Arabian Journal of Chemistry
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2018
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IF 2.969
Junyan Kuang,Zipeng Xing,Junwei Yin,Zhenzi Li,Siyu Tan,Meng Li,Jiaojiao Jiang,Qi Zhu,Wei Zhou
Ti 3+ self-doped rutile/anatase/TiO 2 (B) mixed-crystal tri-phase heterojunctions photocatalysts are fabricated via hydrothermal approach and mechanochemical process, followed by in-situ solid-state chemical reduction approach. The as-prepared samples are characterized by X-ray diffraction, Raman, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, and UV–vis diffuse reflectance spectroscopy. The photocatalysts are consisted by anatase/rutile TiO 2 nanoparticles and 1D TiO 2 (B) single-crystalline nanorods, which form rutile/anatase/TiO 2 (B) tri-phase heterojunctions. The visible-light-driven photocatalytic degradation rates of methyl orange and phenol are up to ∼98 and 97%, which are 2.2 and 1.8 times higher than that of commercial Degussa P25, 2.3 and 2.2 times higher than that of pure TiO 2 (B) as well. The enhancement can be attributed to the synergistic effect of special nanostructure, tri-phase heterojunctions, oxygen vacancy and Ti 3+ self-doping, which facilitates the absorption of visible light and the spatial separation of photo-generated charge carriers. This work provides a new perspective for designing high-active visible-light-driven photocatalyst in future.
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
Journal of the Taiwan Institute of Chemical Engineers
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2024
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IF 5.5
Ming Du,Xianzhi Yang,Chuye Quan,Huajie Huang,Wei Chen,Jianping Yang,Jian Zhang,Xinbao Zhu,Xing'ao Li
Background Rational design and construction of efficient electrocatalysts are crucial for enhancing the activity and stability of the hydrogen evolution reaction (HER) in alkaline electrolytes. Methods Herein, heteroatom (phosphorus and sulfur)-functionalized and self-adapting Ti 3+ species defect decorated Ti 3-x C 2 T y MXene (PS-TCT) with 3D porous architecture for anchoring platinum-nickel (PtNi) bimetallic nanocrystals for alkaline electrocatalytic HER. Experimental and theoretical studies have shown that the heteroatoms delicately modulated the electronic configuration of MXene to optimize the adsorption capacity of the reaction intermediates. The 3D porous spatial configuration of PS-TCT with abundant Ti 3+ species defect endowed an efficient channel for charge transfer and sufficient catalytically active sites, thus facilitating fast dynamics and long-term stability. Additionally, the strong bimetal-substrate interfacial interaction (Pt-S bonding) between PtNi and PS-TCT established an electron directional transport channel, thus achieving valid and stable interfacial electron transport. Significant findings Consequently, the optimized PtNi@PS-TCT nanohybrids showed remarkable catalytic activity with low overpotentials of 56.1 mV at 10 mA cm −2 and impressive Tafel slope of 81 mV dec −1 for HER in alkaline electrolytes (1.0 M KOH), while exhibiting outstanding electrochemical stability. This work offers a constructive route for precisely constructing high-performance multifunctional composite electrocatalysts.
研究领域:
材料科学
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电化学
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催化科学
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DOI
高影响因子
Nanoscale
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2017
·Vol. 10
·期 5
·2275-2284
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IF 7.367
Ting Song,Piyong Zhang,Tingting Wang,Atif Ali,Heping Zeng
Exploiting solar power for hydrogen production from seawater is a great challenge owing to the corrosive properties of seawater and inadequate visible-light conversion capabilities. Here we report an uncomplicated post-processing method to construct Ti3+ self-doped titanium–silicon material with corrosion resistance. This is a new experimental method to regulate the electrical, optical, and photocatalytic performances of titanium-containing photocatalysts in a controlled way. Moreover, we demonstrate that Ti–O–Si materials with different calcination temperatures can serve as a highly efficient and convenient catalyst for photogeneration of hydrogen from water and simulated seawater. Consequently, the optimized Ti–O–Si (400) sample exhibits impressive enhancement in the photocatalytic hydrogen evolution performance, by nearly 10.0 and 43.1 times compared with TiO2 nanoparticles in water and simulated seawater. The Ti–O–Si (400) with substantial Ti3+ and oxygen vacancies exhibits an excellent photocatalytic H2 production performance due to the improved separation and transmission of the photogenerated electron–hole, the extended visible light response, and corrosion resistance. Our work opens a new door to engineering the intrinsic properties of the titanium-containing materials.
