JOURNAL OF ALLOYS AND COMPOUNDS
·
2016
·
IF 3.014
Wei Xu,Tao Wang,Ye Yu,Sheng Wang
Core-shell composites of TiO 2 nanospheres equipped with MoS 2 nanosheets (TiO 2 @MoS 2 ) were synthesized in the presence of cetyltrimethylammonium bromide through a facile hydrothermal method , which was followed by annealing process in an atmosphere of 2% H 2 balanced by Ar. The TiO 2 @MoS 2 composites exhibited higher electrochemical performance than pure MoS 2 nanosheets, and showed a reversible capacity of 467 mAh g −1 at 100 mA g −1 after 80 cycles with highly stable capacity retention. This good performance may be attributed to the dispersed MoS 2 layer, which accelerates the surface electrochemical reactions and offers a stable structure, and the TiO 2 sphere, which serves as a stabilizer to retain the MoS 2 structure upon prolonged cycling. The core-shell composites can be a promising candidate for use in lithium-ion batteries.
研究领域:
材料科学
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能源存储与转换
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产品关联
DOI
高影响因子
Materials Advances
·
2022
·Vol. 3
·期 4
·2185-2190
·
IF 0
Ping Li,Mengyou Gao,Lei Sun,Huizhong Xu,Xiaochen Dong,Jianjian Lin
Coating a few layers of MoS2 nanosheets on a substrate is an effective approach to enhance catalytic activity for photocatalytic degradation. Herein, we fabricated heterostructured TiO2/MoS2 (H-TiO2/MoS2) with high structural stability via a simple two-step solvothermal approach. H-TiO2/MoS2 was composed of TiO2 as a hard core and MoS2 nanosheets as a shell, which could increase the electron transfer rate between TiO2 and MoS2 and enable active edge sites of MoS2 to be maximally exposed. Besides, H-TiO2/MoS2 indicated enhanced light absorption in the UV to Vis range when compared to TiO2 nanoparticles, and slightly lower than that of MoS2. This is beneficial for the enhancement of the photocatalytic degradation performance. Therefore, H-TiO2/MoS2 displayed a strong adsorption ability toward organic dyes and showed excellent performance in the photocatalytic degradation of rhodamine B with the concentration decreased by 99.4% due to the synergistically stimulative effect. The work will enlighten the development of highly efficient molybdenum sulfide-based heterostructured photocatalysts.
研究领域:
材料科学
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环境科学
·
化学
✓ 已验证
产品关联
DOI
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Zhen Tang,Longhua Xu,Kaiqian Shu,Jie Yang,Haijun Tang
The spread application of Titanium dioxide (TiO 2 ) is severely limited by the rapid recombination of photogenerated electron-hole pairs (e - -h + ). For many applications, two-dimensional (2D) molybdenum disulfide (MoS 2 ), with large specific surface area and sufficient active sites, has been widely researched as a beneficial support for TiO 2 photocatalytic activity enhancement. The synthesized heterostructures , the 2D MoS 2 nanosheets loaded with brown TiO 2 particles (b-TiO 2 @MoS 2 ) were manufactured through an ultrasound aided electrochemical exfoliation of natural bulk molybdenite coupled with sol-gel technique at low temperature (180 ºC). SEM, TEM , HRTEM, XRD , XPS , UV–vis absorption, Raman, PL spectra, and photocurrent analysis were used to investigate the morphology, microstructure, composition , and charge separation property of the samples. It was determined that b-TiO 2 @MoS 2 heterostructures had photocatalytic activity by observing their degradation of butyl xanthate during 120 min of visible light irradiation. Furthermore, the photocatalytic effectiveness of the 1 wt% b-TiO 2 @MoS 2 heterostructures is 94.80%, with a maximum rate constant (k value) of 0.01764 min −1 . In contrast to brown TiO 2 , the findings indicated that the b-TiO 2 @MoS 2 heterostructures enhanced visible light absorption, the expansion of active sites, the separation and transfer of photogenerated charges. A probable degradation mechanism of photodegradation butyl xanthate and charge transfer process of b-TiO 2 @MoS 2 heterostructures under visible light irradiation were also postulated.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2016
·
IF 8.328
Ning Shao,Jinnan Wang,Dadao Wang,Philippe Corvini
