Solar RRL
·
2021
·Vol. 5
·期 9
·2100494
·
IF 8.582
Juntian Zhou,Ru Zhou,Jun Zhu,Ping Jiang,Lei Wan,Haihong Niu,Linhua Hu,Xi Yang,Jinzhang Xu,Baomin Xu
The cadmium sulfide (CdS) is a promising electron transport layer (ETL) material for perovskite solar cells (PSCs) due to its low photocatalytic activity toward perovskite materials under UV light. The critical problem responsible for the moderate performance of CdS-based PSCs is the parasitic light absorption of CdS, which drives researchers to deposit ultrathin ETLs. However, the ultrathin ETL often involves the undesirable shunt current leakage because of the direct contact between conducting substrate and perovskite layer. Herein, a fully low-temperature solution-processed colloidal SnO 2 -assisted CdS (S-CdS) ETL for planar CH 3 NH 3 PbI 3 PSCs is constructed. The detailed characterizations of morphological, optical, and energy levels confirm that the assistance of colloidal SnO 2 provides the ameliorated continuity, reduces surface roughness and superior wettability of ETLs for high-quality perovskite formation as well as the favorable cascade band structure for efficient charge transfer. The study of charge transfer mechanisms reveals that the S-CdS ETL effectively inhibits the shunt leakage, promotes the electron extraction and suppresses the charge recombination at the ETL/perovskite interface. Consequently, the S-CdS ETL-based PSCs deliver an appreciable efficiency of 16.26%, doubling that of conventional CdS-based devices. To the best of our knowledge, this value is the champion efficiency reported for CdS-based CH 3 NH 3 PbI 3 PSCs.
研究领域:
材料科学
·
能源科学
·
光电转换
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Ji Li,Ming Yang,Jiangbin Guo,Xianfa Zhang,Yingming Xu,Xiaoli Cheng,Lihua Huo
NO 2 is a dangerous gaseous pollutant, which is also a precursor to the formation of photochemical smog and ozone. It has negative impacts on the environment and human beings at local, regional and even the whole global scale. In this context, it is imperative to develop the efficient sensing materials for detecting NO 2 gas. In this study, a near room temperature NO 2 sensing material (In 2 O 3 /SnO 2 heterostructure) with “4S” index (selectivity, sensitivity, speed, stability) was constructed, it overcomes the drawbacks of traditional detection techniques and solves the unavoidable problems of metal oxide semiconductors in the sensing process (high temperature, cross response, weak response at low concentration, etc.). Meanwhile, the synergy between the surface structure and heterostructure interface of In 2 O 3 /SnO 2 has been thoroughly analyzed. More importantly, this study also sampled and monitored ambient air samples from different geographical locations and different time points in cities, which provides strong support for promoting the application of MOS sensors in real environment.
研究领域:
材料科学
·
环境科学
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED ENGINEERING MATERIALS
·
2021
·Vol. 23
·期 10
·2100064
·
IF 3.862
Keyu Gong,Yiman Ma,Tao Zhang,Lei Yan,Yang Miao,Feng Gao
Using absorbent cotton fiber as raw material, the porous biomass carbon (PC) structure is obtained by the Mg 2+ template method. Then, SnO 2 particles are loaded on the surface and internal pores by microwave treatment to obtain a composite material as anode material for lithium ion batteries, which releases a stable capacity of 508 mAh g −1 after 300 cycles at a current density of 300 mA g −1 . The PC structure not only offers a large specific surface area and active sites, but also buffers the expansion and agglomeration of the SnO 2 particles during the deintercalation of lithium ions.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Qiang Jia,Yue Ma,Yinxian Peng,Yanhong Liu,Wenli Zhang
Molecular imprinted hollow SnO 2 microspheres (Ho-SnO 2 @MIPs) integrated with boronate affinity ability were fabricated via atom transfer radical polymerization, and then they were adopted as ideal adsorbents for cis -diol containing luteolin (LTL) recognition and separation. Ho-SnO 2 @MIPs possessed uniform size (200 nm), porous and hollow structure, appropriate BET surface area (118.6 m 2 g −1 ), and high-density boronate affinity sites (0.22 mg m −2 ), endowing them highly specific uptake and fast separation properties. Due to the merit of pH responsive boronate affinity, the reversible interaction of boronic acid groups and LTL was regulated by the pH value facilely, which was benefit for the controlled recognition and release. In the batch mode experiments, the quick binding equilibrium (within 60 min) and a rather high specific binding capacity (46.81 mg g −1 ) at 298 K were observed, and Ho-SnO 2 @MIPs also displayed high rebinding selectivity to LTL. By a purification process, a commercially available LTL with 85% purity could be easily extracted and concentrated to 95.28% purity by Ho-SnO 2 @MIPs, and the purified products possessed the similar antibacterial performance with standard substance.
