Separation Science Plus
·
2018
·Vol. 1
·期 3
·217-224
·
IF 0
Lei Chen,Lei Wang,Dan Song,Zhangrun Xu
A three-dimensional reduced graphene oxide porous aerogel with packaged TiO 2 nanoparticles was prepared by a simple one-step self-assembly in a water bath at a mild temperature. Herein, we overcame the aggregation of graphene layers by forming three-dimensional architecture, and utilized TiO 2 aggregates as blocks to make the composite surface uneven. The extended aromatic areas contribute to DNA adsorption by aromatic stacking and hydrophobic interaction. The obtained composite exhibited porous structure and was positively charged at a low pH. The composite exhibited a high capacity of 890.1 mg g −1 and an adsorption efficiency of 98.4% to DNA at pH 3, however, bovine serum albumin at the same concentration level was hardly adsorbed. The composite showed favorable selectivity to DNA against protein even designed in such a simple manner. The retained DNA could be stripped by using a 0.04 mol L −1 Britton–Robinson buffer at pH 10, giving rise to a recovery of 96.3%. The DNA was isolated from human whole blood to be used as templates for PCR amplification successfully. This illustrates that DNA with high purity and quality was obtained.
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RSC Advances
·
2013
·Vol. 3
·期 32
·13149-13155
·
IF 2.562
Kunlei Zhu,Jianhua Tian,Yiping Liu,Na Lin,Qiwei Tang,Xiangmei Yu,Yingming Zhu,Zhongqiang Shan
The effect of reaction temperature and aging time on TiO2 precursor beads synthesized using a sol–gel method was studied. The size of the precursor beads decreased and deformed spheres appeared with increasing temperature. Meanwhile, TiO2 precursor beads grew with the aging time up to a reaction time of 18 h. Using a solvothermal process for the precursor beads, submicron-sized mesoporous anatase TiO2 beads (SMATBs) with a specific surface of 153.2 m2 g−1, much higher than initially reported, were synthesized by controlling the reaction conditions and were successfully employed as negative electrode for Li-ion batteries. The specific capacities of the submicron-sized mesoporous TiO2 beads are much higher than those of their counterparts at high charge–discharge rates. In the first cycle, the TiO2 beads showed discharge capacities of 172.0 mA h g−1, 129.6 mA h g−1, 117.1 mA h g−1 and 56.7 mA h g−1 at charge–discharge rates of 1 C (1 C = 170 mA g−1), 5 C, 10 C and 30 C, respectively. 85.1% discharge capacities were retained after 200 cycles at 1 C charge–discharge rate. After 600 cycles, there is still 81.8% discharge capacity retained at 5 C charge–discharge rate. Moreover, the TiO2 beads also exhibitied 86.9 mA h g−1 and 34.0 mA h g−1 discharge capacities at 10 C and 30 C charge–discharge rates over 600 cycles, respectively. In addition, the Coulombic efficiency is nearly 100% at each cycle at various charge–discharge rates.
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高影响因子
MICROCHIMICA ACTA
·
2023
·Vol. 190
·期 4
·1-11
·
IF 5.7
Yang Jing,Deng Changxi,Zhong Wei,Peng Guanwei,Zou Jin,Lu Yan,Gao Yansha,Li Mingfang,Zhang Songbai,Lu Limin
Heterostructured TiO 2 @MXene rich in oxygen vacancies defects (VO-TiO 2 @MXene) has been developed to construct an electrochemical sensing platform for imidacloprid (IMI) determination. For the material design, TiO 2 nanoparticles were firstly in situ grown on MXene and used as a scaffolding to prevent the stack of MXene nanosheets. The obtained TiO 2 @MXene heterostructure displays excellent layered structure and large specific surface area. After that, electrochemical activation is utilized to treat TiO 2 @MXene, which greatly increases the concentration of surface oxygen vacancies (VOs), thereby remarkably enhancing the conductivity and adsorption capacity of the composite. Accordingly, the prepared VO-TiO 2 @MXene displays excellent electrocatalytic activity toward the reduction of IMI. Under optimum conditions, cyclic voltammetry and linear sweep voltammetry techniques were utilized to investigate the electrochemical behavior of IMI at the VO-TiO 2 @MXene/GCE. The proposed sensor based on VO-TiO 2 @MXene presents an obvious reduction peak at -1.05 V(vs. Hg|Hg 2 Cl 2 ) with two linear ranges from 0.07 - 10.0 μM and 10.0 - 70.0 μM with a detection limit of 23.3 nM (S/N= 3). Furthermore, the sensor provides a reliable result for detecting IMI in fruit and vegetable samples with a recovery of 97.9-103% and RSD≤ 4.3%. Graphical abstract
