ENERGY & FUELS
·
2022
·
IF 4.654
Xue-Lei Duan,Yuan-Ming Cao,Chong Gao,Sheng-Li Niu,Yi-Wen Shen,Qi Guo,Jiao-Jiao Xie,Kai-Qiang He,Chun-Gang Yuan
One novel/multifunctional selenium-doped SrFeO3-δ/HNTs composite was fabricated and used for immobilization of gaseous mercury. The composite showed excellent performances for Hg0 removal via adsorption coupled with photocatalytic oxidation in visible-light conditions. The adsorption capacity of 4271.15 μg·g–1, rate of 5.0 μg·g–1·min–1, and removal efficiency of ∼100% were obtained under N2+O2, which was further confirmed by reaction kinetics. SrFeO3-δ was selenized into iron diselenide and a Se–Fe bond with high affinity toward Hg0. In addition, the yielding of •O2– and the separation of photoexcited electrons and holes (h+) promoted the photocatalytic oxidation of mercury. The composite with intrinsic magnetism could be easily recycled for reuse by magnetic separation. Moreover, the composite possessed favorable tolerance to the complicated flue gas. An online lab-built thermal decomposition system demonstrated that the immobilized Hg was primarily HgSe, which exhibited very high stability and low toxicity. Density functional theory (DFT) calculations proved that the composite was half metal with magnetism, indicating that Hg on Se-SrFeO3-δ/HNTs formed the stable structure releasing 1.055 eV. The doping of selenium promoted the charge transfer between O (2p) and Hg (6s), which also favored Hg0 removal. Se-SrFeO3-δ/HNTs with recyclability possess great potentials for Hg0 efficient removal and immobilization/detoxification from flue gas.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
Advanced Electronic Materials
·
2018
·Vol. 4
·期 11
·1800237
·
IF 5.466
Xin Wang,Yao Wu,Guanwen Li,Jun Wu,XiaoBing Zhang,Qing Li,Baoping Wang,Jing Chen,Wei Lei
Organometallic perovskites are candidates for low-dose ionizing radiation due to their large mobility-lifetime product, large radiation absorption coefficient, high stability at ambient temperature, and ability to crystallize from solution at low temperatures. However, multiple unstable and expansive organic layers are required to block injected charges from the applied voltage. Here, a radiation photodiode based on p–n junctions formed in the CH 3 NH 3 PbI 3 crystallization process without any other organic layers is reported. Through controlling the location of the dopant, selenium (Se), and its concentration inside CH 3 NH 3 PbI 3 single crystals, the valence band offset of the band alignment is measured as 0 to 0.45 eV. The photodiodes require only two gold electrodes deposited on opposite faces of the CH 3 NH 3 PbI 3 single crystals, and the sensitivity for 60 keV X-ray and 1.25 MeV gamma-ray from Cobalt-60 reached 21 µC mGy air cm −2 and 41 µC Gy air cm −2 , respectively. Experiments measured the ultrafast response time to be 3 µs.
