CRYSTAL GROWTH & DESIGN
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2024
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IF 3.2
Furong Ye,Wen Liu,Changcun Han,Yahao Zhao,Peng Liu,Hui Wang
This study introduces Au nanoparticles into ZnIn2S4 through electrodeposition to overcome the limitation of rapid charge carrier recombination on the photoelectrochemical efficiency. The strong coupling of Au nanoparticles with the FTO substrate not only serves as an electron acceptor but also exhibits a surface plasmon resonance (SPR) effect, significantly enhancing charge carrier separation efficiency. Experimental results demonstrate that the introduction of Au nanoparticles notably improves the light absorption capability of ZnIn2S4, enhancing its solar energy conversion efficiency and rendering it an effective photoelectrocatalytic catalyst. Electrochemical analysis shows that the modified sample achieves a photocurrent density of 0.52 mA/cm2 at 1.23 V (vs RHE), which is 2.15 times that of pure ZnIn2S4, validating the potential of this approach for photoelectrocatalytic applications.
研究领域:
材料科学
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能源转换
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Kehui Xue,Lianqing Yu,Chong Liu,Huihua Luo,Zhe Li,Yaping Zhang,Haifeng Zhu
Charge transport and metal site stability play a critical role on realizing efficient solar water splitting in photoelectrochemical devices. Here, we investigated BiVO 4 -based composite photoanodes (labelled as NF@PTA/2PACz/BVO) in which BiVO 4 , [2-(9H-carbazol-9-yl) ethyl] phosphonic acid (2PACz) hole transport layers based on self-assembled monolayers (SAMs), and terephthalic acid (PTA)-functionalized NiFeOOH (NF@PTA) oxygen evolution cocatalysts (OECs) structurally similar to the OECs in natural photosystem II, were assembled sequentially. Alignment of energy levels and stabilization of metal sites can be achieved by this layer-designed structure. And the uncoordinated ( COOH) carboxylate groups can accelerate the proton transfer. Fundamental investigations reveal that the NF@PTA/2PACz/BVO photoanode exhibits unique properties including passivated surface traps, excellent carrier density and lifetime, enlarged photovoltage, and smoother hole transport band structure. Consequently, the optimum NF@PTA/2PACz/BVO photoanode shows the photoelectrochemical (PEC) performance of 5.43 mA cm −2 at 1.23 V vs reversible hydrogen electrode with an applied bias photon-to-current efficiency of 1.45 %. The coupled C O Fe bond between the coordinating carboxylate and the metals not only inhibits the leaching of the metal species but also maintains a steady photocurrent density over 20 h of stability test. Our work paves the way for the development of more efficient PEC cells with superior charge separation and breakthroughs in the stability of metal active sites, thus broadening their potential applications.
研究领域:
材料科学
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能源科学
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仿生学
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DOI
PubMed
高影响因子
Chemical Science
·
2023
·Vol. 15
·期 3
·896-905
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IF 8.4
Xiaodong Wang,Huijuan Zhang,Chuanzhen Feng,Yu Wang
Efficient carrier separation is important for improving photoelectrochemical water splitting. Here, the morphology modification and band structure engineering of Ta3N5 are accomplished by doping it with Cu and Zr using a two-step method for the first time. The initially interstitially-doped Cu atoms act as anchors to interact with subsequently doped Zr atoms under the influence of differences in electronegativity. This interaction results in Cu,Zrg–Ta3N5 having a dense morphology and higher crystallinity, which helps to reduce carrier recombination at grain boundaries. Furthermore, the gradient doping of Zr generates a band edge energy gradient, which significantly enhances bulk charge separation efficiency. Therefore, a photoanode based on Cu,Zrg–Ta3N5 delivers an onset potential of 0.38 VRHE and a photocurrent density of 8.9 mA cm−2 at 1.23 VRHE. Among all the Ta3N5-based photoanodes deposited on FTO, a Cu,Zrg–Ta3N5-based photoanode has the lowest onset potential and highest photocurrent. The novel material morphology regulation and band edge position engineering strategies described herein provide new ideas for the preparation of other semiconductor nanoparticles to improve the photoelectrochemical water splitting performance.
