Solar RRL
·
2023
·Vol. 7
·期 14
·2300259
·
IF 7.9
Lianqing Yu,Xiang Li,Lijie Duan,Yaping Zhang,Haifeng Zhu
Owing to great efficient routes for charge carrier separation and transfer, heterostructure photocatalysts play significant roles in many photocatalytic reactions. Based on the bionic structure, an interesting composite photocatalyst of cadmium sulfide dewdrops on ultrathin strontium titanate branches with oxygen vacancies is successfully constructed by a simple chemical bath deposition method. The oxygen vacancies act as electron traps in the dendritic perovskite SrTiO 3 nanostructure. Meanwhile, the CdS can provide abundant active sites for the hydrogen evolution reaction. The results demonstrate that SrTiO 3 /CdS-5% nanocomposite with oxygen vacancies achieves the highest hydrogen production rate of 4537.9 μmol g −1 h −1 under visible light, which is over 50 times more than that of the single SrTiO 3 with oxygen vacancies (79.36 μmol g −1 h −1 ), pure CdS (81.79 μmol g −1 h −1 ), and more than 750 times that of pure SrTiO 3 (6.132 μmol g −1 h −1 ). Density generalized function theory calculations show that the bandgap values of SrTiO 3 /CdS nanocomposite with oxygen vacancies are narrower than that of the original SrTiO 3 and CdS, in which the electrons flow from CdS to SrTiO 3 , and form an internal electric field at the interface, prolonging the carrier lifetime. Importantly, this work provides a reasonable reference for the preparation of efficient structure-based biomimetic composite photocatalysts.
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高影响因子
Journal of Materials Research and Technology-JMR&T
·
2022
·
IF 6.267
Fang Wang,Zhe Chen,Zhenzhou Zhu,Jia Guo
Antibiotics in pharmaceutical and aquaculture wastewater is a growing threat to the environment of world, due to the induction of drug-resistant bacteria and the harm to the aquatic organisms. Photocatalytic membrane, which has immobilized photocatalyst on membrane is an effective and environmentally friendly technology for antibiotics degradation. In this study, a novel photocatalytic membrane was prepared by loading ZnO/N-g-C 3 N 4 composite on commercial polymer membrane with glutaraldehyde as a crosslinker through pressure driven filtration. The loading of the photocatalyst over the membranes was validated by Fourier transform infrared spectroscopy, scanning electron microscope and X-ray photoelectron spectroscopy. The photocatalytic properties of ZnO/N-g-C 3 N 4 composite membrane were observed efficient for degradation of tetracycline, ciprofloxacin and ofloxacin in both immersion and filtration model under visible light (λ > 420 nm). Especially, a ZnO/N-g-C 3 N 4 loading amount of 1.12 g/cm 2 and glutaraldehyde concentration of 45% led to the degradation rate of 100% and 80% for tetracycline at 5 mg/L and 10 mg/L, respectively. Low trans-membrane pressure (0.005 MPa) and narrow membrane size (50 kDa) were favorable for antibiotics degradation in filtration model due to long reaction time on membrane surface. Construction and performance of ZnO/N-g-C 3 N 4 composite membrane might provide new strategy for energy saving wastewater treatment.
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高影响因子
ACS Applied Energy Materials
·
2021
·
IF 6.024
Qin Wang,Jiamian Huang,Chenyang Wang,Pengfei Luo,Zhili Li,Rongtao Liu,Qunaying Ma,Jun Luo
NbCoSn-based half-Heusler alloys are promising n-type high-temperature thermoelectric materials, but their relatively high thermal conductivities prevent the further improvement in thermoelectric properties. In this work, an effective way to reduce the lattice thermal conductivity without degradation of electrical transport properties via the isoelectronic substitution of Ta for Nb in NbCoSn-based alloys has been demonstrated. The synthesis and thermoelectric properties of Nb1–xTaxCoSn0.9Sb0.1 (x = 0, 0.05, 0.1, 0.15, 0.2, and 0.25) solid solutions are reported. The large mass fluctuation and chemical bond softening caused by Ta alloying significantly suppress the lattice thermal conductivity. Meanwhile, the Ta content has little effect on the carrier mobility due to the close atomic size and similar chemical nature between Ta and Nb. Benefiting from the significant reduction of lattice thermal conductivity and preservation of electrical transport performance after Ta alloying, a ZT value of ∼0.7 is achieved in Nb0.75Ta0.25CoSn0.9Sb0.1 at 973 K, which is about 32% higher than that of a NbCoSn0.9Sb0.1 matrix. This work demonstrates a valid approach to enhance the thermoelectric performances of half-Heusler alloys.
