RSC Advances
·
2015
·Vol. 5
·期 129
·107150-107157
·
IF 3.84
Hang Zhang,Zipeng Xing,Yan Zhang,Zhenzi Li,Xiaoyan Wu,Chuntao Liu,Qi Zhu,Wei Zhou
A novel Ni2+ and Ti3+ co-doped porous black anatase TiO2 is successfully synthesized by a facile sol–gel technique combined with an in situ solid-state chemical reduction approach, followed by mild calcinations (350 °C) in argon atmosphere. The obtained photocatalysts are characterized in detail by X-ray diffraction, Raman spectroscopy, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, electron paramagnetic resonance, N2 adsorption, and transmission electron microscopy. The results indicate that the Ni2+ and Ti3+ elements are co-doped into the lattice of anatase TiO2. The prepared Ni2+/Ti3+ co-doped black anatase TiO2 possesses a mesoporous structure, consisting of disordered Ti3+ and oxygen vacancy layers. Based on UV-vis diffuse reflectance spectra and valence band analysis, the doped Ni2+ and Ti3+ species can significantly narrow the band gap of anatase TiO2 due to the formation of mid-gap states, which allows utilization of visible-light and prevents fast recombination of photogenerated charges effectively. Furthermore, the prepared co-doped photocatalysts exhibit unprecedented higher photocatalytic activity than that of the pure TiO2 and the Ni2+ doped TiO2. The degradation ratio of methyl orange and rhodamine B is up to 95.38 and 95.86%, respectively, within 150 min irradiation of visible-light by the obtained Ni2+/Ti3+ co-doped porous black anatase TiO2. The high visible-light photocatalytic degradation performance may be ascribed to the efficient doping of Ni2+ and Ti3+ in favor of the absorption of visible-light and the separation of photogenerated charges, and the porous structure facilitating the diffusion of reactants and products.
研究领域:
材料科学
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光催化
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纳米材料
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环境化学
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半导体物理
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DOI
高影响因子
Chinese Optics Letters
·
2025
·Vol. 23
·期 8
·081601
·
IF 2.8
Long Chen,Junhuan Lai,Yong Xu,Yinsheng Xu,Xueyun Liu
The growing demand for broadband near-infrared (NIR) irradiation in security, biomedicine, and food science is driving the development of new NIR light sources. Herein, a series of Cr3+/Ni2+ co-doped transparent glass ceramics containing octahedrally coordinated KCdF3 nanocrystals have been successfully prepared. Under 450 nm blue light excitation, the combination of Cr3+ and Ni2+ results in an ultra-broadband NIR emission band ranging from 700 to 1800 nm. Based on the excitation and emission spectra and the decay lifetime curves, the energy transfer (ET) efficiency from Cr3+ to Ni2+ is confirmed to be 50.2%. A glass ceramic-converted NIR-LED was fabricated by integrating a commercial blue LED chip with a representative Cr3+/Ni2+ co-doped glass ceramic and has demonstrated potential applications in the areas of covert information recognition and night vision illumination. Our investigation provides new insights into the development of ultra-broadband NIR light sources that are both cost-effective and efficient.
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Journal of Materials Chemistry C
·
2024
·Vol. 13
·期 6
·3062-3072
·
IF 5.7
Lucheng Liu,Yuanhong Liu,Tongyu Gao,Guantong Chen,Ronghui Liu,Xiaodong Li
The performance of near-infrared phosphor-converted light-emitting diodes (NIR pc-LEDs) mainly depend on NIR phosphors. The energy transfer (ET) from Cr3+ to Ni2+ is considered an effective method to improve the luminous efficiency of Ni2+-activated phosphors. However, most phosphors usually introduce a low concentration of Cr3+ ions as a sensitizer, resulting in a limited absorption efficiency. Herein, a Cr3+/Ni2+ co-doped Ca3Al2Ge3O12 garnet host was designed, which increased the absorption efficiency by heavily doping with Cr3+, resulting in a high external quantum efficiency (EQE) of 45.7%. The heavily doped Cr3+ ions (15%) acted as a light harvester, selectively transferring the absorbed energy to the Ni2+ ions (1%) instead of quenching between Cr3+, whereby Ni2+ ions effectively extracted the excitation energy to generate NIR-II luminescence. The NIR-II emission intensity of the optimized CAGG:Cr3+, Ni2+ was enhanced by 17.4 times compared with that of CAGG:Ni2+, achieving excellent luminescent thermal stability (73.9%@373 K). Finally, an NIR pc-LED was fabricated by combining the CAGG:Cr3+, Ni2+ phosphor with a 460 nm commercial blue chip, demonstrating its application potential in the identification and analysis of organic compounds. This study not only provides an efficient broadband NIR-II phosphor but also provides a novel idea to improve the luminescence performance of NIR-II phosphors.
