APPLIED CATALYSIS B-ENVIRONMENTAL
·
2024
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IF 20.2
Yingnan Cao,Chi Zhang,Wenchao Wang,Yunni Liu,Ying Tao,Jinchen Fan,Ming Chen,Dieqing Zhang,Guisheng Li
Photo-assisted electrocatalytic (PAEC) CO 2 conversion is a crucial approach for achieving sustainable carbon neutrality. Here, we have developed a binary-junctions photoanode by integrating SrTiO 3 and anatase-rutile TiO 2 nanotube arrays (STO/A-R TNTAs), which exhibits exceptional activity and selectivity in converting CO 2 to HCOOH. The synergetic effects of the SrTiO 3 /TiO 2 heterogeneous junction and the anatase-rutile TiO 2 heterophase junction effectively facilitate photoelectron separation and storage, leading to a potential difference between anode and cathode. The establishment of the electron storage strategy, triggered by hetero- junction/phase interfaces, serves as remarkably efficient electron trapping regions with dam-like characteristics. As a result, the STO/A-R TNTAs achieves a generation rate of 68.24 μmol cm −2 h −1 with 92.25% selectivity and 90.70% Faradic efficiency. This performance is approximately 8 times higher compared to the pristine TiO 2 nanotube arrays photoanode. The implementation of the electron storage mechanism presents a promising approach to improve CO 2 reduction activity and selectivity.
研究领域:
材料科学
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环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMOSPHERE
·
2021
·
IF 7.086
Bo Jiang,Jun Bai,Lin Li,Nan He,Qian Zhang,Bingsen Wang,Dawei Tang
The photocatalytic fuel cell (PFC) is a promising energy conversion technology for effective solar energy utilization, wastewater treatment , and electricity generation by photoelectrochemical reactions. Nevertheless, the discharging current output and stability of the PFC are still plagued by the low photoelectron conversion efficiency and time-varying light intensity , respectively. Herein, we integrated a RuO 2 capacitive layer and a TiO 2 photocatalytic layer into a capacitive photoanode, finally designing a PFC with the capacitive photoanode. Not only can the successful integration of the capacitive layer augment the discharging current, but it can also balance the solar intensity fluctuation by the ability of electron storage. The capacitive photoanode showed a high areal capacitance of 1040.7 mFcm −2 at a current density of 0.5 mAcm −2 , was continuously charged and discharged for 1000 cycles, and maintained 87 % of the original capacitance after cycles. The superior rate capability, high capacitance, and good cycle performance of the capacitive photoanode originate from the “crack mud” structure in the capacitive layer. The discharging current of the capacitive photoanode was 32.0 mAcm −2 under one sun illumination, and the electrochemical performance of the capacitive photoanode was better than that of the conventional TiO 2 photoanode. The capacitive photoanode PFC possessed a maximum short-circuit current of 300.0 μA ⋅ cm −2 at the beginning of discharge, which is independent of the light intensity. The capacitive photoanode PFC adopts a new working mode and provides a unique solution for the practical application of PFC.
研究领域:
能源科学
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环境科学
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材料科学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2025
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IF 8.3
Xiaoyan Wang,Yu Yuan,Jingru Lai,Xiaoli Shi,Mingye Ding
Solar-driven water splitting for hydrogen production is a pivotal technique for sustainable energy conversion. However, its efficiency is constrained by intermittent solar irradiation and rapid charge recombination. To overcome these limitations, designing a round-the-clock photocatalyst with high charge storage capacity that can still operate effectively under low light flux after sunset and promote charge carrier separation is a promising strategy. Herein, by selecting SrAl 2 O 4 :Eu 2+ /Dy 3+ persistent phosphors as electron-trapped centers and g-C 3 N 4 semiconductor as visible-light photocatalyst, SrAl 2 O 4 :Eu 2+ /Dy 3+ @g-C 3 N 4 composite has been successfully synthesized via in-situ growth strategy to form a conventional type II heterojunction photocatalyst. Benefiting from the excellent ability of charge storage and release from electron traps and the improved electron-hole separation efficiency, the designed round-the-clock photocatalyst exhibits the improved hydrogen production from 153.8 μmol g −1 h −1 to 560 μmol g −1 h −1 under visible-light irradiation, infrared-light-driven H 2 production of 932 μmol g −1 for 3 h and a dark activity of 269.1 μmol g −1 h −1 lasing for 0.5 h. This work provides a promising strategy for designing a highly efficient photocatalyst for wide-spectral-responsive and all-weather photocatalytic hydrogen production.
