Journal of Colloid and Interface Science最新文献

{"title":"Promoting gas adsorption and charge transfer by activating iron incorporation sites for high performance trimethylbenzene sensing.","authors":"Yanxu Feng, Mengying Du, Chenlu Hu, Bosen Zhang, Jie Huo, Haixu Cui, Shuangming Wang, Qianqian Song, Jing Cao, Xiao Dong","doi":"10.1016/j.jcis.2024.11.227","DOIUrl":"10.1016/j.jcis.2024.11.227","url":null,"abstract":"<p><p>The interaction between the surface and the target gas is the key to determining gas sensing performances of sensing materials, and revealing the interaction mechanism between the two still faces challenges. Herein, activating iron incorporation sites strategy is applied to address this issue. The gas sensor based on iron incorporation Co₃O₄ hierarchical porous architectures shows a significant gas selectivity toward trimethylbenzene, high sensing response, well long-term stability, rapid response/recovery speed and superior humidity resistance. It can be found that the sensing responses are positively correlated with the number and the species of hydrogen substituents on the benzene rings. In contrast, Co₃O₄ without iron incorporation does not exhibit any gas sensing performance. The density functional theory (DFT) calculations confirm that strong trimethylbenzene adsorption and charge transfer between Fe_Co sites and benzene ring of gases molecules lead to significantly enhanced trimethylbenzene gas sensing performance.</p>","PeriodicalId":351,"journal":{"name":"Journal of Colloid and Interface Science","volume":"682 ","pages":"369-380"},"PeriodicalIF":9.4,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142779170","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"In situ growth of bismuth oxybromide/bismuth molybdate 2D/2D Z-scheme heterojunctions with rich interfacial oxygen vacancies for photocatalytic benzylic C(sp³)-H bond activation.","authors":"Songting Gu, Chenyu Li, Xinyan Lin, Xiaotong Lin, Yingxi Xiao, Xiaoyang Zhao, Junmin Nan, Xin Xiao","doi":"10.1016/j.jcis.2024.11.233","DOIUrl":"10.1016/j.jcis.2024.11.233","url":null,"abstract":"<p><p>The selective oxidation of toluene into valuable chemicals via photocatalytic C(sp³)-H bond activation represents a significant, yet challenging process. Here, the in situ construction of bismuth oxybromide/bismuth molybdate (BiOBr/Bi₂MoO₆) 2D/2D Z-scheme heterojunctions featuring interface-induced oxygen vacancies (OVs) is introduced. The optimized BiOBr/Bi₂MoO₆ sample has a remarkable yield rate of benzaldehyde at 2134.28 μmol g^-1 h^-1 under blue LED irradiation, surpassing the performance of BiOBr and Bi₂MoO₆ by 8.1 and 2.9 times, respectively. Insights from density functional theory (DFT) calculations, electron paramagnetic resonance (EPR), and in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) studies highlight the critical role of the Z-scheme electronic configuration and OVs in attaining the superior photocatalytic toluene conversion efficiency. This study advances the photocatalytic conversion of benzaldehyde within an OV-enhanced direct Z-scheme system, facilitating the activation of inert C(sp³)-H bonds, and contributes to the development of high-performance catalysts for sustainable chemical processes.</p>","PeriodicalId":351,"journal":{"name":"Journal of Colloid and Interface Science","volume":"682 ","pages":"467-477"},"PeriodicalIF":9.4,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142783496","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Interface Engineering of RuO₂/Ni-Co₃O₄ Heterostructures for enhanced acidic oxygen evolution reaction.","authors":"Bilal Zaman, Dongxu Jiao, Jinchang Fan, Dewen Wang, Huafeng Fan, Ming Gong, Shan Xu, Yanhua Liu, Muhammad Faizan, Xiaoqiang Cui","doi":"10.1016/j.jcis.2024.11.246","DOIUrl":"10.1016/j.jcis.2024.11.246","url":null,"abstract":"<p><p>RuO₂ has been recognized as a standard electrocatalyst for acidic oxygen