MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2022
·
IF 4.644
Libo Yu,Zhen Li
It is well known that the microstructure of photoanode materials has direct influence on light harvesting and charges recombination in dye sensitized solar cells (DSSC). However, design of photoanode materials for efficient light harvesting and electron transport is still in challenge. Therefore, we developed a hierarchical microstructure of multi shelled ZnO hollow microspheres (MS ZnO HMS) decorated TiO 2 nanotree (NT) for DSSCs application with aim to take advantages of enhanced light scattering and enlarged specific area offered by MS ZnO HMS and reduced charges recombination provide by TiO 2 NT. The morphology, microstructure and crystalline of ZnO HMS and TiO 2 NT have been characterized by SEM, TEM and XRD , confirming the successful building of MS ZnO HMS decorated TiO 2 NT. I–V tests show that significant enhancement of short-circuit current density (J sc ) can be achieved by controlling shell numbers of MS ZnO HMS and combining MS ZnO HMS with TiO 2 NT. As a result, the triple shelled ZnO HMS (TS ZnO HMS) decorated TiO 2 NT (TS ZnO HMS/TiO 2 NT) improve the power conversion efficiency (PCE) to 7.40%, which is 138% and 40% higher than DSSCs based on TiO 2 NT (3.11%) and TS ZnO HMS (5.27%). IPCE , OCVD and EIS measurements indicate that the combination of TS ZnO HMS with TiO 2 NT contribute to the improvement of light harvesting efficiency and prolonging of electron lifetime .
研究领域:
材料科学
·
光伏技术
·
纳米技术
·
能源材料
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2026
·
IF 4.6
Guofa Sun,Ziwei Pan,Man Zhang,Shaozhi Yang,Peng Yang,Jincheng Chen,Xie Fu,Wenqiang Lu
Lithium‑sulfur (Li-S) batteries are a highly promising energy storage technology due to their exceptionally high theoretical energy density. However, their practical implementation faces significant challenges, including sluggish redox kinetics and the troublesome shuttling of lithium polysulfides (LiPSs). In this work, a hierarchical TiO 2-x nanostructure was utilized as the sulfur host. Sulfur was uniformly integrated into the structure through a melt-diffusion infiltration process. The introduced oxygen vacancies in TiO 2-x provide strong chemical adsorption of polysulfides, effectively suppressing the shuttle effect and reducing active material loss. The nanoflower architecture-composed of interconnected nanosheets-offers a high specific surface area (104.45 m 2 g −1 ) and large pore volume (0.4698 cm 3 g −1 ). This design not only increases the number of accessible active sites but also helps accommodate volume changes during cycling. Furthermore, electron paramagnetic resonance (EPR) confirms the abundance of oxygen vacancies, which act as catalytic sites to enhance polysulfide anchoring and accelerate Li 2 S nucleation kinetics. As a result, the TiO 2-x -CNS@S cathode achieves a high initial discharge capacity of 1398 mAh g −1 at 0.1C and demonstrates remarkable long-term cycling stability. At 1C, it maintains an ultralow capacity decay rate of 0.054% per cycle over 1000 cycles. This dual-functional host design offers an effective and scalable strategy to simultaneously improve reaction kinetics and cycling durability in high-performance Li-S batteries.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Ming Xie,Yulin Tan,Zhenhua Zhi,Yanfang He,Dawei Cao
Titanium dioxide (TiO 2 ) has been extensively utilized owing to its outstanding physicochemical properties in the field of photocatalytic degradation. However, its efficiency is fundamentally limited by poor charge carrier mobility and severe recombination. These defects critically impair both charge utilization and reactive oxygen species generation. Herein, we in-situ hydrothermally grow ferroelectric barium titanate (BTO) layers on vertically aligned TiO 2 nanorod arrays (NRs), polarize the sample via an external electric field, and load graphene quantum dots (GQDs) through controlled impregnation, successfully constructing a TiO 2 /BTO-Polarized/GQDs (TiO 2 /BTO-P/GQDs) heterostructure. An external electric field induces a stable depolarization field in the BTO layer, creating a persistent interfacial driving force that enhances charge extraction from TiO 2 while suppressing bulk and surface electron-hole recombination. The BTO layer further acts as an electron transfer highway, efficiently channeling photogenerated electrons to GQDs. The π-conjugated system of GQDs serves as both an electron accumulation platform and a chemically active surface, facilitating pollutant adsorption and activation, thereby synergistically accelerating degradation kinetics through combined electron storage and catalytic effects. TiO 2 /BTO-P/GQDs demonstrated a 2.06-fold higher (OTC) degradation efficiency (82.5%) compared to unmodified TiO 2 (40%) within 90 min. This study provides novel insights into ferroelectric polarization-enhanced photocatalytic degradation efficiency. Implication This work presents a highly efficient, stable, and recoverable photocatalyst (TiO 2 /BTO-P/GQDs) for degrading persistent antibiotic pollutants like oxytetracycline in water. By enabling effective solar-driven remediation of agricultural wastewater, it offers a promising strategy to mitigate antibiotic contamination, protect aquatic ecosystems, and reduce risks to microbial communities and human health associated with residual antibiotics in the environment.
