SOLAR ENERGY MATERIALS AND SOLAR CELLS
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2024
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IF 6.3
Yu Song,Xiaolin Qiu,Huaxuan Liu,Yu Han
Micro-encapsulated/macro-encapsulated phase change materials (Micro/MacroPCMs) are attractive environmental energy materials since they can be integrated into building materials, textile fabrics and heat-insulating materials to give their solar energy storage capacities and improve their temperature adjustment abilities. An innovative set of Micro/MacroPCMs has been designed using natural polymers, showcasing prowess in solar energy storage and UV protection. The eco-friendly bifunctional MicroPCMs are made up of paraffin as core and titanium dioxide (TiO 2 )-modified chitosan (CS) as shell. Their energy efficiency was elevated using a double emulsion technique. Alginate (ALG), an anionic polysaccharide, was selected as the matrix of the MacroPCMs to provide an enhanced combination with the cation polysaccharide CS shell. The surfaces and structures of the Micro/MacroPCMs were observed through SEM and image measurement (IM). Their chemical profile was deciphered using FTIR and XRD. Ultraviolet–visible spectrophotometry evaluated their UV resistance. DSC, TGA, and infrared thermography delved into their thermal attributes, while a texture analyzer revealed the mechanical strength of the MacroPCMs. The introduction of TiO 2 resulted in a greater effective enthalpy and thermal stability. The energy storage ability of the MicroPCMs was further improved by using a double emulsification system. Notably, MicroPCMs crafted with TiO 2 -infused CS using the double emulsion approach stood out, boasting an impressive PCM content of 81.3 %, a melting enthalpy of 125.5 J/g, and commendable UV and thermal regulation capacities. With their robust thermal performance and mechanical resilience, these eco-friendly difunctional Micro/MacroPCMs emerge as prime contenders in solar energy conservation and temperature control applications.
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CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Guoquan Zhang,Shaowei Hu,Xiaoyu Zhu,Xiaoxin Hu,Fenglin Yang
An interlocking “ T -shape” structure was built by uniform filling β-PbO 2 crystalline inside the trace Ti 3+ self-doping TiO 2 nanotube arrays (TNAs) channels and depositing the cauliflower-like β-PbO 2 clusters on its upper surface through a facile current pulse deposition method. We elaborated the interfacial engineering strategy for generating compact oxide layers at TNAs bottoms and growing β-PbO 2 crystalline from the selectively conductive TNAs bottoms. Different characterization techniques and electrochemical analyses were conducted to characterize the morphology, structure, and electrochemical property of the β-PbO 2 partial filling/covering TNAs (β-PbO 2 /TNAs/Ti) materials. We also systematically investigated and elucidated the performance and mechanism of β-PbO 2 /TNAs/Ti anode activated peroxymonosulfate (PMS) system via berberine removal/mineralization, reactive oxygen species (ROS) identification/contribution, intermediates analysis, energy consumption and practical applicability estimation. Results illustrated that filling β-PbO 2 inside TNAs can efficiently improve the directional electron-transfer efficiency, oxygen evolution over-potential, tolerance to the varied water matrices and service lifetime of β-PbO 2 /TNAs/Ti anode activated PMS system. The ROS including • OH, S O 4 ∙ - and 1 O 2 that generated from PMS electro-activation are responsible for efficient berberine degradation through two pathways. This study will provide a general approach to construct the versatile tube-filled TNAs-based materials for wide applications in water/wastewater treatment.
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JOURNAL OF SOLID STATE CHEMISTRY
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2025
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IF 3.5
Jiao Men,Zhuo Dong,Yushan Li,Xiaoying Xie,Chenxi Zhang,Yanhong Qiao,Jingbo Zhang
Vacuum ultraviolet (VUV) with a wavelength of 172 nm was employed to prepare amorphous Zn-doped TiO 2 (ZTO) thin films using titanium tetraisopropoxide as a precursor to form TiO 2 and zinc(II) dibutyldithiocarbamate as a Zn doping source. During the VUV irradiation on the precursor films, the incorporation of zinc and the departure of nitrogen and sulfur enhance the conductivity and electron mobility of the thin films. The prepared ZTO thin films were used as the electron transport layer to fabricate mesoporous perovskite solar cells (PSCs). The optimal doping molar ratio of zinc was determined to be 2 % according to the photoelectric performance of PSCs based on the ZTO thin films. The improved interfacial contact between the ZTO electron transport layer and the electrode substrate reduces the interfacial charge transfer resistance. The synergistic effect of ZTO electron transport layer enhances the power conversion efficiency (PCE) of PSCs from 18.28 % to 21.21 %. In addition, the ZTO thin film was used as the compact layer in quantum dot-sensitized solar cells, significantly improving their performance. Therefore, the VUV irradiation technique is a general method to prepare the doping metal oxide thin films for fabricating high efficiency solar cells with the compact thin film structure.