研究领域:
材料科学
·
辐射物理学
✓ 已验证
产品关联
DOI
高影响因子
ENERGY & FUELS
·
2022
·
IF 4.654
Baoshu Li,Jiping Li,Xixue Liu,Jinxue Guo,Yanfang Sun,Xiao Zhang
Exploring highly active catalysts with low-price materials is urgently needed for water-splitting electrolysis. Herein, selenium-doped CoP nanoneedles construct the grass-like structure, and the nanoneedles are vertically anchored on carbon cloth (Se–CoP/CC). Scanning electron microscopy and transmission electron microscopy reveal the nanoneedle array architecture of S–CoP, which is convenient for the adsorption of molecules on active centers. The small diameter of nanoneedles is beneficial for rapid charge transfer. X-ray photoelectron spectroscopy shows the electronic structure regulation of Se incorporation, which is beneficial for the optimized catalysis activity. Electrochemical tests show that Se dopants result in more catalysis sites and faster kinetics. Endowed with these advantages, good catalytic performance of the prepared sample for hydrogen evolution is disclosed, with low overpotentials of 47 mV at 10 mA cm–2 and 145 mV at 100 mA cm–2 in alkaline solution. This work highlights a promising way to improve the performance of transition-metal-based catalysts with non-metal-doping engineering toward water electrolysis application.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
POWDER DIFFRACTION
·
2020
·Vol. 35
·期 4
·276-281
·
IF 0.919
Shengru Wang,Xiaofang Lai,Bingsheng Du,Junhao Ma,Peihua Wang,Jikang Jian
In this work, SnS1−xSex ternary nanobelts were synthesized by a facile hydrothermal method without the assistance of surfactants. The structure, morphology, microstructure, compositions, chemical valences, phonon modes, and optical band gaps of the SnS1−xSex nanobelts were characterized in detail. The results indicate that the SnS1−xSex nanobelts have uniform one-dimensional morphology and are single crystals with high crystallinity. Se is incorporated into the SnS lattice to substitute for S-forming ternary SnS1−xSex alloy. With the increase of Se doping concentration, the optical band gaps of the nanobelts gradually decrease from 1.15 to 1.01 eV, confirming the tunable optical property achieved here.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Peng Zhou,Ziting Li,Yuxin Zhao,Bingxin Zhao,Wenyue Jiang,Xiaoshuang Chen,Jinping Wang,Rui Yang,Chunling Zuo
Electrocatalytic water splitting produces green and pollution-free hydrogen as a clean energy carrier, which can effectively alleviate energy crisis. In this paper, bimetallic and selenium doped cobalt molybdate (Se-CoMoO 4 ) nanosheets with rough surface are resoundingly prepared. The multihole Se-CoMoO 4 nanosheets display ultrathin and rectangular architecture with the dimensions of ∼ 3.5 μm and 700 nm for length and width, respectively. The Se-CoMoO 4 electrocatalyst shows remarkable water electrolysis activity and stability. The overpotentials of oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) are 270 and 63.3 mV at 10 mA cm −2 , along with low Tafel slopes of 51.6 and 62.0 mV dec -1 . Furthermore, the Se-CoMoO 4 couple electrolyzer merely requires a cell voltage of 1.48 V to achieve 10 mA cm −2 current density and presents no apparent attenuation for 30 h. This investigation declares that the hybridization of transition bimetallic oxide with nonmetallic adulteration can afford a tactic for the preparation of bifunctional non-precious metal-based electrocatalysts.
研究领域:
材料科学
·
能源化学
✓ 已验证
DOI
PubMed
高影响因子
MATERIALS LETTERS
·
2019
·
IF 3.019
Yuqiao Wang,Chuanyong Jian,Wenting Hong,Qian Cai,Wei Liu
Cobalt disulfide (CoS 2 ) for hydrogen evolution reaction (HER) suffers from unfavorable hydrogen adsorption properties due to the strong interaction between the adsorbed H and the intensely electropositive cobalt atom. Herein, we successfully demonstrate a general strategy to improve the hydrogen evolution activity of CoS 2 by modulating the surface electron density. The selenium doped CoS 2 (Se-CoS 2 ) nanowires arrays exhibit a durable activity for electrochemical hydrogen evolution in 0.5 M H 2 SO 4 solution to deliver 10 mA cm −2 at the overpotential of only 139 mV. Our density functional theory studies consistently confirm that the surface electron density of CoS 2 has been effectively manipulated by Se doping. The adsorbed hydrogen binding energy to Se-CoS 2 can be optimized to provide an optimal condition for electron and proton transferring to the adsorbed H 2 , thereby promoting HER activity of CoS 2 .