研究领域:
材料科学
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能源科学
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DOI
高影响因子
Journal of Materials Chemistry A
·
2018
·Vol. 6
·期 23
·10761-10768
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IF 9.931
Yidan Liu,Yi Jiang,Fei Li,Fengshou Yu,Wenchao Jiang,Lixin Xia
Photoelectrochemical (PEC) water splitting is a promising method for the conversion and storage of solar energy. A combination of catalysts with photoelectrodes is generally required for the development of active photoanodes in PEC devices. In this work, we present two BiVO4 photoanodes modified with cobalt salophen (Co(salophen)) complexes for PEC water oxidation. The resulting photoanodes show significantly enhanced PEC performance. Under simulated sunlight illumination (AM 1.5G, 100 mW cm−2), high photocurrents of 3.89 mA cm−2 and 4.27 mA cm−2 were obtained for Co1/BiVO4 and Co2/BiVO4, respectively at 1.23 V (vs. the reversible hydrogen electrode (RHE)) in a neutral solution, an almost three-fold enhancement over that of the unmodified BiVO4. Intensity-modulated photocurrent spectroscopy (IMPS) analysis shows that the Co(salophen) complexes not only accelerate the water oxidation reaction but also reduce the surface recombination. The half-cell solar energy conversion efficiencies for Co1/BiVO4 and Co2/BiVO4 were 1.09% and 1.18% at 0.7 V, respectively. Due to their hydrophobic nature, the Co(salophen) complexes can bind strongly to the surface of BiVO4. When the Co2 complex featuring four hydrophobic tert-butyl groups in a salophen ligand was anchored to BiVO4, an extremely stable photocurrent of more than 3.5 mA cm−2 at 1.23 V vs. RHE is sustained for at least 3 h without decay. Such a stable and robust photoanode based on a molecular WOC surpasses those attained by most of the state-of-the-art heterogeneous catalysts.
研究领域:
材料科学
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能源转换
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催化化学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2018
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IF 6.735
Shang Xu,Dingfa Fu,Kai Song,Lin Wang,Zuobao Yang,Weiyou Yang,Huilin Hou
In the present work, we reported the exploration of WO 3 /BiVO 4 heterojunction photoanodes, which were consisted of one-dimensional WO 3 nanofiber (1D-WO 3 ) cores and BiVO 4 film shells. The 1D-WO 3 nanofibers were prepared by electrospinning, and the BiVO 4 outlayers were subsequently deposited around the surface of 1D-WO 3 fibers via a solution immersion process, leading to the construction of 1D-WO 3 /BiVO 4 heterojunctions. They had a maximum photocurrent density of 2.8 mA cm −2 at 1.23 V vs. RHE under AM 1.5 simulated solar light illumination, which was ∼20 times to that of pure 1D-WO 3 counterparts ( i.e. , 0.15 mA cm −2 ), and comparable to the best one of photoanodes based on WO 3 /BiVO 4 hybrids ever reported. Furthermore, the onset potential of FTO/1D-WO 3 /BiVO 4 photoanode was subsequently reduced, and the maximum incident photon-to-current efficiency ( IPCE ) was enhanced for ∼4 times in comparison to that of 1D-WO 3 counterparts. The mechanism for the enhanced PEC behaviors of WO 3 /BiVO 4 heterojunction photoanodes was proposed.
研究领域:
材料科学
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能源科学
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2023
·
IF 9.9
Dong Wang,Qian Fu,Jiayi Tian,Hongmiao Zhou,Rui Liu,Difu Zhan,Zhuo Peng,Changcun Han
Zinc oxide (ZnO) has a broad range of applications in piezo-photoelectrochemical water splitting. However, the narrow light absorption range and high photogenerated carrier recombination efficiency make ZnO somewhat limited in applying piezo-photoelectrochemical water splitting. Heterogeneous structure construction is a superior handle to these two drawbacks. Herein, few-layer molybdenum disulfide (MoS 2 ) nanospheres are compounded on ZnO nanosheets (NSs) to form a dual-piezoelectric-material heterojunction of ZnO NSs/MoS 2 . The photocurrent density of ZnO NSs/MoS 2 reaches 0.68 mA/cm 2 at 1.23 V vs. RHE under ultrasonic vibrations. It is 2.4 times higher than that of ZnO NSs under ultrasonic vibrations. The efficient piezo-photoelectrochemical performance is attributed to increased absorption range and polarization field. On the one hand, the narrow band gap of the few-layer MoS 2 widens the light absorption range of ZnO. On the other hand, compared to pure ZnO NSs, ZnO NSs/MoS 2 has an enhanced polarization field under ultrasonic vibrations due to the piezoelectric properties of dual piezoelectric materials, which dramatically accelerates the electron transfer and suppresses the recombination of between electrons and holes. This work provides a new approach to constructing photoelectrodes with effective piezoelectric photocatalytic properties.
