CN116395761A - 一种纳米级球形氧化亚镍及其制备工艺和应用 - Google Patents
一种纳米级球形氧化亚镍及其制备工艺和应用 Download PDFInfo
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- 229910000480 nickel oxide Inorganic materials 0.000 title claims abstract description 59
- GNRSAWUEBMWBQH-UHFFFAOYSA-N oxonickel Chemical compound [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 title claims abstract description 48
- 238000002360 preparation method Methods 0.000 title claims abstract description 21
- 239000000047 product Substances 0.000 claims abstract description 44
- 238000006243 chemical reaction Methods 0.000 claims abstract description 28
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims abstract description 23
- 238000002156 mixing Methods 0.000 claims abstract description 20
- 239000002245 particle Substances 0.000 claims abstract description 20
- 239000007795 chemical reaction product Substances 0.000 claims abstract description 18
- 150000002815 nickel Chemical class 0.000 claims abstract description 18
- 238000003756 stirring Methods 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000003054 catalyst Substances 0.000 claims abstract description 11
- 239000011521 glass Substances 0.000 claims abstract description 11
- 238000001035 drying Methods 0.000 claims abstract description 8
- 238000000227 grinding Methods 0.000 claims abstract description 8
- 239000011259 mixed solution Substances 0.000 claims abstract description 8
- 238000005406 washing Methods 0.000 claims abstract description 8
- 239000000919 ceramic Substances 0.000 claims abstract description 7
- 239000003086 colorant Substances 0.000 claims abstract description 7
- 239000000654 additive Substances 0.000 claims abstract description 6
- 239000007772 electrode material Substances 0.000 claims abstract description 6
- RRIWRJBSCGCBID-UHFFFAOYSA-L nickel sulfate hexahydrate Chemical group O.O.O.O.O.O.[Ni+2].[O-]S([O-])(=O)=O RRIWRJBSCGCBID-UHFFFAOYSA-L 0.000 claims description 10
- 229940116202 nickel sulfate hexahydrate Drugs 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 239000002105 nanoparticle Substances 0.000 claims description 5
- 230000001590 oxidative effect Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 14
- 239000012535 impurity Substances 0.000 abstract description 8
- 239000002994 raw material Substances 0.000 abstract description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 12
- 229910000008 nickel(II) carbonate Inorganic materials 0.000 description 12
