采用煅烧-铵盐复合改性方法制备了室温甲醛去除用竹基活性炭,并运用热重分析仪(TG-DTG)、X射线衍射仪(XRD)、扫描电子显微镜(SEM)、傅里叶红外光谱仪(FT-IR)、N2吸附脱附仪等分析了复合改性对样品热稳定性、组织结构、比表面积和表面官能团的影响规律。结果表明:经煅烧-铵盐复合改性的竹基活性炭样品由非晶体组成,样品表面富含羟基、SO、C—H或O—H等官能团,样品中含有大量的介孔、大孔等,其比表面积、孔容分别为164.21m2/g、0.1363mL/g,分别是未改性样品的195.49倍、10.65倍,从而使样品的室温甲醛去除率达到97.21%,比未改性样品增加了46.99%。煅烧-铵盐复合改性有利于改善竹基活性炭的孔结构、表面性质等,从而提高其室温甲醛去除性能。
The bamboo-based activated carbon for removal of formaldehyde at room temperature was prepared by calcination and ammonium salt composite modification.The effects of composite modification on the thermal stability,microstructure,specific surface area and surface functional groups of the samples were investigated by using thermogravimetric analyzer (TG-DTG),X-ray diffraction (XRD),scanning electron microscope (SEM),Fourier transform infrared spectrometer (FT-IR) and N2-adsorption/desorption.The results showed that the bamboo based activated carbon modified by calcination-ammonium salt was composed of the amorphous phase,and the surface of the sample was rich in functional groups such as hydroxyl,SO,C—H and O—H.The sample contained a large number of mesoporous and macropore.The specific surface area and pore volume of the sample were 164.21m2/g,0.1363mL/g,which were the 195.49 times and 10.65 times higher than those of the unmodified sample,respectively.Thus,the formaldehyde removal rate at room temperature of the modified sample reached 97.21%,which was 46.99% higher than that of unmodified sample.The calcination and ammonium salt composite modification was beneficial to improve the pore structure and surface properties of bamboo-based activated carbon,thereby enhancing its room temperature formaldehyde removal performance.
[1] Kim Y M,Kim J,Ha S C,et al.Harmful effect of Indoor formaldehyde on atopic dermatitis in children:a longitudinal study[J].Allergy,Asthma and Immunology Research,2021,13(3):468-478.
[2] Hakimei T,Hamidreza P,Yaghoub H.Phytoremediation of VOCs from indoor air by ornamental potted plants:a pilot study using a palm species under the controlled environment[J].Chemosphere,2018,197:375-381.
[3] Huang G,Yan Z X,Liu S Y,et al.Bimetallic nickel molybdate supported Pt catalyst for efficient removal of formaldehyde at low temperature[J].Journal of Environmental Sciences,2020,87(1):173-183.
[4] Zhang Z X,Jiang Z,ShangGuang W F.Low-temperature catalysis for VOCs removal in technology and application:a state-of-the-art review[J].Catalysis Today,2016,264:270-278.
[5] Chang S M,Hu S C,Shiue A,et al.Adsorption of silver nano-particles modified activated carbon filter media for indoor formaldehyde removal[J].Chemical Physics Letters,2020,757.
[6] Bellat J P,Bezverkhyy I,Weber G,et al.Capture of formaldehyde by adsorption on nanoporous materials[J].Journal of Hazardous Materials,2015,300:711-717.
[7] Zhang S C,Liu Z F,Chen D,et al.An efficient hole transfer pathway on hematite integrated by ultrathin Al2O3 interlayer and novel CuCoOx cocatalyst for efficient photoelectrochemical water oxidation[J].Applied Catalysis B:Environmental,2020,277:9.
[8] Li Z,Meng X,Zhang Z.Recent development on MoS2-based photocatalysis:a review[J].Journal of Photochemistry and Photobiology C:Photochemistry Reviews,2018,35:39-55.
[9] Gao C B,Liu F L,Yin Y D.Encapsulated metal nanoparticles for catalysis[J].Chemical Reviews,2021,121(2):834-881.
[10] Zhang N Q,Ye C L,Yan H,et al.Single-atom site catalysts for environmental catalysis[J].Nano Research,2020,13(12):3165-3182.
[11] Huang Y P,Hou C H,Hsih C,et al.Optimization of highly microporous activated carbon preparation from Moso bamboo using central composite design approach[J].Journal of the Taiwan Institute of Chemical Engineers,2015,50:266-275.
[12] Hayakawa S,Matsubara S,Sumi Y,et al.Caesium and strontium adsorption ability of activated bamboo charcoal[J].Journal of Nanotechnology,2018,15(8-10):683-688.