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JOURNAL OF FOOD SCIENCE
·
2024
·Vol. 89
·期 5
·2879-2894
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IF 3.2
Mahsa Kheirandish,Majid Javanmard dakheli,Maryam Mizani,Alireza Salehirad
The aim of this study was the synthesis of bimetallic nanoparticles based on Fe 2 O 3 /TiO 2 and its use in the poly(lactic acid) (PLA) films as an oxygen scavenger in extra virgin olive oil (EVOO) packaging. Bimetallic nanocomposites were prepared by two different precipitation methods (precipitation with ammonia and sodium hydroxide). The characteristics of bimetallic nanoparticles precipitated with sodium hydroxide (Na-Ti 0.01 Fe 0.048 O 0.08 ) and bimetallic nanoparticles precipitated with ammonia (NH-Ti 0.01 Fe 0.022 O 0.09 ) were compared. Relative amounts of elements in bimetallic nanocomposites and their morphological characteristics were determined using field emission scanning electron microscopy coupled with energy-dispersive X-ray spectrometer. Porosity volume and surface area of bimetallic nanoparticles were calculated using adsorption–desorption isotherms and the Brunauer–Emmett–Teller method. The formation/characterization of bimetallic nanoparticles and their location in the matrix of PLA-based nanocomposite film was studied using X-ray diffraction and Fourier transform infrared. In nanocomposite films based on PLA, bimetallic nanoparticles lead to better oxidative stability (peroxide value, p -anisidine index, K 232 , and K 270 ) of the EVOO and oxygen scavenging during storage compared to free nanoparticles. Mechanical properties of nanocomposite films were improved due to bimetallic nanoparticles, which were better for Na-Ti 0.01 Fe 0.048 O 0.08 . In vitro release modeling of the bimetallic nanoparticles in EVOO proved that Fickian diffusion is the dominant mechanism, and the Peleg model was the best description of the release behavior of nanoparticles.
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PubMed
高影响因子
APPLIED CATALYSIS A-GENERAL
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2024
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IF 4.7
Chen Li,Liting Wei,Min Chen,Jiayi Zhang,Yang Yang,Boping Liu,Yulong Jin
CrO x /VO x /TiO 2 -SiO 2 was prepared via solvent-free and conventional wet-impregnation process with ethanol as solvent. The results of ICP-OES, N 2 adsorption-desorption, SEM-EDX, Raman and DR-Uv-vis spectra indicate that well-dispersed Cr and V sites in isolated state were the main species. Bimodal ultra-high molecular weight polyethylene/high-density polyethylene in-reactor blends (UHMWPE/HDPE IRBs) could be synthesized with polymerization activity ＞ 1×10 7 gPE·mol −1 Cr·h −1 . Moreover, the two catalysts displayed similar catalytic behaviors in temperature sensitivity, H 2 response and 1-hexene copolymerization efficiency, and their polymer products also show comparable molecular weight and molecular weight distribution , which implies analogous structures of their well-dispersed active sites. By contrast, the catalyst prepared by wet-impregnation process with water as solvent exhibited poor dispersity, which is reflected by its much lower activity and very different catalytic behaviors and polymer properties when compared with the well-dispersed catalysts. Therefore, the economic and green solvent-free process is promising for preparing highly-active CrO x /VO x /TiO 2 -SiO 2 .
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MICROCHEMICAL JOURNAL
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2025
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IF 5.1
Qianqian Bian,Xiaoxia Zhang,Xiaodi Zhang,Naiyue Zhang,Yifeng E,Peng Chen,Li Li,Kun Qian
Rapid and accurate detection of glutamic acid has always been our focus. Herein, we propose a non-enzymatic electrochemical sensor based on low-cost double transition metal oxides to detect glutamic acid efficiently. In this study, LTA nano-zeolite cages are synthesized by hydrothermal method. To further improve the conductivity, TiO 2 and Co metal nanoparticles are combined with nano-zeolite cages with multiple electrocatalytic sites to form TiO 2 -Co/LTA NPs. Powder X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), energy dispersive X-ray spectroscopy (EDX), scanning electron microscopy (SEM) and high-resolution projection electron microscopy (TEM) were used to characterize the materials before and after adsorption and oxidation of glutamic acid. Cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and differential pulse voltammetry (DPV) were used to test the oxidation and adsorption properties of the modified sensor after adding glutamic acid. Under the optimal pH condition, the sensor detection range is 3.0 × 10 −12 –3.0 × 10 −8 M and the detection limit (LOD) can reach 1.0 × 10 −12 M. In addition, the sensor has good selectivity for glutamic acid, even in the presence of multiple other amino acids. The practical application shows that the sensor can be used to detect glutamic acid in milk, seawater and serum samples with a recovery rate of 90.0 % to 110.0 % and RSD <4 %. We anticipate that this work will provide new ideas for the development of third-generation non-enzymatic sensors for glutamic acid monitoring.