研究领域:
材料科学
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能源化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Shouwu Xu,Zhilong Zhang,Hailin Zhang,Zhiwei Li,Haoping Peng,Sibudjing Kawi,Aijun Xie,Ping Qiu
The development of a photoelectrochemical cathodic protection film with electron storage capabilities offers a feasible method for metal protection in the absence of light. In this study, we designed and fabricated an innovative TiO 2 /ZIF-67 composite film in situ. The synthesized ZIF-67 nanoparticles with a dodecahedral structure not only facilitate contact with the electrolyte but also significantly broaden the sunlight absorption range. When coupled with 304 SS, the TiO 2 /ZIF-67-20 composite film demonstrated a minimum OCP value of −0.675 V (vs. SCE) under illumination. Notably, even after 10 h of light deprivation, the OCP remained lower than that of 304 SS. This sustained protection can be attributed to the electronic storage and release capabilities of the Co element within the TiO 2 /ZIF-67 composite, ensuring continuous cathodic protection for 304 SS during both illuminated and dark conditions. This study contributes valuable insights into achieving all-weather cathodic protection for 304 SS.
研究领域:
材料科学
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腐蚀与防护
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Jing Tian,Feng Qian,Meijing Cao,Jiaqi Gong,Jiarun Li,Lei Wang,Minge Tian,Zhuoyuan Chen
Most of the photoelectrodes for photoelectrochemical cathodic protection (PECCP) technology reported at present cannot store electrons, leading to the inability to protect metals in the absence of light, which becomes the main defect that limits the practical application of PECCP . In this work, a Mo doping WO 3 /CdZnS heterojunction photoelectrode with electrons storage capability was prepared, by which the PECCP can be kept running in the absence of light. The result of theoretical calculation of density functional validates that Mo doping can introduce new doping levels into WO 3 , leading to modifications in the intrinsic electronic structure associated with increasing capacitance and conductivity. The compounding of CdZnS can not only broaden the light absorption threshold of the photoelectrode, but also charge the Mo-WO 3 . Besides, the construction of heterojunction also facilitates the oriented separation and migration of photogenerated carriers. The 0.3%Mo-WO 3 /CdZnS-2 composite photoelectrode with desirable capacity of electron storage can store the quantity of electric charge about 1.87 × 10 −3 C after 100 s illumination, which is about 1.5 times of WO 3 /CdZnS-2 without Mo doping. In the meanwhile, the persistent PECCP performance in the absence of light was also prolonged from 481 s to 584 s.
研究领域:
材料科学
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电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
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2025
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IF 7.9
Jiajia Cai,Yongjun Li,Zhi Zhang,Aobo Cui,Zhengxin Cai,Qian Xie,Jianmin Wang
The low sustainable current density in darkness restricts the advancement of photocathodic protection (PCP) for steels in marine environments. A combination of MoO 3 /WO 3 (Mo/WO 3 ) was proposed as an electron storage system to enhance capacitance and charge/discharge rates. Subsequently, incorporating ZnIn 2 S 4 (ZIS) extended light harvesting and improved photocarrier separation efficiency, resulting in efficient round-the-clock PCP performance. Under illumination, the open circuit potential (OCP) of 10Mo/WO 3 @ZIS coupled with 304SS reaches −0.97 V vs. Ag/AgCl, approximately 600 mV and 140 mV more negative than corrosion potential (E corr ) of 304SS and WO 3 @ZIS coupled 304SS, whth photocurrent density of 134 μA/cm 2 . The excellent PCP performance is attributed to superior photocarrier separation and enhanced light-harvesting capability. Notably, in the dark, the OCP of the coupled system remains ca . 0.4 V below the E corr of 304SS, with an average current density of 30 μA/cm 2 , demonstrating the regulated electron storage capabilities of Mo/WO 3 . Furthermore, capacity and charge/discharge rates correlate with Mo/W ratio and electrolyte species. 10Mo/WO 3 @ZIS exhibits a charge capacity of 2.93 mC, nearly 3 times higher than that of WO 3 @ZIS. The innovative application of MoO 3 and WO 3 proves the potential to regulate the electron storage performance, revealing the factors for photoelectron storage/release.
研究领域:
材料科学
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电化学
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海洋工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
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2021
·Vol. 27
·期 45
·11589-11599
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IF 5.236
Yuying Yang,Zhuoyuan Chen,Chang Feng,Jiangping Jing
Graphical Photo-electrochemical cathodic protection technology is considered to be a green metallic corrosion protection technology that uses solar energy to protect against corrosion without consuming any anode materials. A CdIn 2 S 4 /WO 3 nanosheet composite film with electron self-storage properties was synthesized and used as a photoelectrode to couple with metallic materials to provide photo-electrochemical cathodic protection under light illumination and continuing cathodic protection in the dark. This research will promote the practical application of photo-electrochemical cathodic protection technology. Photo-electrochemical cathodic protection (CP) technology is considered to be a green metallic corrosion protection technology that uses solar energy to protect from corrosion and does not consume any anode materials. In this work, a CdIn 2 S 4 /WO 3 nanocomposite photoelectrode was prepared, and its photo-electrochemical CP performance and mechanism were studied and analyzed. WO 3 has a well band matching with CdIn 2 S 4 , leading to a significantly enhanced photo-electrochemical CP performance of the nanocomposite. Meanwhile, as confirmed in this work, the CdIn 2 S 4 /WO 3 nanocomposite can store photoinduced electrons under light illumination through intercalation reactions and changing the valence state of tungsten. Moreover, it can discharge in the dark state to provide continuous CP for the coupled metals. This research will promote the practical application process of the photo-electrochemical CP technology.
