JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Xiaokang Wan,Xiaoqian Luo,Dashun Lu,Gezhong Liu,Yanming Fu,Li Cai,Chao Hu,Haitao Wang
A facile and reliable two-step electrodeposition method was successfully developed to construct and regulate copper incorporated BiVO 4 (Cu:BiVO 4 ) nanostructures with controllable surface morphologies and compositions for efficient photoelectrochemical water splitting. Cu:BiVO 4 nanofibers and nanonets were obtained after annealing the Cu nanoparticles electrodeposited BiOI nanosheets (Cu:BiOI) with the controlled radial immersion of vanadium precursor solution. The morphology and composition of Cu:BiVO 4 nanostructures can be effectively regulated by adjusting the concentration of Cu nanoparticles, which served as the heteroatom precursor and contributed to steric hindrance. A suitable doping concentration of Cu in Cu:BiVO 4 resulted in enhanced electronic conductivity and created nanostructures with large surface area and abundant catalytic active sites for improved charge transfer dynamics. As a result, photoelectrochemical properties of Cu:BiVO 4 -150s photoanode with nanofibers and nanoparticles were improved significantly, realizing a 2.6-fold photocurrent density of 1.7 mA cm −2 at 1.23 V vs. RHE compared to bare BiVO 4 under AM 1.5 G simulated solar irradiation. However, Cu:BiVO 4 nanonets with more interlaced nanostructure showed a decreased photocurrent density, which could be attributed to the introduction of more recombination centers. This simple yet general approach of morphology and composition control offers a beneficial guidance to develop doped semiconductors with controlled nanostructures for excellent water splitting performance.
研究领域:
材料科学
·
电化学
·
纳米技术
·
能量转换
·
半导体掺杂
✓ 已验证
DOI
高影响因子
BULLETIN OF THE KOREAN CHEMICAL SOCIETY
·
2018
·Vol. 39
·期 5
·657-664
·
IF 0.522
Nai-Di Tan,Jian-Hang Yin,Yaqing Yuan,Lei Meng,Na Xu
Herein, a novel bright-green and highly fluorescent polyethyleneimine capped copper nanoclusters (CuNCs@PEI) has been hydrothermally synthesized, which is employed as a fluorescence probe to determine rifampicin. Under optimum synthetic conditions, the morphology, surface chemistry and optical features of resulting CuNCs@PEI are well characterized by transmission electron microscopy, Fourier transform infrared spectroscopy, UV–Vis absorption spectra, transient and steady-state fluorescence. In comparison to previous reports, the new species with a larger diameter of approximately 3 nm exhibit higher fluorescence quantum yield (QY) up to nearly 10.7%, and demonstrate tolerability to extreme pH, high ionic strengths as well as long-term UV irradiation. These excellent optical properties ascribe to unique grain size and surface chemical features of products, which are further discussed in this work. In addition, we employed as-prepared CuNCs@PEI to detect rifampicin based on fluorescence quenching phenomenon. The fluorescence intensity of probe is linearly proportional to rifampicin over the concentration rage from 0 to 20 μM, where the limit of detection (LOD) is 50 nM. Besides, this probe can be also used to assay rifampicin in serum samples with satisfactory recoveries.
研究领域:
分析化学
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纳米生物技术
·
药物分析
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分子诊断
·
转化医学
·
药代动力学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2015
·
IF 2.999
Chuanying Wang,Xianhua Cheng
β-NaYF 4 :Yb 3+ /Er 3+ microcrystals codoped with Cr 3+ ions were prepared for the first time via a facile hydrothermal method . The influence of doping concentration of Cr 3+ ions on growth and upconversion (UC) luminescence properties of β-NaYF 4 :Yb 3+ /Er 3+ microcrystals were investigated in detail. Scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectra and photoluminescence (PL) spectra were used for characterization. The results demonstrated that the morphology and size of β-NaYF 4 :Yb 3+ /Er 3+ microcrystals were influenced by doping concentration of Cr 3+ ions, the possible mechanism was proposed. The UC intensity of β-NaYF 4 :Yb 3+ /Er 3+ microcrystals was significantly enhanced by doping of Cr 3+ ions. In contrast to β-NaYF 4 :Yb 3+ /Er 3+ microcrystals without doping of Cr 3+ ions, the green and red emission intensities of the microcrystals codoped with 15 mol% Cr 3+ ions were enhanced by 16 and 7 times, respectively. The enhancement of the UC intensities should be ascribed to the distortion of local symmetry around Er 3+ ions, the UC mechanism was discussed. This work will be helpful for improving the UC intensity of other lanthanide-doped UC nano- and micro-crystals.