研究领域:
材料科学
·
生物化学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2021
·
IF 6.901
Wenyuan Zhang,Xinyu Zheng,Yuanchao Li,Lang He,Xin Li
In spite of great advances in low-cost fabrication of air-processed perovskite solar cells (PSCs), there are still many opportunities to further improve device performance. Herein, we show that, by introducing monosodium glutamate (MSG) with carboxyl group, amino group, and Na + cationic, known as gourmet powder, it is likely to simultaneously enhance the quality of perovskite film and electron transport layer, and interfacial charge extraction. As a multifunctional modify agent, the electric dipole effect and strong crosslinking of MSG can effectively reduce defects, accelerate interfacial charge transfer, alleviate hysteresis, and greatly improve performance of air-processed PSCs. Due to these unique characteristics of MSG, the champion power conversion efficiency (PCE) of 17.71% with negligible hysteresis has been achieved based on the structure of FTO/MSG-SnO 2 /FA 0.5 MA 0.5 PbI 3 /Spiro-OMeTAD/Au. Moreover, the unencapsulated device exhibits remarkable long-term stability, preserving over 91% of its initial PCE after storage in air for 1320 h. Our work provides a green and promising functionalization method for high-performance air-processed PSCs.
研究领域:
材料科学
·
太阳能
·
纳米技术
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Yongheng Du,Yanfeng Zhang,Ling Li,Ning Wang,Yujun Chai
The combination of Sb 2 O 3 or SnO 2 with graphene has become a research hotpot in recent years. However, several problems, namely the loading of the active materials, space utilization in composites, and the intrinsic volume expansion of Sb 2 O 3 and SnO 2 , have yet to be fully resolved. To overcome these disadvantages, in this work Sb 2 O 3 /carbon nanotubes (CNTs)/SnO 2 composite have been synthesized, in which the CNTs act as a network to ensure the electronic conductivity and buffer of the volume expansion. The SnO 2 nanoparticles are aligned by the CNTs and Sb 2 O 3 is dispersed in the voids between them. Space utilization and the loading of the oxides are thereby maximized. Moreover, the resultant composite retains small amount of water or alcohol, which does not affect the cyclic stability, but may have increased the ionic and electronic conductivity, improving the electrochemical performance. A discharge capacity of 910 mAh g −1 after 250 cycles at 100 mA g −1 is realized for Sb 2 O 3 /CNT/SnO 2 . Moreover, the contribution of the pseudocapacitance to the rate discharge capability is obvious, which arises from the different heterointerfaces between Sb 2 O 3 /CNTs, CNTs/SnO 2 or Sb 2 O 3 /SnO 2 . The homogenous distribution of Sn and Sb in CNTs after cycling leads to a lower discharge voltage, improving the application prospects. Although some collapse and cracks are detected, the CNTs network connects the oxides, ensuring the structural stability and the cyclic stability of Sb 2 O 3 /CNT/SnO 2 . This strategy represents a new concept for the design of multi-component materials for lithium storage.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2015
·Vol. 119
·期 4
·1483-1490
·
IF 1.704
Wang Xiaoxia,Yu Jianhua,Dong Hongzhou,Yu Mingxun,Zhang Baoqin,Wang Wen,Dong Lifeng
In this work, metal oxide (MnO 2 , SnO 2 and Co 3 O 4 )–graphene composite materials were successfully prepared via different synthesis methods. Uniform metal oxide nanoparticles were well dispersed on graphene sheets, and transmission electron microscopy characterizations showed that the average sizes of MnO 2 , SnO 2 , and Co 3 O 4 particles were about 60, 5, and 10 nm, respectively. Reflection losses of graphene composites and pure graphene were systematically evaluated between 2 and 18 GHz, which revealed that all composites exhibited enhanced microwave absorption properties compared to pure graphene. The minimum