evolution reaction (OER). Nonetheless, its high cost and limited durability are still ongoing challenges. Herein, a RuO₂/Ni-Co₃O₄ heterostructure confining a heterointerface (between RuO₂ and Ni-doped Co₃O₄) is constructed to realize enhanced OER performance. Specifically, RuO₂/Ni-Co₃O₄ containing a low Ru content (2.7 ± 0.3 wt%) achieves an overpotential of 186 mV at a current density of 10 mA cm^-2 with a long-run stability (≥1300 h). Also, it exhibits a mass activity of 1202.29 mA mg_Ru^-1 at an overpotential of 250 mV, exceeding commercial RuO₂. The results disclose an optimum electron transfer at the heterointerface, wherein Ni doping improves the adsorption energy of oxygen-containing intermediates, thereby facilitating OER. This study presents an effective approach for designing highly active and stable OER electrocatalysts.</p>","PeriodicalId":351,"journal":{"name":"Journal of Colloid and Interface Science","volume":"682 ","pages":"548-555"},"PeriodicalIF":9.4,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142783598","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synergistically piezocatalytic and Fenton-like activation of H₂O₂ by a ferroelectric Bi₁₂(Bi_0.5Fe_0.5)O_19.5 catalyst to boost degradation of polyethylene terephthalate microplastic (PET-MPs).","authors":"Meixuan Wu, Renshu Wang, Lin Miao, Pengfei Sun, Baocheng Zhou, Yubing Xiong, Xiaoping Dong","doi":"10.1016/j.jcis.2024.12.002","DOIUrl":"10.1016/j.jcis.2024.12.002","url":null,"abstract":"<p><p>Pollution of microplastics (MPs) has been drastically threating human health, however, whose elimination from the environment by current approaches is inefficient due to their high molecular weight, stronghydrophobicity and stable covalent bonds. Herein, we report a novel and highly-efficient route to degrade MPs contaminants through synergistically piezocatalytic and Fenton-like activation of H₂O₂ by a ferroelectric Bi₁₂(Bi_0.5Fe_0.5)O_19.5 catalyst under ultrasound treatment. For 10 g/L polyethylene terephthalate microplastics (PET-MPs), the synergistic strategy reached a 28.9 % removal rate in 72 h, which is greatly enhanced in comparison to the individual piezocatalysis and Fenton (Fenton-like) activation. By optimizing the types of oxidants (H₂O₂, peroxymonosulfate and peroxydisulfate) and bismuth ferrite catalysts (non-piezoelectric Bi₂Fe₄O₉ and piezoelectric BiFeO₃/Bi₁₂(Bi_0.5Fe_0.5)O_19.5), it was revealed that H₂O₂ is the best oxidant, and the piezoelectric Bi₁₂(Bi_0.5Fe_0.5)O_19.5 with a high aspect-ratio morphology showed higher activity than the Bi₂Fe₄O₉ and BiFeO₃. The catalyst dosage and H₂O₂ concentration were further optimized, and the good durability of the catalyst was also demonstrated through multiple uses. Different characterization technologies demonstrated the occurrence of PET-MPs oxidation and fragmentation during the treatment process. The plausible mechanism of synergistically piezocatalytic and Fenton-like H₂O₂ activation was proposed based on measurements of band structure, piezoelectric property and reactive oxygen species generation. Finally, we detected the intermediates and determined a possible degradation route of PET-MPs. The toxicity assessment indicated that the produced intermediates have low toxicity and potential risks to the environment.</p>","PeriodicalId":351,"journal":{"name":"Journal of Colloid and Interface Science","volume":"682 ","pages":"738-750"},"PeriodicalIF":9.4,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142790581","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An interactive organic-inorganic composite interface enables fast ion-transport, low self-discharge and stable storage of lithium battery.","authors":"Ping Li, Zhe Cheng, Yingke Zhou, Enmin Xu, Luozhi Mo, Xiaohui Tian","doi":"10.1016/j.jcis.2024.11.231","DOIUrl":"10.1016/j.jcis.2024.11.231","url":null,"abstract":"<p><p>Lithium batteries have been widely used