light harvesting. Due to these merits, the dual-photoelectrode photoelectrochemical cell with a mesoporous TiO 2 photoanode exhibits an increase in the short current density by 78.6 % and an increase in the maximum power density by 8.1 % compared to the one with the nanoparticles-packed TiO 2 photoanode.
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高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Ting Yang,You Zuo,Sijia Yan,Hang Zhang,Huanlin Zhang,Lei Ling,Baichuan He,Jiaqi Lu,Shu Cai
MnO 2 cathodes have been the focus of extensive research for aqueous zinc-ion batteries, owing to their inherent safety, environmental sustainability, and substantial theoretical capacity. However, manganese dissolution and slow kinetics during cycling lead to poor cycle stability and rate performance. In this study, a TiO 2 interphase was constructed on the δ-MnO 2 cathode by chemical liquid-phase deposition, which effectively inhibited the dissolution of manganese and improved the wettability of the electrode in the electrolyte, thus increasing the rate of ion transport at the interface, especially H + . Consequently, better cycle stability and faster electrochemical kinetics are produced for the δ-MnO 2 cathode, with a capacity retention of 87.6 % after 1000 cycles at 10 A g -1 and a specific capacity of 310 mAh g -1 at 0.2 A g -1 . This cost-effective and efficient method of constructing interphase to enhance electrode performance is scalable and provides insights into enhancing the performance of other manganese-based cathodes for aqueous zinc-ion batteries.
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Rushun Xue,Lingmin Yu,Man Gong,Chuantao Zhang,Senlin Li,Shanglin Yang,Xuefeng Xiao,Ning Nan,Chun Li,Xinhui Fan
CuO is a typical p-type semiconductor with the advantage of narrow bandgap, making it a gas sensing material for detecting CO gas at lower operating temperatures.However, the poor response value limits its application. As a classical wide-band gap n-type gas sensing metal oxide semiconductor, TiO 2 has the advantages of high response to CO. However, high operating temperature becomes the big obstacle to overcome. Therefore, sensitive CO detection at lower temperature will be achieved by integration of CuO with TiO 2 . In this paper, in-situ two step hydrothermal method was used to prepare CuO/TiO 2 vertical bilayer nanorod arrays grown in situ. The gas sensing results show that the response value of the CuO/TiO 2 vertical bilayer nanorod arrays is 6.1 times (14.9, 300 ppm) higher than that of single CuO nanotentacle arrays (2.1, 300 ppm), and the operating temperature is reduced to 100 °C compared with pure TiO 2 nanorod arrays (360 °C). This strategy provides a new idea for the fabrication of CO gas sensors with high response and low operating temperature.
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高影响因子
Journal of Environmental Chemical Engineering
·
2021
·
IF 5.909
Xu Duan,Jian Yang,Guang Hu,Chen Yang,Yangfan Chen,Qingcai Liu,Shan Ren,Jiangling Li
In this work, based on a type of energy band engineering strategy as calcination , TiO 2 /ZSM-5 hybrids for photodegradation of methyl orange (MO) in water under UV light have been developed via a facile solid state diffusion method. Effects of varied calcination temperatures on TiO 2 /ZSM-5 hybrids have been systematically characterized including XRD , FT-IR, SEM, TEM , EDX mapping, BET, PL , EIS , UV–vis DRS, active species trapping experiments and Mott-Schottky curves. It was found that the calcination temperature influenced photocatalytic activity , typically on physicochemical properties of materials and adjustment for the energy gap and band position of TiO 2 . The XRD analysis revealed that hybridization of ZSM-5 kept the crystal phase of TiO 2 as anatase unchanged with the high-rising calcined temperature. The optimum sample calcined at 450 °C named as Z-T (450) presented nearly 99% degradation rate for MO, owing to optimal uniform distribution, highest specific surface area and best charge separation/transfer efficiency. The FT-IR comparison result that the functional groups and peak strength of the used catalyst were alike as before, showed the stability of photocatalyst . Adoption of calcination strategy does provide not only a clean, low-cost and highly efficient path to approach the complete degradation of azo dyes , but also a chance for photocatalytic technology to fulfill the implementation in industrial applications.
