SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Ting Li,Xianfa Zhang,Xiaoli Cheng,Yingming Xu,Shan Gao,Lihua Huo
It is necessary to achieve highly sensitive and low temperature detection of Cl 2 for the protection of the environment and human life and health. How to achieve sensitive detection of Cl 2 at low temperature remains a challenge. The construction of heterojunction is beneficial for promoting carrier transfer, increasing active sites, thus effectively improving sensing performance of materials. In this study, the flower sphere-like Cu 2 O/CuO composite with p-p heterojunction was obtained by using Cu-CPs as precursor followed with sintering treatment. The Cu 2 O/CuO sensor exhibits high response (S=405) to 10 ppm Cl 2 at low temperature (50 °C), the response/recovery time is 50 s/2420 s. At the same time, the Cu 2 O/CuO sensor has a low detection limit (50 ppb) and good long-term stability (60 days). The characterization results, e.g. electron paramagnetic resonance (EPR), O 2 /Cl 2 -temperature programmed desorption ( O 2 /Cl 2 -TPD), X-ray photoelectron spectroscopy (XPS) etc., reveal that oxygen vacancy effectively promotes the increase of surface adsorbed oxygen, the formation of p-p heterojunction not only modulates the electronic properties of Cu 2 O/CuO but also provides abundant adsorption sites for gas. The synergistic effect of the above factors makes Cu 2 O/CuO composite exhibit satisfactory Cl 2 sensing performance.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Yangyang Li,Ji Li,Ting Li,Xiaoli Cheng,Yingming Xu,Shan Gao,Lihua Huo
Chlorine (Cl 2 ), a toxic and hazardous gas with a pungent odor, has already posed threat to air quality and human health. Therefore, developing chlorine sensors with high response and low power consumption is crucial. In this work, raspberry-like SnO 2 decorated uniformly with SnS nanoparticles was synthesized via a facile solvothermal method followed by an in-situ sulfurization process, which can be used for highly selective and sensitive detection of Cl 2 at 50 °C. The SnS/SnO 2 sensor exhibits ultrahigh response (R g /R a = 1136) toward 10 ppm Cl 2 at optimal working temperature of 50 °C, achieving low detection limit down to 0.05 pp m (S = 1.52), which is 2.5 times higher than that of pure SnO 2 sensor. Its superior sensing performance can be attributed to the formation of the p-n heterostructure, which accelerates electron transfer within the material. More importantly, the as-prepared SnS/SnO 2 sensor still exhibits effective and stable detection performance toward residual chlorine in daily life, significantly extending its practical applicability and providing valuable reference for developing high-performance near room-temperature gas sensors.
✓ 已验证
产品关联
DOI
高影响因子
IONICS
·
2022
·Vol. 28
·期 9
·4321-4329
·
IF 2.961
Zhang Jin-Zhong,Wu Shuai,Shen Fengxia,Song Wenkang,Hua Yaxin,Wu Zhenyu,Zhang Xiao-Gang,Shi Jin
A novel gas diffusion electrode (GDE) electrolyzer has been constructed to convert CO 2 into CO, with chlorine (Cl 2 ) and sodium carbonate (Na 2 CO 3 ) produced as the by-products. Using this method, the product value yielded from CO 2 electrolysis can be increased substantially. In contrast to the conventional GDE electrolyzer, we use a cation-exchange membrane as the diaphragm to separate the cathode from the anode compartment, and use NaCl aqueous solution as the anolyte. During the electrolysis process, CO 2 is reduced to CO on the cathode, with CO 3 2− generated accompanied with CO formation. On the anode, Cl − is oxidized to Cl 2 . Na + in the anode chamber transfers through the cation-exchange membrane, and migrates into the catholyte. Thus, Na 2 CO 3 can be obtained owing to the co-existing of Na + and CO 3 2− in the catholyte. Using this method, CO 3 2− penetrating through the anion-membrane can be avoided. This problem has been considered as the crucial obstacle that impedes the practical utilization of the conventional GDE electrolyzer. Our designed GDE electrolyzer has a promising application perspective in the phosgene chemical industry.