- ZULUUIKRFGGGTL-UHFFFAOYSA-L nickel(ii) carbonate Chemical compound [Ni+2].[O-]C([O-])=O ZULUUIKRFGGGTL-UHFFFAOYSA-L 0.000 description 12
- 239000000084 colloidal system Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 229910001415 sodium ion Inorganic materials 0.000 description 8
- 238000003860 storage Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 6
- 239000002244 precipitate Substances 0.000 description 6
- 229910000029 sodium carbonate Inorganic materials 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- 238000004458 analytical method Methods 0.000 description 4
- 238000001354 calcination Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 239000000376 reactant Substances 0.000 description 4
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- 238000002441 X-ray diffraction Methods 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 230000003197 catalytic effect Effects 0.000 description 3
- 238000009616 inductively coupled plasma Methods 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000012071 phase Substances 0.000 description 3
- 230000036632 reaction speed Effects 0.000 description 3
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 2
- 238000003917 TEM image Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 235000011114 ammonium hydroxide Nutrition 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000009388 chemical precipitation Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 229940078487 nickel acetate tetrahydrate Drugs 0.000 description 2
- LAIZPRYFQUWUBN-UHFFFAOYSA-L nickel chloride hexahydrate Chemical compound O.O.O.O.O.O.[Cl-].[Cl-].[Ni+2] LAIZPRYFQUWUBN-UHFFFAOYSA-L 0.000 description 2
- OINIXPNQKAZCRL-UHFFFAOYSA-L nickel(2+);diacetate;tetrahydrate Chemical compound O.O.O.O.[Ni+2].CC([O-])=O.CC([O-])=O OINIXPNQKAZCRL-UHFFFAOYSA-L 0.000 description 2
- AOPCKOPZYFFEDA-UHFFFAOYSA-N nickel(2+);dinitrate;hexahydrate Chemical compound O.O.O.O.O.O.[Ni+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O AOPCKOPZYFFEDA-UHFFFAOYSA-N 0.000 description 2
- GNMQOUGYKPVJRR-UHFFFAOYSA-N nickel(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Ni+3].[Ni+3] GNMQOUGYKPVJRR-UHFFFAOYSA-N 0.000 description 2
- 230000005476 size effect Effects 0.000 description 2
- 239000012798 spherical particle Substances 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- PWHVEHULNLETOV-UHFFFAOYSA-N Nic-1 Natural products C12OC2C2(O)CC=CC(=O)C2(C)C(CCC2=C3)C1C2=CC=C3C(C)C1OC(O)C2(C)OC2(C)C1 PWHVEHULNLETOV-UHFFFAOYSA-N 0.000 description 1