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高影响因子
CATALYSIS TODAY
·
2018
·
IF 4.667
Miao Lai,Jie Zhao,Qingcai Chen,Shuaijun Feng,Yujie Bai,Yingxuan Li,Chuanyi Wang
In the photocatalytic volatile organic compounds (VOCs) degradation, the accumulation of intermediate products on the surface of catalysts could cause a decrease in activity through retarding reactant (e.g. O 2 ) supply to surface active sites. Herein, Bi decorated TiO 2 photocatalysts (Bi/TiO 2 ) for photocatalytic toluene degradation were prepared and systematically studied. It is found that metallic Bi modification improves the ability of photocatalysts to capture O 2 . As a result, the activities of the Bi/TiO 2 photocatalysts are obviously higher than that of the TiO 2 for photocatalytic toluene degradation, and the productions of photogenerated reactive oxygen species ( O 2 − and H 2 O 2 ) over the Bi/TiO 2 photocatalysts are almost equal to that over the TiO 2 despite the fact that the separation efficiency of photoinduced charge carriers is decreased after the addition of Bi. Adsorbed benzaldehyde is the main surface intermediate on the surface of the Bi/TiO 2 photocatalysts, whereas plenty of more readily oxidized aliphatic carboxylate species was monitored on the surface of the TiO 2 , which can be attributed to insufficient O 2 supply to the TiO 2 surface. This further indicates the positive role of the promoted O 2 supply by Bi in the photocatalytic toluene degradation. The present work offers a new window for addressing the catalyst deactivation in the photocatalytic VOCs degradation.
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NEW JOURNAL OF CHEMISTRY
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2015
·Vol. 39
·期 8
·6540-6547
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IF 3.086
Yue Hu,Chen Xiao Shan,Jun Wang,Jun-Ming Zhu,Chao-Qian Gu,Wen-Ting Ni,Dong Zhu,Ai-Hua Zhang
Singly-functionalized nanomaterials cannot fully meet the requirements for biological applications, although most of them have still been used in the enrichment of phosphopeptides. Multifunctional nanocomposites with more capacity for the specific enrichment of phosphopeptides are becoming a new research focus. Here, a simplified and effective system was developed for the fast and highly selective enrichment of phosphopeptides using functionalized SiO2/TiO2 nanocomposites as sorbents. The functionalized SiO2/TiO2 nanocomposites were prepared by an amidation reaction between the amino groups of mesoporous SiO2 nanoparticles and the carboxyl groups of TiO2 nanocrystals. The nanocomposites' surfaces possess high absorption capacity for phosphopeptides, taking advantage of both the strong anion exchange ability of the amine-functionalized SiO2 nanospheres and the high metal oxide affinity of the TiO2 nanocrystals. A simplified approach using a pipette tip filled with prepared functionalized SiO2/TiO2 nanocomposites was applied to enrich phosphopeptides in digests of phosphoprotein (β-casein), mixtures of β-casein and bovine serum albumin (BSA), and non-fat milk. Using this approach, enriched phosphopeptides were obtained from the digested peptides in less than one minute. The phosphopeptides were analyzed by MALDI-TOF-MS, and the limit of detection for phosphopeptides was approximately 10 femtomoles. With highly selective enrichment efficiency, the functionalized SiO2/TiO2 nanocomposites could have great promise for applications in MS-based phosphoproteomics.
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高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2018
·Vol. 54
·期 5
·3795-3804
·
IF 2.993
Song Lixin,Jing Wanru,Chen Jingjing,Zhang Shouren,Zhu Yuqing,Xiong Jie
The light response range, reusability, and durability of photocatalyst are the key issues for its practical application. To address these problems, the C-doped TiO 2 /carbon nanofibrous (CTCNF) film with incorporation of C-doped TiO 2 nanoparticles into carbon nanofibers was prepared by electrospinning and calcination (pre-oxidation and carbonization). All the obtained CTCNF films exhibited a promising light absorption in ultraviolet–visible region. With optimization of carbonization temperature, the CTCNF film carbonized at 800 °C (CTCNF-800) showed a strongest light absorption. Consequently, the CTCNF-800 possessed a highest photocatalytic degradation efficiency of 94.2% for degradation of rhodamine B. In addition, the CTCNF-800 possessed excellent flexibility and deserved mechanical strength, and hence, the CTCNF-800 could be easily segregated from solution and recycled. Satisfyingly, its degradation efficiency still exceeded 92% after using for six cycles, implying that the CTCNF had excellent reusability and well stability. Besides, the degradation efficiency was over 90% after the CTCNF-800 kept in air without illumination for 1 year, indicating its outstanding durability. The CTCNF film photocatalyst demonstrates tremendous potential in practical application for purification of wastewater.
