Sustainable Energy & Fuels
·
2020
·Vol. 4
·期 8
·3943-3950
·
IF 5.503
Hongpeng Zhou,Menglei Feng,Peiyuan Li,Xiangnan Gong,Dingke Zhang,Shijian Chen
Layered Sb2Se3 consists of infinite chains of repeating Sb4Se6 units stacked along the c-axis via Sb–Se covalent bonds, whereas they are linked by van der Waals force along the a-axis and b-axis. It usually tends to grow along the [hk0] orientation with low surface energy. However, [001]-oriented growth, which efficiently enhances charge transport, is often considered unstable due to its high surface energy. Herein, we propose a growth method to fabricate Sb2Se3 thin films with the preferential [001]-orientation on various substrates (Mo, MoSe2, SLG, NiO, SiO2 and FTO). This crystal facet design of preferentially [001]-oriented Sb2Se3 exposes the majority of the nanoribbons vertically aligned to the substrate, and thus maximally improves the charge transport, which may find applications in diverse optoelectronic devices. We confirmed their performance in photoelectrochemical water reduction. The preferentially [001]-oriented Sb2Se3 photocathode exhibited an impressive photocurrent density of −20.5 mA cm−2 at 0 V vs. RHE and a maximum photocurrent density of −28 mA cm−2 at −0.2 V vs. RHE under 1 sun AM 1.5 G illumination. Thus, the successful use of this [001]-Sb2Se3 photocathode paves the way for the development of high-efficiency Sb2Se3-based devices for optoelectronic applications.
研究领域:
材料科学
·
半导体物理
·
光电化学
·
纳米材料
·
能源材料
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2018
·Vol. 29
·期 23
·19614-19619
·
IF 2.324
Hu Yiwei,Chen Xinhang,Ren Xiaohui,Huang Zongyu,Qi Xiang,Zhong Jianxin
Tin disulfide (SnS 2 ) has been attracted intensive attention in the field of photoelectric conversion due to its appropriate band gap and glorious electronic mobility. The hexagon SnS 2 nanosheets has been successfully integrated through a facile one-pot hydrothermal method. SEM images, Raman spectra, atomic force microscope and X-ray diffraction patterns are measured to carry out to investigate the morphologies and microstructures of SnS 2 nanosheetsm, confirming a good crystallized SnS 2 . Then, the photochemical activity of as-prepared SnS 2 nanosheets were tested in the electrolyte of Na 2 SO 4 . Photoelectrochemical tests demonstrate that the photocurrent density of as-prepared hexagon SnS 2 nanosheets (1.66 µA/cm 2 at a light intensity of 140 mW/cm 2 ) is hugely increased with increasing light intensity. Furthermore, after 50 cycles, the photocurrent density does not change significantly, indicating that the as-prepared SnS 2 nanosheets possesses superior stabilities. The outstanding photocatalytic performances of SnS 2 nanosheets are not only resulted from its huge specific surface area, which can harvest more light and provide more active sites, but also attributed to its superior charge mobility, which can facilitate the separation photogenerated electron–hole pairs and the charge transfer between SnS 2 nanosheets and the electrode. The most important is that our work reveals the hexagonal SnS 2 nanosheets not only possess superior photoelectrochemical properties, but also have great potential applications in energy conversion and photodetector fields.
研究领域:
材料科学
·
光催化
·
能源转换
·
纳米材料
·
光电化学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2019
·
IF 3.45
Zhiwei Wang,Hongfeng Yin,Yun Tang,Qin Hou,Chen He,Hudie Yuan
Herein, we constructed an ordered nanoporous embedding nanoparticles composite by anodic oxidation of Ti 3 SiC 2 in fluorine containing organic electrolyte. Compared to anodized Ti which resulted in TiO 2 nanotubes , the anodized Ti 3 SiC 2 (ATSC) led to the formation of nanostructured TiO 2 /C/SiO 2 composite. The morphologies of oxides in the composite also varied with different anodization parameters. The ATSC could be directly used as an electrode without further processes, which possessed a superior structure and composition with a visible-light photocurrent density of 7.56 μA cm −2 , initial reversible area capacity of 6.18 F cm −2 , which were respectively 1.32 and 6.87 times higher than those of the anodized Ti (AT), respectively. The ATSC synthesized by such a feasible fabricating strategy shows favorable photoelectrochemical properties and remarkable stability, and may broaden the bifunctional material prospects of anodized MAX phases.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2016
·Vol. 4
·期 25
·9816-9821
·
IF 8.262
Li Cheng,Qing Chang,Yu Chang,Nannan Zhang,Changyuan Tao,Zhaona Wang,Xing Fan
Hierarchical forest-like photoelectrodes were prepared by assembling nano-ZnO on an array of micro-metal dendrites, aiming to demonstrate the idea of highly efficient photon-harvesting inside a biomimetic dendrite structure. Via a facile aqueous electrochemical deposition process, the metal dendrites were deposited on both flat and wire substrates with different alignments, showing wide adaptability. A strong, broadband anti-reflection effect was observed, owing to the diffuse reflection inside the microdendrites. By increasing the dendrite height, the overall reflectivity of the metal electrode can be reduced from 75% to 45%, which could be further reduced to 12% after combining with acicular-leaf-like ZnO nanoarrays. Its applications in light-driven water splitting were successfully demonstrated. Taking advantage of the forest-like photoelectrode, we have artificially constructed an efficient photo-electrochemical system similar to plants in a forest, with photons harvested by the crown-like photoanodes in the sunshine, and synthetic reactions driven by the root-like electrode in the shadow.