- 229910021586 Nickel(II) chloride Inorganic materials 0.000 description 1
- 241000080590 Niso Species 0.000 description 1
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 239000011149 active material Substances 0.000 description 1
- -1 and preferably Chemical compound 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004517 catalytic hydrocracking Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000005984 hydrogenation reaction Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- QMMRZOWCJAIUJA-UHFFFAOYSA-L nickel dichloride Chemical compound Cl[Ni]Cl QMMRZOWCJAIUJA-UHFFFAOYSA-L 0.000 description 1
- BFDHFSHZJLFAMC-UHFFFAOYSA-L nickel(ii) hydroxide Chemical compound [OH-].[OH-].[Ni+2] BFDHFSHZJLFAMC-UHFFFAOYSA-L 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000013033 photocatalytic degradation reaction Methods 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000012716 precipitator Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000010532 solid phase synthesis reaction Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000004611 spectroscopical analysis Methods 0.000 description 1
- 238000005118 spray pyrolysis Methods 0.000 description 1
- 239000011232 storage material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000001308 synthesis method Methods 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 238000004227 thermal cracking Methods 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
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Abstract
本发明公开了一种纳米级球形氧化亚镍及其制备工艺和应用,包括如下步骤:S1、将镍盐与无水碳酸钠搅拌混合均匀,再与水进行混合,控制反应温度为40‑60℃,混合溶液的pH值为9‑10,搅拌至反应完全;S2、将步骤S1中得到的反应产物进行研磨处理,然后在380‑520℃下焙烧处理16‑28h;S3、将焙烧后得到的产物经过多次水洗,直至其pH值为7‑7.5,再经烘干、粉碎处理,得到成品。其制备工艺简单,原料成本低廉,制得的产品杂质含量低,粒度较小,平均粒径在20nm左右,粒径较为均一,表面球形度较好,活性更高,该纳米级球形氧化亚镍用于催化剂、陶瓷添加剂与玻璃染色剂、电池电极材料、传感器等领域。
Description
技术领域
本发明涉及纳米材料制备技术领域,具体涉及一种纳米级球形氧化亚镍及其制备工艺和应用。
背景技术
纳米概念包括“尺度”与“效应”两个方面,在临界尺度下,材料的性能会产生突变。
氧化亚镍,化学式:NiO,分子量:74.71,外观为绿黑色立方晶体,溶于酸和氨水,不溶于水,受热时颜色变黄。氧化亚镍是一种重要的功能材料,随着纳米氧化亚镍的超细化,其表面结构和晶体结构发生了独特改变,导致产生了表面效应、小尺寸效应、量子尺寸效应和宏观量子隧道效应,从而使纳米氧化亚镍具有优异的催化性能、电学性能等。基于这一系列优异特性,纳米氧化镍可广泛应用于先进储能材料、催化剂材料、气体传感器、半导体等领域。
氧化亚镍的合成方法很多,主要有化学沉淀煅烧法,醇溶剂法,低热固相法等。目前,工业上普遍采用化学沉淀煅烧法,其通常以NiC12、NiSO4或Ni(NO3)2为原料,NaOH或氨水作为沉淀剂,经反应制得氢氧化镍沉淀,再在空气中煅烧而得。上述制备工艺中,原料来源、反应物配比、溶液的pH、反应温度和煅烧温度等因素对产品的产率和平均粒径均有较大的影响。现有技术中通过该方法制得的产品为无定形产品,杂质含量较高,粒度大,形貌不可控,易烧结。虽然现有技术中也提到可采用高温喷雾热解法将氯化镍溶液通过高温热裂解制得氧化亚镍,该法制得的氧化亚镍为不规则形状,流动性差,使用时不易与其它原料混合均匀,同时生产过程中溶液产生三氧化二镍杂质,影响产品质量。