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高影响因子
Nano Energy
·
2018
·
IF 13.12
Li An,Jianrui Feng,Yu Zhang,Yong-Qing Zhao,Rui Si,Gui-Chang Wang,Fangyi Cheng,Pinxian Xi,Shouheng Sun
Transition-metal nitrides (TMNs), especially iron-based TMNs, have high electrical conductivity , superior chemical stability and unique oxygen-reaction ability, and have emerged as a new form of noble metal-free electrocatalysts . In this paper, we demonstrate that the ORR-active/OER-inert single function catalyst Fe-N can be made as the OER/ORR-active bifunctional catalyst Co-Fe-N by controlled substitution of Fe with Co. To obtain atomic insights of the Co-enhanced OER catalysis, we develop a new exfoliation method to prepare atomically thin (1.1 nm) nanosheets (NSs) of Co x Fe 1-x N 0.5 (x = 0, 0.05, 0.1, 0.15 and 0.2). Our studies show that both electronic structure and local binding environment of Fe are modified by Co substitution and the Co-Fe-N NSs show a volcano−like OER catalysis with Co 0.15 Fe 0.85 N 0.5 NSs being the most efficient OER catalyst, showing the lowest overpotential of 266 mV at 10 mA cm −2 , a Tafel slope of ∼30 mV dec −1 , and excellent stability in the 1.0 M KOH OER condition. Density functional theory (DFT) calculations suggest that the Co-Fe sites in the Co 0.15 Fe 0.85 N 0.5 structure are optimized to promote OH* to O* conversion, O*-O* coupling and O 2 formation. The Co 0.15 Fe 0.85 N 0.5 NSs are a class of new noble-metal-free catalyst for OER.
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高影响因子
RARE METALS
·
2014
·Vol. 33
·期 1
·86-90
·
IF 0.806
Zhu Xi-Lin,Han Shu-Min,Zhao Xin,Li Yuan,Liu Bao-Zhong
Hydrogen storage properties of 2LiNH 2 –MgH 2 – x NbH ( x = 0 and 0.05) composites and the catalysis of NbH on hydrogen sorption reaction of the Li–Mg–N–H system were investigated. Hydrogen sorption properties of 2LiNH 2 –MgH 2 system are effectively improved by adding NbH. Temperature programmed desorption results show the addition of NbH reduces the dehydriding onset temperature of 2LiNH 2 –MgH 2 system by 21 K. Approximate 3.62 wt% hydrogen in 2LiNH 2 –MgH 2 –0.05NbH composite is released following a 500 min at 433 K, whereas the amount of hydrogen desorption is only ~3.16 wt% for the pristine system under the same condition. The sample with NbH exhibits higher dehydriding rate compared with the pristine one. Moreover, hydrogen absorption rate increases by adding NbH into the 2LiNH 2 –MgH 2 system. Hydrogen absorption capacity of the samples with NbH is 3.23 wt% within 400 min, which is higher than that of pristine sample. Fine NbH particles homogeneously distribute in the 2LiNH 2 –MgH 2 –0.05NbH composite, and catalyze the hydrogen sorption reaction rather than reacts as a reactant into new compound.
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高影响因子
JOURNAL OF POWER SOURCES
·
2014
·
IF 5.211
Zonghua Pu,Qian Liu,Chun Tang,Abdullah M. Asiri,Abdullah H. Qusti,Abdulrahman O. Al-Youbi,Xuping Sun
In this communication, we report on the solvothermal preparation of spinel ZnCo 2 O 4 /N-doped carbon nanotube (ZnCo 2 O 4 /NCNT) composite. As a novel oxygen reduction reaction (ORR) electrocatalyst , the ZnCo 2 O 4 /NCNT composite shows high activity via a four-electron pathway in alkaline solution. Such catalyst also exhibits superior methanol tolerance ability and durability over commercial Pt/C catalyst.
