OPTICAL MATERIALS
·
2024
·
IF 3.8
Li Zhang,Qing Shu,Qiong Wu,Xuyao Xing
In this study, SnS 2 /Ti 3 C 2 was synthesized by combining SnS 2 (synthesized via oil bath method) with Ti 3 C 2 (prepared from etching of Al layers from Ti 3 AlC 2 MAX phase). The morphology, structure and photochemical properties of the catalyst were analyzed by various characterization methods. The photocatalytic performance of sample was studied by the degradation of Rhodamine B (RhB) under xenon lamp irradiation. Results showed that SnS 2 /Ti 3 C 2 could achieve 99 % photocatalytic degradation of RhB within 60 min, which was much higher than the 38 % photocatalytic degradation of SnS 2 . In addition, the RhB degradation rate of SnS 2 /Ti 3 C 2 still reached 93 % after 5 cycles. The excellent photocatalytic activity and durability were mainly attributed to the formation of Schottky heterojunction between SnS 2 and Ti 3 C 2 , which was very advantageous for efficiently separating and transferring charge carriers. The work functions of SnS 2 and Ti 3 C 2 Tx were calculated through the DFT calculations, which were 5.22 eV and 5.69 eV respectively. According to barder charge analysis, the charge transfer between SnS 2 and Ti 3 C 2 was 0.04 e. Meanwhile, radical trapping experiments confirmed that h + and •O 2− were the main active species in the reaction system. As a visible light-responsive catalyst, SnS 2 /Ti 3 C 2 could be effectively applied to the degradation of organic dye pollutants, and which has broad application prospects.
研究领域:
材料科学
·
环境科学
·
光催化技术
✓ 已验证
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2025
·
IF 3.6
Zhaoyong Jiao,Zhiheng Shang,Minghuan Cui,Shuwen Zheng,Pan Song,Haiying Wang,Jicai Zhang,Jian Song,Shuhong Ma,Guangrui Jia,Zhongpo Zhou,Chaochao Qin
This study explores the energy transfer mechanisms through visible-light excitation of hybrids based on CsSnBr 3 nanocrystals and Rhodamine B (RhB) chromophores. The ability of RhB dyes to donate energy to CsSnBr 3 is comprehensively investigated with steady-state and time-resolved photoluminescence, as well as femtosecond transient absorption spectroscopy. The Förster resonance energy transfer (FRET) dominates (85.1 %) the photosensitization of the singlet excited state of RhB in the nanocrystal-chromophore hybrids with a rate constant of 4.3 × 10 9 s −1 . These findings reveal the energy transfer mechanism and highlight the design of light-harvesting devices based on CsSnBr 3 nanocrystals and organic chromophores.
✓ 已验证
产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2025
·Vol. 192
·期 8
·1-8
·
IF 5.3
Guo Keyu,Liu Tong,Li Shun,Zhu Daobin,Fan Yuanyuan,Fan Rangrang,Ding Changchun,Jin Wei,Hu Junshan
An upconversion luminescence (UCL) nanoprobe is reported for the rapid detection of hypochlorite ions (ClO − ) in complex environments. The probe is fabricated by sensitizing rhodamine B (RhB) on the surface of core@shell upconversion nanoparticles (C/S UCNPs) with the bridging of polyethylene glycol (PEG) molecules. Under 980 nm excitation, the UCL of C/S UCNPs is quenched by RhB through fluorescence resonance energy transfer (FRET), which can be restored by the oxidative cleavage of RhB induced by ClO − . It is observed that the green emission intensity of RhB-modified C/S UCNPs increases linearly with the concentration of ClO − , enabling quantitative detection of ClO − . Moreover, the excitation of C/S UCNPs requires only a low power density (0.09 W/cm 2 ), which minimizes the photodegradation of RhB and stabilizes the FRET process. Under optimized conditions, the detection limit for ClO − ions in tap water was 5 µg mL⁻ 1 . Graphical abstract
研究领域:
分析化学
·
纳米材料
·
生物传感
✓ 已验证
产品关联
DOI
PubMed
高影响因子
WATER AIR AND SOIL POLLUTION
·
2024
·Vol. 235
·期 7
·1-20
·
IF 3.8
Wang Bo,Huang Lin,Li Silan,Qi Liqiang
Rhodamine B (RhB), an alkaline cationic organic dye, poses a significant threat to natural water environments. In this investigation, composites of Co 3 O 4 and BiOBr/BiOI were synthesized and evaluated for degradation of RhB under visible light irradiation. The photocatalyst (CBB-2) with a 10wt% Co 3 O 4 composite exhibited superior degradation efficiency, achieving 99.5% within 80 min and maintaining robust stability over four cycles. Meanwhile, after 90 min of light exposure, the mineralization rate of RhB reached 57.23%. A suite of characterization techniques verified the successful synthesis of the dual type-II heterojunction in the composite catalyst and the reinforced interactions among its components, thereby enhancing charge separation efficiency and photoresponsive performance. Free radical quenching experiments elucidated the critical role of •O 2 - and h + as radicals in the photocatalytic reaction process.
