JOURNAL OF ALLOYS AND COMPOUNDS
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2026
·
IF 6.7
Quanbo Huang,Anqi Yu,Zhiguo Ye,Xinyuan Peng,Xing Chen,Yongjun Zhang,Zhaobo Li,Jialong Chen,Xinyu Liu,Peiyun Ao,Juntong Huang,Duosheng Li,Qiyuan Gu,Qi Sun,Fei Zhu,Song Chen,Xuetao Yuan
A durable low-Ir anode catalyst is required for efficient acidic oxygen evolution reaction (OER) in proton-exchange membrane water electrolysis. Here, a Ti-supported entropy-stabilized rutile (IrTaSnReMn)Oₓ high-entropy solid solution was fabricated by a thermal decomposition route. The near-equimolar multication design stabilizes a rutile-type oxide framework, modulates Ir local coordination, and creates Ir-M bridge environments. In 0.5 M H₂SO₄, the optimized (IrTaSnReMn)Oₓ electrode requires an overpotential of 160 mV to reach 10 mA cm⁻² and exhibits a Tafel slope of 25.53 mV dec⁻¹ . It also maintains stable operation at 200 mA cm⁻² for 500 h, while post-stability inductively coupled plasma mass spectrometry (ICP-MS) detects only trace Ir dissolution. Electrochemical active surface area (ECSA) normalized activity, Ir mass activity, and turnover frequency ( TOF ) analyses further indicate enhanced intrinsic activity and improved Ir utilization compared with IrO₂ and lower-component control oxides. Structural and spectroscopic analyses show homogeneous incorporation of Ir, Ta, Sn, Re, and Mn into a rutile-type multicomponent oxide and reveal modified Ir-O-M coordination. The density functional theory (DFT) calculations comparing different bridge configurations identify the Ir-Mn bridge as the most favorable site for balancing oxygen-intermediate adsorption and lowering the potential-determining step. This work provides a structure-guided strategy for designing low-Ir multicomponent rutile oxides for durable acidic water oxidation.
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高影响因子
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
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2026
·Vol. 41
·期 4
·990-999
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IF 1.4
Chen Yanlin,Yang Yuhang,Wei Feng,Lu Guangjian,Xiang Xing
Phosphoric acid was utilized to modify titanium dioxide, elucidating its mechanism for inhibiting the high-temperature transformation of the anatase phase into the rutile phase. The effects of sintering temperature, phosphoric acid doping amount, and initial grain size on the stability of anatase phase were evaluated. The results reveal that phosphate groups chelate to the TiO 2 surface effectively suppressed phase transition. This research provides a new insight into the mechanism by which phosphoric acid-modified TiO 2 inhibits the anatase-to-rutile phase transformation, offering theoretical support for its application in high temperature environments.
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高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Mengyao Guo,Sikai Yao,Wenjie Zhang,Qichang Wang,Richen Lin,Daolun Liang,Dekui Shen
The separation and transfer efficiency of photogenerated electron-hole pairs in TiO 2 nanorod is crucial for its photoelectrochemical (PEC) water-splitting performance. A band-matched TiO 2 homojunction photoanode was synthesized through a two-step hydrothermal method, where the anatase TiO 2 shell was controllably grown over Co-doping rutile TiO 2 nanorod arrays. Oxygen vacancies of the rutile TiO 2 nanorods were prominently generated with the doping of Cobalt, regarding the positive shift of the energy bands. The conduction/valence band offsets between rutile and anatase TiO 2 were increased to 0.43 and 0.25 eV, increasing the driving force for the separation of photogenerated electron-hole pairs, effectively suppressing the recombination of carriers. The cobalt doped TiO 2 homojunction photoanode with the anatase shell thickness of 42 nm demonstrated an outstanding PEC performance, with a photocurrent density of 1.45 mA cm −2 at 1.23 V vs. RHE and a hydrogen production rate of 26.17 μmol cm −2 h −1 . The results provided an effective strategy for the development of TiO 2 homojunction with high PEC water splitting performance.
