Nanomaterials
·
2023
·Vol. 14
·期 1
·74
·
IF 5.3
Xin Zhong,Meihuan Ji,Wenxin Wu,Caicai Lu,Wenping Liu,Fubin Jiang
In this work, the heterojunctions of CuInS2embedded in the g-C3N4materials (xCuInS2/g-C3N4, abbreviated as xCIS/GCN) was successfully prepared for peroxymonosulfate (PMS) activation under visible light. The catalysts are characterized by different techniques, such as XRD, FTIR, SEM, TEM, and UV-vis. The unique heterojunction composites can suppress the recombination of photogenerated pairs. The catalytic results showed that the 3CIS/GCN exhibited excellent catalytic levofloxacin (LVF) degradation efficiency, while more than 98.9% of LVF was removed in 60 min over a wide pH range. SO4•−, O2•−, OH•, and1O2were verified as the main reactive species for LVF degradation via the quenching experiments and electron paramagnetic resonance technology (EPR). The synergetic effect of xCIS/GCN, PMS, and visible light irradiation was discussed. The possible LVF degradation pathway was proposed through byproducts analysis (LC-MS). Moreover, the 3CIS/GCN/vis-PMS system has very low metal leaching. Owing to xCIS/GCN having good properties for PMS activation, it has potential applications for LVF or other hazardous pollutants degradation.Keywords:peroxymonosulfate;visible-light-assisted PMS activation;antibiotics
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
Nano Research
·
2022
·Vol. 16
·期 6
·8405-8410
·
IF 10.269
Cao Renfei,Cui Yangfeng,Huang Gang,Liu Wanqiang,Liu Jianwei,Zhang Xinbo
Li-O 2 batteries with extremely high specific energy density have been regarded as a kind of promising successor to current Li-ion batteries. However, the high charge overpotential for the decomposition of Li 2 O 2 discharge product reduces the energy efficiency and triggers a series of side reactions that cause the Li-O 2 batteries to have a limited lifetime. Herein, Co-doped C 3 N 4 (Co-C 3 N 4 ) photocatalysts were designed by an in situ thermal evaporation method to take advantage of the photo-assisted charging technology to conquer the shortcomings of Li-O 2 batteries encountered in the charge process. Different from the commonly used photocatalysts, the Co-C 3 N 4 photocatalysts perform well no matter with and without illumination, owing to the Co doping induced conductivity and electrocatalytic ability enhancement. This makes the Co-C 3 N 4 reduce the charge and discharge overpotentials and improve the cycling performance of Li-O 2 batteries (from 20 to 106 cycles) without illumination. While introducing illumination, the performance can be further improved: Charge voltage reduces to 3.3 V, and the energy efficiency increases to 84.84%, indicating that the Co-C 3 N 4 could behave as a suitable photocathode for Li-O 2 batteries. Besides, the low charge voltage and the continuous illumination together weaken the corrosion of the Li anode, making the long-term high-efficiency operation of Li-O 2 batteries no longer just extravagant hope.
研究领域:
材料科学
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电化学
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能源技术
✓ 已验证
产品关联
DOI
高影响因子
Chemical Science
·
2024
·
IF 7.6
Yinglei Tao,Tao Wang,Xingyu Yu,Ke Gong,Hao Gong,Haixia Chen,Xiaoli Fan,Aidi Zhang,Xianli Huang,Kun Chang,Jianping He
Li–O2 batteries (LOBs) boast an exceptionally high theoretical energy density; however, the slow kinetics of the oxygen electrode reaction have been a significant hurdle in their advancement and practical application. In this study, a composite of bismuth oxyhalide heterojunction incorporated with metal–organic frameworks (MOFs) was engineered on carbon cloth (Zr-MOF/BiOIBr/CC) as an efficient bifunctional catalyst to enhance the oxygen electrode reaction in photo-assisted LOBs. Compared to Zr-MOF/CC, Zr-MOF/BiOIBr/CC significantly expands the light absorption spectrum of the catalyst. Furthermore, the built-in electric field in the heterojunction aids in the separation and directional movement of photogenerated carriers, thereby expediting the reaction kinetics of LOBs. Consequently, the photo-assisted LOBs with Zr-MOF/BiOIBr/CC as the cathodes display a discharge potential of 3.05 V, a low charge potential of 3.20 V, and an energy efficiency of up to 95.3%, and can sustain an extended cycle life of over 255 cycles. This study underscores the potential application of MOFs/semiconductor heterostructural materials in photo-assisted LOBs and offers insights into the systematic design of photo-assisted air batteries and other advanced semiconductors.