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SENSORS AND ACTUATORS B-CHEMICAL
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2025
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IF 7.7
Shengqiao Gao,Qingyi Wei,Hongbin Pu
Heterojunction-like substrates have drawn significant attention in surface enhanced Raman spectroscopy (SERS) owing to their multi-enhancement characteristics. In this study, the core-shell architectures of UiO-66@ TiO 2 were fabricated for capture and enrichment of organophosphorus pesticides (OPs) in solution. After absorption of OPs, the SERS-active nanoparticles of Au were assembled on the core-shell architectures to form UiO-66@TiO₂/Au substrate via Au-S bonding between OPs molecule and AuNPs and electrostatic interactions between UiO-66@TiO 2 and Au, resulting in adsorption-induced aggregation of Raman signal for OPs. The proposed method of adsorption-induced aggregation could be used for detecting thiamethoxam and triazophos in apple juice with detection limit of 3.51 μg/L and 0.66 μg/L, respectively. Furthermore, the satisfactory recovery rates, ranging from 91.98 % to 104.31 % for thiamethoxam and from 91.47 % to 116.47 % for triazophos, indicated that the prepared heterojunction-like substrate could be potentially used for trace detecting OPs in foods.
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ACS Applied Nano Materials
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2025
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IF 5.5
Yiqun Su,Mian Gong,Yipeng Liu,Faiz Ullah Shah,Aatto Laaksonen,Rong An
Titanium dioxide (TiO2) nanostructures exhibit exceptional flexibility for integration into surface-enhanced Raman spectroscopy (SERS) sensing platforms enabling nanoscale trace detection of biomolecules with high sensitivity. However, fabricating TiO2 nanomaterials for large-scale SERS applications remains challenging due to the high cost and complexity of synthesis methods. In this study, we demonstrate a cost-effective and scalable approach using commercial TiO2 P25 nanoparticles as the SERS substrates, functionalized with a phosphonium-based fluorine-free ionic liquid (IL) comprising the trihexyl(tetradecyl)phosphonium cation ([P6,6,6,14]+) with four long alkyl chains and the 2–2-(2-methoxyethoxy)ethoxy anion ([MEEA]−). This IL serves as a nanoscale “linker”, effectively bridging Cytochrome c (Cyt c) molecules with TiO2 nanoparticles, significantly enhancing the Cyt c–TiO2 interactions and SERS signal intensity. The optimized system achieves remarkable sensitivity, enabling the detection of Cyt c concentrations as low as 5 × 10–4 M, with an enhancement factor increased by 1 order of magnitude compared to the control system. This work stresses the importance of nanoscale interactions and offers an alternative straightforward strategy for trace protein detection using commercially available TiO2 P25 nanoparticles, thus circumventing the need for complex nanomaterial fabrication methods.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Ze Luo,Qingxin Liang,Yuanshuai Qi,Guoqiang Huang
There is an urgent need for efficient and cost-effective adsorbents for the removal of trace hydrogen phosphide (PH 3 ) from the circular hydrogen systems in the polysilicon chemical vapor deposition furnaces. In this study, a straightforward and cost-effective method was used to synthesize a highly efficient adsorbent (Ce x -Cu y /TiO 2 ) for PH 3 removal using TiO 2 as the carrier and CuO as the active substance. Experimental findings demonstrated that optimal Ce doping amounts (n Cu :n Ce = 20:1) markedly enhanced the adsorbent's performance, with an adsorption capacity reaching as high as 149.14 mg g −1 . Material characterization results indicated that Ce positively influenced the uniform dispersion of Cu on the TiO 2 surface, and Ce doping increased the adsorbed oxygen content of the adsorbent, consequently enhancing its oxidation performance. The investigation of the reaction mechanism and causes of adsorbent deactivation revealed that the depletion of active substances (CuO) in the adsorbent and the accumulation of products such as Cu 3 P and phosphates are the primary factors contributing to its deactivation. Furthermore, high-temperature calcination could restore the activity of the adsorbent, indicating its great potential for engineering applications.