研究领域:
材料科学
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光子学
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固态照明
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光学材料
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光谱学
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高影响因子
CERAMICS INTERNATIONAL
·
2024
·Vol. 50
·期 17
·31589-31597
·
IF 5.1
Yi Zhang,Zhexuan Gao,Yinyan Li,Huanping Wang,Shilong Zhao,Yang Shen,Degang Deng,Shiqing Xu
A novel near-infrared emitting Ga 2 O 3 : Ni 2+ phosphor was prepared, and its emission characteristics were improved through melting aid and charge balance. Under 410 nm excitation, the Ga 2 O 3 : Ni 2+ phosphor exhibits broadband near-infrared emission in the second region, with a peak at 1455 nm and a half maximum width of up to 300 nm. At the same time, the crystallinity of the sample was improved and the charge imbalance during substitution between Ga 3+ and Ni 2+ was eliminated through melting assistance and charge compensation. The results show that the emission intensity of Ga 1.97 O 3 : 0.015Ni 2+ , 0.015Ge 4+ phosphor (with added flux H 3 BO 3 ) is 10 times higher than that of Ga 1.985 O 3 : 0.015Ni 2+ sample. Its quantum yield is as high as 31.2 %, significantly higher than the reported Ni 2+ ion doped phosphors. According to the distinct absorptions of C–H, O–H as well as N–H bonds in the shortwave near-infrared range, samples of ethanol, n-hexanol, water and ammonia demonstrated different absorption peaks under the penetration of the constructed phosphor conversion light-emitting diode, which proved the potential application of Ga 2 O 3 : Ni 2+ , Ge 4+ -H 3 BO 3 phosphor in composition analysis and detection.
研究领域:
材料科学
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光学材料
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光子学
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光谱学
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固态化学
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高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Yongjie Wang,Dongshuo Li,Yingju Yan,Li Li,Guotao Xiang,Sha Jiang,Ruiheng Pan,Xiantong Tang,Chuan Jing,Xianju Zhou,Yaroslav Zhydachevskyy,Andrzej Suchocki
Broadband shortwave infrared (SWIR) light-emitting diodes (LEDs) have attracted significant attention due to their widespread applications in spectroscopy, food industry, agriculture, optical communications, night vision, and biomedical technologies. Nevertheless, their performance remains limited by the critical phosphor layer's low quantum efficiency and narrow emission bandwidth. This work presents a series of Ni 2+ -doped spinel phosphors emitting in the SWIR range with high efficiency and tunable broadband emission. Upon UV illumination, normal spinel MgAl 2 O 4 :Ni 2+ phosphors exhibit an emission range of 1100–1600 nm and an internal quantum efficiency (IQE) of 5.2 %. By contrast, the inverse spinel MgGa 2 O 4 :0.02Ni 2+ demonstrates a significantly improved IQE of 77.2 % and excellent thermal stability (62.9 %@423 K), achieved by cation substitution. Furthermore, the significant spectral tuning over a broad range of 405 nm is realized through In 3+ cation- and F − anion-substitution in MgGa 2 O 4 :0.02Ni 2+ . Finally, SWIR pc-LEDs incorporating MgGa 2 O 4 :Ni 2+ phosphors were fabricated, and its potential applications in night vision, high-penetrating imaging, and non-destructive detection were evaluated. This work offers a promising pathway for developing tunable near-infrared light sources, thereby expanding their applicability across a range of advanced technologies.