研究领域:
材料科学
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电化学
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能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2020
·
IF 7.1
Di Liu,Zilong Tang,Zhongtai Zhang
SnS 2 is a promising candidate for NO 2 sensing applications due to its suitable band gap and large electronegativity. However, SnS 2 based gas sensors are still restricted to detect NO 2 gas at room temperature due to their giant resistance and poor recovery. Here, we report hollow SnO 2 @SnS 2 nanostructures prepared by a one-step hydrothermal method. The SnO 2 @SnS 2 based sensor showed high response and good recovery to ppb-level NO 2 under visible illumination at room temperature (25 °C). The superior sensing performance of the SnO 2 @SnS 2 sensor was attributed to the hollow porous heterojunction structure beneficial for gas diffusion, as well as visible light assistant facilitating charge transfer and gas desorption. This work systematically studied the influence of oxygen concentration in background gas on the NO 2 sensing performance of the SnO 2 @SnS 2 sensor, and proposed a physical adsorption model for the NO 2 sensing mechanism of the SnO 2 @SnS 2 sensor under visible light at room temperature. In addition, the effect of humidity on the gas sensing performance of the SnO 2 @SnS 2 sensor to different concentrations of NO 2 was also discussed.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
IEEE Journal of Photovoltaics
·
2024
·Vol. 14
·期 4
·583-591
·
IF 2.5
Juan Hong,Jianxin Sun,Xin Liu,Yixuan Huang,Longqing Jiang,Shuangyu Liu,Feng Qian,Shen Honglie,Yang Yang,Rulong Chen,Guanghua Song
In the present study, we establish a physical model for laser-assisted localized boron doping in N-type tunnel oxide passivated contact (TOPCon) solar cells by employing the fluid dynamics method. Our simulations reveal that a flat-top beam inflicts less thermal damage on silicon than a Gaussian beam at a constant laser energy density. Additionally, we observe an acceleration in the flow rate of molten silicon in the molten pool as the laser energy density increases. This acceleration facilitates efficient doping of boron atoms into the silicon substrate, albeit accompanied by an expansion of the local thermal damage range. In light of these findings, we utilized boron-doped silicon paste as a doping source in experiments conducted on a 15 MW TOPCon solar cells production line employing four distinct laser energy densities. The experiments yielded a reduction in the sheet resistance to 81.9 Ω/cm in the boron-doped regions, an increase in the peak boron doping concentration to 1.08 × 10
19
atoms/cm
3
, and a doping depth of 2.38
μ
m. Consequently, the highest efficiency enhancement recorded was 0.14%, culminating in an efficiency of 25.06%. This research outlines the mechanism of the laser-assisted localized boron doping process and provides insights for enhancing the efficiency of TOPCon solar cells.
研究领域:
光伏技术
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半导体器件
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材料科学
✓ 已验证
DOI
高影响因子
Advanced Energy Materials
·
2025
·
IF 26
Houliang Sun,Zaka Ullah,Ledi Chen,Wanting Li,Hengfei Chen,Xiaowei Guan,Xiaowei An,Mingliang Chen,Liwei Liu,Qi Li
Photo-assisted battery electrodes typically rely on solid-state metal-ion systems, which face challenges such as low wettability and poor electrode kinetics, limiting their performance. This work introduces a significant breakthrough in photo-assisted liquid battery technology by developing an organic liquid cathode based on azobenzene compounds dissolved in high-polarity ether solvents. The bifunctional electrode integrates photoelectric conversion and energy storage capabilities, enabling efficient electron transfer under light illumination. Experimental results demonstrate that the liquid electrode exhibits a 62.6% higher discharge capacity under light compared to dark conditions. Additionally, the charge transfer resistance is reduced to 0.14% of that in solid-state counterparts, while the diffusion coefficient increases by 18.62 times under dark conditions. Upon illumination, the resistance is further reduced, and the diffusion coefficient is significantly enhanced, accompanied by a notable increase in pseudocapacitive contributions. These enhancements highlight the exceptional photo-enhanced performance of the liquid electrode. By overcoming the limitations of traditional solid-state systems, this innovation paves the way for next-generation energy storage solutions with superior efficiency and multifunctionality, offering promising applications in advanced energy technologies.
