CHEMOSPHERE
·
2021
·
IF 7.086
Hangjun Zhang,Yinan Zhang,Yuchi Zhong,Jiafeng Ding
Polychlorinated dibenzo-p-dioxins (PCDDs), characterized by their extreme toxicity, high persistency and bioaccumulation, regard as one of the most concerned environmental pollutants on the priority list. In this study, microwave-hydrothermal and photoreduction methods were adopted for fabrication of ternary Au@Fe/TiO 2 composites for removal of 2,8-dichlorodibenzo-p-dioxin (2,8-DCDD) under UV–Vis light irradiation. The acquired materials were characterized and analyzed by XRD, TEM, XPS, UV–Vis DRS, PL , etc. As a result, the 1%Au@1%Fe/TiO 2 exhibited much higher photocatalytic activity that 96.3% of 2,8-DCDD was removed within 160 min with respect to that of Fe/TiO 2 (3.0 times) and TiO 2 (5.5 times). It revealed the active substances might be produced, which were verified by ESR analysis. In a comparison, the 1%Au@1%Fe/TiO 2 also exhibited high activity in that 97.2% of 2,8-DCDD was removed within 240 min under an anoxic atmosphere. The 1%Au@1%Fe/TiO 2 systems were all pH-dependent that 2,8-DCDD could be fully degraded in neutral conditions. The results of repeatability on 1%Au@1%Fe/TiO 2 showed that the sample was high stability. Fe doping improved the charge separation of TiO 2 and Au modification improved the activity via SPR effect and Mott-Schottky barrier. The degradation mechanisms and pathways were proposed and discussed in detail. The current work develops a new approach on photocatalytic oxidation and reductive dechlorination of dioxins and may open a new opportunity to extend the application range of TiO 2 catalysts.
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DOI
高影响因子
Journal of Physical Chemistry C
·
2018
·
IF 4.484
Xing Xu,Lei Lai,Tao Zeng,Yan Yu,Zhiqiao He,Jianmeng Chen,Shuang Song
The exploration of low-cost, high-performance, and stable photocatalysts for the highly efficient conversion and storage of solar energy in hydrogen is of great importance. This study presents a novel pyridine-type carbonitrides (CN)-modified surface-disordered C-doped TiO2 (PCN/CTiO2@TiO2–x) catalyst used for photocatalytic H2 evolution from water. The employed preparation method of hydrolysis–calcination has the advantages of low-cost raw materials and easy scale-up. The optimized PCN/CTiO2@TiO2–x exhibited an impressive hydrogen evolution rate of ∼3743 μmol h–1 g–1 under simulated solar light (AM 1.5) and remained stable after five cycles. The maximal quantum efficiency reached 37.5% at 370 nm and 7.0% at 400 nm, which was superior or comparable to several reported relevant TiO2-based catalysts. Benefiting from the pyridine-type CN modification, disordered surface layer (TiO2–x), and increased oxygen vacancies/Ti3+ species, the photogenerated electrons moved rapidly from the visible-response C-doped TiO2 to CN to participate in the photoreduction reaction, which led to a marked improvement in the catalytic activity.
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高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Hongyang Ye,Zengyao Guo,Suli Wu,Bingtao Tang,Shufen Zhang
Monodisperse titanium dioxide (TiO 2 ) colloidal nanospheres, which possess a high refractive index (RI), are ideal building blocks for fabricating colloidal photonic crystals (CPCs) with structural colors. However, the intrinsic surface property, especially the low surface charge density, hinders them from assembling into CPCs with long-range ordered structures. Herein, we develop a surface modification strategy aimed at improving the surface potential of monodisperse TiO 2 nanospheres by utilizing vinyltriethoxysilane (VTES) as the modifier. XPS analysis reveals that the VTES molecules attach to the TiO 2 surface via Ti-O-Si chemical bonds and the presence of additional Si-OH groups, which can increase the surface potential. The as-synthesized VTES-modified TiO 2 nanospheres are subjected to calcination to increase their RI by crystallizing into the anatase phase. CPCs with bright and tunable structural colors throughout the visible range are successfully fabricated by utilizing the monodisperse VTES-modified TiO 2 or anatase-TiO 2 nanospheres as building blocks by self-assembly through a dip coating method.