✓ 已验证
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2026
·
IF 5.2
Di Yang,Jie Cai,Md Rayhan,Qiuping Fu,Lulu Xiong,Danping Chen,Zhenchao Wang,Bingqian Liu
First application of Cu 3 (BTC) 2 -based composite as a photoelectrochemical platform for trace-level lead ion detection. • Synergistic integration of DNAzyme amplification and exciton-plasmon interaction for enhanced sensitivity. • A Weighted Least Squares (WLS)-based calibration framework to minimize matrix effects, ensuring reproducible and reliable outcomes. The accurate monitoring of lead ions (Pb 2+ ) in complex environmental matrices demands ultrasensitive and robust sensing technologies. Herein, we engineer a DNAzyme-driven “signal-on” photoelectrochemical (PEC) aptasensor based on a precisely controlled layer-by-layer self-assembled TiO 2 /Cu 3 (BTC) 2 hierarchical architecture. By exploiting the spatial precision of this architecture, we position Au nanoparticles (AuNPs) in optimal proximity to the Cu 3 (BTC) 2 framework to facilitate efficient exciton-plasmon interaction (EPI)-mediated photocurrent quenching. Target Pb 2+ triggers the specific cleavage of substrate DNA (sDNA), detaching the Au/PAMAM-hairpin DNA conjugates, thereby restoring the photocurrent proportionally to Pb 2+ concentration. This self-assembled platform achieves exceptional sensitivity with a broad linear range (10 −12 to 10 −6 mol/L) and an ultralow detection limit of 0.97 pM. Crucially, to mitigate heteroscedasticity and matrix interference, a weighted least squares (WLS) calibration model is integrated, which assigns higher statistical weights to low-concentration measurements, significantly enhancing quantitative reliability. The sensor demonstrates satisfactory recoveries in real water samples, establishing a standardized and robust paradigm for trace heavy metal monitoring. This study develops a DNAzyme-driven signal-on PEC aptasensor for trace Pb 2+ detection. A novel Cu 3 (BTC) 2 composite serves as the first PEC substrate for this application. It enhances charge separation efficiency. The sensor synergistically integrates exciton-plasmon interaction with DNAzyme amplification for dual signal enhancement. A WLS-based calibration framework is also incorporated. It standardizes signal processing, mitigates matrix effects, and ensures reproducible quantification in real water samples. Download: Download high-res image (109KB) Download: Download full-size image
✓ 已验证
DOI
高影响因子
ADVANCED POWDER TECHNOLOGY
·
2019
·Vol. 30
·期 9
·1920-1931
·
IF 3.25
Ting Wang,Bing–rui Li,Li–guang Wu,Yu–bing Yin,Bo–qiong Jiang,Ju–qing Lou
La 3+ - or Yb 3+ -doped TiO 2 supported on the surface of reduced graphene oxide were fabricated by adsorbed-layer nanoreactor synthesis (ANS) coupling with a solvothermal treatment to extend photocatalysis application in the advanced treatment of simulated wastewater with high salt concentration. Results showed that La 3+ or Yb 3+ could distribute in the TiO 2 lattice, only in ANS preparation with graphene oxide as the carrier, to replace Ti 4+ during the solvothermal treatment, thus introducing TiO 2 mixed-crystal and heterojunction structures in the catalysts. La 3+ or Yb 3+ caused lattice distortion structures and anionic vacancies in the TiO 2 lattice. The anionic vacancies (oxygen vacancies) might generate Ti 3+ in catalysts, thus enhancing visible-light response, due to impurity levels introduced by La 3+ or Yb 3+ . As the strong adsorption capability of the catalyst for phenol was not interfered by salt ions in the simulated wastewater, the catalysts could efficiently degrade phenol. The highest removal rate of phenol was approximately 90%.