A sensitive electrochemical sensing platform was reported for imidacloprid (IMI) determination based on heterostructured TiO 2 @MXene rich in oxygen vacancy defects.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2017
·
IF 3.582
Hao Xu,Songsong Li,Lei Ge,Changcun Han,Yangqin Gao,Dongsheng Dai
Efficient separation of photo-generated electrons and holes is a crucial aspect for photocatalytic hydrogen evolution . Herein, novel plate-like Co(OH) 2 decorated TiO 2 nanosheets for photocatalytic water splitting were synthesized by a facile in-situ synthetic method. The results of X-ray diffractometry (XRD), transmission electron microscope (TEM), UV–Vis diffusion reflectance spectroscopy (DRS) and X-ray photoelectron spectroscopy (XPS) indicate the successfully incorporation of Co(OH) 2 co-catalysts onto the surface of TiO 2 nanosheet photocatalysts . Further photocatalytic hydrogen evolution experiments illustrate that all Co(OH) 2 decorated TiO 2 samples show higher rate of hydrogen production performance than pure TiO 2 sample and the composite sample with Co(OH) 2 loading amount of 0.5mol% presents the highest photocatalytic hydrogen production activity of 746.93 μmol g −1 ·h −1 . It is indicated that plate-like Co(OH) 2 particle act as an electron collector, which leads to photo-generated electrons transfer from TiO 2 to Co(OH) 2 , and therefore enhance the photocatalytic activity . Based on above results, a possible mechanism is proposed and further verified by surface photovoltage spectra (SPV).
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高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Donghui Xu,Wenyan Chen,Yilin Luo,Hongshan Wei,Chujun Yang,Xin Cai,Yueping Fang,Xiaoyuan Yu
SiO x (0 < x < 2) based materials are attractive for developing high-capacity and durable anodes toward superior lithium storage. Herein, low cost and tailorable core-shell SiO@TiO 2 nanocomposites have been synthesized via simple ball milling and sol-gel process. The designed nanocomposite is composed of nano-sized SiO as the inner core and amorphous TiO 2 layer as the shell. Remarkably, when used as anode material for lithium-ion batteries, the SiO@TiO 2 exhibits greatly enhanced capacity performance and cycling stability due to its rational core-shell structure. The optimal nanocomposite delivers a high initial specific capacity of 1920 mA h g −1 with high initial coulombic efficiency of 79.4%, along with a stable reversible capacity of 901 mA h g −1 after 200 cycles at 200 mA g −1 and impressive high-rate capacity of 272 mA h g −1 at 3000 mA g −1 . The excellent electrochemical performance of the nanocomposite is contributed by the synergetic core-shell structure, in which the amorphous TiO 2 shell can not only act as protective/elastic buffer layer to accommodate the volume change of the SiO nanoparticles upon cycling, but also largely favor the Li + diffusion in the nanocomposite toward highly reversible lithium storage. In virtue of the simple, green and scalable fabrication process, these robust and efficient nanocomposites are promising to realize inexpensive and high-performance lithium ion batteries anodes and related energy storage applications .
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Haoran Wang,Wei Ji,Feng Xiao,Yewen Xiao,Linlin Li,Xia Shu,Hualin Wang,Jun Yin
Over-ripening and spoilage of fruits, driven by excessive ethylene (C 2 H 4 ) production and microbial proliferation, present critical challenges in fruit postharvest preservation. Herein, a multifunctional photocatalytic film, CTC-Arg@CS/HPMC, is developed by incorporating chlorophyll-TiO 2 @carbon sphere (CTC) photocatalyst and L-arginine (Arg) NO donor into chitosan/hydroxypropyl methylcellulose (CS/HPMC) matrix for banana preservation. The distinctive dual heterojunction structure of CTC enhances photocatalytic activity under visible light, promoting reactive oxygen species (ROS) generation that triggers NO release from Arg. Under combined action of ROS and NO, CTC-Arg@CS/HPMC can not only inactivate bacteria with high antibacterial efficiency against Escherichia coli (93 ± 3 %) and Staphylococcus aureus (99 ± 2 %) within 60 min but also delay fruit ripening through C 2 H 4 degradation and inhibition of biosynthesis. In practical application scenario, CTC-Arg@CS/HPMC can effectively extend banana shelf-life by over 100 % at 25 °C, highlighting its potential as an active packaging material for extending the postharvest life of climacteric fruits.