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Hengzhuo Cai,Shengcheng Wu,Zixi Liu,Junfeng Lin,Xubing Lu,Xingsen Gao,Jun-Ming Liu,Sujuan Wu
All-inorganic CsPbI x Br 3-x perovskite solar cells (PSCs) exhibit excellent thermal stability and high efficiency, but their power conversion efficiency (PCE) remains lower than that of organic–inorganic hybrid PSCs. This is primarily due to the significant open-circuit voltage (V oc ) loss at the buried interface of electron transport layer (ETL) and perovskite film. Moreover, low-temperature processed TiO 2 ETL simultaneously suffers from more trap-states which will deteriorate the PCE and stability of PSCs. To solve these issues, zinc acetate (Zn(OAc) 2 ) is employed to optimize the TiO 2 /CsPbI 2 Br buried interface to reduce the V oc loss and improve the PCE and device stability. This Zn(OAc) 2 interfacial modification0020increases the V oc about 90 m V from 1.159 V to 1.248 V. Consequently, Zn(OAc) 2 -modified CsPbI 2 Br PSCs (Target I-PSCs) achieve a champion PCE of 14.91 % with a fill factor over than 80 %, which is significantly higher than the 12.25 % of reference I-PSCs. A series characterizations confirm that the improved performance is attributed to the increased electrical conductivity of the modified TiO 2 film, the passivated defects on the TiO 2 surface and the uncoordinated Cs + /Pb 2+ traps at the bottom of CsPbI 2 Br film, as well as the optimized the energy level alignment to facilitate electron transport and collection. This work provides a feasible strategy to fabricate efficient and stable CsPbI 2 Br I-PSCs by modifying the TiO 2 /CsPbI 2 Br buried interface by Zn(OAc) 2 .
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高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Kaihui Hua,Zhijing Wu,Weijie Chen,Yu Zheng,Xiuan Xi
Despite extensive research on TiO 2 -based photocatalysts, their poor visible-light response and low charge-separation efficiency still limit practical applications in wastewater treatment. While previous studies have explored individual strategies such as metal doping or defect engineering, few have systematically investigated their synergistic effects in TiO 2 porous ceramics. This study addresses these challenges by developing a dual-modification strategy combining ZnO doping and NaBH 4 reduction to enhance the photocatalytic performance of TiO 2 porous ceramics. ZnO doping promotes anatase phase stability and inhibits the anatase-to-rutile transition, while NaBH 4 reduction introduces abundant oxygen vacancies and Ti 3+ species, narrowing the band gap and extending light absorption into the visible range. As a result, the optimized ceramics achieve a methylene blue degradation efficiency of 90.07%, outperforming undoped (79.32%) and singly ZnO-doped (86.01%) counterparts. This synergistic enhancement is attributed to the tailored surface chemistry and electronic structure, verified through structural and optical characterizations. Compared with previous TiO 2 porous ceramic studies, this work provides a scalable and effective modification strategy, offering new insights for designing high-efficiency, recyclable photocatalysts for environmental remediation.
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高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2024
·
IF 0
Cheng Rong,Xia Jin-cheng,Shen Liang-jie,Shen Zhi-peng,Shi Lei,Zheng Xiang,Zheng Jian-zhong
Photocatalytic disinfection is a promising technology with low cost and high efficiency. However, most of the current studies on photocatalytic disinfection ignore the widespread presence of natural organic matter (NOM) in water bodies, so the incomplete conclusions obtained may not be applicable. Herein, this paper systematically studied the influence of humic acid (HA), one of the most important components of NOM, on the photocatalytic inactivation of bacteriophage f2 with electrospinning Cu-TiO 2 nanofibers. We found that with the addition of HA, the light transmittance of the solution at 550 nm decreased from 94 to 60%, and the band gap of the photocatalyst was increased from 2.96 to 3.05 eV. Compared with reacting without HA, the degradation amount of RNA of f2 decreased by 88.7% after HA was added, and the RNA concentration increased from 1.95 to 4.38 ng·μL −1 after the reaction. Hence, we propose mechanisms of the effect of HA on photocatalytic disinfection: photo-shielding, passivation of photocatalysts, quenching of free radicals, and virus protection. Photo-shielding and photocatalyst passivation lead to the decrease of photocatalyst activity, and the reactive oxygen species (ROSs) (·OH, ·O 2 − , 1 O 2 , H 2 O 2 ) are further trapped by HA. The HA in water also can protect the shape of phage f2 and reduce the leakage of protein and the destruction of ribonucleic acid (RNA). This work provides an insight into the mechanisms for the influence of HA in photocatalytic disinfection process and a theoretical basis for its practical application.