研究领域:
环境科学
·
材料化学
·
光催化
·
水处理
·
纳米材料
·
表面化学
·
环境功能材料
✓ 已验证
DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 68
·54816-54821
·
IF 3.84
Le Zhang,Xingchun Zhou,Hongfei Huo,Wenzhu li,Feng Li,Rong Li
Herein, we introduced a method to encapsulate Pd(0) within TiO2 hollow mesoporous nanostructures. TiO2 hollow spheres offer a number of advantageous characteristics, including low cost, low toxicity, relatively high photocatalytic activity and high chemical stability. In addition, it can also effectively avoid the agglomeration and precipitation of noble metal nanoparticles in the catalytic reaction. The catalyst was characterized by TEM, XRD, XPS, ICP and VSM. We found that the catalyst presented a high activity for HDC of 4-CP under mild reaction conditions. Beyond that, the catalyst could be easily regained by an external magnet from the reaction mixture and recycled seven times without any significant loss in activity.
研究领域:
催化化学
·
环境化学
·
纳米材料
·
化学工程
✓ 已验证
DOI
高影响因子
FUEL
·
2023
·
IF 7.4
Puxiang Yan,Haiyong Wang,Yuhe Liao,Chenguang Wang
Upgrading biomass to renewable diesel and jet fuels is essential to achieve carbon neutrality. Herein, diesel and jet fuels range alkanes were produced by HAA of 2-methylfuran and furfural over solid acid SO 4 2- /TiO 2 and subsequent HDO over Pd/NbOPO 4 . A series of SO 4 2- /TiO 2 catalysts were synthesized by wetness impregnation to produce C15 fuel precursors. S/Ti-450 with a calcination temperature of 450 °C exhibited the highest activity, affording 97.9 % yield of C15 fuel precursor. Sufficient Brønsted acid sites and moderate Brønsted acid strength are responsible for the super catalytic performance of S/Ti-450. Stability studies demonstrated that S/Ti-450 could be regenerated. Furthermore, the application of S/Ti-450 in the HAA reaction was extended to other carbonyl compounds (e.g., butanal, cyclohexanone and acetone) and high yields of desired fuel precursors were obtained. Finally, C15 fuel precursor was further converted to long-chain alkanes via HDO over Pd/NbOPO 4 , yielding 85.0 % diesel and jet fuels range alkanes.
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2023
·Vol. 52
·期 19
·6284-6289
·
IF 4
Ning Zhang,Huili Li,Bo Yao,Shiyan Liu,Jun Ren,Yawei Wang,Zebo Fang,Rong Wu,Shunhang Wei
Construction of a heterojunction between quantum dots and TiO2 nanowire arrays via electrostatic self-assembly is rarely reported. In this work, mercury lamp irradiation was used to change the surface potential of WO3 quantum dots and TiO2 nanowire arrays, resulting in WO3 quantum dots tightly attached on the surface of TiO2 nanowire through electrostatic self-assembly. Photoelectrochemical measurements showed that the WO3 quantum dots formed a type II heterojunction with the TiO2 nanowire arrays rather than serving as carrier-trapping sites. In the self-assembly system, the TiO2 nanowire arrays provide a charge-transfer channel for the WO3 quantum dots, greatly improving the contribution of the WO3 quantum dots to the photocurrent. Quantitative calculations showed that the improvement of the bulk carrier-separation efficiency was the reason for the enhanced photoelectrochemical performance of the self-assembled system. The photocurrent density of the optical self-assembled system at 1.23 V (vs. RHE) was ∼5.5 times as high as that of the TiO2 nanowire arrays. More importantly, the self-assembled system exhibited excellent photoelectrochemical stability.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2023
·Vol. 13
·期 11
·7392-7401
·
IF 3.9
Jun Zhang,Xuxu Wei,Zifan Zhang,Caixia Yuan,Ting Huo,Fangfang Niu,Xiaoyu Lin,Chunli Liu,Hui Li,Zhenbin Chen
A magnetic chitosan/TiO2 composite material (MCT) was developed. MCT was successfully synthesized by a one-pot method using chitosan, TiO2, and Fe3O4. The absorption equilibrium time of MCT was 40 min in absorbing vanadium(V), the optimal adsorption pH was 4, and the maximum adsorption capacity of vanadium(V) was 117.1 mg g−1. The spent MCT was applied to photocatalytic reactions for reutilization. The decolorization rates for the degradation of rhodamine B (RhB) by new and spent MCT were 86.4% and 94.3%, respectively. The new and spent MCT exhibited absorption bands at 397 and 455 nm, respectively, which showed that the spent MCT was red-shifted to the cyan light region. These results indicated that the forbidden band widths of the new and spent MCT were about 3.12 and 2.72 eV, respectively. The mechanism of the degradation reaction showed that the hydroxyl radicals as oxidants in the spent MCT mediated the photocatalytic degradation of RhB. In addition, the superoxide anion radical formation of hydroxyl radicals was the main reaction, and the hole generation of hydroxyl radicals was the subordinate reaction. The N-de-ethylated intermediates and organic acids were monitored by MS and HPLC.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Baofang Zhang,Ziyu Zengcai,Wenting Lin,Meijin Zhang,Yunhong Pi,Tiejun Wang