发明内容
为了解决上述背景技术中存在的问题,本发明提供一种纳米级球形氧化亚镍的制备工艺,其制备工艺简单,原料成本低廉,制得的产品杂质含量低,粒度较小,平均粒径在20nm左右,粒径较为均一,表面球形度较好,活性更高。此外,本发明还提供一种采用上述制备工艺制得的粒度较小,粒径较为均一,表面球形度较好,活性更高的纳米级球形氧化亚镍,及其在催化剂、陶瓷添加剂与玻璃染色剂、电池电极材料、传感器等领域的应用。
为了实现上述目的,本发明采用以下技术方案:
本发明的第一方面,提供一种纳米级球形氧化亚镍的制备工艺,包括如下步骤:
S1、将镍盐与无水碳酸钠搅拌混合均匀,再与水进行混合,控制反应温度为40-60℃,混合溶液的pH值为9-10,搅拌至反应完全;
S2、将步骤S1中得到的反应产物进行研磨处理,然后在380-520℃下焙烧处理16-28h;
S3、将焙烧后得到的产物经过多次水洗,直至其pH值为7-7.5,再经烘干、粉碎处理,得到成品。
采用上述技术方案:
本申请中,通过控制反应体系的pH值在9-10,镍盐与碳酸钠反应速度适中且易于控制,两者反应生成碳酸镍沉淀,达到了在溶液反应中控制碳酸镍生长速度、形貌和粒度大小的目的;再将反应物过胶体磨3遍,进行充分的研磨处理,使碳酸镍均质化,随后在一定温度下将碳酸镍沉淀物进行热分解,得到粒度较小,平均粒径在20nm左右,粒径较为均一,表面球形度较好,活性更高的氧化亚镍,然后经水洗洗去多余的钠离子,产物的杂质含量低。
具体地,所述步骤S1中,镍盐为六水合硫酸镍。
镍盐为可溶性镍盐,包括六水合氯化镍、六水合硫酸镍、四水合醋酸镍、六水合硝酸镍,优选地,选用六水合硫酸镍。
具体地,所述步骤S1中,镍盐与无水碳酸钠的重量比为(1.6-2.4):1。
具体地,所述步骤S2中,焙烧处理在氧化性气氛调控下进行。
氧化性气氛为空气气氛或氧气气氛。
本发明的第二方面,提供一种由上述制备工艺制备而成的纳米级球形氧化亚镍,所述纳米级球形氧化亚镍的表面球形度较好,平均粒径为18-22nm。
采用本申请中制备工艺制得的纳米级球形氧化亚镍,其为球形粒子,表面球形度较好,粒度较小,平均粒径在20nm左右,粒径较为均一,活性更高。
本发明的第三方面,提供一种上述纳米级球形氧化亚镍的应用,所述纳米级球形氧化亚镍用于催化剂、陶瓷添加剂与玻璃染色剂、电池电极材料、传感器领域。
具体地,
1.纳米氧化镍用于催化剂中:
纳米NiO是一种催化作用较好的氧化催化剂,Ni2+具有3d轨道,对多电子氧具有择优吸附的倾向,对其它还原气体也有活化作用,并对还原气体的O2起催化作用,在有机物的分解合成,转化过程中,如汽油氢化裂化,是石化处理中烃类转化,重油氢化过程中,纳米NiO是良好的催化剂。在废水处理中,NiO是除去其中CH4,氰化物,N2,促使NOx分解的催化剂。纳米NiO作为光催化降解酸性红的催化剂,在处理有机染料废水中,效果非常显著。
2.纳米氧化镍用于陶瓷添加剂与玻璃染色剂:
陶瓷制品中用纳米NiO来提高其冲击力,当加入NiO(O.02(wt)%),还可以提高材料的各项电性能,如压电性能和介电性能。在玻璃中加纳米NiO主要是控制玻璃的颜色,在能吸收紫外线的着色稳定的棕色透明玻璃中就含少量的NiO。透明玻璃镜和装饰用玻璃中,均添加了适量的纳米NiO作着色剂。
3.纳米氧化镍应用于传感器
NiO是近几年来越来越受到重视的气体传感器材料。目前已有用纳米NiO制作成的甲醛传感器,CO传感器,H2传感器等应用于实际生产。
4.纳米氧化镍用于电池电极材料方面:
普通氧化镍蓄电池放电30min后,其端电压就接近衰竭,而纳米氧化镍蓄电池到了90min以后才出现衰竭,表现出良好的放电性能。产生这一现象的原因是因为这些纳米微粒与导电材料分布于正极活性物质的空隙中,这样既有利于电子电荷的传递,也有利于离子电荷的传递。并且其小尺寸效应增加了活性物质的空隙率和反应的表面积。普通氧化镍蓄电池一开始就表现为较大电流的充电,而纳米氧化镍蓄电池则表现为小电流充电,60min后电流趋于相等,表现出良好的充电性能。因此纳米氧化镍蓄电池具有优良的应用前景。有研究表明颗粒状氧化镍比针形氧化镍具有更好的电化学性能和更高的比电容。
与现有技术相比,本发明具有如下有益效果:
本发明中通过控制反应体系的pH值在9-10,镍盐与碳酸钠反应速度适中且易于控制,两者反应生成碳酸镍沉淀,达到了在溶液反应中控制碳酸镍生长速度、形貌和粒度大小的目的;再将反应物过胶体磨3遍,进行充分的研磨处理,使碳酸镍均质化,随后在一定温度下将碳酸镍沉淀物进行热分解,得到粒度较小,平均粒径在20nm左右,粒径较为均一,表面球形度较好,活性更高的氧化亚镍,然后经水洗洗去多余的钠离子,产物的杂质含量低。
附图说明
下面结合附图与具体实施例对本发明作进一步详细说明。
图1为实施例1制得的纳米级球形氧化亚镍的XRD图;
图2为实施例1制得的纳米级球形氧化亚镍的TEM图;
图3为实施例1制得的纳米级球形氧化亚镍的BET测试图;
具体实施方式
为了便于理解本发明,下文将结合较佳的实施例对本发明作更全面、细致地描述,但本发明的保护范围并不限于以下具体的实施例。
除非另有定义,下文中所使用的所有专业术语与本领域技术人员通常理解的含义相同。本文中所使用的专业术语只是为了描述具体实施例的目的,并不是旨在限制本发明的保护范围。
除有特别说明,本发明中用到的各种试剂、原料均为可以从市场上购买的商品或者可以通过公知的方法制得的产品。
本发明提供一种纳米级球形氧化亚镍的制备工艺,包括如下步骤:
S1、将可溶性镍盐与无水碳酸钠搅拌混合均匀,再与水进行混合,控制反应温度为40-60℃,混合溶液的pH值为9-10,搅拌至反应完全;
