APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Huishuang Jiang,Yang Qu,Xianfa Zhang,Rui Gao,Xiaoli Cheng,Shan Gao,Lihua Huo,Zolt́an Major,Yingming Xu
As a poisonous and harmful gas, NO 2 , is not only harmful to the environment, but also detrimental to human health. In this work, ionic liquids (1-hexadecyl-3-methylimidazolium chloride [C 16 Mim] Cl) were selected as dopants to prepare flower-like Cl uniform doped In 2 O 3 nanomaterials. The material exhibits excellent sensing performance to NO 2 under UV light because of Cl uniform doped. Compared with the experiment in dark conditions, the response value of the sensor to 5 ppm NO 2 under UV light is approximately two times higher (S = 425.9) and presents a faster recovery rate (69 s). Chlorine doping shifts the valence band of the material upwards, facilitating the photogenerated electron leap under UV illumination. Moreover, the in-situ DRIFT under UV light were employed to verify the interaction between the materials and NO 2 gas in N 2 , air and O 2 atmospheres respectively. It was found that the presence of oxygen in the environment affects the adsorption of NO 2 on the surface of the Cl doped In 2 O 3 material. This work is of great significance to the sensing mechanism investigation of photo-activated NO 2 gas sensors.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2024
·
IF 6.9
Shuoshuo Feng,Xufeng Rao,Xiaoyu Chen,Fanghua Ning,Min Wang,Yuyu Liu
The electrocatalytic reduction of nitrate offers an environmentally friendly means of eliminating hazardous nitrate from wastewater while simultaneously yielding ammonia, a vital fertilizer precursor. Given the importance of nitrate reduction for environmental remediation and the potential of electrochemical methods, the development of a highly efficient and selective electrocatalyst specifically for nitrate reduction to ammonia (NO 3 ER) is crucial. The Cl-doped Co 4 S 3 (Cl-Co 4 S 3 ) catalyst was successfully synthesized via a solvothermal method in methanol, aiming to enhance nitrate electroreduction. The incorporation of chlorine was found to modulate the local electronic environment around cobalt atoms, enhancing their reactivity and leading to exceptional catalytic performance for nitrate reduction, leading to exceptional catalytic performance. At an operating potential of −0.61 V vs. the reversible hydrogen electrode, Cl-Co 4 S 3 exhibited remarkable Faradaic efficiency (97.64 ± 2.03 %) and yield rate (0.652 ± 0.012 mmol h −1 cm −2 ) for ammonia production, surpassing the majority of reported electrocatalysts for NO 3 ER.
研究领域:
环境科学
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材料科学
·
电化学
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产品关联
DOI
高影响因子
ACS Materials Letters
·
2023
·
IF 11.4
Zhenyu Hu,Dan Zhao,Yuheng Li,Xin Lv,Jinhui Song,Lingyi Meng,Shui-yang Lien,Peng Gao
The demand for a sustainable power supply and management has become increasingly essential with the rise of Internet of Things (IoT) devices and the associated wireless sensor networks. Inorganic thermoelectric thin films, such as those based on Bi2S3, are becoming a viable solution to this issue as they are low-toxic, inexpensive, and possess a high Seebeck coefficient and low thermal conductivity. However, they usually suffer from an inherent low electrical conductivity. In this study, we tackled this problem by incorporating Cl into Bi2S3 lattices using a solution process, resulting in a substantial increase in both the conductivity and carrier concentration. Additionally, DFT calculations show that the doping of Cl leads to the formation of a degenerate semiconductor, which increases conductivity. Moreover, a high power factor of 121.88 μW m–1 K–2 was achieved after doping before plasma treatment. Specifically, the Bi2S3 sample doped with 0.5 mmol of BiCl3 with plasma treatment achieved a remarkable conductivity of 100.72 S cm–1, among the highest reported for a Bi2S3-based system, which is attributed to the sharp increase of carrier concentration. This research demonstrates a promising approach for overcoming the inherently low conductivity of Bi2S3-based thermoelectric thin films to enable them as a viable solution for low-cost power supply in IoT applications.