研究领域:
材料科学
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能源技术
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Luwei Peng,Wenshuang Lou,Lulu Li,Yang Zhang,Xi Luo,Nengneng Xu,Jinli Qiao
CO 2 , as one of the greenhouse gases, actually represents a cheap and abundant C1 fuel to produce fuels and chemical stocks. Herein, inspired by photocatalysis and electrocatalysis, we have successfully synthesized a series of copper and bismuth oxides with heterostructure by a first co-electrodeposition method and then by thermal treatment at different temperatures. The bimetallic oxide (Cu 2 O/β-Bi 2 O 3 ) at 300 °C with the main exposure of β-Bi 2 O 3 (2 0 1) planes shows the beautiful micro-flower morphology with numerous petals in thickness around 20 ∼ 40 nm. Therefore, the Cu 2 O/β-Bi 2 O 3 heterostructure with active edge sites can electrochemically convert CO 2 into formate with a promising Faradaic efficiency (96.3 %) and current density (40.4 mA cm −2 ) at − 0.97 V vs. RHE. Specifically, the current density of Cu 2 O/β-Bi 2 O 3 bimetallic catalyst can be largely enhanced to 48.5 mA cm −2 at − 0.92 V vs. RHE with the assistance of light compared to the 30.1 mA cm −2 without light. The production rate of formate with the assistance of light can also be increased to 705.1 μmol h −1 cm −2 , superior to that of 536.4 μmol h −1 cm −2 without light. Such an excellent photo-assisted electrochemical CO 2 reduction performance is due to the fast charge-transfer process between Cu 2 O and β-Bi 2 O 3 . This study may provide a new route to directly synthesize the photoactive electrocatalysts with more edge sites and heterojunction for promoting electrochemical CO 2 reduction performance with the assistance of light field.
研究领域:
材料科学
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环境科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2024
·
IF 4.3
Guolin Yang,Ling Wei,Xin Wang,Xudong Wu,Yizhou He,Guo Li,Tao Chen,Wenkun Zhu
The zero-valent iron (ZVI) has attracted increasing attention due to the enhanced reactivity of ZVI to uranium wastewater. However, ZVI practical application is hampered due to its susceptibility to oxidation and the formation of passivation layers during storage and in situ restoration. To address these issues, we used a biosulfuration approach to modify ZVI for application in uranium ore wastewater treatment. A series of physicochemical characterization tools and photoelectronic analyses showed that BS-ZVI considerably increased carrier separation efficiency and visible light absorption capacity, resulting in a significant photoassisted enhancement effect on uranium extraction. Accordingly, the uranium removal efficiency of BS-ZVI reached 91% within 60 min, and its maximum adsorption capacity was 336.3 mg/g. By analyzing the mechanism, the improved U(VI) removal performance was mostly responsible on the dissolution of the passivation layer on the surface of ZVI, the generation of Fe(II) and FeS, and the important role of Shewanella putrefaciens extracellular polymers (EPS). Overall, the BS-ZVI biohybrid merges with the high activity of ZVI, bio-FeS, and self-regeneration ability of bacteria, expanding a promising new approach for sustainable treatment of uranium mine wastewater.
研究领域:
环境科学
·
微生物学
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材料科学
✓ 已验证
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DOI
PubMed
高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Ruiyang Tang,Hui Li,Yu Zhang,Yunbo Zhao,Yang Wu
Designing appropriate semiconductors for photo-assisted supercapacitor serves as a promising means to maximize solar energy use. The efficiency of photogenerated carrier separation is a key to improving the energy storage performance of semiconductor-based photoelectrodes. In this study, we applied dopant-defect engineering to fabricate MnCo 2 O 4 with N doping and oxygen vacancies containing (N-Ov-MCO) for use as a photo-assisted supercapacitor electrode. N doping promoted the generation and effective separation of photogenerated electron-hole pairs under light. In addition, the formed oxygen vacancy facilitates OH − adsorption on the N-Ov-MCO surface combined with DFT simulation findings. As a result, the specific capacitance of N-Ov-MCO (567.25 F g −1 ) at 1 A g −1 under illumination is 1.28 times greater than that of the original MCO. A red LED shone brighter under light when three N-Ov-MCO-based devices (N-Ov-MCO//AC) were linked in series, which demonstrated its practical potential. In the N-Ov-MCO//AC, the photogenerated electrons were introduced into the circuit via nickel foam, which aided in the charging process and the photogenerated holes along with OH − were involved in in the oxidation process. This study revealed that dopant-defect engineering efficiently improves the photo-assisted supercapacitor performance and offers a basis for the theory on practical applications.
