Advanced Materials Interfaces
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2018
·Vol. 5
·期 22
·1801015
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IF 4.834
Yang-Fan Xu,Xu-Dong Wang,Jin-Feng Liao,Bai-Xue Chen,Hong-Yan Chen,Dai-Bin Kuang
Artificially photocatalytic reduction of CO 2 into valuable chemicals, responding to the call of carbon neutral economy, has aroused considerable interests so far. Among those photocatalysts screened, an emerging and promising alternative of inorganic CsPbBr 3 perovskite has recently been reported. Here, to attain preferable photocatalytic performance, an amorphous-TiO 2 -encapsulated CsPbBr 3 nanocrystal (CsPbBr 3 NC/a-TiO 2 ) hybrid is demonstrated through a solution processing strategy. After optimizing the a-TiO 2 matrix amount by tuning the tetrabutyl titanate precursor volume, the CsPbBr 3 NC/a-TiO 2 composite exhibits a marvelous 6.5-fold improvement on the consumption of photoelectrons in photocatalytic CO 2 reduction reaction when compared with the individual CsPbBr 3 NC. Such significant enhancement is ascribed to the accelerated electron–hole separation and the multiplied CO 2 adsorption. Thus, as an available prototype, this work offers a rational encapsulation design for efficient halide perovskite photocatalyst.
研究领域:
材料科学
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环境科学
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化学
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2019
·
IF 4.175
N’dri Dieudonné Diby,Yueqin Duan,Patrick Atheba Grah,Fengshi Cai,Zhihao Yuan
In the photoelectrochemical (PEC) water splitting for the hydrogen production, the fabrication of a stable and efficient photocatalyst semiconductor remains a challenge. CdS, which is one of most used chalcogenide materials, coupled with metal oxide semiconductor exhibit a generally low durability. TiO 2 nanorods arrays (TNR) sensitized with CdS were synthesized via hydrothermal method and denoted as TNR-CdS. CdS deposition on TNR surface was controlled by regulating the hydrothermal reaction time. The samples were characterized by X-ray diffraction, Raman spectroscopy , scanning electronmicroscopy, X-ray photoelectron spectroscopy, and UV-visible absorption. A high PEC performance as well as a great CdS sensitized TNR photoanodes stability were exhibited. These results could be due to the intimate contact between CdS and TNR, favoring a fast separation of photogenerated charge carriers. The optimal PEC performance was achieved when CdS was deposited on TNR for 10 h. Under AM 1.5G illumination at applied potential of 0 V vs Ag/AgCl, TNR-CdS (10 h) is found to have a photocurrent density of 6.5 mA/cm 2 against 2.25 mA/cm 2 for TNR. Additionally, TNR-CdS (10 h) presented a photoconversion efficiency of 2.5% at −0.4 V vs Ag/AgCl, while that of TNR was 0.9% at-0.35 V vs Ag/AgCl. TNR-CdS showed great stability with and without sacrificial reagent. These results were confirmed by electrochemical impedance spectroscopy measurements, where the rapid transfer/transport and separation of photogenerated charge carriers were highlighted.