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
ENVIRONMENTAL TECHNOLOGY
·
2022
·
IF 3.475
Yuchao Zhu,Qiang Wei,Qinyu He,Deyang Chen,Than Zaw Oo,Su Htike Aung,Fuming Chen
Capacitive deionisation (CDI), as a novel electrochemical technology, has attracted a fast-growing research interest over the past years. However, the single function of salt removal limits further development of conventional CDI systems. Herein, we propose a multi-function CDI device, which can achieve the electrochemical desalination, degradation of organic pollutants and removal of heavy metal ions through the redox electrocatalytic deionisation technology. Sulphur-doped reduced graphene oxide (S@rGO) is utilised as the anode to catalyse the degradation of rhodamine B. The Pt-coated graphite paper is used as a cathode for the removal of dichromate ions by the electro-reduction process. The voltage plateau of S@rGO is reduced by ∼0.35 V compared with the pure carbon cloth electrode, indicating the effectiveness of S@rGO as the catalyser. The salt feed is desalted to ∼0.74 mS·cm−1 level at a current density of 1 mA·cm−2. The degradation efficiency of rhodamine B (RhB) and potassium dichromate are 99.1% and 55.3%, respectively. The effects of different current densities and cycling are also investigated. This work is significant for the multi-functional process of water treatment and the device design.Synopsis : The single function of salt removal limits the further development of the CDI system. A multi-function CDI device is proposed to achieve electrochemical desalination, organics degradation and dichromate ion removal.
研究领域:
环境科学
·
材料科学
·
电化学工程
✓ 已验证
DOI
高影响因子
FUEL
·
2020
·
IF 5.578
Zisheng Zhang,Chenxiao Zhao,Shuanglong Lin,Hong Li,Yalan Feng,Xin Gao
A novel oxygen vacancy (OVs) modified Bi 2 MoO 6 /WO 3 hybrid electrode based on the ITO glass was successfully fabricated by a facile two-step hydrothermal and solvothermal method with one calcination process between two reactions. The result exhibited an enhanced optical harvesting and photogenerated electron migration capability. In the degradation process of rhodamine B (RhB), the hybrid electrode showed a better photoelectrocatalytic removal ratio of 80.1% within 4 h under visible light irradiation and 2.0 V bias, which is mainly ascribed to the synergistic promotion of surface OVs, heterostructure and external bias. The optical features and band structures of the composite catalyst were analyzed to give out the possible electrode system mechanism of the PEC degradation process. This work not only constructs a newly designed OVs Bi 2 MoO 6 /WO 3 photoelectrode but also provides some investigations in fabricating and controlling process of photoelectrodes.
