Royal Society Open Science
·
2018
·Vol. 5
·期 2
·
IF 2.504
Wen-Li Qin,Tian Xia,Ying Ye,Ping-Ping Zhang
In this study, the electromagnetic (EM) performance of talc/NiTiO3 composite was evaluated. The morphology of talc displayed a lamella structure; there were many nanoparticles of NiTiO3 coated on the talc lamella. Thermal destruction occurred, which increased the surface area from 2.51 m2 g−1 to 79.09 m2 g−1 at the calcined stage at 650°C. The presence of NiTiO3 increased dielectric loss and magnetic loss of talc. The calculation of EM wave absorption of talc/NiTiO3 obtained a maximum reflection loss of −11.94 dB at the thickness of 6.85 mm; the optimum thickness for microwave absorption is 6.3–7.3 mm. This study revealed a new approach for fabricating an EM absorber and broadening applications of both talc and NiTiO3 in EM absorption.
研究领域:
材料科学
·
电磁学
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DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Jingjing Chen,Chaoqun Li,Wei Chen,Xiaoyue Zhang,Xuebin Yu,Guanglin Xia
Despite of the moderate working temperature and relatively high hydrogen capacity of NaAlH 4 , the slow H 2 absorption and desorption kinetics and poor reversibility pose a major bottleneck hindering its practical application. Herein, porous NiTiO 3 nanorods is constructed to tailor reversible hydrogen storage performance of NaAlH 4 . It is theoretically and experimentally demonstrated that the building of NiTiO 3 nanorods effectively promotes the uniform distribution of catalytic Ni-based species and Ti-based species inside of NaAlH 4 matrix that are capable of synergistically weakening Al-H bonds of NaAlH 4 . As a result, under the catalysis of porous NiTiO 3 nanorods, the onset temperature for H 2 desorption from NaAlH 4 is decreased down to 89 °C, 91 °C lower than that of pure NaAlH 4 . In addition, NaAlH 4 under the catalysis of porous NiTiO 3 nanorods is capable of releasing 4.5 wt% H 2 within 60 min, 3.8 and 0.9 wt% higher than that of NaAlH 4 catalyzed by NiO and TiO 2 , respectively. More importantly, a reversible capacity of 4.6 wt% could be obtained for NaAlH 4 under the catalysis of porous NiTiO 3 nanorods after 5 cycles, corresponding to a capacity retention of 95%, while this value is significantly decreased to 42% for NaAlH 4 without the addition of NiTiO 3 nanorods. This work provides a new perspective for the development and design of high-performance catalysts for realizing reversible hydrogen storage of NaAlH 4 under moderate condition.
研究领域:
材料科学
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氢储存技术
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催化剂开发
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DOI
高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
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2025
·
IF 4.6
Yuanyuan Wang,Zhanlin Ma,Jian Wang,Jiaqi Ben,Hangmin Guan,Ping Gu,Yingfei Hu
Given the significance of the visible-light-driven reduction of heavy metal chromium (Cr(VI)), it is promising and challenging to investigate photocatalysts that exhibit strong responsiveness to visible light and possess high carrier separation efficiency. In this research, a CaIn 2 S 4 /NiTiO 3 Z-scheme heterojunction has been successfully constructed through the in-situ growth of CaIn 2 S 4 nanosheets on NiTiO 3 nanorods. The energy band alignment between CaIn 2 S 4 and NiTiO 3 in the hierarchical framework facilitated the formation of the heterojunction, which significantly enhanced visible light absorption, promoted the separation of photogenerated carriers, and maintained the high reducing capability of the CaIn 2 S 4 conduction band electrons. These synergies enabled superior Cr(VI) removal efficiency. At an optimized CaIn 2 S 4 to NiTiO 3 ratio of 1:1, about 95 % removal rate of Cr(VI) was achieved within 80 min of visible-light exposure, accompanied by a reaction rate of 0.036 min −1 that is nearly four times faster than that over CaIn 2 S 4 . Furthermore, the charge transfer driving force and reaction mechanisms were comprehensively investigated by optoelectronic measurements, emphasizing the crucial roles of electrons (e − ) in Cr(VI) reduction. This investigation showcases the potential of the CaIn 2 S 4 /NiTiO 3 Z-scheme heterojunction for photocatalytic applications in Cr(VI)-containing wastewater treatment.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yuchen Han,Yue Han,Yuye Yan,Yingxia Zong,Ruiyang Zhao,Jishu Han,Lei Wang
Hydrogen is a secondary fuel with various characteristics that include high safety, environmental protection, high energy and cleanliness. In recent years, the use of solar energy to produce hydrogen has received extensive attention. In this paper, NiTiO 3 nanoparticles were used to modify CuCo 2 S 4 to construct hollow NiTiO 3 /CuCo 2 S 4 double-shell photocatalyst. Under the light irradiation, the optimal hydrogen evolution rate of the synthesized NiTiO 3 /CuCo 2 S 4 photocatalyst was 6.24 mmol g −1 h −1 . The experimental results indicated that the NiTiO 3 /CuCo 2 S 4 composite, featuring a hollow double-shell structure, significantly augmented the capacity for visible light absorption and further suppressed the recombination of photogenerated electrons and holes. Additionally, the formation of a Z-scheme heterojunction within the photocatalyst effectively enhanced the redox capability. The research introduced a promising Z-scheme heterojunction photocatalyst, offered innovative insights into the field of photocatalytic hydrogen evolution, thereby contributing to the conversion of solar energy into chemical fuels.