研究领域:
材料科学
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能源存储
·
光电化学
✓ 已验证
产品关联
DOI
高影响因子
Carbon Energy
·
2024
·Vol. 6
·期 9
·e535
·
IF 19.5
Zhimin Niu,Yan Gao,Tianhui Wu,Fei Zhang,Ran Zhao,Zijia Chen,Yiming Yuan,Tifeng Jiao,Jianmin Gu,Li Lu,Desong Wang
Rechargeable neutral aqueous zinc−air batteries (ZABs) are a promising type of energy storage device with longer operating life and less corrosiveness compared with conventional alkaline ZABs. However, the neutral ZABs normally possess poor oxygen evolution reactions (OERs) and oxygen reduction reactions performance, resulting in a large charge–discharge voltage gap and low round-trip efficiency. Herein, we demonstrate a sunlight-assisted strategy for achieving an ultralow voltage gap of 0.05 V in neutral ZABs by using the FeOOH-decorated BiVO 4 (Fe-BiVO 4 ) as an oxygen catalyst. Under sunlight, the electrons move from the valence band (VB) of Fe-BiVO 4 to the conduction band producing holes in VB to promote the OER process and hence reduce the overpotential. Meanwhile, the photopotential generated by the Fe-BiVO 4 compensates a part of the charging potential of neutral ZABs. Accordingly, the energy loss of the battery could be compensated via solar energy, leading to a record-low gap of 0.05 V between the charge and discharge voltage with a high round-trip efficiency of 94%. This work offers a simple but efficient pathway for solar-energy utilization in storage devices, further guiding the design of high energy efficiency of neutral aqueous ZABs.
研究领域:
材料科学
·
能源存储技术
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
WATER RESEARCH
·
2025
·
IF 12.4
Yang Wang,Ziyuan Huang,Zhang Yan,Zhenchao Lei,Huanxin Ma,Chunhua Feng
Acid mine drainage (AMD) is characterized by high concentrations of Fe(II) and Fe(III), which can be harnessed for the in-situ formation of schwertmannite, enabling the efficient immobilization of toxic heavy metals. However, existing biological and chemical methods for schwertmannite synthesis face significant challenges, including low Fe(II) oxidation rates and particularly limited Fe(III) precipitation efficiency in acidic environments. In this study, we develop a visible light-assisted photo-electrochemical (PEC) system that effectively overcomes these barriers. By leveraging anodically evolved O 2 and cathodically generated OH − , we achieved facile Fe(II) oxidation at pH 3.0, and an impressive Fe(III) precipitation efficiency of 82.8 %, significantly exceeding the < 30 % efficiency reported by other methods. Mössbauer spectroscopy and X-ray diffraction confirmed that the generated minerals are high-purity schwertmannite. Experimental and theoretical analyses revealed that in the presence of cathodic alkalinity, Fe(III) undergoes further hydrolysis to form [(H₂O) 3 Fe(OH) 2 (SO 4 )] − species, which are thermodynamically capable of spontaneous polymerization and mineralization. Furthermore, the photoreduction of [(H₂O) 4 Fe(SO 4 ) 2 ] − within the PEC system, followed by subsequent oxidation, plays a crucial role in facilitating Fe(III) mineralization. The PEC system also effectively transformed As(III) to As(V) and Cr(VI) to Cr(III) in AMD, promoting their immobilization in the resultant schwertmannite.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Yan Cheng,Cheng Yang,Tianxue Zhu,Che Wu,Jianying Huang,Yuekun Lai
Due to its widespread availability and spontaneity, moisture electricity generation (MEG) holds unique advantages in self-powered systems. However, it faces challenges, including the limitations of relying on a single kind of power generation and insufficient output performance. Inspired by the mechanisms of water absorption of plants, this paper explores a light-moisture coordinated electricity generating hydrogel (L-MEGH) device with flexible, scalable, and highly efficient energy conversion performance, which is obtained through the UV polymerization of hydrophilic acrylamide (AAM) and phytic acid (PA) in the presence of photosensitizers. The obtained hydrogel demonstrates superior moisture absorption and remarkable electricity generation stability across a range of humidity conditions. Notably, the open-circuit voltage ( V oc ) of the L-MEGH increased from 0.675 to 0.838 V after the addition of photosensitizers (Erythrosin B, E) (the significant enhancement, up to 24%), and the short-circuit current ( I sc ) reaching 635.543 µA. This L-MEGH can realize stable electrical output even under extreme temperatures, producing 0.5 V at −20 °C for 45 h. The scalable L-MEGHs (connected on-demand in series/parallel) can power various commercial electronics, including nighttime illumination, mobile phones, and health monitoring sensors. This work pioneers a sustainable power generation pathway capable of enhancing performance through the hybrid collection of multiple natural energy sources.
研究领域:
材料科学
·
能源技术
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）