S2、将步骤S1中得到的反应产物过胶体磨3遍进行研磨处理,使其均质化,然后在380-520℃下焙烧处理16-28h;
S3、将焙烧后得到的产物经过多次水洗,洗去多余的钠离子,直至其pH值为7-7.5,再经烘干、粉碎处理,得到成品。
具体地,步骤S1中,可溶性镍盐,包括六水合氯化镍、六水合硫酸镍、四水合醋酸镍、六水合硝酸镍,优选地,选用六水合硫酸镍。
具体地,步骤S1中,镍盐与无水碳酸钠的重量比为(1.6-2.4):1。
具体地,步骤S2中,焙烧处理在氧化性气氛调控下进行,氧化性气氛为空气气氛或氧气气氛。
采用上述制备工艺制得的纳米级球形氧化亚镍,其为球形粒子,表面球形度较好,粒度较小,平均粒径在18-22nm,粒径较为均一,活性更高。
上述纳米级球形氧化亚镍可用于催化剂、陶瓷添加剂与玻璃染色剂、电池电极材料、传感器领域。
实施例1
一种纳米级球形氧化亚镍的制备工艺,包括如下步骤:
S1、将重量比为2:1的六水合硫酸镍与无水碳酸钠搅拌混合均匀,再与水进行混合,控制反应温度为50℃,混合溶液的pH值为9.6,搅拌至反应完全;
S2、将步骤S1中得到的反应产物过胶体磨3遍进行研磨处理,使其均质化,然后在450℃下焙烧处理22h,焙烧处理在空气气氛调控下进行;
S3、将焙烧后得到的产物经过多次水洗,洗去多余的钠离子,直至其pH值为7,再经烘干、粉碎处理,得到成品。
实施例2
一种纳米级球形氧化亚镍的制备工艺,包括如下步骤:
S1、将重量比为1.6:1的六水合硫酸镍与无水碳酸钠搅拌混合均匀,再与水进行混合,控制反应温度为40℃,混合溶液的pH值为10,搅拌至反应完全;
S2、将步骤S1中得到的反应产物过胶体磨3遍进行研磨处理,使其均质化,然后在380℃下焙烧处理28h,焙烧处理在空气气氛调控下进行;
S3、将焙烧后得到的产物经过多次水洗,洗去多余的钠离子,直至其pH值为7.5,再经烘干、粉碎处理,得到成品。
实施例3
一种纳米级球形氧化亚镍的制备工艺,包括如下步骤:
S1、将重量比为2.1:1的六水合硫酸镍与无水碳酸钠搅拌混合均匀,再与水进行混合,控制反应温度为60℃,混合溶液的pH值为9.7,搅拌至反应完全;
S2、将步骤S1中得到的反应产物过胶体磨3遍进行研磨处理,使其均质化,然后在520℃下焙烧处理16h,焙烧处理在空气气氛调控下进行;
S3、将焙烧后得到的产物经过多次水洗,洗去多余的钠离子,直至其pH值为7.2,再经烘干、粉碎处理,得到成品。
实施例4
一种纳米级球形氧化亚镍的制备工艺,包括如下步骤:
S1、将重量比为2.4:1的六水合硫酸镍与无水碳酸钠搅拌混合均匀,再与水进行混合,控制反应温度为50℃,混合溶液的pH值为9,搅拌至反应完全;
S2、将步骤S1中得到的反应产物过胶体磨3遍进行研磨处理,使其均质化,然后在450℃下焙烧处理22h,焙烧处理在空气气氛调控下进行;
S3、将焙烧后得到的产物经过多次水洗,洗去多余的钠离子,直至其pH值为7,再经烘干、粉碎处理,得到成品。
实验例
1.X射线衍射测试分析
实施例1中制得的产物的X射线衍射图谱见图1。由图1可知,产物为单一相成分的NiO纯相。
2.透射电镜测试分析
实施例1中制得的产物的透射电镜照片见图2。由图2可以看出,氧化亚镍表面球形度较好,粒度较小,平均粒径在20nm,粒径较为均一。
3.ICP(电感耦合等离子直读光谱)测试分析
实施例1中制得的产物的ICP测试结果见表1。由表1中测试结果可知,样品的纯度>99.5%,即采用本发明中制备工艺制得的纳米级球形氧化亚镍的纯度高,无杂相。
表1
4.比表面积测试分析
实施例1中制得的产物的BET比表面积测试结果见图3,产物NiO粉末的比表面积为46.84m2/g,经BET结果计算出产物NiO的平均粒径为19nm,与透射电镜测试结果测得的平均粒径为20nm的结果一致。
综上,本发明中通过控制反应体系的pH值在9-10,镍盐与碳酸钠反应速度适中且易于控制,两者反应生成碳酸镍沉淀,达到了在溶液反应中控制碳酸镍生长速度、形貌和粒度大小的目的;再将反应物过胶体磨3遍,进行充分的研磨处理,使碳酸镍均质化,随后在一定温度下将碳酸镍沉淀物进行热分解,得到粒度较小,平均粒径在20nm左右,粒径较为均一,表面球形度较好,活性更高的氧化亚镍,然后经水洗洗去多余的钠离子,产物的杂质含量低。
以上应用了具体个例对本发明进行阐述,只是用于帮助理解本发明,并不用以限制本发明。对于本发明所属技术领域的技术人员,依据本发明的思想,还可以做出若干简单推演、变形或替换。
Claims (6)
1.一种纳米级球形氧化亚镍的制备工艺,其特征在于,包括如下步骤:
S1、将镍盐与无水碳酸钠搅拌混合均匀,再与水进行混合,控制反应温度为40-60℃,混合溶液的pH值为9-10,搅拌至反应完全;
S2、将步骤S1中得到的反应产物进行研磨处理,然后在380-520℃下焙烧处理16-28h;
S3、将焙烧后得到的产物经过多次水洗,直至其pH值为7-7.5,再经烘干、粉碎处理,得到成品。
2.根据权利要求1所述的纳米级球形氧化亚镍的制备工艺,其特征在于,所述步骤S1中,镍盐为六水合硫酸镍。
3.根据权利要求2所述的纳米级球形氧化亚镍的制备工艺,其特征在于,所述步骤S1中,镍盐与无水碳酸钠的重量比为(1.6-2.4):1。
4.根据权利要求1所述的纳米级球形氧化亚镍的制备工艺,其特征在于,所述步骤S2中,焙烧处理在氧化性气氛调控下进行。
5.一种由权利要求1-4中任一项所述的制备工艺制备而成的纳米级球形氧化亚镍,其特征在于,所述纳米级球形氧化亚镍的表面球形度较好,平均粒径为18-22nm。
6.一种如权利要求5所述的纳米级球形氧化亚镍的应用,其特征在于,所述纳米级球形氧化亚镍用于催化剂、陶瓷添加剂与玻璃染色剂、电池电极材料、传感器领域。
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