研究领域:
材料科学
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能源化学
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光催化
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产品关联
DOI
高影响因子
Catalysis Science & Technology
·
2020
·Vol. 10
·期 9
·2931-2947
·
IF 5.721
Yanbing Li,Guorong Wang,Yanbin Wang,Zhiliang Jin
Two photo-active materials with opposite surface potentials, NiTiO3 with a negative potential and CoAl LDH with a positive potential, have been rationally integrated into two-dimensional (2D) active plane phosphated-CoAl LDH with rich active sites and three-dimensional (3D) hollow NiTiO3 rods with more negative zeta potential. The delicate architecture can efficiently accelerate the separation and migration of photo-excited electrons, make the surface potential more negative, enhance thermodynamic H2 evolution reaction, and offer rich active planes for photo-catalytic redox reactions. Based on these highlighted photo-catalytic benefits, the optimal composite exhibits more prominent photo-catalytic hydrogen evolution performance compared with NiTiO3 or CoAl LDH materials alone under visible irradiation. In detail, the stereoscopic catalyst, constructed by phosphating CoAl LDH layers anchored on NiTiO3 hollow rods, exhibits a hydrogen evolution activity of about 594 μmol 5 h−1, which is 11.6 times and 14.8 times that of CoAl LDH (51 μmol 5 h−1) and NiTiO3 (40 μmol 5 h−1) alone, respectively. Also, the density functional theory results reveal the good conductivity, which is beneficial for charge migration in the hybrid sample. The results from the thoroughly conducted characterization studies such as TEM, SEM, XPS, XRD, UV-vis DRS, transient photocurrent, and FTIR spectroscopy have been well researched and they are in good agreement with each other.
研究领域:
材料科学
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能源化学
·
表面科学
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DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2024
·
IF 3.2
Congtian Liu,Xiaoya Zhu,Ling Wang,Chujun Feng,Jian Rong,Zhongyu Li,Song Xu
Tetracycline antibiotics as one of the most widely used antibiotics at present, are difficult to degrade in the environment, which poses a serious threat to the ecosystem and human health. In this work, NiTiO 3 /g-C 3 N 4 composites were successfully constructed by calcination method using nickel acetate tetrahydrate as nickel source and tetrabutyl titanate as titanium source. The photocatalytic degradation efficiency of the 5 wt% NiTiO 3 /g-C 3 N 4 composite of TC can reach 88.2 % within 150 min, which was 1.4 and 2.2 times higher than that of pure g-C 3 N 4 (63 %) and NiTiO 3 (40 %), respectively. The 5 wt% NiTiO 3 /g-C 3 N 4 composite can still maintain good stability after four cycles. The experimental results showed that the construction of Z-scheme heterojunction can effectively improve the photocatalytic activity of the catalysts and maintain good redox properties at the same time. Furthermore, a possible mechanism of photocatalytic degradation of NiTiO 3 /g-C 3 N 4 heterojunction has been suggested.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
Surfaces and Interfaces
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2025
·
IF 6.3
Ziyi Jiang,Guoyu Wei,Changhong Guo,Huiming Lin
The growing issue of environmental pollution, particularly water contamination by the spread of bacteria and organic dyes, eagerly demands to be resolved. Given its advantages of being efficient, convenient, and eco-friendly, photocatalysis stands out as a promising strategy for water purification. To harness solar energy effectively, Co 3 S 4 nanodots with a narrow band gap were integrated onto the surface of NiTiO 3 nanoflowers to construct heterostructure (NC-x). Detailed characterization revealed that the charge transfer mechanism belonged to a novel Z-scheme, which not only facilitated efficient electron-hole separation into different components but also maintained a high redox potential, leading to the generation of plenty of reactive oxygen species (ROS: . O 2 - and . OH). These ROS were instrumental in damaging bacteria and the degradation of organic dyes. Furthermore, the NC-x nanocomposite exhibited excellent photothermal property and the local hyperthermia further enhanced the photocatalytic reaction. Optimized for composition, NC-2 shows the effective inactivation to E. coli, achieving a lethality rate of 99.50±0.22 % under simulated sunlight irradiation. It has also been successfully applied to treat complex lake water samples, demonstrating significant antibacterial (99.82±1.28 %) and methylene blue (90.60±1.78 %) degradation efficiency, simultaneously. With the novel biocompatibility and decontamination capabilities, NC-2 holds substantial potential for water purification applications.