研究领域:
材料科学
·
纳米科技
·
光电化学
·
可再生能源
·
仿生学
✓ 已验证
DOI
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2013
·
IF 5.437
Yaqi Hu,Zhonghua Xue,Hongxia He,Ruixia Ai,Xiuhui Liu,Xiaoquan Lu
A novel light “on–off” photoelectrochemical sensing for the sensitive determination of hydroquinone was developed based on the porphyrin-functionalized Au nanoparticles on graphene (porphyrin/AuNPs/graphene). Gold nanoparticles (AuNPs) were firstly modified onto graphene sheets using NaBH 4 as reductant and the porphyrin/AuNPs/graphene nanocomposites were then synthesized by self-assembly decoration of sulfhydryl porphyrin on AuNPs modified graphene sheets by S–Au bond. The porphyrin/AuNPs/graphene nanocomposites were characterized by transmission electron microscopy , X-ray photoelectron , and ultraviolet–visible absorption spectroscopies . The nanocomposites showed good dispersion in water and on indium tin oxide (ITO) surface. The resulting porphyrin/AuNPs/graphene modified ITO electrode showed good photoelectrochemical behavior toward the oxidation of hydroquinone (HQ) at 0 V under white light illumination. The proposed photoelectrochemical method could detect hydroquinone with a wide linear response ranging from 20 to 240 nM ( R =0.9914). The detection limit was 4.6 nM for HQ ( S / N =3). Thus, the nanocomposites would be expected to be a novel photoactive material for photoelectrochemical biosensing.
研究领域:
分析化学
·
纳米生物技术
·
环境监测
·
电化学
·
生物传感器
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2019
·
IF 6.361
Qing Cen,Qiaoyuan Gao,Chenlu Zhang,Yingqi Liu,Qi Wang,Qi Wang
In this study, visible-light-active iron tungstosilicate (FeSiW) was fabricated via solvothermal method . Fe 3+ was applied as counter ion to precipitate with silicotungstic acid (H 4 SiW 12 O 40 ) in methanol solution. It can be observed from FT-IR spectra that the Keggin structure of SiW 12 O 40 4− was well maintained in FeSiW. Besides, the effect of different initial molar ratios of Fe 3+ to H 4 SiW 12 O 40 was investigated (from 4:1 to 4:4). By photoelectrochemical characterizations, such as photocurrent response and Mott-Schottky (M-S) plots, easiest generation of electron-hole pairs and lowest charge transfer resistance can be observed on FeSiW with initial molar ratio of 4:3. Moreover, FeSiW with 4:3 ratio also displayed highest activity for photocatalytic reduction of Cr(VI), despite of the largest band gap (ca. 2.71 eV). The lowest unoccupied molecular orbital (LUMO) and highest occupied molecular orbital (HOMO) of the optimized FeSiW were estimated to be +0.03 V and 2.74 V vs NHE, respectively, which were thermodynamically feasible for Cr(VI) reduction and H 2 O oxidation . Even under acidic condition (pH 3), the optimized photocatalyst displayed good stability in cyclic runs. Therefore, the present study opens a new way for heterogeneous polyoxometalates as efficient photocatalyst for environmental application.