✓ 已验证
DOI
高影响因子
JOURNAL OF CATALYSIS
·
2025
·
IF 6.5
Mengshan Deng,Chaosi Liu,Jiaqi Xu,Xinqing Lu,Rui Ma,Yanghe Fu,Weidong Zhu
Rutile-type TiO 2 supported RuO 2 catalysts show a remarkably low-temperature activity in the catalytic gas-phase oxidation of HCl to Cl 2 , i.e. , the Deacon process. Although it is found that the oxygen vacancies in TiO 2 can enhance the activity and stability of supported RuO 2 catalysts in the Deacon process, the role of oxygen vacancies in the catalytic performance has not been clearly illustrated yet. In the current study, oxygen vacancies were introduced onto TiO 2 through a straightforward yet highly effective treatment of the commercial rutile-TiO 2 with H 2 at an optimal reduction temperature of 600 °C, named TiO 2 -600, which was then used as the support for preparing RuO 2 /TiO 2 -600 via an incipient wetness impregnation method. The comprehensive characterizations of TiO 2 , TiO 2 -600, and their supported RuO 2 catalysts conclusively demonstrate that the introduced oxygen vacancies on TiO 2 are consumed for the formation of the RuO 2 nanoparticles with the enhanced RuO 2 dispersion and the increased interactions between RuO 2 and TiO 2 -600, resulting in the higher catalytic activity and stability of RuO 2 /TiO 2 -600 in the Deacon process, compared to RuO 2 /TiO 2 . Consequently, this study not only clarifies the role of oxygen vacancies on TiO 2 but also offers valuable insights to guide the development of Deacon catalysts with a high low-temperature activity and a long-term stability.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Shuai Wu,Xinbo Shi,Jin Shi,Tianyou Chen,Ting Jin,Fengxia Shen,Jiangfeng Mou,Shipeng Miao
A three-membrane electrolysis cell has been developed for the efficient conversion of CO 2 to CO, with Cl 2 and Na 2 CO 3 produced as byproducts. This cell consists of two chambers separated by a three-membrane assembly comprising a cation exchange membrane (CEM), a liquid electrolyte membrane (LEM), and a polyethylene (PE) membrane. In the cathodic chamber, CO 2 is electrochemically reduced to CO in organic electrolyte. And in the anodic chamber, Cl⁻ is oxidized to Cl 2 in aqueous solution. Simultaneously, Na⁺ migrates through the three-membrane system and enters into the cathode compartment, where, they combine with CO 3 2− generated from CO 2 reduction to form solid Na 2 CO 3 . The produced CO and Cl 2 can be served as feedstock for phosgene synthesis. This work presents a promising strategy for converting CO 2 into high-value chemicals.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Quanfa Zhong,Zhong Zhang,Qinglong Fu,Jin Yu,Xiaoting Liao,Jianshu Zhao,Di He
Cl 2 •− can be the dominant radical species when high salinity wastewater is treated by advanced oxidation processes (AOPs). In this study, the steady-state concentrations of HO • , Cl • and Cl 2 •− were determined during the Fenton treatment of two landfill leachate concentrates with significantly different Cl − concentrations (XPNF: 1406 mg/L; SNNF: 8036 mg/L). Based on the steady-state concentrations of the radical species and measured second-order rate constants with dissolved organic matters (DOM), HO • accounted for 76.2% of DOM transformation in XPNF, while Cl 2 •− accounted for 96.5% in SNNF. The DOM transformation dominated by HO • or Cl 2 •− was then thoroughly compared to investigate the reactivities of HO • and Cl 2 •− with DOM at molecular level using high-resolution mass spectrometry. The results showed that formulas with low oxidation degree (O/C < 0.5) were preferentially removed by HO • and HO • was more reactive towards compounds with high saturation degree (H/C > 1.5) compared with Cl 2 •− . In contrast, Cl 2 •− was more reactive to the compounds with lower saturation level (H/C < 1.5) and the reaction of Cl 2 •− with DOM was less dependent on DOM oxidation degree. In addition, HO • preferentially reacted with the CHON compounds with low N content, while Cl 2 •− was more reactive to CHON compounds with higher N content compared with HO • . To our knowledge, this is the first study to distinguish the difference in the reactivity of HO • and Cl 2 •− towards DOM at molecular level.