研究领域:
环境科学
·
材料科学
·
光催化技术
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产品关联
DOI
高影响因子
Small
·
2024
·
IF 13
Shuhan Fan,Qu Yang,Guilin Yin,Xiaosi Qi,Yuyu Feng,Junfei Ding,Qiong Peng,Yunpeng Qu,Qinglong Wang,Yan Shen,Mingkui Wang,Xiu Gong
Developing efficient and stable halide perovskite-based photocatalysts for highly selectivity reduction CO 2 to valuable fuels remains a significant challenge due to their intrinsic instability. Herein, a novel heterostructure featuring 2D Cs 3 Sb 2 I 9 nanosheets on a 3D flower-like mesoporous NiTiO 3 framework using a top-down stepwise membrane fabrication technique is constructed. The unique bilayer heterostructure formed on the 3D mesoporous framework endowed NiTiO 3 /Cs 3 Sb 2 I 9 with sufficient and close interface contact, minimizing charge transport distance, and effectively promoting the charge transfer at the interface, thus improving the reaction efficiency of the catalyst surface. As revealed by characterization and calculation, the coupling of Cs 3 Sb 2 I 9 with NiTiO 3 facilitates the hydrogenation process during catalytic, directing reaction intermediates toward highly selective CH 4 production. Furthermore, the van der Waals forces inherent in the 3D/2D heterostructure with face-to-face contact provide superior stability, ensuring the efficient realization of photocatalytic CO 2 reduction to CH 4 . Consequently, the optimized 3D/2D NiTiO 3 /Cs 3 Sb 2 I 9 heterostructure demonstrates an impressive CH 4 yield of 43.4 µmol g −1 h −1 with a selectivity of up to 88.6%, surpassing most reported perovskite-based photocatalysts to date. This investigation contributes to overcoming the challenges of commercializing perovskite-based photocatalysts and paves the way for the development of sustainable and efficient CO 2 conversion technologies.
研究领域:
材料科学
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环境科学
·
化学工程
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2025
·
IF 2.5
Khoa Vu Dang,Bac Luong Huu
A novel NiTiO 3 /TiO 2 heterostructure was synthesized via a green sol–gel method using lemon juice as a natural precursor. The phase formation, structural, morphological, and optical properties of the synthesized composite were investigated using x-ray diffraction (XRD), Raman scattering, field-emission scanning electron microscopy (FESEM), and diffuse reflectance spectroscopy. XRD and Raman scattering results confirm the coexistence of both ilmenite NiTiO 3 and TiO 2 phases in the composite. The TiO 2 phase in the composite undergoes temperature-dependent phase transformation: it exists as anatase when calcined at 600°C, a mixture of anatase and rutile at 700°C, and pure rutile at 800°C. FESEM reveals that the synthesized NiTiO 3 particles exhibit spherical nanostructures. The NiTiO 3 /TiO 2 composites were investigated for their sonocatalytic activity in the degradation of rhodamine B under ultrasonic irradiation. The composite exhibited significantly enhanced sonocatalytic performance compared to pure NiTiO 3 , which can be attributed to the improved interfacial charge transfer and the synergistic effects between NiTiO 3 and TiO 2 . These results highlight the potential of green-processed composites in advanced oxidation processes for wastewater treatment. Graphic abstract
研究领域:
材料科学
·
环境工程
·
纳米技术
·
催化
·
绿色化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Yue-Ying Li,Jian-Gan Wang,Huan-Huan Sun,Bingqing Wei
Organic dyes used in the conventional dye-sensitized solar cells (DSSCs) suffer from poor light stability and high cost. In this work, we demonstrate a new inorganic sensitized solar cell based on ordered one-dimensional semiconductor nanorod arrays of TiO2/NiTiO3 (NTO) heterostructures prepared via a facile two-step hydrothermal approach. The semiconductor heterostructure arrays are highly desirable and promising for DSSCs because of their direct charge transport capability and slow charge recombination rate. The low-cost NTO inorganic semiconductor possesses an appropriate band gap that matches well with TiO2, which behaves like a “dye” to enable efficient light harvesting and fast electron–hole separation. The solar cells constructed by the ordered TiO2/NTO heterostructure photoanodes show a significantly improved power conversion efficiency, high fill factor, and more promising, outstanding life stability. The present work will open up an avenue to design heterostructured inorganics for high-performance solar cells.