研究领域:
材料科学
·
环境科学
·
光催化
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2016
·Vol. 16
·期 4
·4115-4119
·
IF 1.338
Qiao Xiuqing,Hu Fuchao,Hou Dongfang,Li Dongsheng
SnO2/Ag hollow microsphere, assembled form SnO2 and Ag nanoparticles, was synthesized via a facile one-step hydrothermal synthesis method using Na2SnO3.3H2O, CO(NH2)2 and AgNO3 as raw materials.
XRD, SEM, and TEM results revealed that the obtained SnO2/Ag hollow microsphere with diameters of ca.3∼5 μm was built from uniformly distributed rutile SnO2 and cubic Ag nanoparticles. Moreover, XPS results indicate the existence of strong interaction between
Ag and SnO2 nanoparticles, rather than simply physical contact, endowing the SnO2/Ag hollow microspheres with excellent photocatalytic performance in the degradation of RhB solution under visible light irradiation.
研究领域:
材料科学
·
纳米技术
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2024
·
IF 4.3
Zhenhua Wang,Jin Miao,Tao Tan,Lin Guo,Rongli Gao,Yue Chen,Wei Cai,Chunlin Fu,Xiang Lei
The I-III-VI QDs Ag-In-S (AIS) exhibits excellent properties in photocatalysis because of the adjustable band gap, wide light absorption range, and multiple active sites. Introducing homologous or heterogeneous ions not only derives the composition into quaternary/ quinary quantum dots but also generates new sulfide QDs to form composites, which is an effective strategy to promote photoactivity. In this work, we in-situ synthesized the AIS/ZIS (AgIn 5 S 8 /Zn 4 In 2 S 7 ) composite photocatalyst by introducing Zn 2+ and changing the reaction temperature. We found that the composite photocatalyst could efficiently photodegrade larger concentrations of RhB than that of the previous reports. The superior photocatalytic activity was due to the formation of the type I high-low junction, which could effectively separate carriers. The photoelectrons on the CB of AIS reacted with dissolved oxygen to produce strongly oxidative O 2 – , which degraded RhB into intermediates and eventually into CO 2 and H 2 O. This work not only reports an excellent photocatalyst but also offers new ideas on the design and manufacture of highly efficient high-low junction photocatalysts.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2020
·Vol. 10
·期 20
·11851-11860
·
IF 3.119
Rongjing Wang,Yaru Li,Qianyi Sun,Kaihua Gao,Yufu Pan,Meng Li,Feitian Zhang,Ping Na
In this paper, a new photocatalyst with TiO2 nanospheres decorated on ultrathin layered thiostannate H4xK2xSn2−xS4+x (X = 0.5–0.6, HKTS) nanosheets was successfully synthesized by a facile solvothermal method combined with the hydrolysis of tetrabutyl titanate and it was denoted as HKTS/TiO2. By adjusting the content of tetrabutyl titanate, composites with different Sn/Ti molar ratios were prepared. The composites were applied for RhB degradation under visible light irradiation, and the optimum proportion of HKTS/TiO2 was obtained. The results of X-ray diffraction, Raman spectroscopy, Fourier transform infrared spectroscopy and scanning electron microscopy confirmed that TiO2 was successfully decorated on HKTS nanosheets. The combination of TiO2 and HKTS extended the absorption wavelength of TiO2 from UV to visible light range, and the separation efficiency of photoexcited electron–hole pairs was also enhanced. The photocatalytic degradation rate of RhB over HKTS/TiO2-1.0 was almost 97.9% after 60 min illumination, which was higher than those of HKTS and pure TiO2. The photocatalyst exhibited excellent reusability and stability as the degradation rate of RhB was 95.7% even after three cycles. The photocatalytic mechanism experiment indicated that ·O2− and h+ played a dominant role in the photocatalytic process. All these results indicate that the newly fabricated HKTS/TiO2 composites provide a high-performance photocatalyst for waste water treatment, and the application of thiostannate can be extended to the field of photocatalytic materials.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2019
·
IF 0