✓ 已验证
产品关联
DOI
高影响因子
ACS ES&T Water
·
2025
·
IF 4.3
Qiqi Wan,Yiwei Han,Ruihua Cao,Shaolan Du,Jingyi Wang,Tinglin Huang,Gang Wen
The electrochemically driven UV light-emitting diode/chlorine (UV-LED/EC-Cl2) process represents an emerging advanced oxidation technology capable of simultaneously removing microorganisms and micropollutants, making it particularly suited for decentralized water treatment in rural areas (utilized naturally occurring Cl– in water). This research systematically investigated the removal efficiency and underlying mechanisms of the UV-LED/EC-Cl2 process for the selected microorganisms (Aspergillus niger spores) and herbicides (atrazine (ATZ) and 2,4-dichlorophenoxyacetic acid (2,4-D)). The results demonstrated a significant synergistic effect in fungal spore inactivation, primarily attributed to the generation of reactive radical species, which induced severe membrane disruption and elevated intracellular reactive oxygen species levels. Furthermore, the UV-LED/EC-Cl2 process exhibited exceptional herbicide removal efficiency, achieving over 90% degradation within 37 min. The coexistence of A. niger spores reduced the herbicide degradation efficiency by approximately 10%, with the degradation products of ATZ exhibiting increased molecular weight and toxicity. Even in actual groundwater, the UV-LED/EC-Cl2 process maintained a high removal efficiency. Additionally, the electrical energy per log removal of herbicide ranged from 18.3 to 32.5 kWh/m3-log, lower than that of the standalone processes. These findings underscore the potential of the UV-LED/EC-Cl2 process as an effective and energy-efficient solution for simultaneous microorganisms and micropollutant removal in decentralized water treatment.
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Sumin Wang,Rui Gao,Yuanyuan Wu,Ting Li,Ming Zheng,Xianfa Zhang,Yingming Xu,Shan Gao,Xin Zhou,Lihua Huo
Synthesizing a gas-sensitive material for detecting Cl 2 at low temperatures remains a challenge in terms of lowering the operating temperature of the gas sensors. In this paper, a simple hydrothermal method was used to prepare thin film of MIL-68(In) nanoparticles grown in-situ on ceramic tubes and calcined to obtain an oxygen defect-rich In 2 O 3 sensitive thin film. At a low temperature of 50 °C, this In 2 O 3 thin-film sensor can achieve a response of 14.1–5 ppm Cl 2 , with a minimum detectable concentration of 100 ppb. The sensor has a clear advantage in terms of optimal operating temperature. In addition, the optoelectronic properties of the sensor, the types of adsorbed oxygen on the surface and the effect of oxygen defects are investigated in detail, and the density functional theory calculations were used to corroborate the actual characterization results with the theoretical calculation simulation results. It provides an in-depth analysis of the reasons for the excellent sensing performance of the sensor to chlorine.