研究领域:
材料科学
·
太阳能
·
纳米技术
·
光伏技术
✓ 已验证
DOI
高影响因子
Energy Storage Materials
·
2017
·
IF 0
Zhen-Dong Huang,Ting-Ting Zhang,Hao Lu,Titus Masese,Kentarou Yamamoto,Rui-Qing Liu,Xiu-Jing Lin,Xiao-Miao Feng,Xian-Ming Liu,Dan Wang,Yoshiharu Uchimoto,Yan-Wen Ma
Titanium based compounds, such as TiO 2 , Li 5 Ti 4 O 12 and Na 2 Ti n O 2n+1 (where n = 3–8), have been pursued intensively for high energy and high power sodium and lithium ion batteries (NIBs and LIBs). Beside high rate and long life, the relatively higher capacity, higher tap density, scalable preparation process and low production cost are also essential factors for promising anode materials to progress from laboratory scale to pilot scale and finally to commercially scale up. Therefore, a dual-metal-organic crystal derived NiTiO 3 mesoporous micro-prism is developed by a scalable and unique self-assembly process. The interesting assembling mechanism is also clearly discussed based on the colour and microstructure evolutions of the reaction solution at different stage. The obtained NiTiO 3 hexagonal micro-prism features interconnected grain-boundary-rich and mesoporous structure, endowing highly conductive path for charge transportation and shortcut for ion diffusion. Together with a high tap density (2.5 g cm −3 ), this anode materials can deliver a high capacity of 373 and 562 mAh g −1 with superior rate and capacity retention for both sodium and lithium ion storage, respectively. It is also noteworthy that even after cycling for 1000 cycles at 5000 mA g −1 , the capacity retention ratio is maintained at 44.3% and 60.4% for sodium and lithium ion storage, respectively. The superior electrochemical properties , coupled with the low cost, dense structure and the scalable preparation method, will bring NiTiO 3 micro-prism to the fore as a promising contender anode material for long durability and high power compact NIBs and LIBs.
研究领域:
材料科学
·
电化学
·
纳米材料
·
能源存储
·
无机非金属材料
·
电池技术
·
功能材料
✓ 已验证
DOI
Catalysts
·
2019
·Vol. 9
·期 6
·561
·
IF 3.444
Bozhi Yang,Xuefeng Bai,Jiaxuan Wang,Minghao Fang,Xiaowen Wu,Yan’gai Liu,Zhaohui Huang,Cheng-Yen Lao,Xin Min
Photocatalytic degradation of pollutants is one of the cleanest technologies for environmental remediation. Herein, we prepared NiO/NiTiO3heterostructure nanofiber (200 nm) films by electrospinning and high temperature heat treatment, using nickel acetate and tetrabutyltitanate as nickel and titanium sources, respectively. The NiO/NiTiO3heterostructure has advantages of good photodegradation rate constant and stability. By controlling the temperature, we can optimize the phase composition of these nanofibers for better photocatalytic performance. Based on our findings of the Rhodamine B degradation results, the best performance was obtained with 10% NiO and 90% NiTiO3; 92.9% of the Rhodamine B (5 mg/L) was degraded after reaction under full spectrum irradiation for 60 min. More importantly, the repeating test showed that these nanofiber films can remain active and stable after multiple cycles. The mechanisms of the photocatalysis reactions were also discussed. This demonstration provides a guideline in designing a new photocatalyst that we hope will serve the environmental needs for this and the coming century.Keywords:NiO/NiTiO3;nanofiber;electrospinning;photocatalyst
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DOI
高影响因子
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