研究领域:
材料科学
·
无机化学
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光功能材料
·
纳米医学
·
生物成像
·
分子影像学
·
光学材料
✓ 已验证
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2015
·
IF 2.288
Zhiyong Mao,Jingjing Chen,Liang Sun,Qifei Lu,Dajian Wang
(Ba,Sr) 3 MgSi 2 O 8 :Eu 2+ , Mn 2+ phosphors with 430/505/660 nm tri-bands or 430/660 nm dual-bands emission were demonstrated in this work by controlling the appearence or not of green emitting intermediate phases, (Ba,Sr) 2 SiO 4 :Eu 2+ . Through varying the stoichiometric amount of SiO 2 in precursor, the coexistence of green emitting intermediate phase tended to be sensitive and diversified. Laser Microzone Raman spectrum was employed to look insight into the lattice stretch and the preferential occupation sites of Ba 2+ ions in Sr 3 MgSi 2 O 8 lattices. The local structure and the crystal field of Eu 2+ luminescent centers were found to be disturbed by distorted arrangement of cross-linked [MgO 6 ] octahedra and [SiO 4 ] tetrahedra. This mechanism approach provided some new insights to further understanding the adjustment strategy of green emitting intermediate phases in (Ba,Sr) 3 MgSi 2 O 8 :Eu 2+ , Mn 2+ phosphor potentially applied as red/blue dual-bands emitting or red/green/blue tri-bands emitting materials.
研究领域:
材料科学
·
无机化学
·
发光材料
·
固体物理
·
光电子学
✓ 已验证
DOI
高影响因子
Advanced Science
·
2019
·Vol. 6
·期 17
·1901096
·
IF 15.804
Shaofei Wen,Yunpeng Wang,Bijiao Lan,Weida Zhang,Zhuo Shi,Shichao Lv,Yujun Zhao,Jianrong Qiu,Shifeng Zhou
Transparent nanoceramics embedded with highly dense crystalline domains are promising for applications in missile guidance, infrared night vision, and laser and nuclear radiation detection. Unfortunately, current nanoceramics are strictly constrained by the stringent construction procedures such as super-high pressure and containerless processing. Here, a pressureless crystallization engineering strategy in glass for elaboration of transparent nanoceramics and fibers is proposed and experimentally demonstrated. By intentional creation of a sharp contrast between nucleation and growth rates, the crystal growth rate during glass crystallization can be significantly suppressed. Importantly, this unique phase-transition habit enables the achievement of transparent nanoceramics and even smooth fibers with extremely tiny crystalline size (≈20 nm) and high crystallinity (≈97%) under atmospheric pressure. This allows the generation of an attractive nonlinear optical response such as dynamic optical filtering and luminescence in the mid-infrared waveband of 4300–4950 nm. These findings highlight that the strategy to switch the phase-transition habit of glass into the unconventional crystallization regime may provide new opportunities for the creation of next-generation nanoceramics and fibers.
研究领域:
材料科学
·
无机非金属材料
·
光学功能材料
·
纳米陶瓷
·
玻璃物理
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS CHEMISTRY
·
2011
·Vol. 21
·期 20
·7296-7301
·
IF 5.101
Jungang Hou,Rui Cao,Zheng Wang,Shuqiang Jiao,Hongmin Zhu
Single-crystalline chromium doped bismuth titanate (Bi4Ti3−xCrxO12, x = 0.0–0.5) nanosheets with exposed {110} facets have been synthesized via a facile hydrothermal process. The Bi4Ti3−xCrxO12nanosheets possess well-defined tetragonal shapes with landscape dimension of 100–300 nm and thickness of 10–30 nm. The in-plane surfaces of the nanosheets lies on {001}, and the side surfaces are (110) and (10). Extension of the light absorption from the ultraviolet region to the visible-light region arises from the Cr 2p levels confirmed by XPS spectra. The Bi4Ti2.6Cr0.4O12 nanosheets with high stability showed the highest photocatalytic performance of H2 evolution from water under visible-light irradiation. Furthermore, the heterostructures by using the NiOx nanoparticles tightly coupled on the surface of Bi4Ti2.6Cr0.4O12 nanosheets, exhibited an enhanced photocatalytic activity due to the decrease in the recombination rate of the photoinduced electrons and holes, demonstrating that NiOx/Bi4Ti2.6Cr0.4O12 nanosheet is a promising candidate as a visible light photocatalyst.