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Guanglu Xia,Jianhao Qiu,Shengwang Gong,Dingliang Dai,Biyao Fang,Yixin Li,Jianfeng Yao
Specific intermolecular interactions are the keys to constructing benign interfacial compatibility, which determines the activities of hybrid photocatalysts. In this study, CdS/TpPa-Cl 2 /MXene hybrids were compactly developed through the mediation of chlorine groups in TpPa-Cl 2 with MXenes and CdS. Owing to the formation of the Schottky junction between TpPa-Cl 2 and MXene and the heterojunction between TpPa-Cl 2 and CdS, as well as the close interfacial contacts among them, the photogenerated electron–hole pairs are effectively separated, which ultimately results in efficient photocatalytic activities. For visible-light-driven H 2 O 2 production in ambient air and pure water, CdS/TpPa-Cl 2 /MXene hybrids could achieve a high H 2 O 2 yield of 1005 μmol·L –1 , which is 2.5, 9.7 and 6.5 times greater than those of pure TpPa-Cl 2 , MXene and CdS, respectively. The mechanism investigation revealed that an indirect O 2 reduction pathway with ·O 2 – as an intermediate occurred for H 2 O 2 production over the CdS/TpPa-Cl 2 /MXene composites, and this two-electron O 2 reduction process was manifested as the primary way. This study provides insight into the construction of multi-component composite photocatalysts with high efficiency on the basis of covalent organic frameworks.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Xiaoqian Meng,Rui Gao,Ming Zheng,Xin Zhou,Xianfa Zhang,Xiaoli Cheng,Yingming Xu,Shan Gao,Lihua Huo
Real-time monitoring of chlorine gas (Cl 2 ) with a strong irritating odor is an indispensable means of avoiding its contamination of the air and harm to the body. To achieve this purpose, a novel gas-sensitive material capable of detecting low concentrations of Cl 2 at near room temperature is developed in this paper. ZIF-8 with a kinetic diameter of 3.4 Å in the designed ZnO@ZIF-8 composites is able to sieve gas molecules with different kinetic diameters, enabling effective improvement of the selectivity of the gas-sensitive materials. In addition, the porous structure of ZIF-8 can provide more reactive sites, which is conducive to improving gas adsorption capacity and providing of channels for gas diffusion. In this study, ZnO@ZIF-8 heterojunction composites are prepared by combining the advantages of ZnO and ZIF-8, which provides a new method for real-time monitoring of low concentrations of Cl 2 , and also has potential practical applications in fields such as environmental monitoring and industrial safety.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS CHEMISTRY
·
2012
·Vol. 22
·期 38
·20512-20519
·
IF 5.968
Sa Liu,Li Zhou,Pengjie Wang,Linsong Zhang,Zhigang Shao,Baolian Yi
A new blend ultrafiltration (UF)/nanofiltration (NF)-based proton-conductive membrane, which comprised poly(ether sulfone) (PES), sulfonated poly(ether ether ketone) (SPEEK) and absorbed aqueous acid, as an alternative to traditional exchange membrane, was proposed and designed for H2/Cl2 fuel cells. The effect of SPEEK concentration at different degree of sulfonation on membrane properties was systematically studied. The room-temperature conductivity of the prepared membrane doped with 3 M hydrochloric acid reached up to 106–131 mS cm−1. The electrochemical characteristics of membrane/electrode assemblies using the PES–SPEEK composite membrane were also analyzed. The cell exhibited better performance than that of a cell based on Nafion 212 membrane (about twice). The study provides an effective way to fabricate high performance porous membranes for H2/Cl2 fuel cell applications.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2015
·Vol. 3
·期 19
·10386-10394
·
IF 7.443
Chun-Chao Hou,Ting-Ting Li,Shuang Cao,Yong Chen,Wen-Fu Fu
A molecular photosensitizer [Ru(dcbpy)(bpy)2]2+ (dcbpy = 2,2′-bipyridyl-5,5′-dicarboxylic acid) and a proton reduction catalyst Pt(dcbpy)Cl2 were successfully incorporated into a highly robust metal–organic framework (MOF) of Zr(IV)6O4(OH)4(bpdc)6 (bpdc = 4,4′-biphenyldicarboxylic acid) by making use of a mix-and-match approach. The molecular integrity of the Ru and Pt complexes within the MOFs was demonstrated by a variety of techniques, including XRD, BET, TGA, SEM, TEM, HAADF-STEM, EDX, DRUS and XPS. This di-component Ru–Pt@UIO-67 MOF assembly allows a facile arrangement of the photosensitizer and the reduction catalyst with close spatial proximity, promotes the electron transfer between them, and thus leads to a significantly improved hydrogen evolution activity in aqueous solution at pH 5.0 upon visible light irradiation. This Ru–Pt@UIO-67 system represents the first example of MOFs functionalized with two different transition metal complexes, which can be used as a photosensitizer and catalyst, respectively, for hydrogen generation from water.
✓ 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）