研究领域:
材料科学
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光学工程
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纳米技术
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高影响因子
RADIATION PHYSICS AND CHEMISTRY
·
2026
·
IF 3.5
Asmae Mimouni,Mohammed F. Alotiby,Hesham Y. Amin,M.S. Sadeq
Understanding the composition–structure–property correlation in glasses is essential for tailoring their optical and radiation shielding performance. In this work, we introduce an investigation of nickel-doped sodium borosilicate glasses with fixed NiO content (2 mol%) by substituting SiO 2 for B 2 O 3 , providing new insight into the role of mixed network formers in tuning optical, nonlinear optical, and gamma-ray shielding properties. The glass samples were synthesized via the conventional melt-quenching method. Optical absorption spectra exhibited characteristic ligand-field transitions of Ni 2+ ions. Also, there is a noticeable blue shift of the absorption edge with increasing SiO 2 content. Consequently, the optical band gap increased from 3.28 to 3.44 eV, reflecting enhanced network polymerization and stronger Si–O bonding. Moreover, the nonlinear optical parameters, including nonlinear refractive index and third-order nonlinear susceptibility, decreased with SiO 2 enrichment, which is attributed to reduced electronic polarizability arising from increased network rigidity. Furthermore, radiation shielding parameters—including mass and linear attenuation coefficients, half-value layer, mean free path, and effective atomic number—showed systematic composition-dependent variation. Notably, improved attenuation efficiency with increasing SiO 2 content is correlated with increased density and modified structural packing of the glass network. Among the investigated compositions, the SiO 2 -rich sample (NaBNiSi-40) exhibited superior shielding efficiency and a lower half-value layer compared to conventional shielding materials. These findings demonstrate that controlled manipulation of mixed glass formers offers an effective strategy for designing multifunctional materials with optimized optical and radiation shielding performance.
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高影响因子
Materials Science and Engineering B-Advanced Functional Solid-State Materials
·
2026
·
IF 5.7
Zhen-Li Zhao,Lin-Dong Wang,Jun Chen,Han Li,Yao Rong,Li-Jia Niu,Jia-Xin Li,Jing Liu,Shokir Khojiev,Zhi-Yi Hu,Yu Li,Bao-Lian Su
3DOM NT-AH was obtained via synergistic reduction integrates Ni0/Ni2+ dual active centers and a NiO/TiO2 p-n heterojunction, enhancing electron transfer and charge separation to achieve a 16-fold increase in H2 evolution over unreduced 3DOM NT. Nickel oxide (NiO), owing to its tunable valence states and non-noble-metal cocatalytic properties, has shown great potential in photocatalytic hydrogen evolution. However, challenges remain in achieving highly dispersed loading, precise valence regulation, and optimized interfacial structures. Herein, we establish the Ni 0 /Ni 2+ dual active centers and NiO/TiO 2 p-n heterojunction in three-dimensionally ordered macroporous NiO x -TiO 2 -AH (3DOM NT-AH) composite photocatalyst for photocatalytic hydrogen production. In this unique structure, Ni 2+ species are favorable for forming a tightly coupled interfacial p-n heterojunction with TiO 2 , thereby promoting interfacial charge separation and directional carrier migration, while metallic Ni 0 acts as an efficient electron sink and electron-transfer mediator, facilitating rapid electron extraction and transport. Meanwhile, the highly dispersed NiO x nanoparticles are intimately anchored on the 3DOM TiO 2 (3DOM T) framework forming p-n heterojunction, further enhancing interfacial electron transfer and suppressing the recombination of photogenerated electron-hole pairs. The synergistic effect of the Ni 0 /Ni 2+ dual active centers and the p-n heterojunction makes that the optimized 3DOM NT-AH sample exhibits excellent photocatalytic hydrogen evolution performance, achieving a hydrogen evolution rate of 3.60 mmol·g −1 ·h −1 , which is about 16 times that of the unreduced 3DOM NiO-TiO 2 (3DOM NT) sample. This work provides a promising strategy for the design of efficient non-noble-metal Ni-based photocatalysts. Download: Download high-res image (201KB) Download: Download full-size image
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高影响因子
Materials
·
2024
·Vol. 17
·期 11
·2706
·
IF 3.1
Yingzhe Du,Lili Li,Yukun Yuan,Yufaning Yin,Genggeng Dai,Yaqing Ren,Shiying Li,Peng Lin
Throughout the nuclear power production process, the disposal of radioactive waste has consistently raised concerns about environmental safety. When the metal tanks used for waste disposal are corroded, radionuclides seep into the groundwater environment and eventually into the biosphere, causing significant damage to the environment. Hence, investigating the adsorption behavior of radionuclides on the corrosion products of metal tanks used for waste disposal is an essential component of safety and evaluation protocols at disposal sites. In order to understand the adsorption behavior of important radionuclides60Co,59Ni,90Sr,135Cs and129I on α-FeOOH, the influences of different pH values, contact time, temperature and ion concentration on the adsorption rate were studied. The adsorption mechanism was also discussed. It was revealed that the adsorption of key nuclides onto α-FeOOH is significantly influenced by both pH and temperature. This change in surface charge corresponds to alterations in the morphology of nuclide ions within the system, subsequently impacting the adsorption efficiency. Sodium ions (Na+) and chlorate ions (ClO3−) compete for coordination with nuclide ions, thereby exerting an additional influence on the adsorption process. The XPS analysis results demonstrate the formation of an internal coordination bond (Ni–O bond) between Ni2+and iron oxide, which is adsorbed onto α-FeOOH.