研究领域:
材料科学
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能源科学
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DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 19
·15485-15491
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IF 3.289
Yan Zheng,Zhixiang Jiang,Ping Yang
Carambola-like TiO2 consisting of nanosheets with exposed {001} facets was synthesized via a one-step solvothermal method for the first time. The carambola-like TiO2 was characterized by X-ray diffraction, field emission scanning electron microscopy, transmission electron microscopy, and Brunauer–Emmett–Teller nitrogen adsorption isotherm experiments. The formation mechanism of the carambola-like TiO2 is discussed by investigating the effect of reaction time, temperature and the volume of hydrofluoric acid. The results from different growth stages demonstrated that the formation of carambola-like TiO2 included alcoholysis of precursor to nucleation, nuclei growth, dissolution–recrystallization growth and further growth. Reaction temperatures affected the morphologies and surface areas of carambola-like TiO2 samples. The photocatalytic performances of samples prepared at different temperatures were tested. The carambola-like TiO2 sample prepared at 160 °C exhibited the best photocatalytic activity. Such enhanced photocatalytic performance is ascribed to the large surface area and the exposed {001} facets with high activity.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
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2023
·Vol. 47
·期 35
·16611-16620
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IF 3.3
Xin Mai,Ran Gao,Yeheng Zhang,Junnan Chen,Wensong Lin,Chengli Mai
(001)-TiO2/BiOI photocatalysts with microsphere morphology were synthesized by a solvothermal method. The (001)-TiO2/BiOI demonstrated highest photocatalytic performance for the RhB degradation rate of 0.049 min−1 under visible light, which is 5 and 7 times that of (001)-TiO2 and BiOI, respectively. The increased photocatalytic efficiency is due to the construction of heterojunctions, which promote the transportation of photo-generated carriers. The good photochemical stability of the prepared photocatalysts was demonstrated by cycling experiments. The radical quenching experiments show that ˙O2− and ˙OH are the principal active species in the photocatalytic reaction mechanism. Finally, a possible mechanism of p–n heterojunctions in the photocatalytic reaction process was proposed.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
Nanoscale
·
2016
·Vol. 8
·期 21
·10928-10937
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IF 7.76
Hai-Bo Huang,Yue Yang,Li-Hua Chen,Yun Wang,Shao-Zhuan Huang,Jia-Wei Tao,Xiao-Ting Ma,Tawfique Hasan,Yu Li,Yan Xu,Bao-Lian Su
Engineering hierarchical structures of electrode materials is a powerful strategy for optimizing the electrochemical performance of an anode material for lithium-ion batteries (LIBs). Herein, we report the fabrication of hierarchical TiO2/C nanocomposite monoliths by mediated mineralization and carbonization using bacterial cellulose (BC) as a scaffolding template as well as a carbon source. TiO2/C has a robust scaffolding architecture, a mesopore–macropore network and TiO2–C heterostructure. TiO2/C-500, obtained by calcination at 500 °C in nitrogen, contains an anatase TiO2–C heterostructure with a specific surface area of 66.5 m2 g−1. When evaluated as an anode material at 0.5 C, TiO2/C-500 exhibits a high and reversible lithium storage capacity of 188 mA h g−1, an excellent initial capacity of 283 mA h g−1, a long cycle life with a 94% coulombic efficiency preserved after 200 cycles, and a very low charge transfer resistance. The superior electrochemical performance of TiO2/C-500 is attributed to the synergistic effect of high electrical conductivity, anatase TiO2–C heterostructure, mesopore–macropore network and robust scaffolding architecture. The current material strategy affords a general approach for the design of complex inorganic nanocomposites with structural stability, and tunable and interconnected hierarchical porosity that may lead to the next generation of electrochemical supercapacitors with high energy efficiency and superior power density.
研究领域:
材料科学
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电化学
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产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2025
·
IF 8.3
Qiuyu Wang,Xingyu Huo,Jun Wang,Huanyu Chen,Ziwen Wang,Zhe Yin,Binglin Tang,Guoping Yu,Bo Lv
With the escalating energy crisis, clean and renewable hydrogen energy has emerged as a focal point of research. This study utilizes titanium concentrate as the primary raw material and employed a more convenient and efficient mechanical activation-oxidation-reduction-acid leaching process to effectively enrich TiO 2 , thereby producing a highly active and stable TiO 2 photocatalyst substrate. To further enhanced its photocatalytic performance, this research developed a heterostructured mineral-derived material g-C 3 N 4 /TiO 2 -6/Pt. Experimental results indicated that the hydrogen evolution rate of the g-C 3 N 4 /TiO 2 -6/Pt composite material reached 6.42 mmol/g/h within 5 h, whereas that of g-C 3 N 4 /P25/Pt was only 5.92 mmol/g/h. This study underscores the significance of extracting TiO 2 from titanium concentrate and its subsequent applications. By effectively utilizing titanium resources, it aims to address the increasing industrial demand for TiO 2 while providing innovative solutions to combat environmental pollution and mitigate the energy crisis. These findings hold substantial theoretical and practical implications for advancing related fields.