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Energy Storage Materials
·
2023
·
IF 20.4
Jiayi Zhang,Zhengyan Du,Tingyu Yan,Fanda Zeng,Zijin Xu,Jian Xu,Zeshuo Meng,Xiaoying Hu,Jingxiang Zhao,Hongwei Tian
The energy density of supercapacitors can be improved through rapid surface reconstruction of electrode materials in an alkaline medium. Transition metal sulfides (TMSs), including Co 9 S 8 , are widely used as energy storage electrode materials owing to their excellent structural characteristics. However, systematic research dealing with the enhancement of Co 9 S 8 reconstruction ability induced by Se doping has not well been investigated. Herein, an electron orbital modulation strategy was developed to promote the reconfiguration capability of Co 9 S 8 by substitution of the Se element. The theoretical simulation and experimental characterization confirmed the successful introduction of the Se element, resulting in more polarized charge distribution in Co 9 S 8 and better charge transfer ability. The improved adsorption capacity of OH − also enhanced the intensity of surface reactions, as well as effectively increased the refactoring rate. The optimized Co 9 S 5.1 Se 2.9 exhibited a specific capacitance of 1788.1 F g −1 at 1 A g −1 . The assembled flexible asymmetric supercapacitor delivered a maximum energy density of 54.9 Wh kg −1 . Overall, the proposed strategy can effectively be used to construct high energy density electrode materials with optimized reconstruction of dynamic rates through effective modulation of electron orbitals.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale
·
2023
·Vol. 15
·期 39
·16199-16208
·
IF 6.7
Bianli Zhang,Xingyue Qian,Hui Xu,Lin Jiang,Jiawei Xia,Haiqun Chen,Guangyu He
The coordination of the electronic structure and charge transfer through heteroatomic doping and sulfur vacancies is one of the most vital strategies for enhancing the electrocatalytic performance of the oxygen and hydrogen evolution reactions (OER, HER) through water splitting. Se-doped CuCo2S4 nanosheets (CuCo2S3.68Se0.32) with abundant sulfur vacancies were synthesized via a simple hydrothermal method to achieve remarkably efficient electrocatalytic water splitting. Importantly, incorporating Se in three-dimensional nanosheet structures effectively fine-tunes the electronic structure, ensuring ample accessibility of active sites for swift charge carrier transfer and improved reaction kinetics. The optimized CuCo2S3.68Se0.32 offers substantially high electrocatalytic activity with overpotentials of 65 and 230 mV at the current density of 10 mA cm−2 for HER and OER, respectively, which is comparable to commercial catalysts. Combining Se-doping and rich sulfur vacancies facilitates fast charge transport, thus significantly boosting the electrocatalytic activity. Furthermore, utilizing CuCo2S3.68Se0.32 as both the cathode and anode, a two-electrode electrolyser exhibits remarkable performance. It achieves a low voltage of 1.52 V at 10 mA cm−2 and demonstrates exceptional durability over time. This study investigates the significance of doping and vacancies in enhancing electrocatalytic activity for water splitting.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2025
·
IF 4.1
Kun Liu,Long Ma,Pengpeng Du,Qiufang Liu,Yan Yan,Shaohua Wen,Yuan Dang,Qi Xue
Developing non-noble transition metal electrocatalysts with high catalytic activity and durability is essential for the oxygen evolution reaction (OER). Herein, novel nanoflower-like Se-NiCo 2 O 3 electrocatalyst (Se-NiCo 2 O 3 NFs) were fabricated via a hydrothermal refluxing and high-temperature calcination strategy. The electrochemical test results demonstrated that the 7 wt% Se-NiCo 2 O 3 NFs exhibit superior OER activity compared with the pristine NiCo 2 O 3 NFs, requiring an overpotential of 290 mV to reach a current density of 10 mA cm −2 along with a low Tafel slope of 56.89 mV dec −1 . Their superior and stable catalytic performance can be attributed to structure advantage and Se doping. The nanoflower structure provides a large specific surface area to expose abundant active sites. In addition, the doping of Se can further increase the electrical conductivity and regulate the electronic structure of metal atoms, promoting the adsorption of reaction intermediates such as OH ⁎ and enhancing the material's oxygen evolution capability. This work provides new insights and methodologies for designing efficient and stable Se-doped metal oxide electrocatalysts.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Zhiyong Ouyang,Aoqi You,Bai Zheng,Weilu Zheng,Honghua Zhang