研究领域:
材料科学
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电化学
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腐蚀科学
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可再生能源
✓ 已验证
DOI
PubMed
高影响因子
INORGANIC CHEMISTRY
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2024
·
IF 4.3
Ying Su,Xiaodong Liu,Haoyu Wang,Yijia Hao,Lianyue Guan,Weilin Chen
Designing friction materials with high electron storage capacity, high work function, low cost, and high stability is an important method to improve the output performance of a triboelectric nanogenerator (TENG). Here, we report two kinds of friction materials based on Keggin-type polyoxometalates (POMs)-modified graphite carbon nitride (g-C3N4), namely, g-C3N4@PMo12 and g-C3N4@PW12, and form TENG with commercial indium tin oxide/poly(ethylene terephthalate) (ITO/PET) electrodes. The performance test shows that the g-C3N4@PMo12 TENG device exhibits a high output voltage of about 78 V, a current of about 657 nA, and a transfer charge of about 15 nC, which is more than 3 times higher than that of unmodified TENG. This performance improvement is attributed to the fact that POM loaded on the surface of g-C3N4 can be used as a shallow electron trap to increase the electron storage capacity through electron interaction and to increase the charge density on the surface of the material by increasing the work function of the composite. This work not only broadens the choices of TENG friction materials but also offers a practical means of enhancing TENG’s output performance.
研究领域:
材料科学
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能源技术
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纳米科技
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Xiaran Su,Yuming Dong,Yongfa Zhu,Haifeng Shi
Polyethylene terephthalate plastic is widely used and poses challenges in degradation, highlighting the importance of finding efficient degradation methods. In this study, MIL-125-NH 2 /BNQDs composites were synthesized to degrade polyethylene terephthalate plastic in the peroxymonosulfate-activated persistent photocatalysis system. The results showed that MIL-125-NH 2 /2BNQDs exhibited the best degradation effect on polyethylene terephthalate plastic activated by peroxymonosulfate under light conditions, with a degradation efficiency of 95.71 % achieved by adding 3 mM peroxymonosulfate, which was 3.01 times that of MIL-125-NH 2 alone. Furthermore, all composite samples retained persistent catalytic activity under dark conditions after light irradiation. After visible light irradiation, the polyethylene terephthalate degradation efficiency achieved 90.23 % when MIL-125-NH 2 /2BNQDs activated by peroxymonosulfate were used under dark conditions. The mechanism of action of reactive radicals in the polyethylene terephthalate degradation process was revealed by scavenger experiments. In-situ X-ray photoelectron spectroscopy analysis demonstrated that MIL-125-NH 2 /2BNQDs induce Ti 4+ to Ti 3+ transition through electron transfer, resulting in higher efficiency of peroxymonosulfate activation. The composites achieve improved electron storage capacity and enhanced peroxymonosulfate activation efficiency. Furthermore, the alteration of valence in transition metals (from Ti 4+ to Ti 3+ ) triggers photochromism, which amplifies the ability to absorb light. This study provides new insights for the development of novel photocatalysts for environmentally friendly degradation of polyethylene terephthalate plastics, contributing to the removal of plastic waste and the promotion of resource sustainability.
研究领域:
环境科学
·
材料科学
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催化化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2024
·
IF 3.3
Kuo Shen,Ruiting Zhang,Yahong Jin,Yanmei Li,Yihua Hu
X-ray storage phosphors are found wide-ranging applications in medical diagnosis, nondestructive testing and X-ray imaging. However, designing X-ray storage phosphors with high electron storage capacity still poses a daunting challenge. In this study, we designed a fluorescent powder based on Eu 2+ -doped BaSiO 3 , demonstrating excellent optical information storage characteristic. Under high-energy X-ray filling, shallow traps exhibit low electron capacity and only produce weak afterglow, which greatly helps to minimize the impact of afterglow on the image quality during X-ray imaging. In addition, the deep traps at 1.01 eV filled with high-energy X-ray allow the material to store information for a long time. The crystal structure, photoluminescence (PL) and thermoluminescence (TL) spectra were studied systematically. The electron trapping properties of the material were analyzed using TL spectroscopy. Finally, we fabricated a flexible film with phosphors, the flexible film has been utilized to demonstrate high-quality real-time X-ray imaging and achieve time-delayed X-ray imaging of curved objects, such as flexible circuit boards.
研究领域:
材料科学
·
医学成像
·
放射学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）