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高影响因子
Environmental Science-Nano
·
2025
·
IF 5.1
Junjie Yang,Jun Xie,Junxian Qin,Jin Shang,Hiromi Yamashita,Daiqi Ye,Yun Hu
To address the critical challenges in photocatalytic CO2 reduction systems, including rapid recombination of photogenerated electron–hole pairs, indiscriminate product distribution, and oxidative degradation of liquid-phase intermediates, we designed a ZIF-8-derived Ni–Cu bimetallic modified TiO2 (NiCu-GC-TiO2) photocatalyst for synergistic formate synthesis from CO2 and ammonia nitrogen wastewater The research results indicate that Ni–Cu forms a highly dispersed interface through N bridges, significantly enhancing charge separation efficiency. In the NH3-N system at pH = 10, the formate yield reached 116.2 μmol L−1 (99.4% selectivity), which was 9.4 times higher than that of TiO2. Ammonia nitrogen serves as an oxidative substrate that accelerates hole consumption while inhibiting formate oxidation. Isotope experiments confirmed that formate protons originate entirely from ammonia nitrogen, and the protons released from ammonia nitrogen oxidation drive the directed conversion of CO2 to formate. The system can directly utilize HCO3− as a carbon source, compatible with industrial carbon capture processes. Cycling tests and flow-phase experiments demonstrated excellent material stability and practical applicability. This research provides a novel strategy for synergistic mechanisms between photocatalytic CO2 reduction and wastewater treatment, which contributes to both environmental sustainability and energy utilization.
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高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2025
·
IF 4.7
Jinxia Liang,Hongxia Chen,Kunfeng Zhang,Boyi He,Bo Peng,Baozhong Zhang,Hanyu Chen,Jingli Xu,Guofu Sun,Hongxing Dai
Herein, Ti-deficient TiO 2 was combined with oxygen-deficient BiOCl to construct a core-shell structured TiO 2 /BiOCl S-scheme heterojunction. The defect-engineered TiO 2 and BiOCl exhibited significantly enhanced tetracycline (TC) removal efficiency, which were 4.4 and 2.5 times higher than those over the defect-free TiO 2 (TiO 2 -R) and BiOCl (BiOCl-R) samples, respectively. The optimized TiO 2 /BiOCl-2 photocatalyst demonstrated the highest degradation efficiency, outperforming single BiOCl and TiO 2 by 3.2 and 2.9 times, respectively. In-depth explorations showed that the enhanced photocatalytic activity originated from the establishment of an interfacial electric field at the core/shell interface, the enhanced light utilization efficiency, and the established S-scheme charge transfer pathway. More importantly, TiO 2 /BiOCl-2 also manifested superior photocatalytic degradation efficiency when subjected to complex reaction environments. By taking into account the contributions of involved reactive species and produced intermediates, both the reaction mechanism and toxicity assessment were thoroughly explored. The present work showcases an effective strategy to improve photocatalytic efficiency by virtue of the synergy between core-shell heterojunction and defect engineering.
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高影响因子
Catalysts
·
2025
·Vol. 15
·期 3
·231
·
IF 4
Tianwei Dou,Yangyang Zhu,Zhanyu Chu,Zhijun Li,Lei Sun,Liqiang Jing
Solar-driven catalytic oxidation processes for the removal of toxic gaseous pollutants have attracted considerable scientific attention, and there is a strong desire to improve the mass transfer, photogenerated charge separation, and O2activation by regulating the structure of the photocatalyst. Initially, functionalized graphene–TiO2mesoporous hollow nanofibers have been controllably fabricated by a coaxial electrospinning technique, in which functionalized graphene is controllably prepared through a sequential diazonium functionalization and silane modification and ensures its uniform distribution among TiO2nanoparticles (NPs). Subsequently, the ultrafine Ag NPs are primarily anchored onto the surface of graphene by an in situ frozen photodeposition strategy, producing Ag/functionalized graphene–TiO2mesoporous hollow nanofibers (Ag/SiG-TO MPHNFs). The optimal Ag/SiG-TO MPHNFs exhibit 3.9-fold and 4.6-fold enhancements in CO photooxidation compared with TO MPHNFs and P25 TiO2, respectively. The enhanced photoactivity can be attributed to three factors: the creation of the mesoporous hollow structure accelerates mass transfer, the incorporation of graphene facilitates the transfer of photogenerated electrons from TiO2to graphene, and the anchoring of Ag NPs improves O2activation.