Photothermal synergism can effectively activate methanol at low operating temperature and significantly reduce the activation energy of the reaction, achieving more efficiently H 2 release from methanol reforming. Here, a novel hierarchical heterojunction that integrating photo- and thermal-active Cu 2 O catalytic species with in-situ derived NH 2 -MIL-125@TiO 2 framework was specifically designed for photothermal-driven aqueous phase reforming of methanol into H 2 . The afforded Cu 2 O/NH 2 -MIL-125@TiO 2 realized an outstanding photothermal H 2 production activity (apparent quantum efficiency of 22.3 % at 365 nm), ca. 13-times higher than that of thermocatalytic condition. Interestingly, the photothermal effect did confer the Cu 2 O/NH 2 -MIL-125@TiO 2 with unexpected activity at low temperature subsided to 100 °C and accelerated the activation of MeOH/H 2 O with an obvious reduction of activation energy from 82.62 kJ·mol −1 to 52.40 kJ·mol −1 . The improvement of catalyst stability and the promotion of charge separation also contributed to a long-term photothermal H 2 evolution activity with average rate of 1.49x10 6 μmolg Cu -1 h −1 and a total turnover number (TON) up to 5971 in 63 h, almost 125-fold promotion compared with Cu 2 O.
✓ 已验证
产品关联
DOI
高影响因子
Analytical Methods
·
2023
·Vol. 15
·期 21
·2622-2630
·
IF 3.1
Liangyun Yu,Liangju Sun,Qi Zhang,Jingjing Zhang,Bairen Yang,Mingquan Huang,Yawen Zhou,Baocai Xu,Xiaoya Hu
This study developed an electrochemical sensor for the determination of Mn2+ in Chinese liquor by modifying a glass carbon electrode with TiO2-NH2@COFDPTB, which was synthesized via the controllable growth of COFDPTB onto the surface of TiO2-NH2 using the Schiff-base condensation reaction between 2,5-dimethoxyterephthalaldehyde and 1,3,5-tris(4-aminophenyl)benzene. The morphological and structural characterization studies of the proposed TiO2-NH2@COFDPTB were carried out by SEM, TEM, HRTEM, EDX, BET, XRD and FTIR techniques. Owing to the excellent properties and the synergism between TiO2 and COFDPTB, the introduction of TiO2-NH2@COFDPTB improved the electrochemical response significantly. By optimizing the experimental parameters, the sensor exhibited good linearity in the range of 0.1–1.0 nM and 0.08–10 μM with a detection limit of 2.83 × 10−11 M and 9.50 × 10−9 M, respectively, showing competitive performance for Mn2+ determination. Besides, the proposed sensor was successfully applied to Mn2+ detection in liquor samples, suggesting its practical application performance.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
GIANT
·
2023
·
IF 7
Xin Xu,Hongli Hu,Hangyu Zhong,LinGe Wang,Bo-xing Zhang
In recent decades, the sol-gel process accompanied with phase separation has been employed to fabricate porous monolithic ceramic materials. However, it is challenging to obtain crack-free samples by using this method, due to the fragile nature of porous ceramic materials and the large internal stress generated from drying and calcination process. In this work, tough monolithic titania (TiO 2 ) materials were fabricated by the sol-gel process accompanied with phase separation in solutions of silicon carbide (SiC) nanofibers and preceramic polymers. It was found that polyethylene oxide (PEO) and ethylenediamine (EDA) can promote phase separation and sol-gel process respectively, and the micro-morphology of porous monolithic TiO 2 materials can be flexibly tuned by adjusting the contents of PEO and EDA. The addition of SiC nanofibers effectively enhanced the mechanical performance and photocatalytic activity of porous TiO 2 materials without altering their bicontinuous micro-morphology. Taking TiO 2 materials as an example, this work demonstrates a novel methodology to fabricate ceramic nanofibers reinforced porous monolithic ceramic materials.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）