reflection losses of MnO 2 -graphene, SnO 2 –graphene, and Co 3 O 4 –graphene composites with a thickness of 2.0 mm were −20.9, −15.28, and −7.3 dB at the frequency of 14.8, 15.94, and 9.6 GHz, respectively, whereas −4.5 dB for pure graphene. The enhanced absorption ability probably originated from the combined advantage of metal oxide particles and graphene, which proved beneficial to improve the impedance matching of permittivity and permeability. Besides, the intrinsic characteristics of MnO 2 , SnO 2 , and Co 3 O 4 nanoparticles, the interface between nanostructured metal oxides and graphene sheets, and the multi-dielectric relaxation processes are all influence factors to improve the properties of microwave absorption.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2017
·
IF 3.133
Huimin Zhou,Muhammad Awais Naeem,Pengfei Lv,Jin Zhang,Zengyuan Pang,Lei Luo,Yibing Cai,Xin Xia,Qufu Wei
Carbon-coated SnO 2 composite nanofibers has been considered as an efficient way to alleviate the enormous volume change problem of tin-based anodes for lithium ion batteries (LIBs). Herein, porous carbon/SnO 2 nanofibers were prepared via single-needle electrospinning which was followed by carbonization treatment. The procedure involved two categories of precursors of SnO 2, stannic chloride pentahydrate and stannic acetate, whereas former was fully dissolved while later was partially dissolved in solvent, leading to different pore distribution in cooperating with thermal decomposition of polymethyl methacrylate. The pores generated from stannic chloride pentahydrate/polymethyl methacrylate system were randomly distributed on the surface of nanofibers. In the case of stannic acetate/polymethyl methacrylate derived composites, the thermolysis of polymer left multichannels within the nanofibers coupled with SnO 2 nanoparticles . Galvanostatic charge/discharge was carried out to evaluate them as anode materials for LIBs. It was found that multichannel carbon/SnO 2 nanofibers with large specific surface area (34.97 m 2 /g) achieved better rate capability and stable capacity retention of 89.9% after 50 cycles. The longitudinally aligned pores facilitated lithium diffusion and transference, which avoided nonuniform deposition and separation of lithium ions , thereby further enhancing the stability during the discharge/charge process.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE CHINESE CHEMICAL SOCIETY
·
2023
·Vol. 70
·期 9
·1784-1795
·
IF 1.8
Hong-jian Zhao,Yan Zhou,Ren-Jang Wu,Zhe Yu,Zhi-qiang Wu,Xu Li,Zheng-bing Han
Objective A highly active and stable composite photocatalyst which can be used in practical environmental remediation was developed. Methods g-C 3 N 4 /SnO 2 /BiPO 4 ternary composites (CN/SO/BPO) were synthesised via simple impregnation, and their texture structure, morphology, and surface composition were deeply characterized. Results In just 25 min under visible-light radiation, CN/SO/BPO almost eliminated rhodamine B, and the observed rate constant for the reaction was almost 36 and 3 times higher in comparison to that of CN/BPO and SO/BPO, respectively. Conclusions On the basis of experimental outcomes and DFT calculation, the direct Z-type structure of CN/SO/BPO lead to the improved photogenerated charge separation efficiency, as confirmed by surface photovoltage spectroscopy, electrochemical impedance spectroscopy, and transient photocurrent responses.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Wan-Jing Yu,Bochuan Deng,Tianhui An,Jing Wang,Yong Ji,Haiyan Cai,Hua Zhang,Hui Tong