研究领域:
材料科学
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能源科学
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化学工程
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DOI
PubMed
高影响因子
ACS Applied Electronic Materials
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2022
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IF 4.494
Wen-Sheng Zou,Mochi Hong,Wei-Li Kong,Qing-Chun Zhao,Weihua Li,Yaqin Wang
The photocatalytic efficiency of TiO2 greatly suffers from the rapid recombination of photogenerated electron–hole (e–_h+) pairs, small specific surface area, and a large band gap. Self-doping can effectively improve the photocatalytic activity of TiO2. In this work, black Ti3+ self-doped TiO2 mesoporous nanotubes/N-doped carbon/Co nanoparticles (Ti3+-d-TiO2 MNTs/N-d-C/Co NPs) were successfully synthesized through the reduction of TiO2 MNTs by a Co2+–l-histidine (Co-l-his) complex at 800 °C under ordinary pressure and an inert atmosphere. The as-prepared ternary photocatalyst owned a narrower band gap of ∼2.6 eV, relatively high specific surface area of ∼91.0 m2 g–1, and average pore size of ∼12.4 nm. In comparison with the pristine TiO2 MNTs, the ternary photocatalyst exhibited a solar-driven photocatalytic hydrogen evolution rate of ∼3.9 mmol g–1 h–1, which was about ∼4 times than that of the pristine TiO2 MNTs of ∼0.9 mmol g–1 h–1, and enhanced capability of photocatalytic degradation of tetracycline. These improvements could be ascribed to the Ti3+ self-doping, formation of oxygen vacancy, and narrowed band gap of ∼2.6 eV, expanding the optical response to the visible light region, enhancing the separation efficiency of the photogenerated charge carriers. Meanwhile, the N-d-C/Co NPs could not only adsorb tetracycline and water molecules but also activate water molecules and promote H–OH cracking. As a result, enhanced solar-driven hydrogen evolution and tetracycline degradation were achieved.
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
JOURNAL OF HAZARDOUS MATERIALS
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2022
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IF 14.224
Zhendong Yu,Suhang Xun,Meizan Jing,Haofeng Chen,Weiyu Song,Yanhong Chao,Mohammad Rahmani,Yuxiao Ding,Mingqing Hua,Jian Liu,Wenshuai Zhu
To prevent SO x emission and produce low-sulfur diesel oil, we develop a 3D assembly TiO 2 nanoflower catalyst with controllable oxygen vacancies for oxidative desulfurization (ODS) in diesel oil. The roles of oxygen vacancy (OV) and associated Ti 3+ in TiO 2 are fully discussed: the increased OV and Ti 3+ are beneficial for the promoted chemical adsorption of peroxy groups, from − 0.5 eV to − 1.26 eV; also facile to the reduction of the energy barriers of O-O and O-H bonds cleavage, respectively by 1.38 eV and 1.24 eV, thus greatly boosting the generation of hydroxyl radicals·OH and superoxide radicals·O 2 - . Besides, the ODS reaction undergoes two possible pathways, the mechanism and the kinetics are investigated. Above all, the 100% ODS rate can be obtained in only 30 min under optimal conditions, showing a promising perspective of oxygen vacancy engineering for converting hazardous sulfides into high-value chemicals.
研究领域:
材料科学
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催化
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环境化学
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能源工程
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产品关联
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
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2018
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IF 2.21
Meng Li,Zipeng Xing,Jiaojiao Jiang,Zhenzi Li,Junyan Kuang,Junwei Yin,Ning Wan,Qi Zhu,Wei Zhou
In-situ Ti 3+ /S doped high thermostable anatase TiO 2 nanorods using ethanediamine-modified TiOSO 4 as precursor are synthesized under 700 °C calcination , then combined with controllable in-situ solid-phase reaction method, calcined at 350 °C in argon. The outcomes declare that the obtained photocatalyst with a high crystallinity is effectively doped with S element and Ti 3+ species, and synchronously possesses one-dimensional (1D) anatase nanorods structure with length of ∼ 2–5 μm and width of ∼0.5–1 μm. The S and Ti 3+ co-doped 1D nanorod with a narrowed bandgap (2.56 eV) stretches the optical response range to visible-light. The visible-light-driven photocatalytic degradation efficiency of methyl orange and H 2 production rate for Ti 3+ /S-TiO 2 nanorods are as high as 96% and 166 μmol h −1 g −1 , showing about 6 times greater than 600-TR (TiO 2 nanorods). This is be ascribed to the synergistic reaction of S and Ti 3+ species co-doping narrows the bandgap and promotes the separation efficiency of photoexcited carriers, and the one-dimensional structure favors the transportation of photogenerated charge carriers. Hence, the prepared photocatalyst will have a great latent application prospect in fields of energy and environment.