研究领域:
材料科学
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能源技术
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计算化学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Xinfu Chen,Jing Su,Yue Meng,Minda Yu,Mingxia Zheng,Yuanyuan Sun,Beidou Xi
Herein, we report an oxygen vacancies (OVs)-rich micro zero-valent iron (mZVI) interface for selective and efficient H 2 O 2 degradation by mechanical chloride (Cl) doping. With the contribution of OVs, electron transfer process was sped up due to the charge unbalance of mZVI, and abundant adsorbed ferrous was produced. The resultant Cl-ZVI BM /H 2 O 2 system increased the yield of •OH for threefold, without a significant increase in the subordinate reactive oxygen species , and the degradation rate for sulfamethazine was enhanced by 13 folds. The catalytic reactivity of as-prepared material was maintained for more than 230 days in dry air. The performance of as-prepared catalyst to practical water remediation was evaluated, and it demonstrated excellent results. The study shed light to improve the utilization efficiency of H 2 O 2 by an OVs-rich iron-based catalyst using a simple mechanochemistry method of doping halogen elements .
研究领域:
环境科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Lin-Chao Yang,Quan Zhou,Jin-Qiu Liu,Zhuo Wang,Yue-Chan Song,Wen-Wen Wu,Peng Liu
Extensive studies on TiO 2 -based colossal permittivity (CP, dielectric constant ε’ >10 3 ) materials have focused on the cation doping of metal elements; however, little attention has been paid to nonmetallic dopants. Compared to metallic elements, nonmetallic atoms with small radii and high activities, such as H, C, B, and N, can be used as anion-doping elements. Their incorporation into the TiO 2 lattice includes interstitial and substitutional doping, which can influence the bandgap of TiO 2 and its electron transport performance differently, thereby exhibiting considerable potential in TiO 2 -based applications. In this study, different N-containing compounds (BN and NH 4 Cl) were doped into rutile TiO 2 , while homogeneous ceramics of single-phase rutile TiO 2 were prepared via solid-state sintering. The effects of co-doping N, Cl, and N, B on the dielectric properties of rutile TiO 2 ceramics were investigated. While N and Cl doping showed no considerable effect on the dielectric properties of rutile TiO 2 ceramics, the co-doping of N and B doping in rutile TiO 2 considerably increased the dielectric constant to >10 4 with suppressed tan δ in a wide frequency range from 1 kHz to 10 MHz. These ceramics exhibited excellent frequency stability (up to 100 MHz) and temperature stability (153–513 K), which outperforms most reported transition metal co-doped TiO 2 ceramics, thereby highlighting the untapped potential of the non-metallic dopants in enhancing dielectric materials.
研究领域:
材料科学
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电子工程
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2018
·
IF 3.057
Shaohai Wu,Chengyan Liu,Zhengsen Wu,Lei Miao,Jie Gao,Xiaokai Hu,Junliang Chen,Yanyan Zheng,Xiuxia Wang,Chengjin Shen,Hengquan Yang,Xiaoyuan Zhou
SnSe 2 is regarded as an attractive thermoelectric material for its structural and chemical analogy to SnSe that is claimed with the highest ZT in single crystal. In this study, the pure and Cl-doped SnSe 2 polycrystals (3%, 6%, 9% and 12% molar Cl content) were fabricated in four steps that are hydrothermal synthesis , heating purification, diffusion doping, and spark plasma sintering . The phase structure, lamellar morphology and crystallite orientation were studied for the synthesized SnSe 2 powder and the sintered pellets. The structural evolution was traced from the SnSe 2 hexagonal plates of powders to the (001) oriented grains in pellets. The Cl doping into SnSe 2 was verified by phase composition, lattice parameter , element distribution, and chemical valance. The doped Cl increased both the carrier concentration and the mobility. The anisotropic thermoelectric properties of SnSe 2 bulk materials were investigated as functions of temperature from 50 °C to 300 °C and the doping amount, respectively. The Seebeck coefficient was less anisotropic than the electrical and thermal conduction . The grain orientation influenced the anisotropy of the electrical and thermal conductivity at a similar ratio. The power factors were less dependent on temperature with an optimum in-plane 1.06 mW m −1 K −2 and out-of-plane 0.41 mW m −1 K −2 . The highest ZT s of 0.3 were attained at 300 °C in both directions.