Tin-based materials have been widely concerned as a competitor among various anode materials for lithium-ion battery (LIBs), due to their high theoretical capacities and relatively low lithiation potential. However, intrinsic drawbacks of poor electrical conductivity and severe volume expansion have hindered practical application of tin-based anode materials. Herein, we design and construct a novel multiphase-structure of SnSe 2 -SnO 2 confined in graphene nanoribbons (SnSe 2 -SnO 2 @GNRs) as anode materials for LIBs. The composite can deliver a specific discharge capacity of 998.0 mA h g −1 at a rate of 0.1 A g −1 . When the current density is increased to 5.0 A g −1 , the specific capacity is still maintained to be 416.0 mA h g −1 . The excellent electrochemical performance can be ascribed to the flexible and interlaced GNRs network in nanocomposite, which can not only improve the electrical conductivity of SnSe 2 -SnO 2 and alleviate its drastic volume change upon lithiation and delithiation, but also bring in abundant surface defects, which is conducive to electrochemical pseudo-capacitance energy storage. Meanwhile, the SnSe 2 -SnO 2 heterostructures can further enhance the electrochemical reaction kinetics of the anode materials and promote the anchoring of Li atoms at the interface. This opens a new pathway to synthesize Tin-based nano-structure as superior anode materials for high-performance LIBs.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Yaxue Luan,Guangdi Nie,Xinwei Zhao,Nan Qiao,Xiaochen Liu,Hao Wang,Xinni Zhang,Youqiang Chen,Yun-Ze Long
With the rapid development of lightweight, portable, and even wearable electronics, there is an increasing demand for flexible supercapacitors with excellent electrochemical performance. Here, we present the design and preparation of a novel architecture with SnO 2 dots uniformly confined on the activated porous carbon nanofibers (CNFs) using copper and its oxides as the hard templates for generating holes. Not only does the single electrode itself with a certain loading mass of SnO 2 show larger specific capacitance, better rate capability, and higher conductivity than the bare CNFs and activated CNFs/SnO 2 electrodes, but the assembled quasi-solid-state symmetric supercapacitor also exhibits good flexibility as well as superior electrochemical property with satisfactory energy density and favorable cycling stability, which indicates the great potential for practical applications. This work may provide a versatile and low-cost strategy to construct carbon/metal oxide nanostructures with robust binding force at the interface for adhesive-free supercapacitors.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2020
·Vol. 55
·期 34
·16083-16095
·
IF 3.553
Zhu Silun,Shi Shuying,Xie Yongshuai,Xu Chonghe,Zhang Xiaoqian,Peng Ying,Wang Xinqiang,Yu Gang,Zhu Luyi,Zhang Guanghui,Xu Dong
Abstract In this paper, SnO 2 fibers with three-dimensional (3D) interconnected structure were successfully obtained by a simple electrospinning technique with both high quality and reproducibility. The microstructure, physicochemical properties were characterized (FT-IR, XRD, SEM, HR-TEM, TG-DSC, N 2 -BET, XPS, H 2 -TPR, O 2 -TPD) extensively. The catalytic activity was tested in temperature-programmed oxidation (TPO) of model soot. The influence of the heat-treated temperature on the catalysts physicochemical properties and reactivity was evaluated. The fibers were fluffy and self-supporting after heat-treated which could provide a beneficial environment favored by soot catalytic combustion. SnO 2 fibers exhibited good thermal stability in phase structures and morphologies at least 900 °C. The SnF-500 exhibited the highest catalytic activity with T 10 , T 50 and T 90 at 410 °C, 450 °C and 474 °C. With the increase in the sintering temperature, the crystallinity of SnO 2 fiber increases and the Sn–O-Sn bond strengthens, resulting in a decrease in the catalytic activity of the catalyst as the BET surface area and surface oxygen decrease. Our studies provide insights into SnO 2 fibers for soot catalytic. Graphic abstract
研究领域:
材料科学
·
环境催化
·
纳米技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）