研究领域:
材料科学
·
光催化
·
纳米材料
·
能源化学
·
半导体物理
·
表面科学
·
无机化学
✓ 已验证
DOI
高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2023
·Vol. 415
·期 22
·5551-5562
·
IF 4.3
Li Jun,Liu Shanghua,Dong Hui,Li Yueyuan,Liu Qing,Wang Shujun,Wang Ping,Li Yang,Li Yueyun,Wei Qin
An efficient photo-to-electrical signal is pivotal to photoelectrochemical (PEC) biosensors. In our work, a novel PEC biosensor was fabricated for the detection of neuron-specific enolase (NSE) based on a ZnIn 2 S 4 /Ag 2 CO 3 Z-scheme heterostructure. Due to the overlapping band potentials of the ZnIn 2 S 4 and Ag 2 CO 3 , the formed Z-scheme heterostructure can promote the charge separation and photoelectric conversion efficiency. And the concomitant Ag nanoparticles in Ag 2 CO 3 provided multiple functions to enhance the PEC response of the Z-scheme heterostructure. It acts not only as a bridge for the transfer of carriers between ZnIn 2 S 4 and Ag 2 CO 3 , promoting the constructed Z-scheme heterostructure, but also as electron mediators to accelerate the transfer of photogenerated carriers and improve the capture of visible light of the Z-scheme heterostructure by surface plasmon resonance (SPR). Compared with single Ag 2 CO 3 and ZnIn 2 S 4 , the photocurrent of the designed Z-scheme heterostructure increased more than 20 and 60 times respectively. The fabricated PEC biosensor based on a ZnIn 2 S 4 /Ag 2 CO 3 Z-scheme heterostructure exhibits sensitive detection to NSE, and presents a linear range of 50 fg·mL −1 ~ 200 ng·mL −1 with a limit of detection of 4.86 fg·mL −1 . The proposed PEC biosensor provides a potential approach for clinical diagnosis.
研究领域:
分析化学
·
生物传感器
·
光化学
·
纳米技术
·
生物医学工程
✓ 已验证
DOI
高影响因子
RARE METALS
·
2023
·Vol. 42
·期 12
·3993-4004
·
IF 8.8
Ma Yan,Fang Hui-Xue,Chen Rong,Chen Qian,Liu Sheng-Jun,Zhang Kui,Li Hai-Jin
Metal organic framework (MOF) shows great potential in the research field of photocatalysis, and it is a big challenge to achieve efficient photocatalytic activity. In this work, we have successfully grown two-dimensional MOF (2D-MOF) nanosheets on 2D-MOF nanosheets for the first time using a homometallic nodal strategy, and successfully prepared ultrathin nanosheets with tightly bound 2D/2D heterojunctions. 2D Ni-BDC nanosheets were used as carriers to grow 2D Ni-TCPP nanosheets on top of them. Ni-TCPP has a high light absorption capacity, thus extending the light absorption range of 2D/2D heterojunctions. The tight coupling of the heterojunction effectively shortens the electron transfer distance, promotes the separation of interfacial charges, and improves the photocatalytic activity. Particularly, Ni-BDC/Ni-TCPP-3 can achieve to a hydrogen production rate of 428.0 μmol·g −1 , approximately 5.75 times higher than Ni-BDC and 5.24 times higher than Ni-TCPP, respectively. Thus, 2D-MOF/2D-MOF heterojunctions provide a promising strategy for enhancing photocatalytic performance through rational heterostructure design with homometallic node strategy. Graphical abstract
研究领域:
材料科学
·
纳米技术
·
催化
·
能量转换
✓ 已验证
DOI
高影响因子
FirePhysChem
·
2022
·
IF 0
Kunkai Wang,Xiangzhi Li,Kaidi Yang,Huan Huo,Qi Xue,Bozhou Wang,Fuqiang Bi
1,1,4,4-Tetramethyl-2-tetrazene (TMTZ), a potential candidate for replacing 1,1-dimethylhydrazine (UDMH), has excellent properties including a high specific impulse, non-toxicity and non-volatility. However, most synthetic methods depicted in the literature use stoichiometric oxidative coupling, and the oxidizing agents are usually heavy metals or halogens, leading to low synthetic efficiency and high environmental pollution. In order to overcome these problems, it is necessary to explore more environmentally friendly and catalytic synthetic methods. In this paper, a method of photocatalytic oxidative coupling for the preparation of TMTZ was reported for the first time. By using an organic photocatalyst Eosin Y, TMTZ was synthesized rapidly and efficiently. The thermal decomposition properties of TMTZ were studied, and different performance characteristics between TMTZ and UDMH were determined and analyzed, which provided a basis for the application of TMTZ based new liquid propellant.