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高影响因子
PROGRESS IN ORGANIC COATINGS
·
2025
·
IF 7.3
Haleema Sadia,Wan-Juan Jiang,Pan-Feng Zheng,Yan Zang,Ze-Hua Dong
We report a novel hydroxyl-terminated polydimethylsiloxane (PDMS)-based antifouling coating that incorporates hydroxyl-terminated multi-walled carbon nanotubes (CNTs) modified with capsaicin (CAP) and titanium dioxide (TiO 2 ) nanoparticles. The CAP & TiO 2 cladding layer provides the CNTs with excellent dispersibility within the PDMS matrix, leveraging the abundant hydroxyl functionalities of both modifiers. The resulting composite displays a synergistic combination of mechanical, biocidal, and corrosion-resistant properties. Mechanical tests show a significant increase in stress-strain values and a more than sixfold rise in adhesion to the mild steel substrate. The seawater immersion test demonstrates that the PDMS-based coating containing 7 wt% CAP-TiO 2 @CNTs achieves an impressive reduction of over 97 % in protein adhesion (measured via FITC-BSA assay) and over 99 % in antibacterial performance (against E. coli and S. aureus ). Additionally, this coating significantly decreases microalgal colonization and macrofouling attachment compared to pristine PDMS coatings. Besides the excellent antifouling properties, the PDMS-based coatings also demonstrate reasonable anticorrosion properties with their |Z| 0.01Hz (impedance at 0.01 Hz) increasing from 3.57 × 10 7 Ω.cm 2 (pristine PDMS coatings) to 2.52 × 10 10 Ω.cm 2 (7 wt% CAP-TiO 2 @CNTs modified PDMS coatings). These findings may highlight the potential application of PDMS-based coating in the antifouling field of ship hulls and coastal wind power piles.
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高影响因子
ELECTROCHIMICA ACTA
·
2018
·
IF 5.116
Cheng Yang,Jin-Le Lan,Chenfeng Ding,Feng Wang,Sajid Hussain Siyal,Yunhua Yu,Xiaoping Yang
A novel three-dimensional hierarchical ternary aerogel of TiO 2 nanoparticles@porous carbon nanofibers-reduced graphene oxide (TiO 2 @PCNF-GA) was designed as an advanced anode for lithium-ion capacitors. TiO 2 @PCNFs were first fabricated by electrospinning assisted by carbonization and a post-etching process, and then assembled into reduced graphene oxide aerogels (GAs) to obtain the TiO 2 @PCNF-GAs. The uniform distribution of the ultrafine TiO 2 nanoparticles in the PCNFs inhibits the aggregation of the TiO 2 nanoparticles. Meanwhile, the interconnected three-dimensional network constructed from the TiO 2 @PCNFs and the GAs inhibits the aggregation of the TiO 2 @PCNFs. Moreover, the hierarchical porous structure of the TiO 2 @PCNF-GAs affords numerous Li-ion transport paths. Therefore, the lithium-ion capacitor composed of the TiO 2 @PCNF-GAs anode and an activated carbon cathode exhibits high energy density versus power density (79.7 Wh kg −1 versus 75 W kg −1 , 15.0 Wh kg −1 versus 15 kW kg −1 ) with superior cycle stability (93.3% retention after 10000 cycles at 5.0 A g −1 ).
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高影响因子
SOLAR ENERGY
·
2018
·
IF 4.374
Yanqi Lv,Yi Guo,Heng Zhang,Xingfu Zhou,Hongling Chen
In this study, commercial available inorganic p-semiconductor CuSCN and carbon was employed in replacing the expensive hole transport materials and noble metal electrode of the traditional perovskite solar cell, respectively. TiO 2 compact layer and the mesoporous layer were also replaced by TiO 2 nanorod arrays. The fully-air processed perovskite solar cells were easy to fabricate and demonstrated an enhanced efficiency and stability. The introduction of CuSCN improves the current density and the fill factor of the solar cell, thus leads to 29% increase in conversion efficiency. Intensity modulated photovoltage (IMVS) shows that the solar cell with CuSCN has a longer electron life time. Current attenuation curve shows that the current of the solar cell with CuSCN rises quicker and higher than that of the solar cell without CuSCN. The steady-state photoluminescence tests shows that the introduction of CuSCN layer enhances the separation of electrons and holes, thus reducing the recombination of electrons and holes. Electrochemical impedance spectroscopy (EIS) reveals that the solar cell with CuSCN has low transport resistance and high recombination resistance, thus leading to the slower electron recombination rates. In addition, study shows that the use of CuSCN and carbon displays high stability, and both kind of cells keep over 80% of the initial efficiency after 30 days without encapsulation. This method simplifies the perovskite solar cell fabrication process and opens a door toward the cheap, stable and printable solar cell.
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高影响因子
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