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DOI
高影响因子
Journal of Materials Chemistry A
·
2019
·Vol. 7
·期 16
·9665-9672
·
IF 10.733
Kanghua Li,Siyu Wang,Chao Chen,Rokas Kondrotas,Manchen Hu,Shuaicheng Lu,Chong Wang,Wei Chen,Jiang Tang
Sb2Se3 is a promising non-toxic, Earth-abundant, stable thin-film solar cell absorber material. However, the low built-in potential caused by the low intrinsic doping density (∼1013 cm−3) and the low carrier collection efficiency due to the low carrier mobility (∼1.5 cm2 V−1 s−1) hinder further efficiency improvement of Sb2Se3 solar cells. Therefore, an effective hole-transport layer (HTL) is necessary to further boost the built-in potential and assist carrier collection. Herein we attempt to improve the efficiency of Sb2Se3 solar cells by using CuSCN as an HTL. CuSCN as an HTL suppresses the back surface recombination, and enhances the built-in potential and carrier collection efficiency. Meanwhile, materials and physical properties characterization reveals that CuSCN provides Cu ions which induce grain boundary inversion, and therefore separate photo-generated carriers more efficiently. Consequently, we obtained a device efficiency of 7.50%.
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高影响因子
Energies
·
2022
·Vol. 15
·期 8
·2908
·
IF 3.252
Cheng Wang,Yibo Wang,Zhaoping Shi,Wenhua Luo,Junjie Ge,Wei Xing,Ge Sang,Changpeng Liu
For large-scale and sustainable water electrolysis, it is of great significance to develop cheap and efficient electrocatalysts that can replace platinum. Currently, it is difficult for most catalysts to combine high activity and stability. To solve this problem, we use cobalt to regulate the electronic structure of ruthenium to achieve high activity, and use carbon matrix to protect alloy nanoparticles to achieve high stability. Herein, based on the zeolitic imidazolate frameworks (ZIFs), a novel hybrid composed of RuCo alloy nano-particles and N-doped carbon was prepared via a facile pyrolysis-displacement-sintering strategy. Due to the unique porous structure and multi-component synergy, the optimal RuCo500@NC750 material in both acidic and alkaline media exhibited eminent HER catalytic activity. Notably, the 3-RuCo500@NC750 obtained a current density of 10 mA cm−2at 22 mV and 31 mV in 0.5 M H2SO4and 1.0 M KOH, respectively, comparable to that of the reference Pt/C catalyst. Furthermore, the Tafel slopes of the catalyst are 52 mV Dec−1and 47 mV Dec−1, respectively, under acid and alkali conditions, and the catalyst has good stability, indicating that it has broad application prospects in practical electrolytic systems. This work contributes to understanding the role of carbon-supported polymetallic alloy in the electrocatalytic hydrogen evolution process, and provides some inspiration for the development of a high efficiency hydrogen evolution catalyst.
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高影响因子
CHIRALITY
·
2024
·Vol. 36
·期 2
·e23643
·
IF 2.8
Xiaojun Li,Qi Li,Liying Yang,Liqin Huang,Chenchen Peng,Jianyong Zheng
In this study, lipase-catalyzed resolution of N-acetyl-DL-methionine methyl ester (N-Ac-DL-MetOMe) was evaluated. A lipase from Brucella thiophenivorans was prone to exhibit high activity and excellent enantioselectivity toward N-Ac-DL-MetOMe to produce the key chiral intermediate N-acetyl-L-methionine methyl ester (N-Ac-L-MetOMe). The results showed that the enzymatic reaction was carried out in 100 g/L racemic substrate for 2 h, the conversion reached 51.3%, the enantiomeric excess value N-Ac-L-MetOMe exceeded 99%, and the enantiomeric ratio value >200. Therefore, the lipase from B. thiophenivorans has potential prospects for the resolution of N-Ac-DL-MetOMe to produce the important intermediate N-Ac-L-MetOMe.