研究领域:
环境科学
·
核能工程
·
化学
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Haibing Ye,Canhui Zhang,Zitian Zhao,Magdi E.A. Zaki,Boyuan Gao,Arafat Toghan,Minghua Huang
A ternary–atom Ni DA /Fe SA OER catalyst with Ni 2 N 6 and FeN 4 sites is constructed. • Fe auxiliary sites induce spin polarization and tune the d-band center of Ni 2 N 6 sites. • Ni DA /Fe SA –N–HCB shows a low OER overpotential of 230 mV at 10 mA cm −2 . • Aqueous and solid–state Zn–air batteries exhibit long-term cycling stability up to 700 h and 200 h respectively. Air–breathing energy conversion systems, particularly rechargeable zinc–air batteries (RZABs), are among the most promising high–efficiency energy storage technologies, whose long–term charge–discharge performance is critically governed by the sluggish cathodic oxygen evolution reaction (OER). Nitrogen–doped carbon–supported nickel–based dual–atom catalysts (Ni–DACs) have shown considerable potential for catalyzing this multi–proton–electron reaction, yet their activity is constrained by the difficulty of precisely tuning the electronic structure to balance the adsorption/desorption of key intermediates (*OH, *O, and *OOH). Herein, isolated Fe single–atoms are introduced as auxiliary centers to regulate adjacent Ni 2 dual–atom sites anchored on a nitrogen–doped hollow carbon bowl substrate (Ni DA /Fe SA –N–HCB), constructing a ternary–atom OER electrocatalyst with optimized electronic configuration. Multidimensional in situ spectroscopic characterizations combined with density functional theory calculations demonstrate that Fe incorporation induces electronic redistribution and spin polarization at Ni 2 sites, shifts the d–band center, and lowers the energy barrier of the rate–determining step by optimizing intermediate adsorption/desorption energetics. Consequently, Ni DA /Fe SA –N–HCB achieves an overpotential of 230 mV at 10 mA cm −2 . When applied as the air cathode catalyst, both aqueous and solid–state RZABs exhibit outstanding cycling stability of 700 and 200 h, respectively, with minimal charge–voltage decay of 0.01 and 0.02 V . This work provides an effective electronic structure engineering strategy for constructing durable and efficient OER catalysts toward practical zinc–air battery systems. This work presents an auxiliary–site engineering strategy that couples single–atom Fe sites with dual–atom Ni 2 centers to induce electron spin polarization and optimize the d–band center of the Ni₂ sites. Benefiting from this Fe–induced electronic structure modulation, the resulting ternary–atom catalyst delivers outstanding oxygen evolution activity and achieves long–term operational stability in both aqueous and solid–state rechargeable zinc–air batteries with negligible voltage decay. Download: Download high-res image (65KB) Download: Download full-size image
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高影响因子
LANGMUIR
·
2019
·
IF 3.683
Chunya Li,Yayuan Yan,Quanzhou Zhang,Zhenbao Zhang,Langhuan Huang,Jingxian Zhang,Yongqiang Xiong,Shaozao Tan