Lubin Qi,Yanjun Gong,Ming Fang,Zhiwei Jia,Ni Cheng,Li Yu
The fabrication of materials that can efficiently adsorb environmental pollutants such as nonbiodegradable dyes is in urgent demand. In this work, the construction, characterization, and application of surface-active ionic-liquid-encapsulated polyoxometalates (SAILEPs) are reported. These hybrid materials with ordered structures are obtained in the aqueous phase by one-pot self-assembly at room temperature. They demonstrated a high capacity for the rapid adsorption of cationic dyes. The equilibrium time of rhodamine B (RhB) adsorption is only 1 min. These SAILEP materials also can selectively separate RhB from an eosin Y/RhB mixture. The fast and selective adsorption is attributed to electrostatic interactions and high affinities between SAILEPs and RhB. Meanwhile, investigation of the adsorption isotherms and kinetics indicates that the adsorption of dyes follows Langmuir isotherm models and pseudo-second-order kinetics. The self-assembly is investigated by small-angle X-ray scattering, Fourier transform infrared, and dynamic light scatttering. These studies offer further insight on the SAILEP hybrid materials, which have great potential in dye decontamination.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
MATERIALS RESEARCH BULLETIN
·
2015
·
IF 2.288
Weicheng Xu,Jianzhang Fang,Ximiao Zhu,Zhanqiang Fang,Chaoping Cen
A series of novel p−n junction photocatalysts BiOI/Bi 2 Sn 2 O 7 (BiOI/BSO) were successfully fabricated via a facile hydrothermal method. The phase structures, morphologies and optical properties of the as-prepared samples were studied by XRD, TEM, HRTEM, BET, XPS, UV–vis DRS and photoluminescence (PL) spectroscopy. The results showed that BiOI/BSO heteronanostructures displayed much higher photocatalytic activity than pure BSO and BiOI for the degradation of rhodamine B (RhB). The best photocatalytic activity of BiOI/BSO with almost 99.9% RhB degradation situated at molar percentage ratio of 4% after 6 h irradiation. The enhanced photocatalytic performance of BiOI/BSO could be mainly attributed to the formation of the heterojunction between p-BiOI and n-BSO, which effectively restrains the recombination of photoinduced electron–hole pairs. Moreover, the study of radical scavengers affirmed that h + and •O 2 − were the primary reactive species for the degradation of RhB.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2014
·Vol. 50
·期 4
·1594-1604
·
IF 2.305
Zhu Yingming,Xu Dandan,Meng Ming
A series of Bi 2 S 3 /(BiO) 2 CO 3 composite photocatalysts with different loadings of amorphous Bi 2 S 3 were successfully synthesized through an ultrasonic-assisted ion-exchange reaction between thioacetamide (CH 3 CSNH 2 ) and (BiO) 2 CO 3 , and characterized by XRD, XPS, BET, EELS, EDX, SEM, TEM/HRTEM, UV–Vis, and photoluminescence (PL) techniques. The results of TEM/HRTEM, EELS, and EDX indicate that the composite catalyst Bi 2 S 3 /(BiO) 2 CO 3 has been successfully synthesized with the deposited Bi 2 S 3 present in amorphous state on the surface of (BiO) 2 CO 3 . The activities of the catalysts for RhB degradation under visible light show that the catalyst prepared under ultrasonic is more active than the one synthesized without ultrasonic. The optimized sample Bi 2 S 3 /(BiO) 2 CO 3 (U5.0) exhibits a much higher activity, about 4.8 times to that of pure (BiO) 2 CO 3 . Based upon the band structures of Bi 2 S 3 /(BiO) 2 CO 3 , it is deduced that the migration of the visible light-induced electrons from the conduction band of Bi 2 S 3 to that of (BiO) 2 CO 3 should have facilitated the separation of photogenerated carriers, as confirmed by the suppressed photoluminescence spectra. Using different scavengers, the ·O 2
− and holes are clearly identified as the main oxidative species for RhB photodegradation. In light of these observations, a potential photocatalytic mechanism of RhB degradation over Bi 2 S 3 /(BiO) 2 CO 3 is proposed.
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
危险品化学品经营许可证（带存储）