in various fields, however, further research needs to be conducted to improve their stability and long-term storage performance for the highly active lithium metal anode. Herein, an organic-inorganic composite film composed of polypropylene carbonate (PPC), lithium bis(trifluoromethanesulphonyl)imide (LiTFSI) and Li_6.5La₃Zr_1.5Nb_0.5O₁₂ (LLZNO) is fabricated on the lithium foil surface by spin-coating technique to passivate the lithium anode and regulate the ion transport behavior. The Li/CF_x battery with the optimized composite film coated lithium anode exhibits excellent discharge capacity (1006.6 mAh/g, 0.1C) and high-rate capability (639.4 mAh/g, 5C), much higher than those of the uncoated Li/CF_x battery. The discharge specific capacity remains 521.7 mAh/g at 0.1C after stored at 55 °C for 60 days, corresponding to a monthly self-discharge of 1.87 %, while the battery without coating film has almost failed. Theoretical calculation, Raman mapping and Kelvin probe force microscopy (KPFM) measurements demonstrate that the stable and ion-conductive composite film effectively increases ion channels, regulates ion migration and passivates the Li anode from the corrosion of liquid electrolyte during discharge and storage. Constructing a rational organic-inorganic composite film with high mechanical stability and ionic conductivity on the Li anode surface is a facile and cost-effective strategy to enhance the high-rate and long-term storage performance of Li/CF_x battery.</p>","PeriodicalId":351,"journal":{"name":"Journal of Colloid and Interface Science","volume":"682 ","pages":"578-588"},"PeriodicalIF":9.4,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142790798","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A degradable polyimide aerogel with highly efficient solar-thermal-electric effect for oil absorption, deicing, and power generation.","authors":"Shiwei Chen, Dongfang Gao, Lixia Long, Wenxuan Cui, Chaofeng Zhu, Xue Wang, Bing Li, Yu Chen, Yuanyue Li, Chuanxing Jiang","doi":"10.1016/j.jcis.2024.12.024","DOIUrl":"10.1016/j.jcis.2024.12.024","url":null,"abstract":"<p><p>Photothermal materials are considered as promising materials because they can convert clean solar energy into thermal and electrical energy. However, developing degradable photothermal materials with highly efficient solar-thermal-electric energy conversion performance remains a huge challenge. Here, a superhydrophobic bio-polyimide/carbon quantum dots aerogel (S-BioPI/CQDs) is synthesized. S-BioPI/CQDs exhibits superhydrophobicity (WCA = 155°) and super lipophilicity (OCA = 0°). Remarkably, S-BioPI/CQDs shows good solar-thermal-electric energy conversion properties. The surface temperature of S-BioPI/CQDs can be up to 80 °C within 68 s under the solar light irradiation of 1 kW m^-2. S-BioPI/CQDs has large crude oil adsorption capacity (up to 68.8 times as much as its own weight) and deicing under sunlight irradiation. Meanwhile, the output voltage can be up to 706 mV under the solar light irradiation of 5 kW m^-2. S-BioPI/CQDs can resist the impact of harsh environments, such as high temperatures, dynamic ocean environments, and strong acid environment. More importantly, S-BioPI/CQDs can be degraded completely within only 8 min. This is the first time to achieve the degradation of PI aerogel. This study provides a new and effective method to prepare advanced photothermal materials with degradable performances for the efficient use of solar energy to solve the fossil fuel crisis and protect the environment.