研究领域:
材料科学
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能源科学
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高影响因子
RSC Advances
·
2025
·Vol. 15
·期 13
·10144-10149
·
IF 4.6
Lang Yang,Jialei Ying,Zhenzhong Liu,Guangyu He,Linli Xu,Mingyue Liu,Xinlei Xu,Guihua Chen,Meili Guan
Although TiO2 has been widely applied in many fields, the design and preparation of one-dimensional rutile TiO2 nanomaterials for high-efficiency photocatalysis under visible light remain challenging. Herein, uniform Co-doped rutile TiO2 nanorods with selective adsorption and photocatalytic activity for methylene blue (MB) have been developed via a one-pot molten salt flux method. Compared to pure rutile TiO2 nanorods, the Co-doped rutile TiO2 nanorods exhibited an obvious core/shell structure with smaller inner crystal face spacing (d001 = 0.20 nm) and a larger rough surface (the BET specific surface area is 25 m2 g−1). Furthermore, different dyes were employed to investigate the adsorption ability of Co-doped rutile TiO2 nanorods. The density functional theory (DFT) calculations determined that both the electrostatic potential and molecular structure could influence the adsorption behavior on the photocatalyst surface. The results indicated that the Co-doped TiO2 nanorods possessed a high selective adsorption capacity for MB (134.54 mg g−1 in neutral solution). The degradation of MB using Co-doped rutile TiO2 nanorods was conducted under visible light irradiation, yielding with an apparent rate constant of 0.301 min−1 at pH = 7. The degradation mechanism was further explored through electron spin resonance (ESR) experiments, which identified the formation of superoxide anions (·O2−) and hydroxyl radicals (·OH) in the system. This study provides a new strategy for preparing novel rutile TiO2 photocatalysts for the degradation of organic dyes under visible light.
研究领域:
材料科学
·
环境科学
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PubMed
高影响因子
MATERIALS LETTERS
·
2021
·
IF 3.423
Hong Wang,Zhongying Liu,Yihai Zhou,Renchun Yang
In this paper, P O was grafted on the surface of rutile TiO 2 by one-step hydrothermal method . Due to the presence of the highly electronegative oxygen element, the surface of TiO 2 often presented an electron-deficient state, which limited its application in reduction reactions. Herein, the low electronegativity element P from the phosphate was grafted on the surface of TiO 2 to form a P O structure, which changes the electronic equilibrium state of the TiO 2 and provide a new channel for electron migration. The surface of TiO 2 presented an electron-enrich structure, which promoted the best hydrogen production performance around 28 mmol·g −1 ·h −1 on TiO 2 -P-0.01.
研究领域:
材料科学
·
纳米技术
·
光催化
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高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
·
2017
·Vol. 44
·期 1
·705-720
·
IF 1.369
Hu Wenyuan,Dong Faqin,Zhang Jing,Liu Mingxue,He Huichao,Yang Dingming,Deng Hongquan
A flaky photocatalytic composite of anatase@natural rutile(A@NR) was obtained using one-step microwave hydrothermal synthesis, which was designed to overcome the low photocatalytic efficiency stemming from high electron-hole recombination and a narrow photoresponse range. The characterizations were completely elucidated using X-ray diffraction, field emission scanning electron microscopy, Brunauer Emmett Teller surface area, ultraviolet–visible diffuse reflectance spectroscopy, and photoluminescence spectra. The efficiency of A@NR in photocatalytic degradation of methyl orange was determined to be close to that of P25 under UV light and superior to that of P25 under visible light. The excellent photocatalytic activity results from the synergistic effects of substituting Fe ions, which alter the band structure, and the isomerism of anatase and natural rutile, which separates the photogenerated electron holes. The calculated apparent quantum efficiencies of 32.8 and 12.9% for A@NR, under UV and visible light irradiation, respectively, show a higher catalytic activity and a more effective photoinduced electron-hole separation in A@NR than in P25.