[13] Long W,Lan H F,Huang Y F.Evaluation of formaldehyde adsorption by bamboo charcoal using a photoacoustic method[J].International Journal of Wood Science,2010,56(4):345-349.
[14] Asada T,Ishihara S,Yamane T,et al.Science of bamboo charcoal:study on carbonizing temperature of bamboo charcoal and removal capability of harmful gases[J].Journal of Health Science,2002,48(6):473-479.
[15] Rong H Q,Ryu Z Y,Zheng J T,et al.Influence of heat treatment of rayon-based activated carbon fibers on the adsorption of formaldehyde[J].Journal of Colloid and Interface Science,2003,261(2):207-212.
[16] Boonamnuayvitaya V,Saeung S,Tanthapanichakoon W.Preparation of activated carbons from coffee residue for the adsorption of formaldehyde[J].Separation and Purification Technology,2005,42(2):159-168.
[17] Li L,Liu S Q,Liu J X.Surface modification of coconut shell based activated carbon for the improvement of hydrophobic VOC removal[J].Journal of Hazard Materials,2011,192(2):683-690.
[18] Shaarani F W,Hameed B H.Ammonia-modified activated carbon for the adsorption of 2,4-dichlorophenol[J].Chemical Engineering Journal,2011,169(1-3):180-185.
[19] Martínez F,Pariente I,Brebou C,et al.Chemical surface modified-activated carbon cloth for catalytic wet peroxide oxidation of phenol[J].Journal of Chemical Technology and Biotechnology,2014,89(8):1182-1188.
[20] 肖疆俊.多基团磁性竹炭MBBC@SDD的制备及其对废水中As(Ⅲ)的吸附研究[D].长沙:中南林业科技大学,2020.
[21] Pang Q H,Liao G F,Hu X Y,et al.Porous bamboo charcoal/TiO2 nanocomposites:preparation and photocatalytic property[J].Journal of Inorganic Materials,2019,34(2):219-224.
[22] Dao W Y,Zhuo R,Hui L,et al.Modeling of the photo decomposition of formaldehyde using bamboo charcoal loaded Ce-TiO2 as photocatalyst[J].Advanced Materials Research,2011,1266:233-235.
[23] Rengga W D P,Chafidz A,Sudibandriyo M,et al.Silver nano-particles deposited on bamboo-based activated carbon for removal of formaldehyde[J].Journal of Environmenal Chemical Engineering,2017,5(2):1657-1665.
[24] Hu W H,Feng Z X,Yang J F,et al.Combustion behaviors of molded bamboo charcoal:influence of pyrolysis temperatures[J].Energy,2021,226:120253.
[25] 艾浩.甘蔗叶活性炭的清洗制备、性能及应用研究[D].桂林:广西师范大学,2013.
[26] El S E,Ali S N,Al B,et al.Preparation and characterization of surface functionalized activated carbons from date palm leaflets and application for methylene blue removal[J].Journal of Environmental Chemical Engineering,2016,4(3):2713-2724.
[27] Ayodele R I.Ammonia and ammonium acetate modifications and characterisation of activated carbons from palm kernel shell and coconut shell[J].Waste and Biomass Valorization,2020,11:983-993.
[28] Yu Y,Ji J,Li K,et al.Activated carbon supported MnO nanoparticles for efficient ozone decomposition at room temperature[J].Catalysis Today,2020,355:573-579.
[29] 朱丽珺.竹炭/氧化锌复合材料的制备及光催化性能研究[D].南京:南京林业大学,2012.
[30] Sun H,Kwan C,Suvorova A,et al.Catalytic oxidation of organic pollutants on pristine and surface nitrogen-modified carbon nanotubes with sulfate radicals[J].Applied Catalysis B:Environmental,2014,154:134-141.
[31] Park J.稻草改性及其对重金属铜离子吸收的研究[D].沈阳:东北大学,2015.
[32] Wang W,Wang X J,Wang X,et al.Cr(Ⅵ) removal from aqueous solution with bamboo charcoal chemically modified by iron and cobalt with the assistance of microwave[J].Journal of Environmental Sciences,2013,25(9):1726-1735.
[33] 赵亚娟,陈睿,刘阳生,等.改性活性炭纤维负载无机铵盐对甲醛去除能力的影响[J].环境科学学报,2010,30(3):572-577.
[34] Zhu L,Shen D,Luo K H.A critical review on VOCs adsorption by different porous materials:species,mechanisms and modification methods[J].Journal of Hazardous Materials,2020,389:122102.
[35] Chen Z,Li P,Anderson R,et al.Balancing volumetric and gravimetric uptake in highly porous materials for clean energy[J].Science,2020,368(6488):297-304.
基金资助
国家自然科学基金(21467002);广西研究生教育创新项目(XYCSZ2021006)
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