研究领域:
材料科学
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热电材料
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产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2016
·
IF 2.567
Fan Tian,Huiping Zhao,Zan Dai,Gang Cheng,Rong Chen
Cl-incorporated BiOI nanostructures with different Cl/I molar ratios have been successfully fabricated via a facile room-temperature method in H2O/EG mixture solvent. Combined with FT-IR, Raman spectrum, XRD Rietveld refinements, and DFT calculation, the incorporated Cl ions are found mainly occupied on I sites, resulting in a hybrid valence band consisting of I 5p, O 2p, and Cl 3p orbitals, which deepens the valence band location of the materials and induces photogenerated holes with higher oxidation power. The incorporated Cl ions into the lattice also change the evolution of photogenerated electrons and holes, inducing the broadening of the bandgap but efficient production of photogenerated carriers. The enhanced oxidation power of Cl-incorporated BiOI products was evaluated by photocatalysis degradation of methylene blue, an organic dye for which pure BiOI shows negligible direct oxidation efficiency. Ascribed to the relatively low valence band maximum (VBM) and efficient generation of photoinduced electrons and holes, the incorporated products show distinct enhancement photocatalytic activities.
研究领域:
材料科学
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环境科学
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化学
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产品关联
DOI
高影响因子
Catalysts
·
2020
·Vol. 10
·期 1
·69
·
IF 3.52
Zhen Cao,Tingting Zhang,Pin Ren,Ding Cao,Yanjun Lin,Liren Wang,Bing Zhang,Xu Xiang
We demonstrate that using neoprene as a binder during the fabrication of TiO2-coated fabrics enhances the rates of photodegradation of dyes by the fabrics. The neoprene binder simultaneously modifies the surface of the TiO2particles with Cl and dopes the TiO2with Cl, without requiring high temperatures or other harsh laboratory treatments. The adsorption of chlorine on the surface and doping of the lattice with chlorine were confirmed by X-ray photoelectron spectroscopy. The chloride ions adsorbed onto the TiO2surface introduces a negative surface charge that enhances electrostatic adsorption of cationic dyes, and greatly improves the self-sensitizing degradation performance of the dyes. Chloride ions replace lattice oxygen atoms in TiO2, inducing lattice oxygen vacancies, that reduce the apparent band gap of the TiO2particles, enhancing its absorption of visible light, and further increasing the photocatalytic activity of the composite-coated fabric. The degradation rates of RhB and MB over 50 min were 95.2% and 96.0%, respectively. The degradation rate for MO reached 95.4% after 180 min. We also show that •OH and •O2−are active agents in the dye-degradation mechanism. Moreover, the photocatalytic performance of the composite-coated fabric was unchanged after eight cycles of photocatalytic degradation of RhB, demonstrating that the photocatalyst-coated fabrics was highly recyclable.Keywords:TiO2-coated fabrics;self-sensitizing degradation;neoprene;chlorine doping;oxygen vacancies
研究领域:
材料科学
·
环境科学
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化学工程
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产品关联
DOI
高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2021
·Vol. 127
·期 7
·1-8
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IF 2.584
Zhang Junlin,Wang Yunfan,Zhou Biao,Cao Hongyuan,Yang Xiutao,Li Bing,Zhang Jingquan,Feng Lianghuan,Zeng Guanggen,Zhong Zhengxiang,Ghali Mohsen,Karazhanov Smagul
In this work, CdS thin films were deposited on glass/fluorine-doping tin oxide (FTO) substrates by low-cost chemical bath deposition (CBD), followed by annealing with CdCl 2 -doping (Cl-doping) to fabricate resistive-type photodetectors (PDs) with a vertical structure of glass/FTO/CBD-CdS:Cl/electrode. The effect of annealing with Cl-doping (AwCl) on the various properties of films and the photodetection performance of PDs were systematically characterized by special testing methods. The results revealed that the surface morphology and crystal structure of CBD-CdS:Cl films were improved, accompanied by an enhancement of hexagonal phase (002) crystal plane (wurtzite structure), and the optical bandgap of films can be adjusted between 2.43 and 2.26 eV while the electron activation energy of the films was reduced from 75.9 to 10.3 meV after AwCl. Furthermore, the light responsivity of CBD-CdS:Cl PDs were 0.57, 0.59 and 1.67 A/W under 365, 400 and 530 nm illumination at a bias of −2.0 V, respectively, and the detectivity of photons at corresponding wavelengths were 3.7 × 10 8 , 3.9 × 10 8 and 1.08 × 10 9 Jones. Meanwhile, the PDs showed optimized repeatability and improved sensitivity under periodic illumination. The above results demonstrated that the CBD-CdS:Cl PDs with a vertical structure developed in this work had good detection performance at certain characteristic wavelengths.