研究领域:
材料科学
·
光催化化学
·
环境功能材料
·
纳米材料
·
半导体光催化
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高影响因子
ACS Applied Nano Materials
·
2023
·
IF 5.9
Bozhi Wu,Kuibo Yin,Yuheng Huang,Yongqiang Yang,Zhangping Wen,Jiahong Kang,Yuwei Xiong,Qian Zhang,Meng Nie,Litao Sun
Nowadays, piezoelectric nanogenerators (PENGs) based on poly(vinylidene fluoride) (PVDF) have exhibited extensive potential applications in wearable electronics. Improving the piezoelectric performance of PVDF-based PENGs through low-cost and nontoxic fillers is an attractive technology for industrial applications. Herein, we propose a superior piezoelectric performance of PVDF-based PENG with cheap and nontoxic TiO2 nanorods as the regulated fillers. The built-in electric field of the constructed heterostructures in mixed-phase (anatase–rutile) TiO2 nanorods enriches the formation of electroactive β-phase (87.6%) in PVDF. Moreover, the piezoelectric output of the TiO2@PVDF-based PENG (TP-PENG) reaches 42.5 V, which is 15.7 times higher than the pure PVDF-based PENG with the same electrospinning process. The TP-PENG exhibits superior durability within 9000 cycles, being capable of charging the capacitors, powering the diode light-emitting diode (LED) lights, and monitoring real-time human movements. This promotes the great potential of the PENG for a variety of applications, including biomechanical energy harvesting, motion sensing, and powering microelectronic devices. Most importantly, this study demonstrates that the strategy of controlling phase transition and switching between crystal structures is of great relevance to extending the kinds of possible regulating fillers to enhance the performance of PVDF-based PENGs. It provides a promising low-cost and nontoxic approach for the development of high-performance PENGs.
研究领域:
材料科学
·
能源技术
·
纳米技术
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高影响因子
Catalysis Science & Technology
·
2021
·Vol. 11
·期 12
·4181-4195
·
IF 6.119
Fan Fu,Yufan Zhang,Yan Zhang,Yuyue Chen
In this experiment, Mn@TiO2 nanofibers in the form of membranes were fabricated by ordinary electrospinning and a higher temperature calcination process. Field-emission scanning, X-ray diffraction analysis, X-ray photoelectron spectroscopy, Raman spectra, UV-visible diffuse spectra, UV-visible spectroscopy, and Brunauer–Emmett–Teller (BET) evaluation were used to characterize the resulting samples. The study revealed that, upon the addition of the manganese ion, the continuous and mechanical properties of the nanofibers and nanofilms were substantially enhanced. Notably, after 60 minutes, the Mn@TiO2-0.10 degradation efficiency reached 94.92% under ultraviolet light, which was 5 times greater than that for TiO2 nanofibers. It was due to the controlled mixture phase and palpable raised specific surface area, which ensured a pronounced enhanced photocatalytic activity of the nanofibers. In addition, the application of nanofibers on the capacitor aspect was explored by electrochemical workstations. The highest photoactivity sample performed mass-specific capacity as high as 5.09 F g−1. Such efficient capacity and higher photoactivity of the photocatalyst shed light on the preparation of soft inorganic materials and their application in energy conversion.
研究领域:
材料科学
·
环境科学
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高影响因子
ChemNanoMat
·
2018
·Vol. 4
·期 11
·1133-1139
·
IF 3.173
Yiwei Hu,Tao Ding,Kailong Zhang,Biao Li,Baichuan Zhu,Kaibin Tang
Graphical At the interface : Component tunable rutile-anatase TiO 2 /RGO nanostructure shows excellent oxygen evolution reaction performance which is superior to reported TiO 2 -based materials, resulting from the enhancement of adsorption due to the electron transfer mechanism between rutile and anatase, as well as TiO 2 and RGO. As an earth-abundant and environment-friendly material, the potential of TiO 2 in many field, including oxygen evolution reaction (OER), has not yet been fully developed. Here, we fabricate component tunable rutile-anatase TiO 2 /reduced graphene oxide (RGO) nanocomposites with high OER activity which exhibit a current density of 10 mA cm −2 at an overpotential of 283 mV. The performance is superior to the previous reported TiO 2 (600 mV) and comparable with the leading results of other active materials. The catalytic mechanism is suggested according to our experimental results that the interactions between rutile and anatase, as well as RGO and TiO 2 result in the enhancement of adsorption of hydroxyl. Such an adsorption is advantageous to provide a surface reaction environment and reduce the activation energy of the electrochemical process, resulting in the best OER performance. This work should stimulate the design of more materials for the improvement of OER activity.