研究领域:
能源科学
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材料科学
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环境科学
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化学工程
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2025
·
IF 6.3
Le Zhang,Ying Liu,Xuan Wang,Daimei Chen,Hao Ding
The superhydrophobic surface like lotus leaf had important application prospects in the field of self-cleaning of building exterior walls. However, its single function and poor UV-aging resistance severely limited its practical application. In this study, sericite, an inorganic UV-shielding material with UV absorption properties, was selected as carrier to prepared sericite-TiO 2 composite particles by hydrothermal method. Then, it was modified with hexadecyltrimethoxysilane (HDTMS) and sprayed onto the substrate’s surfaces, forming a superhydrophobic coating with photocatalytic performance and UV-aging resistance. The results showed that the prepared nano-TiO 2 was rutile and uniformly loaded on the sericite surface. The sericite-TiO 2 /HDTMS coating exhibited lotus-like superhydrophobic property with water contact angle (WCA) and water slide angle (WSA) of 154.7° and 2.1°, respectively. The coating also showed photocatalytic performance, and 35.8% of 10 ppm methyl orange solution can be degraded under UV light in 50 min. Due to the fact that sericite was an inorganic UV-shielding agent, the as-prepared coating showed UV-aging property. After UV irradiation for 40 h, WCA of the surface still approach 150°. The sericite-TiO 2 /HDTMS coating not only had self-cleaning performance and UV-aging property, but also the potential for practical applications.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
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2017
·Vol. 41
·期 15
·7292-7301
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IF 3.269
Yuhua Chen,Ruihan Tong,Na An,Huiming Lin,Fengyu Qu
Currently, incorporating multiple therapeutic functions into one nanostructure has attracted more and more attention for the development of efficient anticancer agents. In this study, a uniform core–shell UCNPs@mSiO2 nanocomposite was prepared as the carrier to develop the NIR light-controlled chemotherapy associated with photodynamic therapy (PDT). In view of the novel UV emission, the semiconductor photosensitizer TiO2 was exploited due to its high efficiency and chemical stability. The host modification method was used to integrate TiO2 doping and mesoporous structure, which can store anticancer drug molecules (doxorubicin, DOX). To improve the utilization of emission, a photolabile o-nitrobenzyl derivative was incorporated to form a sensitive linker (NB linker) as a “gate” to make sure the few leak. Upon NIR irradiation, the UV emission can not only excite TiO2 to produce reactive oxygen species (ROS), but also induce the breaking of NB linker as well as drug release. The NIR-triggered performances were further demonstrated by the cell experiment using HeLa cells as the model cancer cell. The synergistic effect of chemotherapy and PDT induces enhanced cytotoxicity, which is more powerful than their simple effects added together. Therefore, the novel NIR light-controlled double-therapeutic nanocomposite should be a potential candidate for anticancer agents.
研究领域:
生物医学工程
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肿瘤治疗学
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纳米医学
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DOI
高影响因子
MATERIALS RESEARCH BULLETIN
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2024
·
IF 5.3
Mianke Chen,Chenghong Zhang,Ruikai Liu,Kang Qiu,Youlin Gao,Yikang Qiang,Yiqing Yang,Wuyi Chai,Mahmoud A. Khalifa,Jialiang Luo,Wei Ding,Ganhong Zheng,Zhigao Sheng
Multi-layer 2D material assemblies introduce numerous interfaces that would improve microwave absorbing. Here, a 3D porous rGO/Ti 3 C 2 T x /TiO 2 heterostructure was prepared using a one-step hydrothermal synthesis. Due to the presence of the 2D/2D van der Waals heterojunction in rGO/Ti 3 C 2 T x featuring face-to-face contacts, and the 2D/0D heterojunctions in Ti 3 C 2 T x /TiO 2 , the interfacial polarization is optimized. The minimum reflection loss (RL min ) achieves −37.31 dB, and the effective absorption bandwidth (EAB) extends to 6.45 GHz (with<−10 dB). These results not only shed light on understanding and enhancement of interfacial effects, but also provides an appealing mode for the implementation of heterogeneous interfacial engineering using tailored 2D hierarchical structures.