研究领域:
材料科学
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环境科学
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能源科学
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
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IF 5.518
Wenjing Shen,Dandan Xiang,Junnan Yang,Yanting Tang,Changhui Xin,Quanhui Guo,Xin Yu
In this work, beta zeolite supported Ti 3+ -TiO 2 /CdS heterojunction was prepared for photodegradation of tetracycline under visible-light irradiation, and zeolite served as a support for the high dispersions of the Ti 3+ -TiO 2 nanoparticles . The obtained zeolite/Ti 3+ -TiO 2 /CdS heterojunction showed a relatively high surface areas of approximately 63.2 m 2 g −1 , much higher than those of the prepared Ti 3+ -TiO 2 /CdS (27.1 m 2 g −1 ), Ti 3+ -TiO 2 (36.5 m 2 g −1 ), and CdS (31.1 m 2 g −1 ), strongly demonstrating the significant of zeolite for high dispersion of the Ti 3+ -TiO 2 /CdS composite. Besides, the experimental results also showed that the photocatalytic degradation efficiency could reach 78 % in 3 min for the zeolite/Ti 3+ -TiO 2 /CdS heterojunction, and the corresponding rate constant was as high as 0.788 min −1 , which was 26.90 times that of pristine Ti 3+ -TiO 2 , 2.24 times of pristine CdS , and 2.04 times of the Ti 3+ -TiO 2 /CdS composite, mainly because of the supporting effects of zeolite and the formation of Ti 3+ -TiO 2 /CdS heterostructure for highly enhanced charge separation. In addition, the trapping experiment revealed that the main reactive species involved in tetracycline degradation were attributed to the photo-generated holes and ⸱O 2 - species.
研究领域:
环境科学
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材料科学
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化学
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2022
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IF 9.965
Wellars Utetiwabo,Muhammad Khurram Tufail,Chaoyuan Zeng,Lei Zhou,Le Yang,Ze Hua,Jinfeng Zeng,Peiwen Yu,Ruiwen Shao,Wen Yang
The induction of cation dopant into the lattice structure of anode materials is a feasible and effective method to modulate the electronic structure and induce different active sites for Li + storage. However, it is a challenge to create the cation dopant into the structure of the transition metal oxides anode of the lithium-ion batteries (LIBs). In this work, we propose an in-situ source template thermal reduction of graphite foam (GF) and annealing process for the first time to successfully induce Ti 3+ into the titanium niobium oxide (Ti 2 Nb 10 O 29 , TNO) nanocrystal structure denoted as TNO@GF for high-energy/power lithium storage. The induction of Ti 3+ could not only prompt the more active sites for Li + ion storage but also modulate the electronic interaction between the active sites and the intercalated Li + ion, leading to the favorable Li + ions intercalation and minimizing the Li + -ion diffusion barriers in the open channel of the ReO 3- type structure unit. Due to the combined effect of nanocrystal structure and Ti 3+ , TNO@GF yields a higher reversible discharge capacity of 328 mAh g −1 at 0.1C, a higher rate capability of 296.3 mAh g −1 ; and keeps 207.88 mAh g −1 at a high rate of 35 C and shows good cycling stability (217.73 mAh g −1 at the rate of 10 C) with the capacity retention of 83.20 % after 500 cycles. These findings provide insights into cation engineering and its influence on the functional nanomaterials' physicochemical properties, which are not achievable in the perfect crystal for advanced energy storage applications.
研究领域:
材料科学
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电化学
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能源存储
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纳米技术
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2021
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IF 5.316
Xin Lv,Guojian Yang,Caihui Feng,Tingting Lin
The Zr x Ti 1−x O 2 (x = 0.0–0.5) nanofibers were synthesized by an electrospinning process. The influences of zirconium incorporation on the structure, phase composition, lattice parameters , morphology, specific surface area, and surface states were investigated in terms of XRD , SEM, BET, and XPS tests. The humidity sensing performances were also carried out in detail. It can be concluded that the replacement of Zr at Ti-site had significant impacts with regard to the phase structure: the anatase-rutile phase transformation was inhibited by Zr 4+ ion doping; Zr 4+ ion was successfully incorporated into the TiO 2 lattice through a substitutional mode resulting in the formation of solid solution Zr x Ti 1−x O 2 (x = 0.1–0.2) with anatase structure; when the Zr 4+ ion was saturated, excessive Zr 4+ ion formed new phase of Ti 2 ZrO 6 and ZrTiO 4 (nominal x ≥ 0.3); the lattice parameters and the cell volume increased as Zr 4+ ion incorporation. The solid solution Zr 0.2 Ti 0.8 O 2 nanofibers had the highest Ti 3+ abundance among the samples with x ≤ 0.2, accompanied by the highest oxygen vacancies . Moreover, the solid solution Zr 0.2 Ti 0.8 O 2 nanofibers exhibited the best humidity sensing properties: excellent sensitivity as proven by four orders of magnitude change to impedance at 11–95% relative humidity (RH), negligible hysteresis, rapid response and recovery speed as well as superior stability, which were induced by high concentration of oxygen vacancies combined with reactive Ti 3+ ions. A detailed study of the sensing mechanism was also performed in terms of complex impedance spectra.