研究领域:
材料科学
·
光电技术
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产品关联
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2020
·Vol. 7
·期 16
·2969-2978
·
IF 5.958
Jie-hao Li,Jie Ren,Ying Liu,Hui-ying Mu,Rui-hong Liu,Jun Zhao,Lan-ju Chen,Fa-tang Li
In this paper, a novel ionic liquid-assisted solvothermal method to prepare Cl-doped bismuth oxycarbonate (Bi2O2CO3) is presented. The ionic liquid of [Hnmp]Cl not only enhances the solvothermal process to help the formation of Bi2O2CO3, but also provides chloride element as a dopant. XRD and XPS show that all three samples are Bi2O2CO3 with high purity. XPS, solid EPR, and TEM results prove that Cl is doped into the Bi2O2CO3 lattice and oxygen vacancies are generated. DRS results show that after Cl doping, the absorption of visible light by Bi2O2CO3 is enhanced. Surface photovoltage (SPV) and transient photocurrent tests show that as the doping amount of Cl increases, the separation efficiency of photogenerated electron–hole pairs over Bi2O2CO3 improves. The photocatalytic activity of Bi2O2CO3 is evaluated by the degradation of rhodamine B, which is increased after Cl doping. This work would broaden the application of ionic liquids in the solvothermal process and deepen the understanding of anionic ion doping in Bi2O2CO3.
研究领域:
材料科学
·
环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Applied Spectroscopy
·
2025
·
IF 1
Han Dan,Niu Xiaoxue,Wang Jing,Yan Zihong
Zr and Cl double-doped carbon dots (Zr/Cl-CDs) were prepared by a one-step hydrothermal method using citric acid, urea, and ZrCl 4 as precursors. Zr/Cl-CDs were characterized by ultra-violet-visible spectroscopy (UV-Vis), transmission electron microscopy, Fourier transform infrared spectroscopy, X-ray diffraction, and X-ray photoelectron spectroscopy (XPS). Experimental analysis revealed that the average size of Zr/Cl-CDs was 2–3 nm, while XPS analysis revealed the presence of C–Cl and Zr–O bonds. The fluorescence quantum yield of the final CDs was 17.5% at the excitation of 360 nm. In addition, Zr/Cl-CDs exhibited excellent performance in the detection of rutin with a concentration of 30–110 and 100–160 μmol/L, respectively. Linear correlation coefficients (R 2 ) were 0.9931 and 0.9962. The underlying mechanism was that rutin had an excellent quenching effect on the emission of the Zr/Cl-CDs as the fluorescence intensity exhibited a good linear relationship between rutin concentration and fluorescence intensity. These findings provide a new strategy for synthesizing double-doped CDs for rutin detection.
研究领域:
材料科学
·
分析化学
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DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Guang-Ming Bao,Shun-Qiang Cui,Yi-Fan Xia,Zhen-Chong Dou,Xia Wei,Zhi-Qiang Cai,Peiyao Chen,Yi Zhang,Yu-Xin Chen,Hou-Qun Yuan
Amphotericin B (AmB) is an antifungal drug used in dairy farming. It is significant to monitor AmB in milk and environmental water as AmB is severely toxic. Herein, dual emissive Cl, N-codoped carbon dots (Cl, N-CDs) were facilely synthesized and explored as fluorescent probes for specific recognition of AmB among sixty-eight common substances. The Cl, N-CDs possess long emission wavelengths (650 and 482 nm), large stokes shift (240 nm), and high quantum yield (22.06 %). The fluorescence of Cl, N-CDs can be specifically quenched by AmB with a linear concentration range of 0.1–6 μM, a detection limit of 6.67 nM, and a response time within 1 min. Moreover, the Cl, N-CDs can be applied for the determination of AmB in milk and wastewater with good recoveries (92.00–110.00 %). This work provides a facile method for the preparation of Cl, N-codoped CDs with excellent fluorescence properties, and develops a new approach for fluorescence quantification of AmB in real samples.
研究领域:
分析化学
·
环境科学
·
食品科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）