研究领域:
环境化学
·
材料科学
·
光催化
·
无机化学
·
污染治理
✓ 已验证
DOI
高影响因子
RSC Advances
·
2019
·Vol. 9
·期 46
·26712-26717
·
IF 3.049
Yongzhao Su,Duotian Chen,Siyuan Yang,Shengsen Zhang,Yingju Liu,Yueping Fang,Qiao Zhang,Feng Peng
A photoelectrochemical (PEC) method based on the etching reaction of F ions on the surface of TiO2 nanorod arrays (TNRs) was proposed for the high sensitivity and selectivity detection of F ions. With the increase of F ion concentration, the surface etching reaction on TNR becomes more intense, resulting in the increased number of surface active sites, the reduction of electron transfer resistance, and the increase of photocurrent density. The prepared TNRs as a PEC probe exhibits a good linear relationship between photocurrent increment and the logarithm of F ion concentration in the range from 0.05 to 1000 nM with an ultra-trace detection limit of 0.03 nM for F ion detection.
研究领域:
分析化学
·
环境监测
·
纳米材料
·
电化学传感
·
生物医学工程
✓ 已验证
DOI
高影响因子
MATERIALS & DESIGN
·
2017
·
IF 4.364
Puhong Wen,Lili Ai,Fenyan Wei,Dengwei Hu,Jingjing Guo,Fangyi Yao,Taotao Liu
The crystalline hexagonal Nb 2 O 5 (H-Nb 2 O 5 ) nanobelt clusters dominantly exposed (− 110) facet are firstly synthesized by a hydrothermal topological reaction with a precursor of fiber-like K 2 Nb 2 O 6 ·H 2 O. The structure and morphology of samples obtained at different temperatures and times are investigated. There are two steps in the synthesis process. One is the acid-exchanging reaction transforming into amorphous phase protonated niobate (HNO), and the other is dehydration reaction transforming into H-Nb 2 O 5 , and simultaneous dissolution reaction which forms nanobelt cluster morphology from the fiber-like particle. The formation mechanism of H-Nb 2 O 5 nanobelt clusters has been proposed in detail. After photo-reduced reaction between the H-Nb 2 O 5 nanobelt clusters and AgNO 3 solution, the dominantly exposed (− 110) facet of H-Nb 2 O 5 nanobelt is homogeneously covered by Ag nanoparticles . The photo-electrochemical performance of the obtained H-Nb 2 O 5 nanobelt clusters and Ag deposited H-Nb 2 O 5 (Ag-Nb 2 O 5 ) nanobelt clusters as photocatalysts are evaluated by splitting water under simulated sunlight illumination, and the generated photocurrent of Ag-Nb 2 O 5 sample is 10.73 μA, which is 535 times that of the H-Nb 2 O 5 sample. The results demonstrate that the Ag-Nb 2 O 5 nanobelt clusters have a high photo-electrochemical performance as well as good sunlight photoelectric conversion efficiency.
研究领域:
材料科学
·
纳米科技
·
光催化
·
能源化学
·
半导体材料
·
电化学
·
太阳能转换
✓ 已验证
DOI
高影响因子
EES Catalysis
·
2023
·Vol. 1
·期 3
·312-321
·
IF 0
Yiqiao Wang,Siyuan Pan,Huan Li,Dewang Li,Yong Guo,Sijia Chi,Chuannan Geng,Shichao Wu,Quan-Hong Yang
Despite lithium–air batteries having unprecedented theoretical energy supremacy, rambling Li2O2 growth typically impedes O2 diffusion and electron transfer, causing low capacity, poor charging kinetics and short cycle life. Herein, we propose synergistic catalysis in the cathode by engineering the crystal facet of Fe2O3 nanoplates and introducing a visible light-excited photochemical effect. The growth of Li2O2 is regulated with a uniform distribution, mitigating local product aggregation and thus reducing the barriers of O2 diffusion and electron transfer. The improved reaction kinetics lead to ∼420% capacity improvement, low charge potential, superior rate performance, and long-term stability (300 cycles) in actual air. We reveal a mechanism that photoelectrons around each catalyst node and the resultant homogeneous internal electric field increase charge transfer, decrease soluble intermediates, and enable high electrochemical reversibility of amorphous Li2O2 with an ordered process. This study provides inspiring insights for future research into controlling product ordering in Li–air batteries.