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DOI
PubMed
RESEARCH ON CHEMICAL INTERMEDIATES
·
2025
·
IF 3.5
Li Zhen,Guo Guizhang,Yu Zhou,Ma Zengyue,Yu Libo
In the pursuit of highly efficient hydrogen production through photoelectrochemical water splitting, expanding the utilization of the visible spectrum and extending the lifetime of photogenerated electrons are crucial challenges for improving the efficiency. To address these challenges, we prepared CdS sensitized TiO 2 photoanodes using a one-step hydrothermal method, employing thioglycolic acid (TGA) and mercaptopropionic acid (MPA) as linkers. The successful synthesis of CdS QDs and the CdS/TiO 2 photoanode was confirmed through various characterization techniques, including transmission electron microscopy (TEM), X-ray diffraction, and scanning electron microscopy. Performance evaluations revealed that the TGA-decorated CdS/TiO 2 photoanode exhibited superior photocurrent density and stability compared to the MPA-modified counterpart. Notably, its applied bias photo-to-current conversion efficiency was 1.7 times greater than that of the MPA-modified CdS/TiO 2 photoanode. Furthermore, UV–visible absorption spectrum analysis demonstrated that the incorporation of CdS QDs significantly broadened the spectral response of the TiO 2 photoanode, extending it from the ultraviolet to the visible range. This enhancement is crucial for improving light harvesting capabilities. Additionally, our analysis of electron lifetime indicated that the shorter molecular chains of TGA effectively minimize the transfer distance for photogenerated electrons from the CdS QDs to the TiO 2 , resulting in improved electron lifetimes and, consequently, enhanced photocurrent density.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2025
·
IF 2.5
Wenxin Yang,Dongxue Han,Zhonghui Sun,Zhishan Liang,ziqian He
Ascorbic acid (AA) is a very common and important antioxidant, widely present in various daily foods, and more importantly, it is an indispensable vitamin in the human body. In this study, a 980 nm near-infrared (NIR)-driven Ti₂O₃-TiO₂-based photoelectrochemical (PEC) sensor was developed for the selective and sensitive detection of AA. Upon 980 nm irradiation, a heterojunction is established between the tetravalent (Ti⁴⁺) and trivalent (Ti⁺) titanium oxides in the Ti₂O₃-TiO₂ photoactive semiconductor. This heterojunction enhances the separation of photogenerated electron-hole pairs and accelerates electron transport. Due to its low redox potential, AA can reduce Ti⁴⁺ to Ti3+, leading to a reversal in the direction of photogenerated electron flow within the semiconductor. The material changes from an n-type semiconductor to a p-type semiconductor, resulting in the phenomenon of photocurrent polarity reversal in PEC only in the presence of AA. At the same time, the sensor has a wide detection range of 1 - 302 μM for AA and the detection limit is 0.43 μM. All of these make it possible to use it for the detection of AA content in real rat cerebrospinal fluid and human plasma, with high recovery rates and low relative standard deviations. This approach holds great potential as an accurate and convenient method for medical detection of AA levels in the human body.
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Qiao Zhang,Chunxi Hai,Zhiqiang Zhu,Xuemei Zhuo,Yanxia Sun,Shengde Dong,Luxiang Ma,Xin He,Qi Xu,Yuan Zhou
The layer-structured titanium oxide lithium ion sieve (TiO 2 ·H 2 O) is regarded as one of the most promising adsorbents for recovering Li + from low-grade brines with high Mg 2+ /Li + ratios and low lithium concentrations. This is due to its exceptional theoretical lithium adsorption capacity and outstanding stability. Nevertheless, its prolonged adsorption equilibrium time, frequently in excess of 72 h, has constrained its large-scale practical application, thus confining its utilization primarily to laboratory settings. To address this challenge, we have developed a Ce-doped TiO 2 ·H 2 O adsorbent through a simple in-situ calcination method. The as-prepared adsorbents have been shown to achieve a high adsorption capacity of up to 58.42 mg/g within 10 h in a 700 ppm LiOH solution, while exhibiting a very low Ti 4+ dissolution loss rate of around 0.6 %. It is noteworthy that the Ce doping process resulted in a 14 % enhancement in adsorption capacity, accompanied by a substantial improvement in the desorption/adsorption kinetics and selectivity of the TiO 2 ·H 2 O lithium adsorbents. In summary, this study presents a novel methodology for accelerating the Li + sorption in Ti–O frameworks derived from natural brines, which provides valuable insights for enhancing the practical applicability of TiO 2 ·H 2 O.