研究领域:
材料科学
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能源科学
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产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2014
·Vol. 2
·期 33
·13705-13712
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IF 0
Zewen Fu,Tengfei Jiang,Lijing Zhang,Bingkun Liu,Dejun Wang,Lingling Wang,Tengfeng Xie
In this paper, we present the fabrication of Ti-doped α-Fe2O3 and surface treatment with Al3+ for application as a photoanode in photoelectrochemical water splitting. The Ti-doped α-Fe2O3 with Al3+ treatment shows a 100 mV cathodic shift of the onset potential and a notable improvement of the photocurrent density. The samples were characterized by SEM, TEM, HRTEM, XRD, Raman, UV-vis and XPS to obtain the information after surface treatment. Based on electrochemistry and photoelectrochemistry techniques, it appears that surface treatment with Al3+ passivates the surface states and decreases the accumulation of charge at the surface of Ti–Fe2O3. The results show that Ti-doped Fe2O3 with Al3+ surface treatment can be used as an efficient photoanode for photoelectrochemical water splitting.
研究领域:
材料科学
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能源科学
✓ 已验证
DOI
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Xiangrong Li,Shaohua Xie,Dongman Hou,Wenliang Wang,Guoqiang Li
Indium nitride (InN) exhibited significant potential as a photoelectrode material for photoelectrochemical (PEC) water splitting, attributed to its superior light absorption, high electron mobility, and direct bandgap. However, its practical application was constrained by rapid carrier recombination occurring within the bulk and at the surface. To address these limitations, researchers developed InN/UiO-66 heterojunction photoelectrodes, which markedly enhanced PEC water splitting for hydrogen production. Functionalization of the UiO-66 metal–organic framework (MOF) with hydroxyl (–OH) groups optimized the bandgap and improved light absorption, facilitating efficient charge separation and transfer processes. The functionalization also mitigated surface defect states in the InN nanorods (NRs), which were a major source of photogenerated carrier recombination, thereby enhancing overall photocatalytic activity. Compared to pristine InN NRs, the optimized InN/UiO-66-(OH) 2 electrode achieved a photocurrent density of −0.42 mA cm −2 and an applied bias photon-to-current efficiency (ABPE) of 0.47 % at −0.5 V vs. reversible hydrogen electrode (RHE). Furthermore, the InN/Ag/UiO-66-(OH) 2 system demonstrated a hydrogen production rate of 1.82 μmol min −1 under AM 1.5G illumination, with excellent long-term stability. This study provided critical insights into the design of efficient and durable PEC photoelectrodes, achieved the highest hydrogen yield reported for indium-based photocathodes to date, and underscored the promise of InN-based materials for solar-driven hydrogen production in the context of clean energy applications.
研究领域:
材料科学
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能源科学
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产品关联
DOI
PubMed
高影响因子
CHEMICAL PHYSICS LETTERS
·
2020
·
IF 2.029
Zijun Sun,Guisong Fang,Jinglin Li,Jiahuan Mo,Xiong He,Xu Wang,Zhiqiang Yu
Hematite (α-Fe 2 O 3 ) is one of the promising photoanode materials for photoelectrochemical (PEC) water splitting, but its poor bulk charge transfer has been challenging towards its practical application. Herein, we have synthesized the (Ti, Zr) co-doped hematite by a facile hydrothermal method. The cooperation of (Ti, Zr) co-doped hematite yields photocurrent density of 1.51 mA cm −2 at 1.23 V vs. RHE and IPCE of 17.3% at 400 nm. The structural and PEC analysis indicate that the considerably PEC performance improvement is contributed to the higher carrier density and enhanced charge transfer of the synergistic effect of Ti and Zr co-doping.