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NEW JOURNAL OF CHEMISTRY
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2025
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IF 2.5
Jian-Wu Xiao,Li-Wang Jiang,Yu-Ma Yang,Yun-Feng Zhu,Fu-An He,Dong-Dong Mai
Superhydrophobic electrospun films for oil–water separation, particularly those with multiple functions such as magnetism, catalysis, and piezoelectricity, have received widespread attention. In this work, a novel electrospun superhydrophobic magnetic CoFe2O4@TiO2/polyvinylidene fluoride (PVDF) composite film was fabricated. Firstly, a CoFe2O4@TiO2 hybrid filler was prepared by a simple and effective solvothermal method, and its structure and magnetism were confirmed by different characterization techniques. Secondly, the electrospun CoFe2O4@TiO2/PVDF composite film was prepared and then modified with trimethoxy(1H,1H,2H,2H-heptadecafluorodecyl)silane (HFDS) to form the electrospun HFDS-CoFe2O4@TiO2/PVDF composite film. The resulting HFDS(2 wt%)-CoFe2O4@TiO2(30 wt%)/PVDF composite film was found to be superhydrophobic and could achieve oil–water separation by gravity filtration and direct absorption, with absorption capacities for valorous oils ranging from 7.7 g g−1 to 8.2 g g−1. The crystallinity degree of the polar piezoelectric β- and γ-form crystals of PVDF in the HFDS(2 wt%)-CoFe2O4@TiO2(30 wt%)/PVDF composite film was 25.1%, whereas the corresponding value of the pure PVDF solid film was only 14.3%. In addition, the HFDS(2 wt%)-CoFe2O4@TiO2(30 wt%)/PVDF composite film exhibited a magnetization strength of 0.69 emu g−1 at 20 000 Oe and could catalyze the degradation of Sudan Red dye. The multi-functional CoFe2O4@TiO2/PVDF composite film demonstrates its potential for various applications in oil–water separation and other fields.
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MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
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2025
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IF 4.6
Yaqi Wu,Jianhua Qian,Jinjuan Xing,Junhua Li,He Huang,Yanan Wang,Xueming Kang,Lijuan Wang,Jiasheng Xu
Volatile organic compounds (VOCs), as hazardous environmental pollutants emitted from chemical industries, cause significant threats to human health and ecological environment owing to their inherent toxicity and carcinogenicity. Catalytic oxidation has emerged as a promising technology for VOC elimination, enabling complete degradation of pollutants into CO 2 and H 2 O. This study investigates transition metal oxide (TMO x , TM = Mn, Co, Fe, Ni, Cu, Zn)/TiO 2 catalysts for toluene degradation. Since the catalytic efficacy of TiO 2 -based catalysts critically depends on the quantity of surface oxygen vacancy (O v ) in heterogeneous processes, we engineered O v -rich interfaces by breaking atomic periodicity arrangements and generating unsaturated coordination sites. These structural modifications enhanced oxygen migration rates and increased reactive oxygen species availability. Among the synthesized catalysts, CuO/TiO 2 exhibited the highest performance, achieving 90 % toluene conversion (T 90 ) at 286 °C under a weight hourly space velocity (WHSV) of 20,000 mL/(g·h) with an initial toluene concentration of 1000 ppm. The measurement of in-situ DRIFTS suggested that toluene oxidation process abided by the path of toluene → benzaldehyde → benzoic acid → anhydride →CO 2 and H 2 O. Furthermore, the by CuO/TiO 2 catalyst demonstrated great reusability, and long-term stability, highlighting its potential for industrial-scale VOC abatement applications.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
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IF 9
Jiayu Feng,Ruoxu Liu,Xuejin Yang,Shuo Cui,Rui Cao,Ping Ning,Fang Wang,Zibin Pan,Lijuan Jia
Efficient removal of the highly toxic gas phosphine (PH 3 ) from various exhaust gases is a major challenge. To address this, we developed a cost-effective NiO/TiO 2 adsorbent (Ni X /TiO 2 ) via facile impregnation, achieving efficient anaerobic PH 3 removal at a low temperature (350 °C) with an exceptional breakthrough capacity of 232.23 mg(PH 3 ) g −1 . Characterization revealed that superior performance stems from abundant surface basic sites, developed porosity, and strong NiO-TiO 2 interfacial interactions promoting PH 3 adsorption and dissociation. During PH 3 capture, phosphorus incorporation transforms active NiO into Ni 2 P species, leading to adsorbent deactivation. Crucially, recognizing the photocatalytic potential of both TiO 2 and Ni 2 P, we repurposed the spent adsorbent as a Ni 2 P/TiO 2 heterojunction photocatalyst. Proof-of-concept experiments demonstrated its high efficacy in visible-light-driven wastewater treatment, achieving 91 % degradation of malachite green (MG). This work advances PH 3 purification technology while establishing a sustainable circular economy strategy via repurposing deactivated adsorbents into photocatalysts, aligning with resource conservation and recycling.
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