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JOURNAL OF ELECTRONIC MATERIALS
·
2018
·Vol. 47
·期 4
·2230-2236
·
IF 1.566
Yin Xin,Guan Yingli,Song Lixin,Xie Xueyao,Du Pingfan,Xiong Jie
A bi-layer photoanode is successfully fabricated for dye-sensitized solar cells (DSSCs) composed of P25/TiO 2 nanorod (P25/TNR) as the underlayer and TiO 2 nanosheet spheres (TNSs) as the light-scattering layer. Notably, the P25-TNR provides multiple functions, including more dye loading, more efficient charge transport and a lower electron recombination rate for the photoanode. Besides, the unique structure of TNS can significantly improve the light-harvesting capacity, boosting the light-harvesting efficiency. Therefore, an enhanced short-circuit current and power conversion efficiency of 18.04 mA cm −2 and 5.99%, respectively, were achieved for the P25/TNR-TNS-based DSSC, which was better than that of the P25-TNS-based (15.17 mA cm −2 , 5.36%) and bare TNS-based (11.43 mA cm −2 , 4.14%) DSSCs. This indicates that this bi-layer structure effectively combines the advantages of the one-dimensional (1D) nanostructure and three-dimensional (3D) hierarchical structure. In short, this work demonstrates the possibility of fabricating desirable photoanodes for high-performance DSSCs by rational design of nanostructures and effective combination of multi-functional components.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2019
·
IF 3.375
Hangyu Gu,Hongkang Wang,Rong Zhang,Tianhao Yao,Ting Liu,Jinkai Wang,Xiaogang Han,Yonghong Cheng
Lithium–sulfur (Li–S) batteries as among the most promising energy storage devices possess high theoretical capacity and energy density but suffer from the polysulfide dissolution, which hinders their practical application. Herein, we present a facile synthesis of hollow carbon nanoballs (HCNBs) anchored with ultrafine TiO2 nanoparticles (TiO2@HCNBs) in which the HCNBs with hollow interiors and graphitic crystallization accommodate the volume expansion of sulfur upon lithiation and improve the cathode conductivity, while the TiO2 nanoparticles effectively trap the polysulfides through strong chemical bonding. Notably, the S@TiO2@HCNBs with a high sulfur loading of ∼73 wt % demonstrate superior cycle performance at 0.5 C over 600 cycles with a slow capacity decay and deliver high specific capacities of 1217, 1013, 893, and 773 mA h/g at 0.1, 0.2, 0.5, and 1 C, respectively. The adsorption test clearly reveals the efficient suppression of the polysulfide shuttling owing to the spatial and chemical confinement of the TiO2@HCNBs host.
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Desalination and Water Treatment
·
2024
·
IF 1
Lu Peng,Peng Nian,Jingwei Feng,Xiangxiang Han,Binhua Cui,Songsheng Lu,Jie Zhang,Chenming Li,Aiyong Zhang
The present study evaluated fabrication of bioactivated carbon (BAC) from waste activated sludge (WAS) for methyl tert-butyl ether (MTBE) removal from aqueous solution. BACs were prepared using KOH, H 3 PO 4 , and ZnCl 2 as chemical activation reagents, followed by thermal activation. Batch experiments with different BAC types and dosages, solution pH, initial MTBE concentrations, and contact times were conducted to investigate the BAC effectiveness. The obtained data were analyzed using the kinetics and isotherm model and also with artificial neural network (ANN). The result of Fourier transform infrared (FTIR) spectra of WAS and BAC was depicted that the C–H and C–C were major surface functional groups. The ZnCl 2 activated carbon had the highest adsorption capacity for MTBE adsorption, followed by H 3 PO 4 and KOH activated carbons. The results showed that the highest MTBE removal was observed at solution pH equal to 4 and approximately 30% of MTBE could be adsorbed with 30 min contact time. It was also found that MTBE adsorption followed the R–P isotherm and pseudo-second order (type 1) kinetic models. During ANN modeling, the optimum neurons number for Levenberg–Marquardt training algorithm was determined equal to 5 with highest R 2 value and lowest mean square error were found to be 0.99 and 5.7 × 10 –4 , respectively.
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