研究领域:
材料科学
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能源科学
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2019
·
IF 6.361
Houde She,Man Jiang,Pengfei Yue,Jingwei Huang,Lei Wang,Jianzhang Li,Gangqiang Zhu,Qizhao Wang
The performance of BiVO 4 for photoelectrocatalytic (PEC) water decomposition is commonly limited by reaction kinetics. In this work, NiS and CoS nanospheres were respectively loaded on BiVO 4 thin films (NiS/BiVO 4 and CoS/BiVO 4 composites) to improve its reaction kinetics for PEC water decomposition. Both physical and chemical properties of these composites were characterized by XRD , SEM, TEM, PL and UV-DRS. The photoelectric properties of the samples were verified by testing LSV , i-t, EIS and IPCE. The formation of the composites can effectively prevent the recombination of carriers and consequently accelerate the separation of electrons and holes. NiS/BiVO 4 and CoS/BiVO 4 can reach photocurrent of 2.1 mA cm −2 and 2.7 mA cm −2 under light respectively, at 1.23 V vs. RHE, which are 1.75 times and 2.25 times that of BiVO 4 (1.2 mA cm −2 ). The hydrogen production of the NiS/BiVO 4 and CoS/BiVO 4 photoanodes was 4.7 and 7.3 times higher than that of BiVO 4 photoanode, respectively.
研究领域:
材料科学
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能源科学
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产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Yidan Wang,Wei Tian,Liang Chen,Fengren Cao,Jun Guo,Liang Li
The rational design of semiconductor photoanodes with sufficient light absorption, efficient photogenerated carrier separation, and fast charge transport is crucial for photoelectrochemical (PEC) water splitting. Incorporating a small-band-gap semiconductor to a large-band-gap material with matched energy band position is a promising route to improve the light harvesting and charge transport. Herein, we report the fabrication of a three-dimensional heterojunction with uniform Bi2S3 nanorods on WO3 nanoplates by hydrothermal process and chemical bath deposition. The seed layer strategy was used to assist the growth of Bi2S3 nanorods for perfect interface contact between WO3 and Bi2S3. The as-prepared WO3/Bi2S3 composite exhibited a much enhanced photocurrent (5.95 mA/cm2 at 0.9 V vs reversible hydrogen electrode), which is 35 and 1.4 times higher than those of pristine WO3 and WO3/Bi2S3 composite without a seed layer, respectively. In addition, higher incident photon-to-current conversion efficiency (68.8%) and photoconversion efficiency (1.70%) were achieved. The enhancement mechanism was investigated in detail, and the sufficient light absorption, efficient charge transport, and high carrier density simultaneously contribute to the improved PEC activity. These findings will open up new opportunities to develop other highly efficient heterostructures as photoelectrodes for PEC applications.
研究领域:
材料科学
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能源科学
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纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Surfaces and Interfaces
·
2021
·
IF 4.837
Xiaowei Shi,Chao Dai,Xin Wang,Ping Yang,Lingxia Zheng,Zhefei Zhao,Huajun Zheng
Constructing hetero-junction on TiO 2 is an effective way to overcome the fast charge recombination and slow charge transfer kinetics, but how to design the junction is still a significant challenge in photo-electrochemical (PEC) water splitting. In this study, a considerable improvement in PEC performance for TiO 2 nanotubes was achieved following the introduction of a ternary hetero-junction through depositing ZnIn 2 S 4 (ZIS) and Zn 0.6 Ca 0.4 In 2 S 4 (ZCIS) in sequence via a facile hydrothermal method (TiO 2 /ZIS/ZCIS). The optimized photo-anode exhibited a photocurrent density of 1.07 mA cm −2 at 1.23 V vs. reversible hydrogen electrode (RHE), to be 3.96 and 1.25 times enhanced compared to that of TiO 2 and TiO 2 /ZIS, respectively. Meanwhile, the incident photon-to-current conversion efficiency (IPCE) and applied bias photon-to-current efficiency (ABPE) of TiO 2 /ZIS/ZCIS were also increased in contrast with its counterparts. The merits of appropriate band alignment of TiO 2 , ZIS, and ZCIS and fewer interface defects built an internal electric field among the ternary hetero-junction, leading to an enhanced conductivity and efficient interface charge separation. These results were supported by a series of photo-electrochemical measurements. Among others, the shortened average lifetime of photo-generated electron-hole pairs from 1.51 (TiO 2 ) to 1.17 ns (TiO 2 /ZIS/ZCIS) according to time-resolved photoluminescence reveals that the charge carriers generated in TiO 2 would have an additional decay pathway in the hetero-structure, which benefits for the charge separation. Our strategy could be extended to many low-efficiency semiconductors for the design and synthesis of effective photo-anodes in PEC water splitting.
研究领域:
材料科学
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能源科学
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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）