We synthesized novel three-dimensional photocatalyst (Ag 3 PO 4 /TiO 2 @MoS 2 ) with various content of TiO 2 @MoS 2 by electrospining, sequential hydrothermal reaction and chemical deposition. The optimal content of TiO 2 @MoS 2 in Ag 3 PO 4 /TiO 2 @MoS 2 composites is 3.5 wt%, and the bandgap of Ag 3 PO 4 /TiO 2 @MoS 2 (3.5 wt%) (1.85 eV) was much lower than that of pure Ag 3 PO 4 (2.45 eV). Due to high conductivity of TiO 2 @MoS 2 heterostructure, the separation efficiency of electron-hole pairs of Ag 3 PO 4 was significantly improved so that Ag 3 PO 4 /TiO 2 @MoS 2 (3.5 wt%) presented higher photocatalytic activity. More than 92% Methyl orange and Methylene blue were photodegraded over Ag 3 PO 4 /TiO 2 @MoS 2 (3.5 wt%) in 12 min and 5 min, respectively. More importantly,TiO 2 @MoS 2 could play the role of ‘wire’ to guide electrons captured by MoS 2 and quickly transferred electrons into solution so that the recombination of electron-hole pairs and the reduction of silver irons were effectively restrained. Thus, Ag 3 PO 4 /TiO 2 @MoS 2 (3.5 wt%) exhibited excellent anti-photocorrosion performance. Even after 10 cycling runs, Ag 3 PO 4 /TiO 2 @MoS 2 (3.5 wt%) could degrade 75% and 92% of oxytetracycline and enrofloxacin, respectively, whereas Ag 3 PO 4 degraded 23% and 44%. In addition, the possible photodegradation pathways of oxytetracycline and enrofloxacin were proposed, demonstrating that the photodegradation mechanisms involving oxidizing/shedding of functional groups firstly and opening the ring sequentially. Further detection of reactive oxidative species indicated that holes were the main active oxidizing species involved in the photocatalytic reaction process. Thus, Ag 3 PO 4 /TiO 2 @MoS 2 (3.5 wt%) is a promising photocatalyst for photodegradation of organic pollutants in the environmental protection.
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
高影响因子
DALTON TRANSACTIONS
·
2018
·Vol. 47
·期 16
·5652-5659
·
IF 4.099
Yong-Jun Yuan,Gaoliang Fang,Daqin Chen,Yanwei Huang,Ling-Xia Yang,Da-Peng Cao,Jingjing Wang,Zhen-Tao Yu,Zhi-Gang Zou
Expanding the photoresponse range of TiO2-based photocatalysts is of great interest for photocatalytic H2 production. Herein, noble-metal-free CuInS2 quantum dots were employed as a novel inorganic dye to expand the visible light absorption of TiO2/MoS2 for solar H2 generation. The as-prepared CuInS2/TiO2/MoS2 photocatalysts exhibit broad absorption from the ultraviolet to near-infrared region. Under visible light irradiation (λ > 420 nm), the CuInS2/TiO2/MoS2 photocatalyst with 0.6 mmol g−1 CuInS2 and 0.5 wt% MoS2 showed the highest H2 evolution rate with a value of 1034 μmol h−1 g−1. Moreover, a considerable H2 evolution rate of 141 μmol h−1 g−1 was obtained under the irradiation of the optimized CuInS2/TiO2/MoS2 photocatalyst with >500 nm light. The reaction mechanism of the CuInS2/TiO2/MoS2 photocatalyst for photocatalytic H2 evolution was investigated in detail by photoluminescence decay study, and the results showed that the photoexcited electrons of CuInS2 can be transferred efficiently through TiO2 to MoS2 and then react with the absorbed protons to generate H2. The reported sensitization strategy tremendously improves the visible light absorption capacity and the photocatalytic performance of TiO2-based photocatalysts.
研究领域:
材料科学
·
光催化
·
能源化学
·
纳米材料
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半导体物理
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太阳能转化
✓ 已验证
DOI
高影响因子
Nanoscale
·
2017
·Vol. 9
·期 46
·18194-18201
·
IF 7.367
Qianyu Wang,Peng Yu,Lu Bai,Ruiying Bao,Ning Wang,Chuanbing Cheng,Zhengying Liu,Mingbo Yang,Wei Yang,Zhanhu Guo
Inspired by the leaf/vein structure of leaves which effectively supports the photosynthesis of green plants, a nano-leaf/vein bionic structure of self-assembled TiO2/MoS2 composites is applied to induce the reversible photochromic reactions of methylene blue (MB) for the first time. This reversible photochromic phenomenon gives a novel performance for the TiO2/MoS2 composites and expands their applications. Similar to the case where the natural vein network in leaves ensures the efficient material transfer and energy exchange for photosynthesis, the bionic internal MoS2 vein network in the composites ensures the efficient separation and directional transfer of photo-generated carriers to restrain the photocatalytic degradation reactions and to enhance the reversible photochromic reactions. Furthermore, the photosensitive applications of the TiO2/MoS2/MB systems with such a self-assembled nano-leaf/vein bionic structure are discussed with two typical photoelectric sensory models for both controllers and detectors.