</p>","PeriodicalId":351,"journal":{"name":"Journal of Colloid and Interface Science","volume":"682 ","pages":"1006-1016"},"PeriodicalIF":9.4,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142805964","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Regulating the dispersion of CuO over SiO₂ surface for selective oxidation of isobutane to tert-butanol.","authors":"Renjie Ji, Ning Li, Jiale Xu, Rui Huang, Xiaoyu Yan, Xiuyi Li, Yuhan Sun, Chunyi Li","doi":"10.1016/j.jcis.2024.11.119","DOIUrl":"10.1016/j.jcis.2024.11.119","url":null,"abstract":"<p><p>Controlling the highly selective oxidation of CH bonds in alkanes was still a challenge in the oxidation process, especially in oxygen atmospheres. Herein, three CuO/SiO₂ catalysts were designed and prepared by regulating the introduction of copper species to achieve the selective oxidation of tertiary C-H of isobutane (i-C₄H₁₀) to tert-butanol (TBA). Under the condition of 130 °C and 1.5 h, CuO/SiO₂-DP catalyst could achieve 92.7 % O₂ conversion and 85.1 % TBA selectivity, and the cycle stability could be maintained. The improvement of catalytic performance could be attributed to the efficient utilization of Cu atoms, which was related to the regulating the formation of copper phyllosilicate and the full utilization of Si-OH on the surface of SiO₂ during the catalyst synthesis process. Copper phyllosilicate formed a rich Si-O-Cu unit, enhanced the metal oxide-support interaction, inhibited the growth of copper species, improved the anchoring and dispersion of CuO, and ultimately improved the accessibility of substrate molecules on active CuO (111). In addition, the adsorption configuration of i-C₄H₁₀ and O₂ on CuO (111) was determined by in-situ FT-IR and DFT, and the existence form of O₂ after charge transfer was discussed. The reaction mechanism of i-C₄H₁₀ oxidation to TBA was revealed, which provided theoretical guidance for the selective preparation of TBA from i-C₄H₁₀ over metal oxides.</p>","PeriodicalId":351,"journal":{"name":"Journal of Colloid and Interface Science","volume":"681 ","pages":"215-228"},"PeriodicalIF":9.4,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142764990","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Photoclick surface modification of MOF-808 for galactose-mediated targeted chemotherapy.","authors":"Yang Wang, Rachel L Foulkes, Nikolaos Panagiotou, Panagiota Markopoulou, Andrea Bistrović Popov, Arvin Eskandari, Ljiljana Fruk, Ross S Forgan","doi":"10.1016/j.jcis.2024.11.129","DOIUrl":"10.1016/j.jcis.2024.11.129","url":null,"abstract":"<p><p>Controllable surface modification of nanoparticulate drug delivery vectors is key to enhancing specific desirable properties such as colloidal stability, targeting, and stimuli-responsive cargo release. Metal-organic frameworks (MOFs) have been proposed as potential delivery devices, with surface modification achieved by various bioconjugate \"click\" reactions, including copper-catalysed and strain-promoted azide-alkyne cycloaddition. Herein, we show that photo-induced nitrile imine-mediated tetrazole-ene cycloaddition (NITEC) can be used to surface-modify tetrazole-appended Zr MOFs with maleimides, and vice versa, with the extent of this traceless surface functionalisation controlled by the length of photoirradiation. This \"photoclick\" surface modification protocol is exemplified by the decorating of carboplatin-loaded MOF-808 with galactose units to target asialoglycoprotein receptors of specific cancer cell types. Targeting towards HepG2 cells, which overexpress these receptors, is indicated by enhanced endocytosis and cytotoxicity in both two- and three-dimensional cell cultures compared to other cell lines. The study shows both the power of the NITEC protocol for functionalisation of MOFs, and also the benefits of carbohydrate targeting in drug delivery vectors, with scope for significant additional work diversifying the surface targeting units available for nanoparticle functionalisation under these mild, biocompatible \"photoclick\" conditions.