研究领域:
材料科学
·
电化学
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高影响因子
CONSTRUCTION AND BUILDING MATERIALS
·
2016
·
IF 2.421
Peng Fei,Hanguo Xiong,Jie Cai,Chao Liu,Zia-ud-Din,Yan Yu
This paper analyzes the impact of rutile nano-titanium dioxide (nano-TiO 2 ) on the weatherability of bamboo fiber/high-density polyethylene (HDPE) composites using xenon-arc weathering accelerated tests. The results showed that a series of performance reduction containing color fading, surface cracking, structural transformations and loss of mechanical properties appeared on the composites during the accelerated weathering process. These attributes could be minimized to a greater extent using rutile nano-TiO 2 . The analysis revealed that, although free-radicals created by nano-TiO 2 after absorbed UV light may resulted in the oxidization of bamboo fiber and HDPE , rutile nano-TiO 2 mainly acted as light screening agent and ultraviolet absorbent, which retarded the photo-oxidative of the composites. Moreover, rutile nano-TiO 2 enhanced the thermal stability by interacting with the molecular chain of bamboo fiber and HDPE which resulted into reduced thermo-oxidative aging of composites.
研究领域:
材料科学
·
环境科学
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高影响因子
CERAMICS INTERNATIONAL
·
2017
·
IF 2.986
Li Fang,Leixin Hou,Yuhao Zhang,Yongkang Wang,Guanghong Yan
Highly hydrophobic rutile titania-silica nanocomposites were synthesized by an improved hydrolysis co-precipitation method using low-cost sodium metasilicate and titanium oxysulfate (TiOSO 4 ) as precursors, followed sequentially by calcination at 800 °C and modification with trimethylchlorosilane (TMCS). It was found that the resulting TiO 2 -SiO 2 nanocomposites had a Ti/Si molar ratio of 5:1 and exhibited single-phase rutile with a specific surface area of 269 m 2 g −1 . The addition of acetylacetone (AcAc) during the hydrolysis co-precipitation process played a key role in the growth of well-ordered TiO 2 -SiO 2 crystallites since the hydrolysis rate of TiOSO 4 might be retarded due to the complexation of AcAc to the Ti atoms in TiOSO 4 . The TMCS-modified TiO 2 -SiO 2 nanocomposites exhibited a high root-mean-square (RMS) roughness of 22 nm and good hydrophobicity with a static contact angle of 143.7°, highlighting its potential application as a filler in exterior wall coatings.
研究领域:
材料科学
·
化学工程
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高影响因子
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
·
2017
·Vol. 85
·期 2
·394-401
·
IF 1.575
Qian Xin,Han Huanre,Chen Yulong,Yuan Ye
Abstract In this study, an attempt is done to synthesize anatase/brookite/rutile TiO 2 nanocomposites via a simple solvothermal method with hydrochloric acid, dehydrated ethanol, and titanium butoxide in a sol−gel environment. The effect of preparation temperature on the content of each phase, crystallite size, morphology, and photocatalytic activity was systemically studied. The structures of the products prepared under different temperatures were characterized using X-ray diffraction analysis, transmission electron microscopy, Raman spectra, and BET surface area. The optical properties were measured by UV–vis diffuse reflectance spectra. Besides, the photocatalytic activities were evaluated by performing the degradation of rhodamine B azo dye under UV−vis radiation. The results reveal that the content of different phases and crystallite size can be tailored via tuning the solvothermal condition. In addition, the obtained TiO 2 nanocomposites are a kind of mesoporous materials and have large BET surface area, narrow pore size distribution, and low band gap, which exhibit excellent photocatalytic performance (of activity about 4.40 times that of Degussa TiO 2 P25). Through examining the photocatalytic stability, the obtained TiO 2 nanocomposites exhibit a very stable photocatalytic performance. Therefore, the current method to TiO 2 preparation could provide a simple and reliable route for developing photocatalytic materials with high photocatalytic activity. Graphical abstract
研究领域:
材料科学
·
环境科学
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高影响因子
危险品化学品经营许可证（带存储）