Lithium–sulfur (Li–S) batteries have been considered as one of the effective alternative energy systems to commercial lithium-ion batteries (LIBs) due to their high theoretical energy density (2600 Wh kg–1), high theoretical specific capacity (1675 mAh g–1), low cost, and abundant reserves of sulfur. However, intrinsic challenges, such as severe shuttle effect, low conductivity, and significant volume expansion, hinder their large-scale application. In this study, a novel composite (CNT/FP-N, Se), which in situ grown with carbon nanotubes (CNTs) and doped with N, Se elements, has been synthesized by utilizing commercial ferric phosphate (FP) as a precursor. Benefitting from the synergistic effects of abundant adsorption active sites of CNTs and the catalytic effects of N and Se, the shuttle effect of lithium polysulfides (LPS) can be effectively inhibited, leading to an enhancement of Li–S batteries when the CNT/FP-N, Se is utilized as separator modifier. The charge/discharge platforms can be well maintained from 0.1 to 5 C, and a capacity of 617 mAh g–1 at 5 C can be acquired. Notably, an initial capacity of 990.7 mAh g–1 at 1 C can be obtained, with a retention of 711.3 mAh g–1 after 500 cycles, corresponding to a capacity loss rate of only 0.056% per cycle. This work provides a feasible scheme for FP application in next-generation low-cost energy systems.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Kamran Ashraf,Zebo Liu,Qamar uz Zaman,Muhammad Arshad,Waqas Qamar Zaman,Ali Shan,Junxiong Yu,Touseef ur Rehman,Yingping Zhuang,Meijin Guo,Ali Mohsin
Elicitation is a potent strategy to enhance secondary metabolite yield, and nanoparticle-mediated elicitation offers a compelling alternative to traditional methods. Carthamus tinctorius ( C. tinctorius ) is rich in bioactive chlorogenic acids (CGAs) within its suspension cells. However, the mechanism by which doped nanoparticles (NPs) stimulate the CGAs biosynthesis in the cells remains unclear. Therefore, this study first elucidated the synthesis and characterization of selenium (Se)-doped CeO 2 @Fe 3 O 4 NPs and then explored their regulatory effect and mechanism for the CGAs biosynthesis in C. tinctorius cells. Material characterization via TEM, XPS, XRD, and EDX analysis confirmed the successful synthesis of selenium-dopped CeO 2 @Fe 3 O 4 nanocomposite. Fe 3 O 4 , CeO 2 , Fe 3 O 4 @CeO 2 , and selenium-dopped CeO 2 @Fe 3 O 4 NP treatments all promoted the biosynthesis of CGAs in the cells. Notably, the group treated with 15 mg L -1 selenium-dopped CeO 2 @Fe 3 O 4 NPs showed best effect (37.04 mg g −1 , 1.92 times that of control). Finally, metabolome and transcriptome profiling revealed the differential alterations in the content of 45 primary metabolites and differential expression of 83 CGA biosynthesis-related genes. This suggested that selenium-doped CeO 2 @Fe 3 O 4 NPs up-regulated the expression of CGA biosynthesis-related genes, and consequently enhanced CGAs accumulation in the cells. This study provides the first evidence that selenium-doped CeO 2 @Fe 3 O 4 acts as nano-elicitors for the biosynthesis of CGAs.
研究领域:
植物学
·
纳米生物学
·
代谢组学
·
转录组学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Gangyong Li,Siping Li,Zhi Li,Chen Li,Zhaodi Wang,Huan Li,Rui Chen,Miao Zhou,Bao Zhang,Zhaohui Hou
Rechargeable aluminum batteries (RABs) are promising alternatives to lithium-ion batteries in large-scale energy storage applications owing to the abundance of their raw materials and high safety. However, achieving high energy density and long cycling life simultaneously holds great challenges for RABs, especially for high capacity transition metal selenide (TMS)-based positive materials suffering from structural collapse and dissolution in acidic ionic liquid electrolyte. Herein, Se-doped carbon encapsulated Cu 2 Se with yolk-shell structure (YS/Se-C@Cu 2 Se) is rationally constructed to address such issues. Electrochemical and spectroscopic analyses as well as density functional theory calculations show that the highly conductive Se–C shell enhances the electrochemical reaction kinetics of the electrode and provides strong adsorption for the soluble Cu and Se species. Benefiting from these merits, the optimal YS/Se-C@Cu 2 Se cathode manifests a high specific capacity of 1024.2 mAh/g at 0.2 A/g, a superior rate capability of 240.5 mAh/g at 3.2 A/g, and a long-term cycling stability over 2500 cycles. This work offers a feasible approach to the design and construction of low-cost and efficient TMS-based positive materials for realizing practically usable RABs.
研究领域:
材料科学
·
电化学
✓ 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）