研究领域:
材料科学
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仿生学
·
光化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2025
·
IF 9.5
Hui Feng,Wensheng Liu,Xinke Hu,Liufang Chen,Aiming Tang,Haiping Wang,Yao Huang
A novel (MoS2/C3N4)-sensitized TiO2 nanotube array (NTA) photoelectrode has been prepared by a simple hydrothermal synthesis and high-temperature calcination. When petal-like MoS2 nanosheets are uniformly distributed on the surface of TiO2 nanotubes coated with layered C3N4, a notable red-shift and high absorption are observed in the visible light region. The photocurrent density (mA cm−2) systematically increases from TiO2 NTAs (0.97), C3N4/TiO2 (1.25), MoS2/TiO2 (1.50), to TiO2/MoS2/C3N4 (1.97) under visible light irradiation, due to the dual S-scheme semiconductor heterostructures comprising multiple components with a staggered band offset. Such a heterostructure exhibits an enhanced photocatalytic performance towards the degradation of organic contaminants, e.g. P-nitrophenol (PNP) and rhodamine B (RhB).
研究领域:
材料科学
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光催化
·
环境功能材料
·
纳米材料
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半导体物理
·
表面科学
✓ 已验证
产品关联
DOI
高影响因子
ChemSusChem
·
2016
·Vol. 9
·期 10
·1118-1124
·
IF 7.116
Xuefeng Liu,Zipeng Xing,Hang Zhang,Wenmei Wang,Yan Zhang,Zhenzi Li,Xiaoyan Wu,Xiujuan Yu,Wei Zhou
Graphical Pass the Mo : A 3 D sandwich of mesoporous black TiO 2 (MBT)/MoS 2 /MBT was fabricated using a facile mechanochemistry method combined with an in situ solid-state chemical reduction approach. The material exhibited excellent visible-light-driven photocatalytic performance for pollutant degradation and hydrogen evolution owing to the sandwich-like heterojunction structure and Ti 3+ doping. A novel 3 D mesoporous black TiO 2 (MBT)/MoS 2 /MBT sandwich-like nanosheet was successfully fabricated using a facile mechanochemical process combined with an in situ solid-state chemical reduction approach, followed by mild calcination (350 °C) under an argon atmosphere. The MBT/MoS 2 /MBT exhibits a 3 D sandwich-like nanosheet structure and heterojunctions are formed at the interfaces between MoS 2 and black TiO 2 . The significantly narrowed band gap of MBT/MoS 2 /MBT is attributed to the introduction of MoS 2 and the formed Ti 3+ species in the frameworks. The visible-light photocatalytic degradation rate of methyl orange and the hydrogen production rate are as high as 89.86 % and 0.56 mmol h −1 g −1 , respectively. The introduction of MoS 2 and Ti 3+ in the frameworks favors the visible-light absorption and the separation of photogenerated charges, and the 3 D sandwich-like heterojunction structure facilitates the transfer of photogenerated charges.
研究领域:
材料科学
·
化学
·
环境科学
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能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Catalysts
·
2025
·Vol. 15
·期 8
·769
·
IF 4
Chen Xie,Tianyi Zhao,Feng Zhou,Bohao Zhao
Photocatalysis offers a cost-effective and eco-friendly approach for environmental remediation, yet traditional powdered photocatalysts suffer from poor recyclability and separation challenges. To address these limitations, we developed a recyclable carbon fiber-supported composite photocatalyst (CC/TiO2NRs@MoS2NPs) featuring a three-dimensional hierarchical core–shell architecture. This structure comprises a TiO2seed layer, vertically aligned TiO2nanorod arrays as the core, and a MoS2nanoparticle shell, fabricated via sequential deposition. Under simulated solar irradiation, the TiO2@MoS2heterojunction exhibited significantly enhanced uranium adsorption capacity, achieving a remarkable 97.3% photocatalytic removal efficiency within 2 h. At an initial uranium concentration of 200 ppm, the material demonstrated an exceptional extraction capacity of 976.7 mg g−1, outperforming most reported photocatalysts. These findings highlight the potential of this 3D core–shell design for efficient uranium recovery and environmental purification applications.