研究领域:
材料科学
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传感器技术
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产品关联
DOI
高影响因子
CHINESE JOURNAL OF STRUCTURAL CHEMISTRY
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2022
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IF 0.847
Shi-Hao SUN,Qian-Chong ZHANG,Xiao-Liang YE,Chivanje evulu KASHI,Wen-Hua LI,Guan-E WANG,Gang XU
Crystalline polyoxo-titanium clusters (PTCs), as a molecular model of TiO 2 nanomaterials , have attracted unprecedented attention due to their designable structure, tunable band gap, catalysis, and photochromic properties. A new trinuclear Ti 3 -oxo cluster, [Ti 3 (µ 2 -O)(µ 3 -O)(abz) 6 (O i Pr) 2 ] CH 3 CNH 2 O ( Ti3 ), was synthesized by solvothermal method with a yield of 60% by using 4-aminobenzoic acid as ligand. Single-crystal X-ray diffraction shows that it has a [Ti 3 (µ 2 -O)(µ 3 -O)(abz) 6 (O i Pr) 2 ] trinuclear cluster structure. Ti3 crystallizes in monoclinic space group P 2 1 / c with a = 11.091(1), b = 22.837(2), c = 22.754(1) Å, ß = 90.580(6)°, V = 5763.0(6) Å 3 , Z = 4, D c = 1.345 g·cm −3 , F (000) = 2412, µ = 2.743 mm −1 , R = 0.0796, and wR = 0.2260 ( I > 2σ(I)). Ti3 shows typical semiconductive behavior determined by temperature-dependent conductivity test. The chemiresistive humidity sensor fabricated by Ti3 showed good performance, including high response (four orders of magnitude current change from 0 to 100% RH) and fast response time (160 s) and recovery time (26 s).
研究领域:
材料科学
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化学
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产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2026
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IF 5.1
Muhammad Irfan Jahanger,Maaz Ullah Khan,Sumair Ahmed Soomro,Yihan Liang,Chengwen Bin,Man Jiang,Qingguo Feng,Chunfeng Hu
MXenes (Mx) exhibit excellent electromagnetic interference (EMI) shielding properties. However, the inherent restacking tendency and oxidation susceptibility of MXenes pose challenges for their practical application. In this study, Ti3(C1−yNy)2Tx (y = 0.3, 0.5) MXene nanosheets were introduced into multi-walled carbon nanotube:polyaniline (C:P), and Mx/C:P composite films were fabricated via a self-assembly technique. The optimized Mx/C:P20 composite films containing 80 wt% MXene loading exhibited the highest EMI shielding effectiveness (SET), reaching 45.03 dB and 41.93 dB. Due to the synergistic interaction between MXenes and C:P, the absorption contribution increased significantly, thereby enhancing the electromagnetic shielding performance of Mx/C:P composites. These findings highlight the potential of carbonitride MXene-based composites as lightweight and efficient candidates for next-generation EMI shielding applications.
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DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2021
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IF 19.503
Zhi-Wen Wang,Qiang Wan,Ying-Zhang Shi,Huan Wang,Yue-Yue Kang,Shu-Ying Zhu,Sen Lin,Ling Wu
Ultrathin TiO 2 nanosheet (NST) with abundant Ti 3+ sites is developed as a photocatalyst which exhibits a high yield (147.2 μmol g −1 h −1 ) and selectivity (96.8%) for CO 2 to CH 4 . The results of in situ FTIR, in situ EPR and density functional theory (DFT) calculation suggest that CO 2 would be selectively activated on NST surface via forming the bridging Ti···CO 2 − ···Ti coordination species which not only lowers the activation energy barrier, but also determines the selectivity of CH 4 . Additionally, NST with the better separation and transfer ability for photogenerated electrons-holes can fleetly supply the electrons to CO 2 molecules for high efficiently producing CH 4 via the Ti-C coordination bond. Finally, a possible mechanism of the synergistic effect about coordination-activation and photocatalysis is discussed at a molecule level. This work would offer a perspective for designing an effective photocatalyst and tailoring the selectivity of products by coordination activation.
研究领域:
材料科学
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环境科学
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化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）