研究领域:
电化学
·
纳米材料科学
·
能源化学
·
催化化学
·
电池技术
✓ 已验证
DOI
Physica Status Solidi-Rapid Research Letters
·
2023
·Vol. 18
·期 2
·2300183
·
IF 2.8
Lei Xu,Mengtong Yang,Qidong Lu,Yuxin Ren,Yi Chen,Jinjia Guo,Mingjie Cai,Xiao Miao,Feng Teng,Haibo Fan,Chunmei Zhang,Xuexia He,Peng Hu
Broadband photodetectors are essential for the integrated design of next-generation optical detector devices. Ternary 2D bismuth sulfide semiconductor (BiXI, X = S, Se, Te) is an ideal candidate for broadband photoelectric detection due to its narrow bandgap and excellent electrical transport performance. Here, BiSeI is grown by chemical vapor transport (CVT) method and used in photoelectrochemical (PEC) photodetection. The PEC-type photodetector based on BiSeI nanosheets has a broadband detection ranging from 350 to 900 nm, displaying a high responsivity of 2.88 mA W −1 , a high detectivity of 1.10 × 10 10 Jones and a fast response time of 7/16 ms at a bias voltage of 0.5 V. Furthermore, the device also exhibits a negligible current density loss after three months, which indicates that it has good stability against air and moisture. In addition, the photodetector can work without bias potential, indicating that it is a good self-powered device. The results demonstrate that BiSeI is a potential material in self-powered PEC photodetector.
研究领域:
材料科学
·
纳米科技
·
光电子学
·
半导体物理
·
电化学
✓ 已验证
DOI
高影响因子
Small
·
2024
·Vol. 20
·期 27
·2308590
·
IF 13
Xiang Xu,Ying Wang,Yeqin Ji,Zhijian Chen,Chunhui Lu,Xinlong Xu,Dengxin Hua
Flexible broadband photodetectors are desired but challenging to be fabricated for next-generation wearable intelligent optoelectronic devices. Considering the narrow bandgap and strong light absorption, molybdenum telluride (MoTe 2 ) based photoelectrochemical photodetectors are successfully assembled by liquid phase exfoliation accompanied with the electrophoretic deposited method. This MoTe 2 -based photodetector shows a broadband detection in ultraviolet–near-infrared band, long-term stability within 18000 s, and fast response in millisecond-level (response time≈19 ms, recovery time≈26 ms). More importantly, even though the MoTe 2 photodetector is bent and twisted at a high degree for several hundred times, it still shows excellent flexibility with stable on-off switching characteristics. Additionally, this photodetector displays a good response for rotation angles in the range from 0° to 360°, and the extracted I ph maintain almost the same value approximately 0.97 µA cm −2 , suggesting an omnidirectional detection capability. This work demonstrates the proposed flexible photoanode shows a great potential in future broadband omnidirectional detection systems.
研究领域:
纳米生物医学
·
光电子学
·
材料科学
·
生物传感器
·
可穿戴设备
·
分子诊断
✓ 已验证
DOI
高影响因子
Nano Select
·
2021
·Vol. 2
·期 11
·2135-2147
·
IF 0
Puhong Wen,Xiaowen Jiang,Qian He,Dengwei Hu,Lijun Ren,Weixing Zhao
The tetragonal phase Nb 2 O 5 (T-Nb 2 O 5 ) nanobelts with preferentially exposed the (010) facet have been successfully prepared for the first time by insitu topological reaction using the KNb 3 O 8 nanobelts as the precursor. Meanwhile, the transformation mechanism of the crystal structure and morphology from the layered KNb 3 O 8 nanobelt to the T-Nb 2 O 5 nanobelt was revealed in detail by using XRD, FE-SEM, TEM, HRTEM, SAED, UV-vis DRS, EDX, XPS, and Raman spectra. In addition, Ag deposited T-Nb 2 O 5 (Ag/T-Nb 2 O 5 ) nanobelts were prepared by photo-reduction reaction. The photoelectrochemical properties of the T-Nb 2 O 5 nanobelts and Ag/T-Nb 2 O 5 nanobelts as a photocatalyst were evaluated by splitting water under simulated sunlight. The results show that the photocurrent density generated by the prepared Ag/T-Nb 2 O 5 sample is 48.1 µA∙cm −2 , which is 2.3 times that of the T-Nb 2 O 5 sample, and the prepared tetragonal phase T-Nb 2 O 5 nanobelts produce a photocurrent value 1.5 times that of the contrast orthogonal phase O-Nb 2 O 5 nanosheets. It indicates that the (010) facet of the tetragonal phase Nb 2 O 5 is one of the highest photocatalytic active surfaces, and the visible light utilization efficiency of the T-Nb 2 O 5 nanobelt with Ag deposited on the surface has been significantly improved, which implies that it has potential applications in the field of photocatalysis.
研究领域:
材料科学
·
纳米科技
·
光催化
·
能源化学
·
半导体材料
·
表面科学
✓ 已验证
DOI
危险品化学品经营许可证（带存储）