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PubMed
高影响因子
JOURNAL OF PROTEOME RESEARCH
·
2024
·
IF 3.8
Huohuan Tian,Ze Tao,Wanli Zhang,Yuzhe Chen,Tao Su,Xinyuan Wang,Hao Yang,Hao Cai,Shuyun Liu,Yi Zhang,Yong Zhang
Human plasma proteomic and glycoproteomic analyses have emerged as an alternate avenue to identify disease biomarkers and therapeutic approaches. However, the vast number of high-abundance proteins in plasma can cause mass spectrometry (MS) suppression, which makes it challenging to detect low-abundance proteins (LAP). Currently, immunoaffinity-based depletion methods and strategies involving nanomaterial protein coronas have been developed to remove high-abundance proteins (HAP) and enhance the depth of plasma protein identification. Despite these advancements, there is a lack of systematic comparison and evaluation of the qualitative and quantitative effects of different strategies on the human plasma proteome and glycoproteome. In this study, we evaluated the performance of four depletion methods including combinatorial peptide ligand libraries (CPLL), Top 2, Top 14, and the nanomaterial protein corona formed by magnetic nanoparticles (MN) in both plasma proteomics and N-glycoproteomics. Compared to the CPLL, Top 2, and Top 14 strategies, the MN approach significantly increased the number of identified peptides and proteins. However, it demonstrated a relatively lower efficacy in identifying intact N-glycopeptides and N-glycoproteins. In contrast, the immunoaffinity-based depletion methods are better suited to glycoproteomics due to higher identification numbers. We believe that this work provides valuable insights and options for various research objectives, as well as clinical applications.
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PubMed
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-12
·
IF 15.7
Zheng Yizhen,Lin Xing,Li Jiongzhao,Chen Jianan,Wu Wenhao,Song Zixuan,Gao Yuan,Hu Zhuang,Wang Huifeng,Ye Zikang,Qin Haiyan,Peng Xiaogang
Quantum-dot optoelectronics, pivotal for lighting, lasing and photovoltaics, rely on nanocrystalline oxide electron-injection layer. Here, we discover that the prevalent surface magnesium-modified zinc oxide electron-injection layer possesses poor n-type attributes, leading to the suboptimal and encapsulation-resin-sensitive performance of quantum-dot light-emitting diodes. A heavily n-doped nanocrystalline electron-injection layer—exhibiting ohmic transport with 1000 times higher electron conductivity and improved hole blockage—is developed via a simple reductive treatment. The resulting sub-bandgap-driven quantum-dot light-emitting diodes exhibit optimal efficiency and extraordinarily-high brightness, surpassing current benchmarks by at least 2.6-fold, and reaching levels suitable for quantum-dot laser diodes with only modest bias. This breakthrough further empowers white-lighting quantum-dot light-emitting diodes to exceed the 2035 U.S. Department of Energy’s targets for general lighting, which currently accounts for ~15% of global electricity consumption. Our work opens a door for understanding and optimizing carrier transport in nanocrystalline semiconductors shared by various types of solution-processed optoelectronic devices.
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Li Ren,Wen Zhu,Qiuyu Zhang,Chong Lu,Fengzhan Sun,Xi Lin,Jianxin Zou
Magnesium hydride (MgH 2 ) is one of the most promising hydrogen storage materials, while the high desorption temperature and sluggish kinetics hamper its further commercialization. Herein, a novel MOF-derived 1D N-doped hierarchically porous carbon nanofiber (pCNF) is firstly prepared and used as the scaffold for self-assembly of MgH 2 /Ni nanoparticles (NPs). The resultant MgH 2 /Ni@pCNF nanocomposites show faster desorption kinetics ( E a = 96.58 kJ/mol H 2 ), lower onset desorption temperature ( T onset = 200 °C) when compare to the commercial MgH 2 ( E a = 142.27 kJ/mol H 2 , T onset = 350 °C). Moreover, hydrogen absorption can be achieved at a temperature as low as 100 °C with a capacity of 2.2 wt% within 120 min. Additionally, the composites exhibit excellent cycling stability with a capacity retention over 95.4% after 10 complete re-/dehydriding cycles at 300 °C. In-situ HRTEM observations of the desorption process combined with XPS and XRD indicate that the synergistic effects from nanoconfinement of Mg/MgH 2 in pCNF, electron-donating ability of N atoms and the “hydrogen pump” function of Mg 2 Ni/Mg 2 NiH 4 account for the unprecedent hydrogen storage properties. The strategy of using the MOF-derived 1D pCNF as support for nanoparticles provides a new approach for fabricating nanostructured energy materials with enhanced performances.
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高影响因子
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