The applications of graphene-based adsorbents were limited because of their complicated manufacturing technology and hi cost, thus it is very important to prepare new inexpensive and easily manufactured graphene-based adsorbents. Herein, novel GCP hydrogels with different graphene oxide (GO), chitosan (CS), and poly(vinyl alcohol) (PVA) ratios were facilely prepared through a method of freeze–thaw physical cross-linking, which was green and low-cost, and the structural characterization and adsorptive property of the optimum GCP1:2:4 hydrogel toward Cd2+ and Ni2+ in wastewater was evaluated. It was found that the GCP1:2:4 hydrogel had good mechanical strength and a special 3D interconnection porous structure. The isotherms of adsorption used the Langmuir model, and the kinetics of adsorption following the pseudo-second-order model were confirmed. Moreover, the adsorption property with respect to Cd2+ and Ni2+ in wastewater has been largely effected by the pH and was less influenced by the ionic strength and humic acid, and the GCP1:2:4 hydrogel possessed excellent adsorptive and recyclable properties. These results demonstrated that the GCP1:2:4 hydrogel could serve as a desirable adsorbent to get rid of heavy metal ions in sewage.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2018
·Vol. 30
·期 1
·302-307
·
IF 2.324
Xing C. F.,Liu Q. Q.,Wu H. T.
The Li 2 (Mg 0.9 A 0.1 ) 4 TiO 7 (A = Co 2+ , Ni 2+ , Mg 2+ , Zn 2+ , Ca 2+ ) ceramics were prepared by the conventional solid-state reaction method. A series of Li 2 (Mg 0.9 A 0.1 ) 4 TiO 7 ceramics were investigated in regard to the sintering temperatures, crystal structures and dielectric properties. The Li 2 (Mg 0.9 A 0.1 ) 4 TiO 7 ceramic exhibited a single phase of Li 2 Mg 4 TiO 7 , and the Rietveld refinement was used to analyze the crystal structure. The Li 2 (Mg 0.9 Ca 0.1 ) 4 TiO 7 ceramics could be sintered below 1350 °C with high densities, high dielectric constants and near zero τ f values. The maximum Q · f value of Li 2 (Mg 0.9 Zn 0.1 ) 4 TiO 7 was higher than that of Li 2 (Mg 0.9 A 0.1 ) 4 TiO 7 (A = Co 2+ , Ni 2+ , Mg 2+ , Ca 2+ ). The optimum microwave dielectric properties of ε r = 14.77, a high Q · f value of 162,200 GHz and τ f = − 4.30 ppm/°C were achieved in Li 2 (Mg 0.9 Zn 0.1 ) 4 TiO 7 ceramic sintered at 1500 °C. In addition, Li 2 (Mg 0.9 Ca 0.1 ) 4 TiO 7 ceramic sintered at 1300 °C exhibited the suitable dielectric properties with a high ε r value of 15.79, Q · f = 100,300 GHz and a near zero τ f value of − 1.43 ppm/°C.
研究领域:
材料科学
·
无机化学
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产品关联
DOI
高影响因子
Soft Matter
·
2015
·Vol. 12
·期 5
·1411-1418
·
IF 4.029
Haixia Li,Wei Wei,Huiming Xiong
A metallo-supramolecular triblock copolymer polystyrene-b-polyisoprene–[Ni2+]–polystyrene (SI–[Ni2+]–S′) has been efficiently prepared using a one-pot, two-step procedure, where the blocks are held by bis-terpyridine complexes at the junction of SI–S′. This specific metallo-supramolecular chemistry is demonstrated to be a robust approach to potentially broaden the diversity of block copolymers. The location of the metal–ligand complexes has a profound influence on the phase separation of the triblock copolymer in the bulk, which results in a distinctive phase segregation between the end blocks and leads to an unexpected asymmetry of the triblock copolymer. The metal–ligand complexes are found to be preferentially located on the adjacent spherical domain and form a core–shell structure. The resulting multiphase material exhibits distinct elastomeric properties with significant toughness and creep recovery behavior. This type of triblock copolymer is anticipated to be a novel class of hybrid thermo-plastic elastomeric material with wide tunability and functionality.
研究领域:
高分子化学
·
材料科学
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产品关联
DOI
PubMed
高影响因子
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