</p>","PeriodicalId":351,"journal":{"name":"Journal of Colloid and Interface Science","volume":"681 ","pages":"416-424"},"PeriodicalIF":9.4,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142783785","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Turn the dust into glory: Hierarchical porous carbon cubes derived from waste tire pyrolysis oil exhibits high capability in symmetric capacitors.","authors":"Qi Zhang, Dong Sun, Ke Wang, Zhuang Ma, Ting Xiao, Jinsen Gao, Chunming Xu, Zhihua Xiao, Xinlong Ma","doi":"10.1016/j.jcis.2024.10.065","DOIUrl":"10.1016/j.jcis.2024.10.065","url":null,"abstract":"<p><p>Fabricating suitable porous carbon materials that are simultaneously applied in various electrochemical energy storage (EES) systems including supercapacitors (SCs) and lithium-ion capacitors (LICs) has an important significance in meeting the increasing demands in high energy density, high power density along with ultra-long life. Herein, cubic hierarchical porous carbon (CHPC) with abundant micro-mesoporous structures and moderate S, N co-doped atoms has been rationally designed by using MgO cubes as the templates and waste tire pyrolysis oil (WTPO) as carbon source and dopant. Attributed to the unique microstructures, the CHPC materials have been successfully utilized in different EES systems. In the aqueous electrolyte system, the assembled CHPC-2//CHPC-2 with 2 mg cm^-2 delivered high specific capacitance of 199.0 at 1 A/g, along with 98.5 % capacity retention rate for 20,000 cycles at 6 A/g. Even at high mass loading of 12 mg cm^-2, CHPC-12//CHPC-12 still can deliver high gravimetric and areal capacitances of 187.0 F g^-1 and 2.24 F cm^-2 at 10 A/g, showing an excellent high-loading performance. Even under extreme conditions of -40 and 60 °C, the assembled SCs still can deliver an ultrahigh capacity retention rate of 97.9 % and 100 % at 10 A/g for 2000 and 8000 cycles, respectively. In addition, the symmetric CHPC//CHPC LICs also have been assembled and displayed a maximal energy density of 133.5 Wh Kg^-1 at 1178.2 W Kg^-1. This work provides new insight into the high-value utilization of WTPO for prepared porous carbon with excellent electrochemical performance in various EES systems.</p>","PeriodicalId":351,"journal":{"name":"Journal of Colloid and Interface Science","volume":"679 Pt A","pages":"1219-1230"},"PeriodicalIF":9.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142454821","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Separator modification with a high-entropy hydroxyphosphate, Co_0.29Ni_0.15Fe_0.33Cu_0.16Ca_3.9(PO₄)₃(OH), for high-performance Li-S batteries.","authors":"Xinyuan Wang, Yuxin Fan, Lei Xie, Huibing He, Guifang Wang, Jinliang Zhu","doi":"10.1016/j.jcis.2024.10.058","DOIUrl":"10.1016/j.jcis.2024.10.058","url":null,"abstract":"<p><p>The shuttle effect of lithium polysulfides (LiPSs) significantly hinders the practical application of lithium-sulfur batteries (LSBs). Herein, a high-entropy hydroxyphosphate (Co_0.29Ni_0.15Fe_0.33Cu_0.16Ca_3.9(PO₄)₃(OH), denoted as HE-CHP), was synthesized by metal cation exchange with calcium hydroxyphosphate (CHP) and then coated on polypropylene (PP) separators to suppress the shuttling of LiPSs. Density functional theory calculations indicated that the various introduced metal cations could effectively modulate the binding strength of soluble polysulfides and enhance the reaction kinetics of LiPSs conversion. As a result, LSBs using the HE-CHP@PP separator exhibited an excellent discharge capacity (1297 mAh g^-1 under 0.2 C) and a slow capacity decay during long-term cycling (0.046 % per cycle at 2 C). At a sulfur loading of up to 6.5 mg cm^-2, the LSB with HE-CHP@PP separator displayed a discharge capacity of 5.8 mAh cm^-2. Notably, the CNT@S||Li Li-S pouch cell with HE-CHP modified separator delivered an initial energy density of 432 Wh kg^-1.</p>","PeriodicalId":351,"journal":{"name":"Journal of Colloid and Interface Science","volume":"679 Pt A","pages":"1076-1083"},"PeriodicalIF":9.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142454817","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}