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高影响因子
METHODS
·
2019
·
IF 3.782
Hongshun Hao,Shouchen Hao,Hongman Hou,Gongliang Zhang,Yunxia Hou,Zuowei Zhang,Jingran Bi,Shuang Yan
A novel photoelectrochemical (PEC) immunosensor based on CdSe quantum dots (QDs) sensitized Ho 3+ /Yb 3+ -TiO 2 for the detection of Vibrio parahaemolyticus (VP) was assembled. The working electrode was constructed via the layer-by-layer (LBL) method with the Ho 3+ /Yb 3+ -TiO 2 , CdSe QDs, NHS/EDC, antibody of VP (anti-VP), bovine serum albumin (BSA) modified on the surface of the FTO in sequence. Ascorbic acid (AA) acts as an electron donor to combine photogenerated holes in order to provide a stable current system. Ho 3+ and Yb 3+ co-doping TiO 2 broadened the spectral response range of TiO 2 to the infrared region and improved the photocurrent responsiveness of TiO 2 . The PEC immunosensor, with Ho 3+ /Yb 3+ ratio of 1:5, Ho 3+ /Yb 3+ -TiO 2 of 2 mg/mL and PBS solution of pH 7.4, had an optimal photocurrent responsiveness. Immobilization of anti-VP was by classical NHS/EDC coupling reactions between COOH groups of CdSe QDs and NH 2 groups of the anti-VP. The results indicated that PEC immunosensors had a low detection limit of 25 CFU/mL, a wide detection range of 10 2 –10 8 CFU/mL, high stability, low price, and short detection time. This method could be promising for the rapid and ultrasensitive detection of pathogenic microorganisms in the food.
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高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY
·
2018
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IF 3.165
Fanlei Kong,Zhihong Nie,Zhongpo Liu,Shibin Hou,Jiangfeng Ji
The technique of anterior cervical corpectomy and fusion (ACCF) for strut grafting has become a widespread and actively applied for many cervical complaints including cervical degeneration of the intervertebral disks , cervical trauma , cancer, rheumatoid arthritis and multilevel cervical spondylotic diseases. To avoid the complications of the old techniques, the construct stability and long anterior screw-plate designs of the bone strut have been improved by using effective biomaterials. The nanostructured hydroxyapatite (HAp) incorporated with biocompatible polymer matrixes is an effective biomedical material and creating a functional properties applied for different tissue replacements such as dental, hips, knees , tendon and ligaments and tissue repair for maxillofacial reconstruction , stabilization of the jaw bone and spinal fusion . In the present investigation, we have successfully designed cylindrical nano titanium dioxide (n-TiO 2 ) interbody fusion with anterior plate fixation . The n-TiO 2 incorporated HAp/ Polyetheretherketone (PEEK) nanocomposite strut has a superior mechanical properties and larger contact area with high fusion rates as compared with the HAp/PEEK strut in the absence of n-TiO 2 nanoparticles . It is highly able to provide appropriate strength and biological activity similar to the conventional titanium cage and also mainly it has been minimizes subsidence value. The synthesized novel material of n-TiO2 incorporated HAp/PEEK nanocomposite strut is scientifically given effective outcomes for fusion and reconstruction of the ACCF.
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高影响因子
PHYSICA SCRIPTA
·
2023
·Vol. 98
·期 11
·115027
·
IF 2.9
Deyang Ning,Jiaxiong He,Junqi Li,Zuoyu Liu,Renjie Liao,Yuanpei Lan,Fan Wang,Zhou Zou
In this work, three synthesis methods including photo-chemical, precipitation and hydrothermal were applied for synthesizing CeO2/TiO2 catalysts, and the catalytic performance including photodegradation degrees for organic pollutant and ammonia selective catalytic reduction (NH3-SCR) for NO removal were investigated. It was found that the photo-chemical synthesized CeO2-TiO2-PC exhibited the best photodegradation ability for methylene blue (MB), which had the degradation ratio of 91.21% and was approximately 23.92% higher than that with the matrix of rutile TiO2. The formed Ce-Ti heterojunction enhanced the separation of e−/h+ and further promoted the photocatalytic properties. Moreover, the CeO2-TiO2-PC, and the CeO2-TiO2-P which synthesized by the precipitation method showed better NH3-SCR properties than that of hydrothermal synthesized CeO2-TiO2-H below 300 °C, while the CeO2-TiO2-H owned an outstanding NH3-SCR performance above 300 °C. The difference on the NH3-SCR properties may be major attributed to the acid sites, pore structures and surface areas on the surface of different catalysts.
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高影响因子
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