研究领域:
材料科学
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电磁学
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Tao Li,Pengyu Lin,Junjie Song,Yin Du,Xin You,Yunfeng Su,Haifeng Wang,Yongsheng Zhang,Litian Hu
The quality of surface coatings considerably depends on the characteristics of the raw powders. To manufacture TiO 2 ceramic coatings with the desired tribological properties, utilizing high-quality spheroidized raw powders prepared via spray drying is a feasible and high-efficient approach. In this study, by adjusting the solid loading and dispersant content, an agglomeration-dispersion equilibrium is achieved in the optimized granulating slurry. This ensures the stable transportation of the slurry before the atomization process to form droplets, which has a substantial effect on the shape, size, and morphology of the microspheres. Subsequently, based on the thermophysical analyses (a mass loss induced by the removal of water or organic content is noted, and the differential scanning calorimetry results indicate organic degradation), reasonable post-treatment parameters are applied to enhance the strength of the microspheres without causing phase transformation or altering the microstructure. The use of green powders for fabricating TiO 2 and its homologous coatings is a rapid, low-cost, and energy-saving method.
研究领域:
材料科学
·
陶瓷工程
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产品关联
DOI
高影响因子
International Journal of Nanomedicine
·
2017
·
IF 4.3
Shuhui Li,Tianxue Zhu,Jianying Huang,Qingqing Guo,Guoqiang Chen,Yuekun Lai
A facile method was developed to endow cotton fabric with remarkable antibacterial and ultraviolet (UV)-protective properties. The flower-like TiO2 micro-nanoparticles were first deposited onto cotton fabric surface via hydrothermal deposition method. Then, the Ag NPs with a high deposition density were evenly formed onto TiO2@cotton surface by sodium hydroxide solution pretreatment and followed by in situ reduction of ANO3. This work focused on the influence of different hydrothermal reaction durations and the concentration of AgNO3 on antibacterial activity against relevant microorganisms in medicine as well as on the UV-blocking property. Ag NPs-loaded TiO2@cotton exhibited high antibacterial activity with an inhibition rate higher than 99% against Staphylococcus aureus and Escherichia coli bacteria. Moreover, the as-prepared cotton fabric coated with Ag NPs and TiO2 NPs demonstrated outstanding UV protective ability with a high ultraviolet protection factor value of 56.39. Morphological image of the cells revealed a likely loss of viability as a result of the synergistically biocidal effects of TiO2 and Ag on attached bacteria. These results demonstrate a facile and robust synthesis technology for fabricating multifunctional textiles with a promising biocidal activity against common Gram-negative and Gram-positive bacteria.
研究领域:
材料科学
·
生物医学
✓ 已验证
DOI
高影响因子
ChemNanoMat
·
2021
·Vol. 7
·期 11
·1213-1220
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IF 3.154
Yang Liu,Yong Zhao,Yulong Zhao,Peng Jiang
Graphical We report an efficient and robust Cu-decorated Rh/TiO 2 catalyst that improves the styrene selectivity in selective hydrogenation of phenylacetylene. The appropriate Cu coverage is found to modulate the electronic states of surface Rh atoms and changes the Rh exposed active sites, thus mitigating the overhydrogenation and enhancing the selectivity. Phenylacetylene as an impurity in styrene is poisonous to catalysts for styrene polymerization in the production of polystyrene plastics. The selective hydrogenation of phenylacetylene to styrene is an industrially promising route to overcome this challenge yet lacks cost-effective catalysts to prevent the overhydrogenation of styrene to ethylbenzene. In this work, we report an efficient and robust copper-decorated Rh/TiO 2 catalyst for the selective hydrogenation of phenylacetylene to styrene. By optimizing the copper coverage on TiO 2 supported Rh nanoparticles, we achieved a selectivity of 83% towards styrene formation at a phenylacetylene conversion of 93%. The appropriate Cu coverage is found to modulate the electronic states of surface Rh atoms and changes the Rh exposed active sites, weakening the binding strength of alkene and hydrogen intermediates on Rh and thus mitigating the overhydrogenation and enhancing the selectivity for styrene generation. This work offers insights on the rational design of efficient Rh-based bimetallic catalysts for selective hydrogenation of phenylacetylene to styrene.
研究领域:
化学工程
·
催化材料
✓ 已验证
DOI
高影响因子
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