研究领域:
环境修复
·
材料科学
·
核能
·
光催化材料
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Biomaterials Science
·
2019
·Vol. 8
·期 1
·391-404
·
IF 5.251
Guannan Zhang,Xingyu Zhang,Yongqiang Yang,Ruifang Chi,Jing Shi,Ruiqiang Hang,Xiaobo Huang,Xiaohong Yao,Paul K. Chu,Xiangyu Zhang
Prevention of bacterial infection and promotion of osseointegration are two important issues for titanium (Ti) implants in medical research. In addition, after a biofilm is formed on the surface of implants, the immune system and antibiotic therapy may fail. In this work, bio-functionalized titanium dioxide (TiO2)/molybdenum disulfide (MoS2)/polydopamine (PDA)/arginine-glycine-aspartic acid (RGD) nanorod arrays (NAs) are prepared on Ti implants to not only kill bacteria noninvasively upon co-irradiation of 660 nm visible light (VL) and 808 nm near infrared (NIR) light, but also promote the osteogenic activity simultaneously. Dual light irradiation triggers the TiO2/MoS2 NA to generate hyperthermia and reactive oxygen species (ROS) in 10 min. The synergistic effects of the generated hyperthermia and ROS increase the bacterial membrane permeability and bacteria are killed rapidly and efficiently in vitro and in vivo. The biofilm is also eradicated and RGD on the nanorods improves cell adhesion, proliferation, and osteogenic differentiation. The strategy described here for the design of bio-functionalized coatings on Ti implants has great clinical potential in orthopedics, dentistry, and other medical fields.
研究领域:
生物材料
·
纳米技术
·
生物医学工程
·
骨科
·
牙科
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产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2019
·Vol. 9
·期 26
·15033-15041
·
IF 3.049
Ya Gao,Yongjie Zheng,Jixing Chai,Jingzhi Tian,Tao Jing,Deqing Zhang,Junye Cheng,Huiqing Peng,Bin Liu,Guangping Zheng
Effective separation and rapid transfer of photogenerated electron–hole pairs are key features of photocatalytic materials with high catalytic activity, which could be achieved in co-catalysts. It is reported that the two-dimensional (2D) MoS2 is a promising co-catalyst due to its unique semi-conductive properties and graphene-like layered structure. However, the application of MoS2 as a co-catalyst is limited by its poor electrical conductivity. On the other hand, it is worth noting that TiO2 possesses reactive crystal facets, which is one of the dominant mechanisms for the separation of photogenerated electron–hole pairs. In this work, we prepared MoS2/RGO hybrids as co-catalysts which were doped to TiO2 with highly reactive {001} planes via the hydrothermal method. It was found that the {001}-TiO2/MoS2/RGO photocatalysts with 7 wt% MoS2/RGO co-catalyst show the highest photodegradation activity for the degradation of Rh B under visible light irradiation (λ > 400 nm), which could result from the synergy of the effective separation of electron–hole pairs by the {001} facets in TiO2 and the rapid transfer of electron–hole pairs in MoS2/RGO. The results show that the {001}-TiO2/MoS2/RGO hybrid is a low-cost and stable photocatalyst for the effective degradation of Rh B under visible light.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2018
·
IF 8.173
Xiaoqiang Liu,Peipei Liu,Yunfei Tang,Liwei Yang,Lele Li,Zhichong Qi,Deliang Li,Danny K.Y. Wong
In this work, a sensitive photoelectrochemical aptasensor was developed for kanamycin detection using an enhanced photocurrent response strategy, which is based on the surface plasmon resonance effect of gold nanoparticles deposited on a 3D TiO 2 -MoS 2 flower-like heterostructure . A significant aspect of this development lies in the photoelectrochemical and morphological features of the unique ternary composite, which have contributed to the excellent performance of the sensor. To develop an aptasensor, mercapto-group modified aptamers were immobilised on the photoactive composite as a recognition unit for kanamycin. The TiO 2 -MoS 2 -AuNP composite was demonstrated to accelerate the electron transfer , increase the loading of aptamers and improve the visible light excitation of the sensor. Under optimal conditions, the aptasensor exhibited a dynamic range from 0.2 nM to 450 nM of kanamycin with a detection limit of 0.05 nM. Overall, we have successfully synergised both the electrical and the optical merits from individual components to form a ternary composite, which was then demonstrated as an effective scaffold for the development of PEC biosensors.
研究领域:
生物传感技术
·
纳米材料科学
·
环境监测
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）