研究领域:
有机化学
·
催化化学
·
能源材料
·
推进剂化学
✓ 已验证
DOI
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2019
·Vol. 44
·期 31
·16348-16358
·
IF 4.084
Dandan Sun,Dechao Chi,Zekang Yang,Zipeng Xing,Junwei Yin,Zhenzi Li,Qi Zhu,Wei Zhou
Mesoporous g-C 3 N 4 /Zn–Ti layered double hydroxide (LDH)-laminated van der Waals heterojunction nanosheets were prepared by a facile one-step in situ hydrothermal method . Due to the strong electrostatic interactions between the positively charged Zn–Ti LDH and negatively charged g-C 3 N 4 nanocrystal , a laminated van der Waals heterostructure was successfully formed between Zn–Ti LDH and g-C 3 N 4 . The mesoporous g-C 3 N 4 /Zn–Ti LDH-laminated van der Waals heterojunction, which had a narrow bandgap of 2.41 eV extended the photoresponse to the visible light region. The obtained heterojunctions showed excellent visible-light-driven photocatalytic performance for the complete removal of ceftriaxone sodium (up to ∼97%) and a high hydrogen production rate (∼161.87 μmol h −1 g −1 ). This was mainly attributed to the formation of the laminated van der Waals heterojunctions, which favoured charge separation and the absorption of visible light, and the mesoporous structure, which provided more surface active sites. This facile strategy for preparing mesoporous g-C 3 N 4 /Zn–Ti LDH-laminated van der Waals heterojunctions offers new insights for the fabrication of high-performance van der Waals heterojunction photocatalytic materials.
研究领域:
材料科学
·
光催化
·
纳米材料
·
环境化学
·
能源化学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS CHEMISTRY
·
2011
·Vol. 21
·期 18
·6736-6741
·
IF 5.101
Xiwei Zhang,Jiansheng Jie,Zhi Wang,Chunyan Wu,Li Wang,Qiang Peng,Yongqiang Yu,Peng Jiang,Chao Xie
Single-crystal p-type ZnSe nanowires (NWs) with zinc blende structure and [21–1] growth direction were synthesized by using bismuth (Bi) as dopant via a thermal co-evaporation method. The ZnSe : Bi NWs showed evident p-type conductivity with hole concentration up to 4.1 × 1018 cm−3 after the acceptor activation. Negative photoconductivity was first investigated in the p-ZnSe NWs, i.e., the conductivity of the NWs under light was dramatically lower than that in the dark. Surface effects arising from oxygen absorption and photo-desorption were suggested to be responsible for this. By using Al as the Schottky gate, high-performance nano-metal-semiconductor field-effect transistors (nanoMESFETs) were constructed, and measurements on the Al/p-ZnSe NW Schottky diode also revealed the bias-dependent photoresponse. It is expected that the p-type ZnSe : Bi NWs will have great potential in nano-optoelectronic applications.
研究领域:
材料科学
·
半导体物理
·
纳米技术
·
光电子学
·
凝聚态物理
✓ 已验证
DOI
高影响因子
DYES AND PIGMENTS
·
2016
·
IF 4.055
Xiong Liu,Dong Wang,Hong Gao,Zhou Yang,Yan Xing,Hui Cao,Wanli He,Huihui Wang,Jianming Gu,Huiying Hu
The novel kind of charge-transfer porphyrin complexes with symmetrical and asymmetrical side groups were synthesized by the high-yielding [2 + 2] click chemistry reaction involved a two-step procedure. Both electrochemical and UV–vis studies were characterized and proved that the side groups of the porphyrin complexes played an important role on optical properties and energy gaps. The novel series did show the narrower band gap and broader absorption in the visible and near infrared region. As the side groups, the click moieties also affected the third-order nonlinear optical responses, and all the compounds exhibited the expected nonlinear optical properties which were affected by the chemical structures . The optical-limiting performance had also been studied, which was in agreement with the result of Z-scan experiments.
研究领域:
材料化学
·
物理化学
·
光功能材料
·
有机合成
·
分子光谱学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）